# 400+ Hydraulics and Fluid Mechanics Multiple Choice Questions

1.  The simple elbow draft tube is placed close to the_______.

B. Tail race.

C. Tank.

D. Nozzle.

2.  Turbine that consists of draft tubes is called as__________.

A. Impulse turbine.

B. Curtis turbine.

C. Rateau turbine.

D. Reaction turbine.

3.  Which of the following is a 50 percent reaction turbine?.

A. Parsons turbine.

B. Curtis turbine.

C. Rateau turbine.

D. Pelton wheel.

4.  The simple elbow draft tube helps to cut down the cost of excavation..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

5.  The exit diameter for a simple elbow draft tube should be________.

A. Large.

B. Small.

C. Very small.

D. Same.

6.  Properties that do not affect a draft tube is _______.

A. Pressure.

B. Temperature.

C. Pressure velocity.

D. Velocity.

7.  The other name for elbow with varying cross section tube is called_____.

A. Pressure tube.

B. Bent draft tube.

C. Velocity tube.

D. Sink tube.

8.  What is the efficiency of the simple elbow type draft tube?.

A. 10.0.

B. 30.0.

C. 60.0.

D. 90.0.

9.  The horizontal portion of the draft tube is usually bent to prevent entry of air from the exit end..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

10.  The efficiency of the draft tube is ratio of ________.

A. Pressure energy by kinetic energy.

B. Kinetic energy by Pressure energy.

C. Kinetic energy into mechanical energy.

D. Pressure into mechanical.

Answer = Kinetic energy by Pressure energy

11.  Draft tubes are not used in which of the following turbines?.

A. Francis.

B. Reaction.

C. Kaplan.

D. Pelton.

12.  The draft tube at the exit of the nozzle increases the _______.

A. Temperature.

B. Pressure.

C. Volume of the flow.

D. Density of flow.

13.  Efficiency of a draft tube gives __________.

A. Temperature difference.

B. Pressure difference.

C. Kinetic energy difference.

D. Density of flow.

14.  Cavitation in a draft tube occurs when _______.

A. Temperature difference.

B. Pressure drop.

C. Kinetic energy difference.

D. Density of flow.

15.  Which among the following is an important parameter to avoid cavitation?.

A. Tail race length.

C. Height of draft tube.

D. Pump.

Answer = Height of draft tube

16.  The draft tube is situated in the _______.

A. Inlet.

B. Outlet.

C. Tank.

D. Nozzle.

17.  Which equation is applied to determine the flow?.

A. Newtons equation.

B. Rutherford’s equation.

C. Bernoulli’s equation.

18.  Height of the draft tube is denoted by _____.

A. H.

B. h.

C. z.

D. x.

19.  Draft tube allows turbine to be placed above the tail race..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

20.  The efficiency of the draft tube depends on the ______.

A. Heat.

B. Pressure.

C. Temperature.

D. Pressure and temperature.

21.  Draft tubes have _________ shafts.

A. Horizontal.

B. Vertical.

C. Circular.

D. Cross sectional.

22.  Draft tubes are situated at the outlet in____________.

A. Pelton.

B. Reaction.

C. Kaplan.

D. Francis.

23.  Efficiency of a draft tube is directly proportional to its __________.

A. Temperature.

B. Pressure.

C. Velocity.

D. Density.

24.  Z is a draft tube is _______.

A. Temperature difference.

B. Pressure drop.

C. Kinetic energy difference.

25.  Draft tube operates at ______.

A. Same efficiency.

B. Different efficiency.

C. Turbine.

D. Pump.

26.  The draft tube is an ________.

A. Interior tube.

B. Exterior tube.

C. Tank depth alternator.

D. Nozzle tube.

27.  What type of pressure does the draft tube depend upon?.

A. Gauge pressure.

B. Atm pressure.

C. Normal pressure.

D. Normal and Atm pressure.

28.  Gauge pressure of the draft tube is denoted by _____.

A. P.

B. h.

C. z.

D. x.

29.  Draft tube allows turbine to be placed below the tail race..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

30.  Specific speed is denoted by ________.

A. N.

B. n.

C. Ns.

D. S.

31.  Specific speeds are used in pumps to determine ________.

A. Temperature.

B. Reaction speed.

C. Suction specific speed.

D. Wheel speed.

32.  The tube at the exit of the nozzle increases the _______.

A. Temperature.

B. Pressure.

C. Volume of the flow.

D. Density of flow.

33.  Specific speed is used to characterize _______.

A. Turbomachinery speed.

B. Flow speed.

C. Energy flow.

D. Heat generated.

34.  Specific speed predicts the shape of a/an _________.

A. Pump.

C. Impeller.

D. Motor.

35.  What helps in categorizing the impellers?.

A. Quasi static number.

B. Rotor.

C. Height of draft tube.

D. Pump.

36.  Imperial units is defined as _________.

A. Temperature by pressure.

B. Tail race and head race.

C. Revolutions per minute.

D. Turbine performance.

37.  Ratio of pump or turbine with reference pump or turbine is called as _________.

A. Efficiency.

B. Performance.

C. Heat generated.

D. Relative velocity.

38.  Low specific speed in hydraulic head is developed due to _________.

A. Mass flow rate.

B. Increase in temperature.

C. Centrifugal force.

D. Increase in pressure.

39.  Centrifugal pump impellers have speed ranging from ________.

A. 500- 10000.

B. 50- 100.

C. 200-300.

D. 0-50.

40.  What is the unit of specific speed in metric system?.

A. m.s.

B. m/s.

C. m3/s.

D. m.

41.  Specific speed develop a hydraulic flow through the centrifugal pumps..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

42.  Net suction speed is used in problems with cavitation..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

43.  Low specific speed in hydraulic head is developed due to _________.

A. Mass flow rate.

B. Increase in temperature.

C. Centrifugal force.

D. Increase in pressure.

44.  The runner diameter in a turbine is denoted as __________.

A. A.

B. Dr.

C. Rr.

D. De.

45.  Specific speed is the speed of the turbine which is similar to its ________.

A. Temperature difference.

B. Pressure difference.

C. Aspect ratio.

D. Speed of rotor.

46.  Specific speeds are used in pumps to determine ________.

A. Temperature.

B. Reaction speed.

C. Suction specific speed.

D. Wheel speed.

47.  Specific speed develops a unit power under a unit _______.

A. Temperature.

B. Pressure.

C. Volume of the flow.

48.  Impeller in a motor is used to _________.

A. Change temperatures.

B. Change Pressure.

C. Kinetic energy change.

D. Change density.

49.  Hydraulic head is also called as _________.

50.  Specific speed of a Pelton wheel with single jet is _______.

A. 8.5 to 30.

B. 30 to 51.

C. 51 to 225.

D. 230 to 500.

51.  Specific speed is an index used to predict _______.

B. Tail race distance.

C. Tank dimensions.

D. Turbine performance.

52.  Specific speed of a Pelton wheel with multiple jets is _______.

A. 8.5 to 30.

B. 30 to 51.

C. 51 to 225.

D. 230 to 500.

53.  Specific speed of a Francis turbine is _______.

A. 8.5 to 30.

B. 30 to 51.

C. 51 to 225.

D. 230 to 500.

54.  Specific speed of a Kaplan turbine is _______.

A. 8.5 to 30.

B. 30 to 51.

C. 51 to 225.

D. 355 to 860.

55.  Specific speed less than 500 are called _________.

A. Positive displacement pumps.

B. Negative displacement pumps.

C. Draft tubes.

D. Tanks.

56.  With the increase in specific speeds, ________.

B. Tail race distance increases.

C. Tank dimensions increases.

D. Diameters of impeller increases.

Answer = Diameters of impeller increases

57.  Specific speed is used to predict desired pump or turbine performance..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

58.  Once we know the desired functions of the specific speed, it is easier to calculate its components units..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

59.  Constant head curves are also called as _______.

B. Tail race curves.

C. Main characteristic curves.

D. Impeller curves.

60.  The speed of the turbine in a constant head curve is varied by __________.

A. Temperature change.

B. Reaction speed change.

C. Changing the gate opening.

D. Wheel speed change.

Answer = Changing the gate opening

61.  Constant speed curves travel at constant speed when the value is equal to _______.

A. 0.0.

B. 1.0.

C. 2.0.

D. 3.0.

62.  Power of a turbine is measured ______.

A. Mechanically.

B. Electrically.

C. Chemically.

D. Thermally.

63.  Which among the following is not a parameter to determine the efficiency of the turbine?.

A. Unit speed.

B. Unit power.

C. Unit volume.

D. Unit discharge.

64.  Which among the following is not an important parameter to determine the performance of the turbine?.

A. Speed.

B. Discharge.

D. Volume of tank.

65.  Which among the following is not a type of curve?.

A. Logarithimic curve.

B. Straight curve.

C. Pressure vs power.

D. Efficiency vs speed.

66.  The inlet passage of water entry is controlled by ________.

B. Gate.

C. Tail race.

D. Pump.

67.  Overall efficiency vs what is drawn to determine the turbine performance?.

A. Unit Discharge.

B. Unit speed.

C. Unit power.

D. Unit pressure.

68.  Constant discharge takes place due to _______.

A. Unit Discharge.

B. Unit speed.

C. Unit power.

D. Unit pressure.

69.  All the characteristic curves are drawn with respect to __________.

A. Unit Discharge.

B. Unit speed.

C. Unit power.

D. Unit pressure.

70.  Constant head curves are also called as _______.

B. Tail race curves.

C. Main characteristic curves.

D. Impeller curves.

71.  In constant speed curves, the speed is kept a constant varying its head..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

72.  In all the characteristic curves, the overall efficiency is aimed at the maximum value..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

73.  Constant efficiency curves are plotted using _______.

B. Constant speed curves.

C. Main characteristic curves.

D. Constant speed and constant head.

74.  Constant speed curves are also called as _______.

A. Main characteristic curves.

B. Turbine curves.

C. Tail race curves.

D. Impeller curves.

75.  Constant speed curve is denoted as _____.

A. T.

B. V.

C. c.

D. V.

76.  Constant speed curves are ________.

A. Scalar quantities.

B. Vector quantities.

C. Constant quantities.

D. Different conditions.

77.  Constant speed is measured _________.

A. Mechanically.

B. Electrically.

C. Chemically.

D. Thermally.

78.  Constant speed curves are determined by the _________.

A. Arc length.

B. Power.

C. Heat.

D. Temperature.

79.  Which component is necessary for writing the velocity equation?.

A. Cos component.

B. Sine Component.

C. Cos and sine component.

D. Independent.

Answer = Cos and sine component

80.  Which among the following is not a shape for a curve?.

A. Logarithmic curve.

B. Helix curve.

C. Straight curve.

D. Speed curve.

81.  How do we plot points in a curve?.

A. Analytical approach.

B. General approach.

C. Tail approach.

82.  Plotting sine curve will take place along the _________.

A. y axis.

B. x axis.

C. z axis.

D. x and z.

83.  In analytical approach, dp= __________.

A. vdt.

B. v.

C. dt.

D. dx.

84.  The equation is general approach is called as central difference..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

85.  The approximate value of the constant speed curve is given by ratio of ________.

A. dy/dp.

B. dx/dp.

C. dt/dx.

D. dt/dy.

86.  In constant speed curves, the velocity is kept a constant varying its head..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

87.  The performance of a characteristic curve is kept at a high value..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

88.  In nozzle governing, the flow rate of steam is regulated by _________.

A. Nozzles.

B. Pumping.

C. Drafting.

D. Intercooling.

89.  The flow rate of steam is controlled by regulating the _________.

A. Steam.

B. Pressure.

C. Temperature.

D. Speed.

90.  The main function of nozzle is to __________.

A. Varying temperatures.

B. Pressure variations.

D. Heat variations.

91.  What is primary objective of steam turbine governing?.

A. Maintain constant speed.

B. Maintain constant pressure.

C. Maintain constant temperature.

D. Maintain constant expansion.

92.  What is the purpose of a steam turbine governing?.

A. Controls speed.

B. Controls flow rate.

C. Controls volume.

D. Controls discharge.

93.  Which among the following control the flow rate?.

A. Valve.

B. Pump.

D. Tank pipe.

94.  The advantage of nozzle governing is that no regulating pressure is applied..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

95.  During the steam turbine governing, what remains a constant?.

A. Speed of rotation.

B. Flow rate.

D. Volume of fluid.

96.  When do we apply by pass governing?.

B. When Unit speed decreases.

C. When Unit power increases.

D. When Unit pressure decreases.

97.  When bypass valve is opened to _______.

A. Increase Pressure.

B. Increase Unit speed.

C. Increase Unit power.

D. Increase the amount of fresh steam.

Answer = Increase the amount of fresh steam

98.  What is the unit of steam rate?.

A. kg.

B. kg/m.

C. kg/kWh.

D. N/m.

99.  With the increase in load, Energy in the turbine ________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

100.  Combination governing involves usage of two or more governing..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

101.  When the mechanical speed of the shaft increases beyond 110 percent, we use _________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

102.  When the balancing of the turbine is disturbed, we use ________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

103.  In nozzle governing, the flow rate of steam is regulated by _________.

A. Nozzles.

B. Pumping.

C. Drafting.

D. Intercooling.

104.  The flow rate of steam is controlled by regulating the_________.

A. Steam.

B. Pressure.

C. Temperature.

D. Speed.

105.  The main function of nozzle is to __________.

A. Varying temperatures.

B. Pressure variations.

D. Heat variations.

106.  What is primary objective of steam turbine governing?.

A. Maintain constant speed.

B. Maintain constant pressure.

C. Maintain constant temperature.

D. Maintain constant expansion.

107.  Which among the following is not a parameter to determine the efficiency of the turbine?.

A. Unit speed.

B. Unit power.

C. Unit volume.

D. Unit discharge.

108.  Which among the following control the flow rate?.

A. Valve.

B. Pump.

D. Tank pipe.

109.  The advantage of nozzle governing is that no regulating pressure is applied..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

110.  The inlet passage of water entry is controlled by ________.

B. Gate.

C. Tail race.

D. Pump.

111.  When do we apply by pass governing?.

B. When Unit speed decreases.

C. When Unit power increases.

D. When Unit pressure decreases.

112.  When bypass valve is opened to _______.

A. Increase Pressure.

B. Increase Unit speed.

C. Increase Unit power.

D. Increase the amount of fresh steam.

Answer = Increase the amount of fresh steam

113.  What is the unit of steam rate?.

A. kg.

B. kg/m.

C. kg/kWh.

D. N/m.

114.  With the increase in load, Energy in the turbine ________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

115.  Combination governing involves usage of two or more governing..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

116.  When the mechanical speed of the shaft increases beyond 110 percent, we use _________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

117.  When the balancing of the turbine is disturbed, we use ________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

118.  Centrifugal pump is a_________.

A. Turbomachinery.

B. Flow regulating device.

C. Drafting device.

D. Intercooling device.

119.  Turbomachines work under ________.

A. Newtons first law.

B. Newtons second law.

C. Newtons third law.

D. Kepler’s law.

120.  The main function of nozzle is to __________.

A. Varying temperatures.

B. Pressure variations.

D. Heat variations.

121.  The main function of centrifugal pumps are to ________.

A. Transfer speed.

B. Transfer pressure.

C. Transfer temperature.

D. Transfer energy.

122.  Centrifugal pumps transfer energy from _______.

A. Rotor to fluid.

B. Fluid to rotor.

C. Draft to rotor.

D. Rotor to draft.

123.  Which among the following control the flow rate?.

A. Valve.

B. Pump.

D. Tank pipe.

124.  Turbines and compressors work with the gas, while centrifugal pump transfers energy..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

125.  The inlet passage of water entry is controlled by ________.

B. Gate.

C. Tail race.

D. Pump.

126.  Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

127.  Centrifugal pumps are used to transport ________.

A. Pressure.

B. Speed.

C. Power.

D. Fluid.

128.  Centrifugal pumps transport fluids by converting _________.

A. Kinetic energy to hydrodynamic energy.

B. Hydrodynamic energy to kinetic energy.

C. Mechanical energy to kinetic energy.

D. Mechanical energy to Hydrodynamic energy.

Answer = Kinetic energy to hydrodynamic energy

129.  With the increase in load, Energy in the turbine________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

130.  The rotational kinetic energy comes from ______.

A. Engine motor.

B. Pump.

C. Tank.

D. Draft tube.

131.  When the balancing of the turbine is disturbed, we use ________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

132.  The fluid coming into the centrifugal pump is accelerated by ________.

A. Throttle.

B. Impeller.

C. Nozzle.

D. Governor.

133.  A gear pump uses ___________.

A. Petrochemical pumps.

B. Meshing of gears.

C. Froth pumps.

D. Airlift pumps.

134.  The fundamental significance of all the turbomachinery is _______.

A. Conservation of momentum.

B. Conservation of mass.

C. Conservation of heat.

D. Conservation of speed.

135.  The most common pump used for hydraulic fluid power application is __________.

A. Centrifugal pumps.

B. Gear pump.

C. Froth pumps.

D. Airlift pumps.

136.  The change of angular momentum in a pump is equal to the _________.

A. Sum of speeds.

B. Sum of individual momentum.

C. Sum of temperatures.

D. Sum of energy transferred from a body.

Answer = Sum of individual momentum

137.  Conservation of angular momentum is described by _______.

A. Newtons equation.

B. Euler’s equation.

C. Rutherford’s equation.

D. Maxim equation.

138.  Gear pumps are mainly used in chemical installations because they pump ________.

A. High viscosity fluids.

B. High density fluids.

C. High pressure fluids.

D. High temperature fluids.

139.  Gear pumps convert rotational kinetic energy to hydrodynamic energy..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

140.  The inlet passage of centrifugal pump is controlled by ________.

A. Gate.

C. Turbine.

D. Pump.

141.  Absolute exit velocity in a pump is denoted as ______.

A. c2.

B. v2.

C. p2.

D. w2.

142.  Gear pumps are used to transport ________.

A. Pressure.

B. Speed.

C. Power.

D. Fluid.

143.  Vertical Centrifugal pumps are also called as _________.

A. Cantilever pumps.

B. Hydrodynamic pump.

C. Mechanical pump.

D. Hydroelectric pump.

144.  With the increase in load, Energy in the turbine________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

145.  The rotational kinetic energy comes from ______.

A. Engine motor.

B. Pump.

C. Tank.

D. Draft tube.

146.  When the balancing of the turbine is disturbed, we use ________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

147.  Gear pumps are ___________.

A. Tangential flow pumps.

B. Positive displacement pumps.

C. Negative displacement pumps.

148.  The fluid gains _________ while passing through the impeller..

A. Velocity.

B. Pressure.

C. Temperature.

D. Velocity and pressure.

149.  What is the shape of the diffuser in the centrifugal pump?.

A. Round.

B. Dough nut.

C. Rectangle.

D. Cylindrical.

150.  When the casing in a centrifugal pump decelerates the flow, what increases?.

A. Pressure.

B. Temperature.

C. Volume.

D. Flow rate.

151.  The velocity imparted by the impeller is converted into _________.

A. Pressure energy.

B. Kinetic energy.

C. Momentum.

D. Potential energy.

152.  The consequence of Newtons second law is_________.

A. Conservation of angular momentum.

B. Conservation of mass.

C. Conservation of potential energy.

D. Conservation of kinetic energy.

Answer = Conservation of angular momentum

153.  Change of angular momentum is equal to ________.

A. Sum of external moments.

B. Sum of their potential energies.

C. Sum of their kinetic energies.

D. Sum of their pressures.

Answer = Sum of external moments

154.  Euler developed the head pressure equation in centrifugal pumps..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

155.  What is a major advantage of centrifugal pump?.

A. Cost.

B. Simple in construction.

C. Efficiency.

D. Pump parameters.

156.  ‘Ht’ means _______.

157.  Centrifugal pumps are used to transport ________.

A. Pressure.

B. Speed.

C. Power.

D. Fluid.

158.  Different velocities in a centrifugal pump are determined by using ________.

A. Velocity triangle.

B. Reynolds number.

C. Froude number.

D. Overall efficiency.

159.  Due to its impeller action, centrifugal pumps can cover a wide range of fluid pump applications..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

160.  With the increase in the input power, efficiency _______.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

161.  What is unit of standard acceleration?.

A. kg/m.

B. kg/s.

C. kg/m3.

D. N/m.

162.  What does PSP stand for?.

A. Pump start procedure.

B. Positive start pump.

C. Pump start pointer.

D. Positive start pointer.

163.  What is the unit of flow rate?.

A. kg.m.

B. kg/m.

C. m3/s.

D. /s.

164.  With the increase in the flow rate, efficiency ______.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

165.  Pump efficiency is defined as the ratio of ___________.

A. Pressure to temperature.

B. Temperature to pressure.

C. Water horsepower to pump horsepower.

D. Pump horse power to water horse power.

Answer = Water horsepower to pump horsepower

166.  The difference in the total head of the pump is called _______.

167.  The ratio of manometric head to the work head is called _______.

168.  What is the unit of energy head?.

A. m.

B. m/s.

C. m3/s.

D. /s.

169.  With the increase in energy head, efficiency ________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

170.  The head added by the pump is a sum of _________.

A. Pressure.

B. Static lift.

C. Volume.

D. Flow rate.

171.  Power is most commonly expressed as ________.

A. m.

B. kW.

C. m3/s.

D. /s.

172.  PHE stands for __________.

A. Pump Hydraulic efficiency.

B. Pressure Hydraulic efficiency.

C. Power Hydraulic efficiency.

D. Pump hydraulic engine.

173.  Vertical centrifugal pumps are also called as cantilever pumps..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

174.  With increase in power, the efficiency_________.

A. Decreases.

B. Increases.

C. Remains same.

D. Independent.

175.  Vertical pumps utilize unique shaft and bearing support configuration..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

176.  Which among the following is used in mineral industries?.

A. Vertical pumps.

B. Horizontal pumps.

C. Froth pumps.

D. Multistage pumps.

177.  Vertical centrifugal pumps are also called as ________.

A. Froth pumps.

B. Multistage pumps.

C. Cantilever pumps.

D. Magnetic pumps.

178.  Vertical pump uses _______.

A. Draft tube.

B. Throttle bush.

C. Stuffing box.

D. Interlining.

179.  When the casing in a centrifugal pump decelerates the flow, what increases?.

A. Pressure.

B. Temperature.

C. Volume.

D. Flow rate.

180.  The maximum volumetric efficiency of a pump(100cc) is ________.

A. 0.6.

B. 0.7.

C. 0.8.

D. 0.9.

181.  The most common application of vertical centrifugal pump is used in _______.

A. Parts washer.

B. Mineral industry.

C. Paper plating.

D. Jukebox.

182.  What does BEP stand for?.

A. Best efficiency point.

B. Brake ejection point.

C. Break effect point.

D. Best effect point.

183.  The height of a column in a pump is called as _______.

184.  The centrifugal pump has varying flow depending on the _________.

A. Pressure.

B. Static lift.

C. Volume.

D. Flow rate.

185.  What is purpose of froth in froth pumps?.

A. Separates rich minerals.

B. Mixes rich minerals.

C. Removes ores.

D. Detects oil.

186.  Froth contains air that blocks the pumps..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

187.  When froth blocks the pump, it leads to _______.

A. Separation of rich minerals.

B. Mixing of rich minerals.

C. Removing of ores.

D. Loss of prime.

188.  What affects volumetric efficiency of the pump?.

A. Complex interactions.

B. Internal interactions.

C. Retain flow.

D. Air flow.

189.  The Positive Displacement Pump has more or less a constant flow regardless of the system pressure or head..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

190.  What is the purpose of inducer in a froth pump?.

A. It recirculates air.

B. The pressurizes the air.

C. Froths are generated.

D. It breaks the bubbles.

Answer = It breaks the bubbles

191.  A multistage centrifugal pumps has more than two _______.

A. Pumps.

B. Impellers.

C. Turbines.

D. Magnetic pumps.

192.  The impeller is mounted on a ________.

A. Draft tube.

B. Throttle bush.

C. Stuffing box.

D. Shaft.

193.  At each stage the fluid is directed ________.

A. Towards the centre.

B. Away the centre.

C. Towards the surface.

D. Away from the centre.

194.  If the cylinder is filled with fuel or air it is said to be ___________.

A. 100% efficient.

B. Transfer efficient.

C. Nil efficient.

D. Flow effective.

195.  SOH in a pump stands for_______.

B. Shut off heat.

C. Shut off hybrid.

196.  At higher pressures, the impeller is connected in _______.

A. Series.

B. Parallel.

C. Equilibrium.

D. Series and parallel.

197.  When the flow output is higher, impellers are connected in________.

A. Series.

B. Parallel.

C. Equilibrium.

D. Series and parallel.

198.  The point at which piping system controls the flow rate is called ______.

A. Pressure point.

B. Static lift.

C. Operating point.

D. Flow point.

199.  What is the common application of multistage centrifugal pump?.

A. Mineral industries.

B. Boiler feed water pump.

C. Removes ores.

D. Detects oil.

Answer = Boiler feed water pump

200.  A multistage centrifugal pump produces a pressure of __________.

A. 10 Pa.

B. 100 MPa.

C. 21 MPa.

D. 150 MPa.

201.  All energy that is transferred from the fluid is derived from ________.

A. Electrical energy.

B. Mechanical energy.

C. Thermal energy.

D. Chemical energy.

202.  The point at which the centrifugal pump operates at maximum efficiency is called _______.

A. Duty point.

B. Flow point.

C. Static point.

D. Operating point.

203.  The energy transferred can be measured by isentropic compression..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

204.  What does TDH stand for?.

205.  The mechanical energy is developed by the impeller..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

206.  The mechanical energy can be measured by ______.

B. Isentropic compression.

D. Isentropic expansion.

207.  How many impellers does a multistage centrifugal pump have?.

A. Zero.

B. One.

C. Exactly two.

D. Two and more.

208.  The energy usage in pumping installation is determined by _______.

A. Friction characteristics.

B. Pipe diameter.

C. Surface tension.

D. Thermal expansion.

209.  Which among the following is a friction factor?.

A. Newtons factor.

B. Darcy’s factor.

C. Transfer temperature.

D. Heizenberg’s factor.

210.  What is the dimension for Darcy’s friction factor?.

A. kg/m.

B. N/mm.

C. kg.

D. Dimensionless.

211.  Formation of bubbles in an impeller is called ______.

A. Cavities.

B. Defects.

C. Friction.

D. Heat burn.

212.  Centrifugal pump works by imparting _______.

A. Potential energy.

B. Kinetic energy.

C. Heat energy.

D. Electrical energy.

213.  What is the full form of NPSH in a pump?.

214.  When the NPSH is low, it leads to ________.

A. Breaking.

B. Wear.

C. Corrosion.

D. Cavitation.

215.  Wear of impeller can be worsened by __________.

A. Draft tube.

B. Pump pressure.

C. Suspended solenoids.

216.  Which pump is the most efficient centrifugal pump?.

A. Electrical pump.

B. Reciprocating pump.

C. Heat pump.

D. Pressure pump.

217.  Corrosion in the pump is developed due to _______.

A. Pressure of air.

B. Fluid properties.

C. Draft tube.

D. Tank dimensions.

218.  Over heating is a major problem faced in a pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

219.  What is the effect of cavitation in boat propeller?.

A. It recirculates air.

B. The pressurizes the air.

C. It leads to fast spinning.

D. It breaks the bubbles.

220.  Lack of prime is a problem faced in centrifugal pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

221.  The energy usage of a pump is determined by _______.

B. Power required.

D. Isentropic expansion.

222.  For an oil field to have solid control, it needs _______.

A. Draft tubes.

B. Throttle bush.

C. Stuffing box.

D. Centrifugal pumps.

223.  If we lower the temperature, the water pump cavitation ________.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

224.  Which among the following is not a centrifugal pump?.

A. Sand pumps.

B. Froth pumps.

C. Slurry pumps.

D. Energy pumps.

225.  Centrifugal pumps work under the same principle, but differ in their _______.

A. Working.

B. Functions.

C. Dimensions.

D. Impeller.

226.  If we raise the liquid level in the suction vessel, cavitation ______.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

227.  Magnetic coupled pumps are also called as _________.

A. Series pumps.

B. Parallel pumps.

C. Froth pumps.

D. Drive pumps.

228.  Magnetic coupled pumps works via ________.

A. Antiferromagnet.

B. Drive magnet.

C. Pump magnet.

D. Ferromagnet.

229.  When we change the pump, the cavitation ______.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

230.  If we reduce the motor rpm in an impeller, cavitation _______.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

231.  Decreasing the diameter of the eye of the impeller, cavitation _________.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

232.  No gland is needed for the centrifugal pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

233.  Pump is always supported by bearings..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

234.  If we use an impeller inducer, we can reduce the cavitation in a centrifugal pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

235.  There will be leakage only if there is ________.

A. High pressure.

B. High temperature.

C. Froths are generated.

D. Casing breakage.

236.  When a pump casing is filled with liquid before it is started, it is called as _________.

B. Priming.

D. Isentropic expansion.

237.  The pump will become incapable of pumping in case of _______.

A. Gas bounding.

B. Throttle bush.

C. Stuffing box.

D. Casing breakage.

238.  Priming is needed when impeller cannot impart enough _________.

A. Draft speed.

B. Energy.

C. Pressure.

D. Heat.

239.  Priming performs response using ________.

A. Stimulus.

B. Froth.

C. Slurry.

D. Heat.

240.  To avoid gas bounding, the pump is _________.

A. Heated.

B. Elevated.

C. Primed.

D. Charged.

241.  Centrifugal pumps are located ________ the level of source.

A. Below.

B. Above.

C. Parallel with.

D. Series with.

242.  A pump that can evacuate air is called as _________.

A. Series pumps.

B. Self priming pumps.

C. Froth pumps.

D. Drive pumps.

243.  What does CPO stand for?.

A. Centrifugal pump operation.

B. Centrifugal part operation.

C. Centrifugal pump output.

D. Centrifugal part output.

244.  Self priming pumps overshadow the function of __________.

A. Self auxiliary device.

B. Wear rate.

C. Corrosion device.

D. Cavitation device.

245.  What is necessary for self priming to take place?.

A. Draft tube.

B. Pump casing.

C. Suspended solenoids.

246.  Centrifugal pumps with an internal suction stage are called as _________.

A. Series pumps.

B. Self priming pumps.

C. Froth pumps.

D. Drive pumps.

247.  Two phase mixture is pumped unit the suction line is evacuated..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

248.  During normal working operation, the pump works like __________.

A. Centrifugal pumps.

B. Self priming pumps.

C. Froth pumps.

D. Drive pumps.

249.  The pump function that works on rinsing is called as dialysis of pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

250.  What is purpose of vent valve in a pump?.

A. High pressure control.

B. High temperature control.

C. Froths are generated can be minimized.

D. To prevent siphon action.

Answer = To prevent siphon action

251.  In hydraulic head, NPSH is used for the analysis of __________.

B. Priming.

C. Wear.

D. Cavitation.

252.  NPSH is the difference between _______.

A. Suction pressure and vapour pressure.

B. Vapour pressure and suction pressure.

C. Suction pressure and heat.

Answer = Suction pressure and vapour pressure

253.  What can NPSH be used to determine _______.

A. Friction characteristics.

B. Pipe diameter.

C. Cavitation.

D. Thermal expansion.

254.  The measure of how close the fluid is to the given point is called _________.

A. Flashing.

B. Darcy’s factor.

C. Transfer temperature.

D. Heizenberg’s factor.

255.  What is the dimension for Darcy’s friction factor?.

A. kg/m.

B. N/mm.

C. kg.

D. Dimensionless.

256.  NPSH is relevant ________.

A. Outside the pumps.

B. Inside the pumps.

C. Away from the pumps.

D. Series and parallel with the pumps.

257.  With the increase in cavitation, the drag coefficient of the impeller ______.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

258.  What is the full form of NPSH in a pump?.

259.  When the NPSH is low, it leads to ________.

A. Breaking.

B. Wear.

C. Corrosion.

D. Cavitation.

260.  What is positive suction head?.

A. Draft tube is above.

B. Pump pressure is above.

C. Liquid level is above.

Answer = Liquid level is above

261.  NPSHr is determined by using ______.

A. Pump pressure.

B. PumpLinx.

C. Heat transfer.

D. Chemical energy.

262.  Corrosion in the pump is developed due to _______.

A. Pressure of air.

B. Fluid properties.

C. Draft tube.

D. Tank dimensions.

263.  Calculation of NPSH in a turbine is different from the calculation of NPSH in a pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

264.  If we use two lower capacity pumps in parallel, cavitation ________.

A. Increases.

B. Decreases.

C. Same.

D. Independent.

265.  Vapour pressure is strongly dependent on temperature in a pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

266.  Reciprocating pump is a ________.

A. Negative displacement pump.

B. Positive displacement pump.

C. Diaphragm pump.

D. Emulsion pump.

267.  What happens to the reciprocating pump when left untouched?.

A. Efficiency decreases.

B. Wear and tear.

C. Surface expansion.

D. Pressure change.

268.  Reciprocating pumps operate by drawing ______ into the chamber.

A. Liquid.

B. Pressure.

C. Heat.

D. Electricity.

269.  The cylinder of reciprocating cylinder is made up of _______.

A. Cast iron.

B. Wrought iron.

C. Aluminium.

D. Copper.

270.  The higher discharge valve line holds the discharge valve ________.

A. Open.

B. Closed.

C. Stop functioning.

D. Automatic.

271.  Reciprocating pumps are also called as __________.

A. Force pumps.

B. Mass Pumps.

C. Heat pumps.

D. Speed pumps.

272.  Reciprocating pumps are classified according to ___________.

A. Drag force.

B. Number of cylinders.

C. Shock waves.

D. Flow speed.

273.  Simple hand operating pump is also called as ______.

A. Froth pump.

B. Bicycle pump.

C. Multistage pumps.

D. Centrifugal pumps.

274.  Internal cavitation in reciprocating pumps occurs due to __________.

A. Drag force.

B. Cyclic stress.

C. Shock waves.

D. Flow speed.

275.  Bicycle pump generates more compression than volume displacement..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

276.  Power operated pump in which only one side engages the fluid displacement is called _______.

A. Froth pump.

B. Single acting.

C. Double acting.

D. Bicycle pump.

277.  Operation of reciprocating motion is done by a ________ source.

A. Power.

B. Energy.

C. Momentum.

D. Inertia.

278.  An up and down back and forth relative linear motion is called __________.

A. Reciprocation.

B. Rotation.

C. Filtration.

D. Excavation.

279.  Power operated pump in which only both sides engage the fluid displacement is called _____.

A. Froth pump.

B. Single acting.

C. Double acting.

D. Bicycle pump.

280.  High pressure reciprocating pumps are generally from 1500 HP..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

281.  How many number of valves are required for the rotary pump?.

A. 0.0.

B. 1.0.

C. 2.0.

D. 3.0.

282.  Reciprocating pump is divided into how many types, based on its cylinders?.

A. 0.0.

B. 5.0.

C. 2.0.

D. 3.0.

283.  At each stage the fluid is directed ________.

A. Towards the centre.

B. Away the centre.

C. Towards the surface.

D. Away from the centre.

284.  The maximum efficiency of the reciprocating pump is _________.

A. 20.0.

B. 50.0.

C. 70.0.

D. 85.0.

285.  The two opposite motion that comprise a single reciprocation is called _________.

A. Turbocharger.

B. Stokes.

C. Fluid motion.

D. Auto motion.

286.  Reciprocating pumps has ____ efficiency compared to centrifugal pumps.

A. Higher.

B. Lower.

C. Equal.

D. Exponential.

287.  Reciprocating pumps works on the principle of __________.

A. Drag force.

B. Liquid flow push.

C. Shock waves.

D. Flow speed.

288.  Reciprocating pump is a type of ___________.

A. Positive displacement pump.

B. Bicycle pump.

C. Multistage pumps.

D. Centrifugal pumps.

289.  During the suction stroke the _______ moves left thus creating vacuum in the Cylinder..

A. Piston.

B. Cylinder.

C. Valve.

D. Pump.

290.  In reciprocating pumps, the chamber in which the liquid is trapped is a stationary cylinder that contains piston or cylinder.

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

291.  Reciprocating pump works like a positive displacement pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

292.  When both the sources are effective it is called as __________.

A. Double acting pump.

B. Single acting pump.

C. Triple acting pump.

D. Normal pump.

293.  A repetitive variation about the central value of equilibrium is called ________.

A. Reciprocation.

B. Oscillation.

C. Filtration.

D. Excavation.

294.  A linear wheel turning motion is called as a ________.

A. Reciprocation.

B. Rotation.

C. Oscillation.

D. Bicycle pump.

295.  A reciprocating pump that has 1200 crank is _________.

A. Froth pump.

B. Single acting.

C. Double acting.

D. Triple acting.

296.  In a positive displacement pump, what gets displaced?.

A. Fluid.

B. Volume.

C. Pressure.

D. Temperature.

297.  What happens to the reciprocating pump when left untouched?.

A. Efficiency decreases.

B. Wear and tear.

C. Surface expansion.

D. Pressure change.

298.  Positive displacement pumps are capable of developing ______ pressures, in _______ suction pressure..

A. High, low.

B. Low, high.

C. High, high.

D. Low, low.

299.  When is a reciprocating pump used?.

A. When quantity of liquid is small.

B. When quantity of liquid is large.

C. To pump high pressure.

D. To pump low pressure.

Answer = When quantity of liquid is small

300.  Positive displacement pumps are also called as__________.

A. Constant pressure pump.

B. Pressure drag pumps.

C. Constant volume pumps.

301.  At high pressure, the voids can generate ______.

A. Drag force.

B. Mass density.

C. Shock waves.

D. Flow speed.

302.  In centrifugal pumps, their capacity is affected due to___________.

A. Drag force.

B. Cyclic stress.

C. Shock waves.

D. Pressure.

303.  A quantity of fluid that leaks from a higher pressure discharge to a lower pressure discharge is called______.

A. Slip.

B. Heat.

C. Friction.

D. Enthalpy.

304.  Positive displacement pumps regulate the flow by varying its ________.

A. Drag force.

B. Cyclic stress.

C. Shock waves.

D. Flow speed.

305.  Positive displacement pumps are divided into two types..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

306.  Centrifugal pump is less efficient than a reciprocating pump because of its _______.

A. Temperature.

B. Speed.

C. Heat.

D. Cost.

307.  Simplest example of single acting reciprocating pump is _______.

A. Mineral ores.

B. Whirl wheels.

C. Bicycle tires.

D. Syringe.

308.  Rotary pumps do not function well under _______.

A. High Vaporisation.

B. High Sedimentation.

C. High viscosity.

D. Excavation.

309.  The parameter that disturbs the working of the rotary pump is______.

A. High Vaporisation.

B. High Sedimentation.

C. Low flow rate.

D. Excavation.

310.  In a double acting reciprocating pump, the piston carries suction and expulsion at the same time..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

311.  Rotary pumps are commonly used to circulate________.

A. Lube oils.

B. Petroleum.

C. Diesel.

D. Water.

312.  Reciprocating pump is divided into how many types, based on its cylinders?.

A. 0.0.

B. 5.0.

C. 2.0.

D. 3.0.

313.  How many number of valves are required for the rotary pump?.

A. 0.0.

B. 1.0.

C. 2.0.

D. 3.0.

314.  Capacity of a rotary pump is defined as _________.

A. Total liquid displaced.

B. Overall performance of pump.

C. Maximum fluid flow.

D. Minimum fluid flow.

315.  The pump that converts mechanical energy into hydraulic energy is called as _________.

A. Turbomachinery.

B. Centrifugal pump.

C. Aerodynamics.

D. Auto pump.

316.  What type of flow does the reciprocating pump have?.

A. Uniform.

B. Continuous.

C. Pulsating.

D. Non-uniform.

317.  What is the full form of PD?.

A. Positive displacement.

B. Pump displacement.

C. Plunger displacement.

D. Plunger direct.

318.  Why can’t rotary pumps non-lubricate water?.

A. Because it has lesser viscosity.

B. Because it contains abrasive particles.

C. Multistage pumps are difficult to operate.

D. Draft tube is thin.

Answer = Because it contains abrasive particles

319.  The maximum speed of reciprocating pump is __________.

A. 20m/min.

B. 30m/min.

C. 40m/min.

D. 50m/min.

320.  Pumps require clearances because of machining tolerances or wear exhibits larger slip..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

321.  The pump that uses a relatively smaller amount of liquid is called ________.

A. Froth pump.

B. Reciprocating pump.

C. Double acting.

D. Bicycle pump.

322.  Sliding vanes in pumps are held by ________.

A. Draft pins.

B. Whirl wheels.

C. Springs.

D. Nails.

323.  Air vessel accumulates excess quantity of ______.

A. Vapor.

B. Water.

C. Heat.

D. Pressure.

324.  In which pump is the liquid in contact with both the sides of the plunger_____.

A. Froth pump.

B. Single acting.

C. Double acting.

D. Bicycle pump.

325.  The sliding vane is capable of delivering medium capacity and heat..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

326.  When a cylinder has inlet and outlet ports at each end, then it is called as __________.

A. Double acting.

B. Air lift pumps.

C. Reciprocating pumps.

D. Centrifugal pumps.

327.  Turbomachines work under ________.

A. Newtons first law.

B. Newtons second law.

C. Newtons third law.

D. Kepler’s law.

328.  The main function of nozzle is to __________.

A. Varying temperatures.

B. Pressure variations.

D. Heat variations.

329.  When the piston moves forward, liquid is drawn ________.

A. Into the cylinder.

B. Away from the cylinder.

C. Into the draft tube.

D. Away from the draft tube.

330.  The pump injects compressed air at the _________.

A. Rotor pipe.

B. Bottom of the discharge pipe.

C. Top of the discharge pipe.

D. Rotor to draft.

Answer = Bottom of the discharge pipe

331.  In a reciprocating pump, with the change in discharge pressure, ________.

A. The Volume delivered increases.

B. The volume delivered decreases.

C. Volume delivered remains the same.

D. Volume delivered is independent.

Answer = Volume delivered remains the same

332.  The compressed air mixes with the liquid casing to become less dense..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

333.  The amount of fluid that leaks internally is called ________.

B. Slip.

C. Tail race.

D. Internal friction.

334.  Airlift pumps are widely used in aquaculture to pump..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

335.  Centrifugal pumps are used to transport ________.

A. Pressure.

B. Speed.

C. Power.

D. Fluid.

336.  For a good condition, slip should be________.

A. Below 1 percent.

B. 1 to 2 percent.

C. 3 to 4 percent.

D. Above 5 percent.

337.  If the slip is above 5 percent, the pumps needs to be ______.

A. Dragged.

B. Overhauled.

C. Retracted.

D. Intermittent.

338.  The rotational kinetic energy comes from ______.

A. Engine motor.

B. Pump.

C. Tank.

D. Draft tube.

339.  When the balancing of the turbine is disturbed, we use ________.

A. Throttle governing.

B. Steam governing.

C. Nozzle governing.

D. Emergency governing.

340.  Slip in a pump depends on which of following parameters?.

A. Wear.

B. Pressure.

C. Temperature.

D. Heat.

341.  A pressure vessel is used to hold _______.

A. Air.

B. Gases.

C. Molecules.

D. Solids.

342.  Why do we need a maximum safe operating pressure?.

A. Pressure vessel might explode.

B. Temperature increase needs to be controlled.

C. Heat transfer is rejected.

D. Improve overall efficiency.

Answer = Pressure vessel might explode

343.  When is a reciprocating pump used?.

A. When quantity of liquid is small.

B. When quantity of liquid is large.

C. To pump high pressure.

D. To pump low pressure.

Answer = When quantity of liquid is small

344.  The maximum efficiency of the reciprocating pump is _________.

A. 20.0.

B. 50.0.

C. 70.0.

D. 85.0.

345.  A tank that is used to protect closed water heating systems is called ________.

A. Pressure vessel.

B. Expansion vessel.

C. Heat vessel.

D. Auto vessel.

346.  How is the construction of the vessel tested?.

A. Uniform testing.

B. Continuous testing.

C. Pulsating test.

D. Non-destructive testing.

347.  What does BPVC stand for?.

A. Boiler and pressure vessel code.

B. Boiler and pump vessel code.

C. Boiler and pressure vessel clutch.

D. Boiler and pump vessel clutch.

Answer = Boiler and pressure vessel code

348.  Which of the following is not an NDT type?.

A. Ultrasonic.

B. Liquid penetrant.

C. Visual.

D. Hammer test.

349.  What is the full form of NDI?.

A. Non-destructive intern.

B. Non-destructive inspection.

C. Non-destructive inkling.

D. Non-destructive inertia.

350.  NDT is a money and time saving technique..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

351.  Where is the excess quantity of water from the pump accumulated?.

A. Froth tube.

B. Draft tube.

C. Air vessels.

D. Bicycle pump.

352.  NDT relies upon _________.

B. Heat.

C. Pressure change.

D. Temperature.

353.  What is the shape of a pressure vessel?.

A. Square.

B. Spheres.

C. Cones.

D. All the shapes.

354.  Safety valve is used to ensure that the pressure in the vessels is not exceeded..

A. TRUE.

B. FALSE.

C. Nothing can be said.

D. None of the mentioned.

355.  Pressure vessel closures are used to _________.

A. Avoid breakage.

B. Avoid leakage.

C. Retain structures.

D. Maintain pressure.

356.  The hydraulic press is also known as _________ press.

A. Pascal.

B. Toricelli.

C. Bernouille.

D. Bramah.

357.  The underlying principle behind a hydraulic press is based on ______ principle.

A. Bramah’s.

B. Pascal’s.

C. Stoke’s.

D. Newton’s.

358.  In a hydraulic press, the pump acts as a _________.

A. Piston.

B. Motor.

C. Tubing.

D. Cylinder.

359.  A hydraulic press makes use of a _________.

A. hydraulic pump.

B. hydraulic cylinder.

C. hydraulic accumulator.

D. hydraulic shaft.

360.  In a hydraulic press, the metal can be _______.

A. Crushed.

B. Straightened.

C. Molded.

D. Crushes, straightened and molded.

Answer = Crushes, straightened and molded

361.  The cylinder with the smaller diameter Is called _________.

A. Slave cylinder.

B. Master cylinder.

C. Working cylinder.

D. Casting Cylinder.

362.  A ________ is the main essence of a car crushing system..

A. hydraulic press.

B. hydraulic cylinder.

C. hydraulic crane.

D. accumulator.

363.  The cylinder having the larger diameter is called _______ cylinder..

A. Slave.

B. Master.

C. Cage.

D. Pump.

364.  A ________ is a storage reservoir under pressure where a liquid is held under pressure..

A. Hydraulic accumulator.

B. Hydraulic crane.

C. Hydraulic gear.

D. Hydraulic pump.

365.  The most frequently used accumulator type is ________.

A. Liquid accumulator.

B. Solid accumulator.

C. Compressed gas accumulator.

D. Plasma accumulator..

366.  The first accumulators for Armstrong’s hydraulic dock machinery were ________ which is placed raised..

A. oil towers.

B. gas towers.

C. water towers.

D. plasma towers.

367.  ________ is the simplest form of an accumulator..

A. air filled.

B. oil filled.

C. water filled.

D. gas filled.

368.  ________ invented the compressed air accumulator..

A. Reynold.

B. Braman.

C. Pascal.

D. Jean Mercier.

369.  The inert gas used in gas compressed accumulator is usually _______.

A. Sulphur.

B. Nitrogen.

C. Oxygen.

D. Carbon dioxide.

370.  Spring type accumulator works on the principle of ______.

A. Bernouille’s law.

B. Charles’ law.

C. Hooke’s law3.

D. Pascal’s law.

371.  A __________ is a hydraulic machine for converting hydraulic power at low pressure into a reduced volume at higher pressure..

A. Hydraulic Ram.

B. Hydraulic crane.

C. Hydraulic Intensifier.

D. Hydraulic accumulator.

372.  If the diameters of the two pistons used in the arrangement are different, the _______ in each cylinder will vary..

A. Hydraulic velocities.

B. Hydraulic acceleration.

C. Hydraulic pressure.

D. Hydraulic force.

373.  The working volume of the intensifier is restricted by the stroke of the ________.

A. Piston.

B. Shaft.

C. Jack.

D. Cylinder.

374.  Intensifiers are employed as a part of machines such as ________.

A. Hydraulic presses.

B. Hydraulic Crane.

C. Hydraulic accumulator.

D. Hydraulic Ram.

375.  Small intensifiers usually have a ________ in their basic system..

A. Stepped piston.

B. Stepped cylinder.

C. Accumulator.

D. Stepped presses.

376.  Most commonly used hydraulic intensifier for water jet cutting is _________.

A. Inline hydraulic intensifier.

B. Parallel hydraulic intensifier.

C. Pressed hydraulic intensifier.

D. Casting hydraulic intensifier.

377.  When the intensifier is placed outside its jack, it produces higher ________.

A. Pressure.

B. Force.

C. Displacement.

D. Momentum.

378.  A ________ is a cyclic water pump that derives its power from hydroelectric sources..

A. Hydraulic crane.

B. Hydraulic Ram.

C. Hydraulic Accumulator.

D. Hydraulic presses.

379.  A hydraulic ram uses the _______ effect to develop pressure..

A. Water hammer.

B. Pascal’s law.

C. Bernouille’s.

D. Toricelli’s.

380.  Hydraulic Ram is used in areas where there is a source of ________ power..

A. Thermal.

B. Hydroelectric.

C. Biogas.

D. Solar.

381.  The typical efficiency of a hydraulic ram is ____.

A. 0.5.

B. 0.6.

C. 0.7.

D. 0.8.

382.  _______ aids in cushioning the shock of the hydraulic pressure during the working of the hydraulic ram.

A. Pressure vessel.

B. air bags.

C. inlet valve.

D. Drive pipe.

383.  ___________ restricts the dissolution of the pressurized air into the water..

A. Elastic diaphragm.

B. Pressure vessel.

C. Inlet pipe.

D. Waste valve.

384.  One of the main reasons why the cycling stops in the hydraulic ram is due to poor adjustment of ________.

A. pressure vessel.

B. diaphragm.

C. waste valve.

D. water hammer.

385.  An alternate option to the hydraulic ram is _________.

A. water-powered pump.

B. Oscillating pump.

C. Inlet pressure pump.

D. Water vessel pump.

386.  In a hydraulic lift ______ is fixed on the crown of the sliding ram where the carried load is located..

A. Cage.

B. Wire rope.

C. Pulleys.

D. Jiggers.

387.  When fluid is subjected to _______ it is pushed into the cylindrical chamber which gives the ram gets a push in the upward direction..

A. Pressure.

B. Force.

C. Momentum.

D. Acceleration.

388.  ______ is attached to the fixed cylindrical chamber which moves in the upward or downward direction..

A. Jiggers.

B. Sliding Ram.

C. Crown.

D. Pulley.

389.  The two types of pulleys in a hydraulic lift are ______ and ______.

A. fixed, fixed.

B. movable, fixed.

C. movable, movable.

D. semi-movable, movable.

390.  _________ is attached to the wall of the floor, where the sliding ram moves upwards or downwards depending on how the pressure is applied..

A. Cage.

B. Fixed cylinder.

C. Pulleys.

D. shaft.

391.  Working period is defined as the ratio of the height of lift to the ___________.

A. acceleration of the lift.

B. pressure of the lift.

C. velocity of the lift.

D. displacement of the lift..

Answer = velocity of the lift

392.  Idle period of lift is defined as the difference of the total time taken for one operation and the _____ of the lift..

A. Working period.

B. Stationary period.

C. Active period.

D. Passive period.

393.  Due to the arrangement of hydraulic jigger; the ________ rotates.

A. Fixed cylinder.

B. Sliding contact.

C. Fluid.

D. Pulley.

394.  In a hydraulic system the development of pressure is by variable displacement pump and _____.

A. stationary pump.

B. fixed pump.

C. gear pump.

D. motor pump.

395.  In a hydraulic crane, _____ is the component mainly responsible for lifting..

A. Boom.

B. Counter-weights.

C. Jib.

D. Rotex Gear.

396.  ________ helps in indicating the maximum lifting limit of the crane..

A. Jib.

B. Gear.

C. Shaft.

397.  Out of the ____ , a lattice structure called jib projects out..

A. Boom.

B. Pump.

C. Gear.

D. Out-triggers.

398.  ________ allows the rotation of the boom..

A. Rotex gear.

B. Jib.

C. Motor.

D. Pump.

399.  _______ restricts the crane from tipping.

A. Gear.

B. Indicator.

C. Counterweights3.

D. Boom.

400.  The pressure generated by a counterweight gear pump is ______.

A. 1200 psi.

B. 1300 psi.

C. 1400 psi.

D. 1500 psi.

401.  A pump that has low suction and moderate discharge is called _______.

A. Froth pumps.

B. Air lift pumps.

C. Reciprocating pumps.

D. Centrifugal pumps.

402.  Turbomachines work under ________.

A. Newtons first law.

B. Newtons second law.

C. Newtons third law.

D. Kepler’s law.