Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

Heat Transfer
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

Finned tube heat exchanger with air outside and steam inside

Shell and tube heat exchanger with air on shell side and steam inside tubes

Shell and tube heat exchanger with air inside tubes and steam on shell side

Finned tube heat exchanger with air inside and steam outside

Finned tube heat exchanger with air outside and steam inside

Shell and tube heat exchanger with air on shell side and steam inside tubes

Shell and tube heat exchanger with air inside tubes and steam on shell side

Finned tube heat exchanger with air inside and steam outside

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Heat Transfer
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would

Decrease

First decrease and then increase

Increase

First increase and then decrease

Decrease

First decrease and then increase

Increase

First increase and then decrease

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Heat Transfer
__________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side.

Three pass, fixed tube sheet

U-tube

None of these

Single pass, fixed tube sheet

Three pass, fixed tube sheet

U-tube

None of these

Single pass, fixed tube sheet

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Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

continues to decrease

goes through a minimum

continues to increase

goes through a maximum.

continues to decrease

goes through a minimum

continues to increase

goes through a maximum.

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Heat Transfer
Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid

when Grashhoff number is very important

for fluids in laminar flow

for fluids in tubulent flow

none of the listed here

when Grashhoff number is very important

for fluids in laminar flow

for fluids in tubulent flow

none of the listed here

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Heat Transfer
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is

IR2

None of the listed here

I2R

IR

IR2

None of the listed here

I2R

IR

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Heat Transfer

Heat Transfer Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

Heat Transfer For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would

Heat Transfer __________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side.

Heat Transfer As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

Heat Transfer Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid

Heat Transfer Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is

Heat Transfer
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is

Heat Transfer
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would

Heat Transfer
__________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side.

Heat Transfer
As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient

Heat Transfer
Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid

Heat Transfer
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is