Fluid Mechanics

1._________ flow means the flow of incompressible fluid with no shear.

1. Potential
2. Streamline
3. Creep
4. Boundary layer

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2._________ forces act on a particle moving through a stationary fluid.

1. Gravity
2. Drag
3. Buoyant
4. All (A), (B), & (C)

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3._________ forces do not act in case of fluid flow.

1. Elastic
2. Tensile
3. Vibratory
4. Centrifugal

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4._________ is an example of axial flow impeller.

1. Paddle
2. Turbine
3. Propeller
4. All (A), (B) and (C)

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5._________ is used for measuring the static pressure exerted on the wall by a fluid flowing parallel to the wall in a pipeline.

1. Venturimeter
2. Pressure gauge
3. Pitot tube
4. Orificemeter

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6._________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm².

1. Centrifugal
2. Piston
3. Plunger
4. Vane

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7._________ pumps are a group of vacuum pumps.

1. Hyster
2. Sump
3. Mono
4. Submerged

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8._________ pumps are axial flow pumps.

1. Turbine
2. Propeller
3. Diffuser
4. None of these

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9.A 0.5 m high bed made up of a 1 mm dia glass sphere (density 2500 kg/m³ ) is to be fluidised by water (density 1000 kg/m³ ). If at the point of incipient fluidisation, the bed voidage is 40&, the pressure drop across the bed is

1. 4.4 KPa
2. 2.94 KPa
3. 3.7 KPa
4. None of these

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10.A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is

1. Δp
2. < Δp
3. > Δp
4. Δp2

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