6021. A special type of liquid transporting device is the diffuser pump, in which __________ are minimised.
Bearing losses
Disk friction
Shock losses
Cavitation
✅ The correct answer is option C.
Chemical Engineering
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6022. If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is
Same in both the tubes
Greater in 1 mm dia tube
Greater in 0.5 mm dia tube
Zero in both the tubes
✅ The correct answer is option C.
6023. Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft.
40
34
8
37
✅ The correct answer is option C.
6024. Choking in case of pipe flow means that a
Specified mass flow rate can not be achieved
Valve is closed in the line
Restriction in flow cross-section area occurs
None of these
✅ The correct answer is option A.
6025. The ratio of the wall drag to the form drag in the Stoke’s law range (for motion of spherical particles in a stationary fluid) is
0.5
1
2
0.33
✅ The correct answer is option C.
6026. Speed of sound in an ideal gas depends on its
Temperature
Pressure
Specific volume
None of these
✅ The correct answer is option A.
6027. Select the correct statement.
The discharge through a venturimeter depends upon ?p only and is independent of orientation of the meter
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
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
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
✅ The correct answer is option A.
6028. Function of air vessel provided in a reciprocating pump is to
Reduce discharge fluctuation
Reduce the danger of cavitation
Avoid the necessity of priming
Increase the pump efficiency
✅ The correct answer is option A.
6029. Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid
Lies above the centroid of the plane surface
Is independent of the specific weight of the fluid
Is different for different fluids
Is at the centroid of the plane surface
✅ The correct answer is option B.