Chemical Heat Transfer

Heat transfer by ____________ may not necessarily require the presence of a medium?

Byadmin March 2, 2019August 24, 2021

Heat transfer by ____________ may not necessarily require the presence of a medium?

A. Conduction
B. Natural convection
C. Forced convection
D. Radiation

Chemical Heat Transfer

It is not preferable to use superheated steam in evaporators, because of its very_________________?

It is not preferable to use superheated steam in evaporators, because of its very_________________?

A. High temperature
B. High pressure
C. Low film co-efficient
D. None of these

Read More It is not preferable to use superheated steam in evaporators, because of its very_________________?
Chemical Heat Transfer

Which type of heat exchanger is preferred for heavy heat loads ?

Which type of heat exchanger is preferred for heavy heat loads ?

A. Double pipe
B. Plate fine
C. Series and parallel set of shell and tube
D. None of these

Read More Which type of heat exchanger is preferred for heavy heat loads ?
Chemical Heat Transfer

Which of the following has the lowest Prandtl number ?

Which of the following has the lowest Prandtl number ?

A. Molten sodium (a coolant used in fast breeder reactor)
B. Water
C. Transformer oil
D. Dilute H2SO4

Read More Which of the following has the lowest Prandtl number ?
Chemical Heat Transfer

In a single effect evaporator, the economy is________________?

In a single effect evaporator, the economy is________________?

A. 1
B. < 1
C. > 1
D. None of these

Read More In a single effect evaporator, the economy is________________?
Chemical Heat Transfer

Corrosiveness of steam condensate is due to the presence of________________?

Corrosiveness of steam condensate is due to the presence of________________?

A. CO2
B. Dissolved O2
C. Both A. & B.
D. Neither A. nor B.

Read More Corrosiveness of steam condensate is due to the presence of________________?
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________________?

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

Read More 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________________?

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