Fluid Mechanics

431.Select the correct statement.

1. The discharge through a Venturimeter depends upon Δp only and is independent of orientation of the meter
2. A Venturimeter with a given gage difference discharges at a greater rate, when the flow is vertically downward through it, than when the flow is vertically upward
3. For a given pressure difference, the discharge of gas is greater through a Venturimeter, when compressibility is taken into account, than when it is neglected
4. The overall pressure loss is the same in a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

432.Select the wrong statement pertaining to flow of an incompressible fluid through a Venturimeter.

1. For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the Venturimeter
2. Discharge of fluid through a Venturimeter depends upon the gage difference irrespective of the orientation of Venturimeter
3. Venturimeter occupies less space than an orificemeter
4. Venturimeter incurs less power loss compared to an equivalent orificemeter

433.Self-priming centrifugal pump can be used for

1. Booster service
2. Pumping liquid fertilisers (e.g. liquid NH3)
3. Pumping industrial wastes
4. All (A), (B) and (C)

434.Sewage sludge is _________ type of non-Newtonian fluid.

1. Dilatant
2. Bingham plastic
3. Pseudo plastic
4. None of these

435.Sewage sludge is an example of the _________ fluid.

1. Bingham plastic
2. Newtonian
3. Pseudo plastic
4. Dilatent

436.Shear stress in a fluid flowing in a round pipe

1. Varies parabolically across the cross-section
2. Remains constant over the cross-section
3. Is zero at the centre and varies linearly with the radius
4. Is zero at the wall and increases linearly to the centre

437.Slugging in a fluidised bed can be avoided by using

1. Tall narrow vessel
2. Deep bed of solids
3. Shallow beds of solids and proper choice of particle size
4. Very large particles

438.Slugging occurs in a fluidised bed, if the bed is

1. Narrow
2. Deep
3. Both (A) & (B)
4. Neither (A) nor (B)

439.Slurries can be most conveniently pumped by a _________ pump.

1. Screw
2. Reciprocating
3. Gear
4. Centrifugal

440.Small pressure differences in liquids is measured using a/an

1. U-tube manometer
2. Inclined tube manometer
3. Pitot tube
4. None of these