Related Questions

________ cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall
A Direct
B Indirect
C Conventional
D Any of the above
Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the
A Packing may be crushed due to thermal expansion/contraction of the components of the equipments
B Pressure drop in the equipment will be very high
C Viscosity variation of the fluids may cause channeling/flooding
D None of these
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
A Low pressure drop and high hold up
B High pressure drop and low hold up
C Low pressure drop and low hold up
D High pressure drop and high hold up
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
A With greater number of blades
B Of increased diameter
C Both A & B
D Neither A nor B
Heat dissipation in cooling towers is mainly by
A Conduction
B Convection
C Evaporation
D Radiation
In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number.
A Lewis
B Grashoff
C Sherwood
D None of these
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
A Wet bulb
B Dry bulb
C Saturation
D Dew point
The entrained concrete is used in lining walls and roofs for making
A Heat insulated
B Sound insulated
C Neither (A) nor (B)
D Both (A) and (B)
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid?
A Bleed point
B Vent
C Catchall
D Baffle
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called
A Condenser efficiency
B Vacuum efficiency
C Nozzle efficiency
D Boiler efficiency

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