Related Questions

Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?
A Decrease in effect
B Increase in thrust
C Develops noise
D Develops high pressure
Which of the following is a commonly used manometric liquid for low pressure range?
A Ethyl alcohol
B Carbon tetrachloride
C Glycerol
D Ethylene glycol
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is
A Water
B Carbon tetrachloride
C Paraffin
D Ethylene glycol
Use of water as a manometric liquid suffers from the disadvantage of its
A Low vapour pressure
B Corrosive nature
C High vapour pressure
D High boiling point
Manometric head, in case of a centrifugal pump, is equal to
A Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
B Work-done per kN of water Losses within the impeller
C Energy per kN at outlet of impeller Energy per kN at inlet of impeller
D All of the above
Which of the following is an undesirable property in a tower packing?
A Large surface per unit volume
B Large free cross-section
C Low weight per unit volume
D Large weight of liquid retained
Which of the following is an undesirable property of slag produced during the pyrometallurgical method of metal extraction from its ore?
A High fusibility & fluidity
B High thermal conductivity
C Low density
D High chemical activity
Which of the following is an undesirable property for an absorbing solvent?
A Low vapour pressure
B Low velocity
C Low freezing point
D None of these
The undesirable property of a refrigerant is
A Non-toxic
B Non-flammable
C Non-explosive
D High boiling point
Pick out the undesirable property for a solvent meant for dewaxing of lube oil.
A Complete miscibility with oil
B High solubility of wax in the solvent
C Both A & B
D Neither A nor B

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