Hydraulics And Fluid Mechanics MCQ Questions & Answers

1

The total energy line lies over the hydraulic gradient line by an amount equal to the

A) Pressure head B) Velocity head C) Pressure head + velocity head D) Pressure head - velocity head

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Answer & Solution

Answer: Option B

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2

In a venturi-flume, the flow takes place at

A) Atmospheric pressure B) Gauge pressure C) Absolute pressure D) None of these

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Answer & Solution

Answer: Option A

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3

If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

A) 51 cm B) 50 cm C) 52 cm D) 52.2 cm

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Answer & Solution

Answer: Option A

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4

The buoyancy depends on

A) Mass of liquid displaced B) Viscosity of the liquid C) Pressure of the liquid displaced D) Depth of immersion

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Answer & Solution

Answer: Option A

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5

Overall efficiency of a centrifugal pump is the ratio of

A) Energy available at the impeller to the energy supplied to the pump by the prime mover B) Actual work-done by the pump to the energy supplied to the pump by the prime mover C) Energy supplied to the pump to the energy available at the impeller D) Manometric head to the energy supplied by the impeller per kN of water

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Answer & Solution

Answer: Option B

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6

Mechanical efficiency of a centrifugal pump is the ratio of

A) Energy available at the impeller to the energy supplied to the pump by the prime mover B) Actual work-done by the pump to the energy supplied to the pump by the prime mover C) Energy supplied to the pump to the energy available at the impeller D) Manometric head to the energy supplied by the impeller per kN of water

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Answer & Solution

Answer: Option A

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7

The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

A) 2.4 m B) 3.0 m C) 4.0 m D) 5.0 m

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Answer & Solution

Answer: Option B

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8

An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called

A) Weir B) Notch C) Orifice D) None of these

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Answer & Solution

Answer: Option B

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9

The hammer blow in pipes occurs when

A) There is excessive leakage in the pipe B) The pipe bursts under high pressure of fluid C) The flow of fluid through the pipe is suddenly brought to rest by closing of the valve D) The flow of fluid through the pipe is gradually brought to rest by closing of the valve

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Answer & Solution

Answer: Option C

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10

One poise is equal to

A) 0.1 N-s/m² B) 1 N-s/m² C) 10 N-s/m² D) 100 N-s/m²

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Answer & Solution

Answer: Option A

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Hydraulics And Fluid Mechanics MCQ Questions &amp; Answers | Mechanical Engineering

Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering