In a gas-liquid shell and tube heat exchanger, the

Heat Transfer
In a gas-liquid shell and tube heat exchanger, the

Gases under high pressure are routed through the tube side, because high pressure gases are corrosive in nature

Presence of a non-condensible gas decreases the condensing film co-efficient

Gases to be heated/cooled is normally routed through the shell side, because the corrosion caused by the cooling water or steam condensate remain localised to the tubes

All of these

Gases under high pressure are routed through the tube side, because high pressure gases are corrosive in nature

Presence of a non-condensible gas decreases the condensing film co-efficient

Gases to be heated/cooled is normally routed through the shell side, because the corrosion caused by the cooling water or steam condensate remain localised to the tubes

All of these

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Heat Transfer
Which of the following situations can be approximated to a steady state heat transfer system?

A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C

10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C

A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C

10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C

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Heat Transfer
What is the absorptivity of a black body?

0.95

1

0.78

0.95

1

0.78

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Heat Transfer
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Half

Is same as

Lower than

Greater than

Half

Is same as

Lower than

Greater than

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Heat Transfer
At constant temperature, the thermal conductivities of gases __________ with rise in pressure.

May increase or decrease; depends on the pressure

Remain unchanged

Decrease

Increase

May increase or decrease; depends on the pressure

Remain unchanged

Decrease

Increase

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Heat Transfer
Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Increasing the tube length

None of these

Enhancing the fluid pumping rate

Keeping the heat transfer surface clean

Increasing the tube length

None of these

Enhancing the fluid pumping rate

Keeping the heat transfer surface clean

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Heat Transfer

Heat Transfer In a gas-liquid shell and tube heat exchanger, the

Heat Transfer Which of the following situations can be approximated to a steady state heat transfer system?

Heat Transfer What is the absorptivity of a black body?

Heat Transfer The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure.

Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Heat Transfer
In a gas-liquid shell and tube heat exchanger, the

Heat Transfer
Which of the following situations can be approximated to a steady state heat transfer system?

Heat Transfer
What is the absorptivity of a black body?

Heat Transfer
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

Heat Transfer
At constant temperature, the thermal conductivities of gases __________ with rise in pressure.

Heat Transfer
Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by