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Chemical Heat Transfer

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

Chemical Heat Transfer /
As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

A. Temperature of the body only
B. Wavelength of monochromatic radiation
C. Both A. and B.
D. Nature of material of body

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________? Read More »

Chemical Heat Transfer

Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________?

Chemical Heat Transfer /
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________?

A. Surrounding temperature
B. Average temperature of the fin
C. Temperature of the fin end
D. Constant temperature equal to that of the base

Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the________________? Read More »

Chemical Heat Transfer

The actual temperature drop across the heating surface in an evaporator depends on the_________________?

Chemical Heat Transfer /
The actual temperature drop across the heating surface in an evaporator depends on the_________________?

A. Feed
B. Depth of liquid over heating surface
C. Pressure difference between steam chest and vapour space
D. All A., B. and C.

The actual temperature drop across the heating surface in an evaporator depends on the_________________? Read More »

Chemical Heat Transfer

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?

Chemical Heat Transfer /
Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?

A. Vertical heat exchanger with steam on tube side
B. Vertical heat exchanger with steam on shell side
C. Horizontal heat exchanger with steam on tube side
D. Horizontal heat exchanger with steam on shell side

Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________? Read More »

Chemical Heat Transfer