It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

Byadmin March 2, 2019August 24, 2021

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

A. > 0.75
B. < 0.75
C. < 0.50
D. < 0.25

Chemical Heat Transfer

If heat transfer rate varies with the time, it is termed as__________________?

If heat transfer rate varies with the time, it is termed as__________________?

A. Forced convection
B. Steady state conduction
C. Monochromatic radiation
D. None of these

Read More If heat transfer rate varies with the time, it is termed as__________________?
Chemical Heat Transfer

In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?

A. Velocity of circulation
B. Liquor-film co-efficient
C. Both A. and B.
D. Neither A. and B.

Read More In case of a vertical tube evaporator, with increase in the liquor level, the ____________ is increased?
Chemical Heat Transfer

____________ chart is known as transient heat conduction chart?

____________ chart is known as transient heat conduction chart?

A. Dirhing’s
B. Heisler’s
C. Mollier’s
D. Cox

Read More ____________ chart is known as transient heat conduction chart?
Chemical Heat Transfer

Radiation heat transfer rates does not depend upon the_________________?

Radiation heat transfer rates does not depend upon the_________________?

A. Type of absorbing surface
B. Distance between the heat source and the object receiving the heat
C. Surface area and temperature of the heat source
D. None of these

Read More Radiation heat transfer rates does not depend upon the_________________?
Chemical Heat Transfer

Double pipe heat exchangers are preferably useful, when____________________?

Double pipe heat exchangers are preferably useful, when____________________?

A. High viscosity liquid is to be cooled
B. Requirement of heat transfer area is low
C. Overall heat transfer co-efficient is very high
D. A corrosive liquid is to be heated

Read More Double pipe heat exchangers are preferably useful, when____________________?
Chemical Heat Transfer

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?

Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?

A. Heat transfer co-efficient are high
B. There is no risk of contamination
C. There is no mist formation
D. Cost of equipment is lower

Read More Indirect contact heat exchangers are preferred over direct contact heat exchangers, because_________________?

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