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

Less

Some

More

Either more or less ; depends on the nature of vapor

Less

Some

More

Either more or less ; depends on the nature of vapor

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Heat Transfer
Water always boils when its

Vapour pressure equals 76 cm of Hg

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

Temperature reaches 100° C

Vapour pressure equals 76 cm of Hg

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

Temperature reaches 100° C

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Heat Transfer
A BTU/hr.ft.2 °F is equal to

4.88 kcal/hr. m.2°C

None of these

1 kcal/hr. m².°K

1 kcal/hr. m²°C

4.88 kcal/hr. m.2°C

None of these

1 kcal/hr. m².°K

1 kcal/hr. m²°C

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Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

0.8

0.6

0.2

0.4

0.8

0.6

0.2

0.4

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Heat Transfer
Sensible heat of hot industrial flue gases can not be recovered by a/an

None of these

Economiser

Regenerator

Ceramic recuperator

None of these

Economiser

Regenerator

Ceramic recuperator

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Heat Transfer
Which of the following is unimportant in forced convection ?

Prandtl number

Reynolds number

none of the listed here

Grashhoff number

Prandtl number

Reynolds number

none of the listed here

Grashhoff number

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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 Water always boils when its

Heat Transfer A BTU/hr.ft.2 °F is equal to

Heat Transfer Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

Heat Transfer Sensible heat of hot industrial flue gases can not be recovered by a/an

Heat Transfer Which of the following is unimportant in forced convection ?

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
Water always boils when its

Heat Transfer
A BTU/hr.ft.2 °F is equal to

Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

Heat Transfer
Sensible heat of hot industrial flue gases can not be recovered by a/an

Heat Transfer
Which of the following is unimportant in forced convection ?