When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as ___________________ boiling?

Byadmin March 2, 2019August 24, 2021

When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as ___________________ boiling?

A. Pool
B. Nucleate
C. Transition
D. Film

Chemical Heat Transfer

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?

In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?

A. Increases
B. Decreases
C. Does not affect
D. May increase or decrease, depends on the type of baffle

Read More In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side ______________ the heat transfer rate?
Chemical Heat Transfer

Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?

Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?

A. √d
B. d
C. d2
D. d1.5

Read More Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) ?
Chemical Heat Transfer

A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in ______________ minutes?

A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in ______________ minutes?

A. 10
B. > 10
C. < 10
D. Either B. or C., depends on the mass of the body

Read More A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in ______________ minutes?
Chemical Heat Transfer

Increasing the liquor level in the evaporator results in the_______________?

Increasing the liquor level in the evaporator results in the_______________?

A. Decreased capacity
B. Increase in liquor film co-efficient
C. Decreased effect of hydrostatic head
D. Increased true temperature drop

Read More Increasing the liquor level in the evaporator results in the_______________?
Chemical Heat Transfer

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

A. Square pitch
B. Triangular pitch
C. Diagonal square pitch
D. None of these

Read More Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?
Chemical Heat Transfer

The film co-efficient between condensing vapour and metal wall increases with _____________________?

The film co-efficient between condensing vapour and metal wall increases with _____________________?

A. Increasing temperature of the vapour
B. Decreasing temperature of the vapour
C. Increasing viscosity of the film of condensate
D. Increasing temperature drop

Read More The film co-efficient between condensing vapour and metal wall increases with _____________________?

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