Fluid Mechanics MCQ Questions & Answers

21

A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is __________ kg.

A) 10 B) 100 C) 1000 D) 10000

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Answer & Solution

Answer: Option B

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22

The rate of change of moment of momentum represents the __________ by the fluid.

A) Torque applied B) Force exerted C) Work done D) Power developed

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Answer & Solution

Answer: Option A

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23

Venturimeter and orificemeter measures the __________ of the fluid.

A) Pressure B) Maximum velocity C) Average velocity D) Point velocity

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Answer & Solution

Answer: Option C

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24

Each term in Bernaulli's equation represents the __________ of the fluid.

A) Energy per unit mass B) Energy per unit weight C) Force per unit mass D) None of these

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Answer & Solution

Answer: Option B

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25

Drag force on the float of a rotameter is (where, Q = flow rate of the fluid)

A) $$ \propto {\text{Q}}$$ B) $$ \propto \sqrt {\text{Q}} $$ C) $$ \propto {{\text{Q}}^2}$$ D) Constant

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Answer & Solution

Answer: Option D

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26

Which of the following facilitates close control of flow of fluids?

A) Gate valve B) Globe valve C) Butterfly valve D) Check valve

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Answer & Solution

Answer: Option B

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27

In area meter (e.g., rotameter), with increase in the fluid flow rate, the

A) Pressure drop increases linearly B) Pressure drop is almost constant C) Area through which fluid flows does not vary D) None of these

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Answer & Solution

Answer: Option B

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28

Hydraulic radius of 6" × 12" cross-section, is __________ inches.

A) 2 B) 0.5 C) 1.5 D) None of these

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Answer & Solution

Answer: Option A

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29

In case of a __________ the energy of flow is considerably decreased downstream of the machine.

A) Blower B) Turbine C) Centrifugal pump D) Centrifugal fan

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Answer & Solution

Answer: Option B

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30

Select the correct statement.

A) The discharge through a venturimeter depends upon Δp only and is independent of orientation of the meter B) A venturimeter with a given gage difference discharges at a greater rate, when the flow is vertically downward through it, than when the flow is vertically upward C) For a given pressure difference, the discharge of gas is greater through a venturimeter, when compressibility is taken into account, than when it is neglected D) The overall pressure loss is the same in a given pipe line, whether a venturimeter or a nozzle with the same throat dia is used

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Answer & Solution

Answer: Option A

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering