Hydraulics And Fluid Mechanics MCQ Questions & Answers

71

Flow at constant rate through a tapering pipe is
i) steady flow
ii) uniform flow
iii) unsteady flow
iv) non-uniform flow
The correct answer is

A) (i) and (ii) B) (i) and (iv) C) (ii) and (iii) D) (ii) and (iv)

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Answer & Solution

Answer: Option B

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72

Drag force is a function of
i) projected area of the body
ii) mass density of the fluid
iii) velocity of the body
The correct answer is

A) (i) and (ii) B) (i) and (iii) C) (ii) and (iii) D) (i), (ii) and (iii)

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Answer & Solution

Answer: Option D

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73

The increase in meta centric height
i) increases stability
ii) decreases stability
iii) increases comfort for passengers
iv) decreases comfort for passengers
The correct answer is

A) (i) and (iii) B) (i) and (iv) C) (ii) and (iii) D) (ii) and (iv)

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Answer & Solution

Answer: Option B

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74

Select the correct statement

A) Local atmospheric pressure depends upon elevation of locality only B) Standard atmospheric pressure is the mean local atmospheric pressure at sea level C) Local atmospheric pressure is always below standard atmospheric pressure D) A barometer reads the difference be-tween local and standard atmospheric pressure

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Answer & Solution

Answer: Option B

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75

Least possible value of correction factor for
i) kinetic energy is zero
ii) kinetic energy is 1
iii) momentum is zero
iv) momentum is 1
The correct statements are

A) (i) and (iii) B) (ii) and (iii) C) (i) and (iv) D) (ii) and (iv)

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Answer & Solution

Answer: Option D

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76

Choose the wrong statement

A) fluids are capable of flowing B) fluids conform to the shape of the con-taining vessels C) when in equilibrium, fluids cannot sustain tangential forces D) when in equilibrium, fluids can sustain shear forces

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Answer & Solution

Answer: Option D

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77

For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

A) directly proportional to Reynolds number and independent of pipe wall roughness B) directly proportional to pipe wall roughness and independent of Reynolds number C) inversely proportional to Reynolds number and indpendent of pipe wall roughness D) inversely proportional to Reynolds number and directly proportional to pipe wall roughness

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Answer & Solution

Answer: Option C

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78

The flow which neglects changes in a transverse direction is known as

A) one dimensional flow B) uniform flow C) steady flow D) turbulent flow

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Answer & Solution

Answer: Option A

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79

For measuring flow by a venturimeter, if should be installed in

A) vertical line B) horizontal line C) inclined line with upward flow D) in any direction and in any location.

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Answer & Solution

Answer: Option D

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80

Which of the following instrument can be used for measuring speed of an aeroplane

A) Venturimeter B) Orifice plate C) rotameter D) pitot tube

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Answer & Solution

Answer: Option D

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Hydraulics And Fluid Mechanics MCQ Questions & Answers | Civil Engineering