Fluid Mechanics MCQ Questions & Answers

1

The capillary rise of mercury is maximum in glass tube of dia __________ mm.

A) 0.5 B) 1 C) 2 D) 5

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Answer & Solution

Answer: Option A

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2

The pitot static tube does not measure the __________ pressure.

A) Static B) Total C) Difference in static & dynamic D) All of the above

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Answer & Solution

Answer: Option D

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3

Manometers measure the __________ pressure.

A) Vacuum as well as the atmospheric B) Difference in C) Absolute D) Gage

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Answer & Solution

Answer: Option B

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4

Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft.

A) 40 B) 34 C) 8 D) 37

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Answer & Solution

Answer: Option C

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5

At high Reynolds number

A) Inertial forces control and viscous forces are unimportant B) Viscous forces predominate C) Inertial forces are unimportant and viscous forces control D) None of these

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Answer & Solution

Answer: Option A

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6

At low Reynolds number

A) Viscous forces are unimportant B) Viscous forces control C) Viscous forces control and inertial forces are unimportant D) Gravity forces control

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Answer & Solution

Answer: Option C

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7

Viscosity of water is about __________ times that of air at room temperature.

A) 15 B) 55 C) 155 D) 1050

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Answer & Solution

Answer: Option B

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8

The most important factor, which determines the maximum height to which water can be lifted by a pump at standard temperature is the

A) Barometric pressure B) Speed of the impeller C) Diameter of the impeller D) Both B and C

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Answer & Solution

Answer: Option A

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9

Euler's equation of motion states, that at every point, the

A) Fluid momentum is constant B) Force per unit mass equals acceleration C) Rate of mass outflow is equal to the rate of mass inflow D) None of these

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Answer & Solution

Answer: Option B

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10

The buoyant force acting on a floating body is dependent on the

A) Viscosity of the liquid B) Weight of the liquid displaced C) Depth of immersion of the body D) Surface tension of the liquid

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Answer & Solution

Answer: Option B

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Fluid Mechanics MCQ Questions & Answers | Chemical Engineering