# Fluid Mechanics MCQ Questions Answers Civil Engineering

## Fluid Mechanics Civil Engineering MCQ Questions Answers

1) The liquid used in manometers should have

a) low density

b) high density

c) low surface tension

d) high surface tension

Option – a)

2) A Newtonian fluid is defined as the fluid which

(a) is highly viscous

(b) is compressible and non-viscous

(c) is incompressible and viscous

(d) obeys Newton’s law of viscocity

Option – d)

3) An ideal fluid is one which is

a) compressible

b) elastic and viscous

c) non-viscous and incompressible

d) of low density

Option – c)

4) The line that connects all particles passing through a point is known as

(a) streamline

(b) pathline

(c) streakline

(d) all the above.

Option – c)

5) For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

a) 16/Re

b) 32/Re

c) 64/Re

d) None of these

Option – c)

6) Gauge pressure is

(a) pressure measured above complete vacuum

(b) absolute pressure + local atmospheric pressure

(c) absolute pressure – local atmospheric pressure

(d) none of the above.

Option – c)

7) The pressure, in meters of oil (sp.gr.0.8) equivalent to 80 m of water is

a) 64

b) 80

c) 100

d) 88

Option – c)

8) A venturimeter is having a exit cone of

(a) diverging angle 20°

(b) diverging angle of 5° to 7°

(c) converging angle of 20°

(d) converging angle of 5° to 7°

Option – b)

9) Pressure of 200 kPa is equivalent to a head of h metres of carbon tetrachloride of relative density 1.59 where h is equal to

a) 11.62

b) 11.92

c) 12.82

d) 13.12

Option – c)

10) The nominal thickness of boundary layer may be considered the distance between the solid

boundary and the layer where the velocity of fluid particles is ______ of free stream velocity.

(a) 90%

(b) 95%

(c) 99%

(d) 100%