In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Heat Transfer
In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Perimeter to surface area

Surface area to perimeter

Volume to surface area

Surface area to volume

Perimeter to surface area

Surface area to perimeter

Volume to surface area

Surface area to volume

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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

All of these

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

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

All of these

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

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Heat Transfer
The Graetz number is concerned with the

absorption with chemical reaction

mass transfer between a gas and a liquid

heat transfer in laminar flow

heat transfer in turbulent flow

absorption with chemical reaction

mass transfer between a gas and a liquid

heat transfer in laminar flow

heat transfer in turbulent flow

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Heat Transfer
__________ heat exchanger is used for chilling oil to be dewaxed.

Fixed tube

Floating head

Double pipe

U-tube

Fixed tube

Floating head

Double pipe

U-tube

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Heat Transfer
With increase in temperature, the thermal conductivity of a gas

Remains same

Increases

Decreases

May increase or decrease depending on the type of gas

Remains same

Increases

Decreases

May increase or decrease depending on the type of gas

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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

9000

3000

4600

4000

9000

3000

4600

4000

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Heat Transfer

Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid.

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

Heat Transfer The Graetz number is concerned with the

Heat Transfer __________ heat exchanger is used for chilling oil to be dewaxed.

Heat Transfer With increase in temperature, the thermal conductivity of a gas

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 Biot number, the characteristic length used is the ratio of the __________ of the solid.

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

Heat Transfer
The Graetz number is concerned with the

Heat Transfer
__________ heat exchanger is used for chilling oil to be dewaxed.

Heat Transfer
With increase in temperature, the thermal conductivity of a gas

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