Fluid Mechanics

691.Which of the following is most prone to pulsating discharge flow?

1. Centrifugal pump
2. Reciprocating pump
3. Gear pump
4. Axial flow pump

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692.Which of the following is not a dimension-less parameter?

1. Pressure-co-efficient
2. Froude number
3. Kinematic viscosity
4. Weber number

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693.Which of the following is not an advantage of fluidisation from transfer operation point of view?

1. Intimate contact of the fluid with all parts of the solid particles
2. Lower fluid pumping power requirement
3. Minimisation of temperature variation
4. Prevention of particle segregation

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694.Which of the following is not concerned with the fluid-particle interaction?

1. Drag co-efficient
2. Froude number
3. Galileo number
4. Weber number

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695.Which of the following is not dimension-less?

1. Froude number
2. Kinematic viscosity
3. Pressure co-efficient
4. None of these

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696.Which of the following is the „Blasius equation‟, relating friction factor to the Reynolds number?

1. ƒ = 0.079.N_Re ^-0.25
2. ƒ^-0.5 = 4.07 log_e (N_Reƒ)^-0.6
3. Both ‘a’ and ‘b’
4. None of these

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697.Which of the following is the most common pump for pumping either raw sewage or sludge?

1. Electromagnetic pump
2. Centrifugal pump
3. Reciprocating pump
4. Gear pump

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698.Which of the following is used for pumping crude oil from oil well?

1. Single stage centrifugal pump
2. Gear pump
3. Screw pump
4. Duplex/triplex reciprocating pump

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699.Which of the following is used for very accurate measurement of flow of gas at low velocity?

1. Pitot tube
2. Rotameter
3. Segmental orificemeter
4. Hot wire anemometer

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700.Which of the following may be termed as a variable orifice flow-meter?

1. Rotameter
2. Pitot tube
3. V-notch
4. All (A), (B) and (C)

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