The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Some

Less

Either more or less ; depends on the nature of vapor

More

Some

Less

Either more or less ; depends on the nature of vapor

More

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Heat Transfer
Presence of a non-condensing gas in a condensing vapour

None of the listed here

is desirable to increase the film co-efficient

increases the rate of condensation

decreases thermal resistance

None of the listed here

is desirable to increase the film co-efficient

increases the rate of condensation

decreases thermal resistance

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Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

3000

9000

4000

4600

3000

9000

4000

4600

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Heat Transfer
In a heat exchanger, one transfer unit means

Both A and B

The size of the exchanger in which heat transfer rate is 1 kcal/hr

A section of the exchanger in which change in temperature of one stream equals the average driving force in the section

None of these

Both A and B

The size of the exchanger in which heat transfer rate is 1 kcal/hr

A section of the exchanger in which change in temperature of one stream equals the average driving force in the section

None of these

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Heat Transfer
Multiple effect evaporation accounts for

Lower operating costs

None of these

Steam economy

Investment economy

Lower operating costs

None of these

Steam economy

Investment economy

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Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Parabolic

Logarithmic

Hyperbolic

Linear

Parabolic

Logarithmic

Hyperbolic

Linear

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Heat Transfer

Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer Presence of a non-condensing gas in a condensing vapour

Heat Transfer An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

Heat Transfer In a heat exchanger, one transfer unit means

Heat Transfer Multiple effect evaporation accounts for

Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer
Presence of a non-condensing gas in a condensing vapour

Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

Heat Transfer
In a heat exchanger, one transfer unit means

Heat Transfer
Multiple effect evaporation accounts for

Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.