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Chemical Heat Transfer

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

August 24, 2021March 3, 2019 by admin
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.

Categories Chemical Heat Transfer

The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) ?

August 24, 2021March 3, 2019 by admin
The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) ?

A. (ΔT)2
B. (ΔT)4
C. (ΔT)3
D. √(ΔT)

Categories Chemical Heat Transfer

In a multiple effect evaporator, the effect of boiling point elevation is to______________________?

August 24, 2021March 3, 2019 by admin
In a multiple effect evaporator, the effect of boiling point elevation is to______________________?

A. Reduce the capacity
B. Reduce the economy
C. Increase the economy
D. None of these

Categories Chemical Heat Transfer

Film condensation is promoted on a/an _______________________ surface?

August 24, 2021March 3, 2019 by admin
Film condensation is promoted on a/an _______________________ surface?

A. Oily
B. Coated
C. Clean & smooth
D. Dirty

Categories Chemical Heat Transfer

In a boiling curve, the peak heat flux is called the _____________ point?

August 24, 2021March 3, 2019 by admin
In a boiling curve, the peak heat flux is called the _____________ point?

A. Nusselt
B. Leidenfrost
C. Boiling
D. Burnout

Categories Chemical Heat Transfer

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

August 24, 2021March 2, 2019 by admin
In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

A. Nucleate
B. Pool
C. Low pressure
D. None of these

Categories Chemical Heat Transfer

Nusselt number (for forced convection heat transfer) is a function of the _____________ number?

August 24, 2021March 2, 2019 by admin
Nusselt number (for forced convection heat transfer) is a function of the _____________ number?

A. Prandtl
B. Reynolds
C. Both A. & B.
D. Neither A. nor B.

Categories Chemical Heat Transfer

The separation of liquid droplets from the vapor is done by a/an _____________ in the evaporators?

August 24, 2021March 2, 2019 by admin
The separation of liquid droplets from the vapor is done by a/an _____________ in the evaporators?

A. Steam ejector
B. Entrainment separator
C. Compressor
D. Vacuum pump

Categories Chemical Heat Transfer

For the same heat transfer area and the terminal conditions, the ratio of the capacities of a single effect evaporator to a triple effect evaporator is_________________?

August 24, 2021March 2, 2019 by admin
For the same heat transfer area and the terminal conditions, the ratio of the capacities of a single effect evaporator to a triple effect evaporator is_________________?

A. 3
B. 0.33
C. 1
D. 1.33

Categories Chemical Heat Transfer

In forced circulation, the heating element is injected_________________?

August 24, 2021March 2, 2019 by admin
In forced circulation, the heating element is injected_________________?

A. Internally
B. Externally
C. Both A. and A.
D. Neither A. nor B.

Categories Chemical Heat Transfer
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