Fluid Mechanics MCQ Questions & Answers

31

A mono pump is a __________ pump.

A) Centrifugal B) Piston C) Positive acting rotary D) A group of vacuum

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Answer & Solution

Answer: Option C

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32

For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by

A) $$\frac{{\partial {\text{u}}}}{{\partial {\text{x}}}} = 0$$ B) $$\frac{{\partial \left( {\rho {\text{u}}} \right)}}{{\partial {\text{x}}}} = 0$$ C) $$\frac{{\partial {\text{u}}}}{{\partial {\text{x}}}} = - \frac{{\partial \rho }}{{\partial {\text{t}}}}$$ D) $$\frac{{\partial \rho }}{{\partial {\text{t}}}} = 0$$

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Answer & Solution

Answer: Option A

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33

Velocity head on sudden enlargement in a horizontal pipe is converted into __________ head.

A) Elevation B) Pressure C) Both A and B D) Neither A nor B

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Answer & Solution

Answer: Option B

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34

Diaphragm valves are used for handling __________ fluids.

A) Corrosive B) Viscous C) Non-Newtonion D) Solid suspended

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Answer & Solution

Answer: Option A

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35

Pick out the wrong statement:

A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer B) Blowers develop a maximum pressure of 2 atmospheres C) Friction losses in pipe fittings are generally expressed in terms of velocity heads D) Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number

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Answer & Solution

Answer: Option C

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36

The velocity for subsonic flow in a pipeline

A) Increases in the downstream direction B) Is constant C) Decreases in the downstream direction D) Is independent of the area of flow

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Answer & Solution

Answer: Option A

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37

What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)?

A) 0.61 - 0.63 B) 0.5 - 0.75 C) 0.75 - 0.90 D) 0.35 - 0.55

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Answer & Solution

Answer: Option A

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38

The pump used for irrigation purposes is generally designed for

A) Large capacity & high head B) Large capacity & low head C) Small capacity & high head D) Small capacity & low head

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Answer & Solution

Answer: Option B

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39

Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss?

A) Flow nozzle B) Venturimeter C) Rotameter D) Orificemeter

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Answer & Solution

Answer: Option B

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40

Open channel liquid flow is most conveniently measured by a

A) Hot wire anemometer B) Notch C) Rotameter D) Segmental orifice

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Answer & Solution

Answer: Option B

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering