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 an undesirable property for an absorbing solvent?
A Low vapour pressure
B Low velocity
C Low freezing point
D None of these
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
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent
A Increases
B Decreases
C Decreases linearly
D Remains unaffected
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas
A Increases
B Decreases
C Decreases linearly
D Remains unaffected
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)
A Increase both 'G' and 'S'
B Decrease both 'G' and 'S'
C Increase 'S' and decrease 'G'
D Increase 'G' and decrease 'S'
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be
A 1
B > 1
C ≤ 1
In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency
A Liquid stream should be distributed uniformly
B Gas stream should be distributed uniformly
C Both gas as well as liquid streams should be distributed uniformly
D By passing should be completely avoided
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in
A Decreased solute solubility
B Large minimum liquid to gas (L/G) ratio
C Large number of trays
D All of the above
Which of the following is an undesirable dynamic characteristic of an instrument?
A Reproducibility
B Dead zone
C Time lag
D Static error

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