# Fluid Mechanics MCQ (Multiple Choice Questions) - SchoolingAxis

1. The value of mass density in kgsecVm4 for water at 0°C is

(a) 1

(b) 1000

(c) 100

(d) 101.9

(e) 91

Ans: d

2. Property of a fluid by which its own molecules are attracted is called

(b) cohesion

(c) viscosity

(d) compressibility

(e) surface tension.

Ans: b

3. Mercury does not wet glass. This is due to property of liquid known as

(b) cohesion

(c) surface tension

(d) viscosity

(e) compressibility.

Ans: c

4. The property of a fluid which enables it to resist tensile stress is known as

(a) compressibility

(b) surface tension

(c) cohesion

(e) viscosity.

Ans: c

5. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

(b) cohesion

(c) viscosity

(d) compressibility

(e) surface tension.

Ans: a

6. The specific weight of water is 1000 kg/m”

(a) at normal pressure of 760 mm

(b) at 4°C temperature

(c) at mean sea level

(d) all the above

(e) none of the above.

Ans: d

7. Specific weight of water in S.I. units is equal to

(a) 1000 N/m3

(b) 10000 N/m3

(c) 9.81 x lO3 N/m3

(d) 9.81 x lO6 N/m3

(e) 9.81 N/m3.

Ans: c

8. When the flow parameters at any given instant remain same at every point, then flow is said to be

(a) quasi static

(c) laminar

(d) uniform

(e) static.

Ans: d

9. Which of the following is dimensionless

(a) specific weight

(b) specific volume

(c) specific speed

(d) specific gravity

(e) specific viscosity.

Ans: d

10. The normal stress in a fluid will be constant in all directions at a point only if

(a) it is incompressible

(b) it has uniform viscosity

(c) it has zero viscosity

(d) it is frictionless

(e) it is at rest.

Ans: e