# Fluid Mechanics MCQ (Multiple Choice Questions) - SchoolingAxis

1. The continuity equation

pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid

b) uniform flow

c) incompressible flow

d) frictionless flow

where pi and p2 are mass densities.

Ans: a

2. Which of the following velocity potentials satisfies continuity equation ?

a) x2y

b) x2-y2

c) cosx

d) x2 + y2

Ans: b

3. The motion of air mass in a tornado is a

a) free vortex motion

b) forced vortex motion

c) free vortex at center and forced vortex outside

d) forced vortex at center and free vortex outside

Ans: d

4. In a forced vortex motion, the velocity of flow is

a) directly proportional to its radial distance from axis of rotation

b) inversely proportional to its radial distance from the axis of rotation

c) inversely proportional to the square of its radial distance from the axis of rotation

d) directly proportional to the square of its radial distance from the axis of rotation

Ans: a

5. Stream lines and path lines always coincide in case of

b) laminar flow

c) uniform flow

d) turbulent flow

Ans: a

6. Equation of continuity is based on the principle of conservation of

a) mass

b) energy

c) momentum

d) none of the above

Ans: a

7. In steady flow of a fluid, the total accele ration of any fluid particle

a) can be zero

b) is never zero

c) is always zero

d) is independent of coordinates

Ans: a

8. The pitot tube is used to measure

a) velocity at stagnation point

b) stagnation pressure

c) static pressure

d) dynamic pressure

Ans: b

9. Hot wire anemometer is used to measure

a) discharge

b) velocity of gas

c) pressure intensity of gas

d) pressure intensity of liquid

Ans: b

10. The theoretical value of coefficient of contraction of a sharp edged orifice is

a) 0.611

b) 0.85

c) 0.98

d) 1.00

Ans: a