Fluid Mechanics MCQ Questions & Answers

21

Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation?
1. Fluid flow is frictionless & irrotational
2. Fluid flow is steady
3. Fluid flow is uniform & turbulent
4. Fluid is compressible
5. Fluid is incompressible

A) 1, 3, 4 B) 2, 4, 5 C) 1, 2, 5 D) 1, 4, 5

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Answer & Solution

Answer: Option C

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22

For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is

A) 1 B) 0 C) < 1 D) > 1

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Answer & Solution

Answer: Option C

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23

Sewage sludge is __________ type of non-Newtonion fluid.

A) Dilatant B) Bingham plastic C) Pseudo plastic D) None of these

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Answer & Solution

Answer: Option B

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24

__________ pumps are axial flow pumps.

A) Turbine B) Propeller C) Diffuser D) None of these

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Answer & Solution

Answer: Option B

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25

Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.

A) Increase B) Decrease C) Not change D) Exponentially decrease

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Answer & Solution

Answer: Option A

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26

The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is _________ the mean velocity of flow.

A) Directly proportional to B) Directly proportional to square of C) Inversely proportional to D) Inversely proportional to square of

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Answer & Solution

Answer: Option B

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27

A pitched-blade turbine draws __________ a straight blade turbine.

A) Less power than B) More power than C) Same power as D) Data insufficient to predict

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Answer & Solution

Answer: Option A

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28

Viscosity of a liquid decreases __________ with rise in temperature.

A) Exponentially B) Linearly C) Logarithmically D) None of these

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Answer & Solution

Answer: Option C

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29

In isotropic turbulence, the __________ are equal to each other.

A) Temporal velocity components B) Mean square of velocity fluctuations in the three co-ordinate directions C) Root mean square of velocity fluctuations in the three co-ordinate directions D) None of these

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Answer & Solution

Answer: Option B

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30

Bernoulli's equation for steady, frictionless, continuous flow states that the __________ at all sections is same.

A) Total pressure B) Total energy C) Velocity head D) None of these

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Answer & Solution

Answer: Option B

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering