Chemical Heat Transfer

In case of evaporators, liquid entrainment results primarily due to_________________?

Byadmin March 3, 2019August 24, 2021

In case of evaporators, liquid entrainment results primarily due to_________________?

A. High vacuum in the evaporator
B. High evaporation rate
C. Foaming of the solution
D. High heat transfer rate

Chemical Heat Transfer

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

A. Keeg the heat transfer surface clean
B. Enhancing the fluid pumg rate
C. Increasing the tube length
D. None of these

Read More Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?
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________________?
Chemical Heat Transfer

For hot feed, forward feeding as compared to backward feeding results in ______________ economy?

For hot feed, forward feeding as compared to backward feeding results in ______________ economy?

A. Increased
B. Decreased
C. No effect on
D. None of these

Read More For hot feed, forward feeding as compared to backward feeding results in ______________ economy?
Chemical Heat Transfer

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

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

Read More In a multiple effect evaporator, the effect of boiling point elevation is to______________________?
Chemical Heat Transfer

In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred_________________?

In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred_________________?

A. Through a metallic wall
B. By direct contact of hot flue gas with air
C. By heating an intermediate material (like chequor bricks) and then heating the air from this
hot material
D. None of these

Read More In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred_________________?
Chemical Heat Transfer

Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?

Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?

A. Low density
B. High viscosity
C. Partial ionisation
D. Dense structure

Read More Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?

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