Fluid Mechanics

381.Pick out the wrong statement:

1. Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer
2. Blowers develop a maximum pressure of 2 atmospheres
3. Friction losses in pipe fittings are generally expressed in terms of velocity heads
4. Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number

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382.Piezometric head is the sum of the _________ heads.

1. Elevation & kinetic energy
2. Elevation & pressure
3. Kinetic energy & pressure
4. None of these

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383.Pipes having diameter 14 inches or more are designated by their

1. Outside diameter
2. Inside diameter
3. Schedule number
4. None of these

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384.Pitot tube measures the _________ of a fluid.

1. Pressure
2. Average velocity
3. Average flow rate
4. Point velocity

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385.Plunger pumps are used for

1. Higher pressure
2. Slurries
3. Viscous mass
4. None of these

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386.Poise is converted into stoke by

1. Multiplying with density (gm/c.c)
2. Dividing by density (gm/c.c)
3. Multiplying with specific gravity
4. Dividing by specific gravity

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387.Potential flow is characterised by the

1. Irrotational and frictionless flow
2. Irrotational and frictional flow
3. One in which dissipation of mechanical energy into heat occurs
4. Formation of eddies within the stream

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388.Potential flow is the flow of

1. Compressible fluids with shear
2. Compressible fluids with no shear
3. Incompressible fluids with shear
4. Incompressible fluids with no shear

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389.Potential function is applicable only for _________ flow.

1. Irrotational
2. Turbulent
3. Steady
4. None of these

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390.Power loss in an orificemeter is _________ that in a Venturimeter.

1. Less than
2. Same as
3. More than
4. Data insufficient, cannot be predicted

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