Maximum heat transfer rate is achieved in __________ flow.

Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Turbulent

Laminar

Counter-current

Co-current

Turbulent

Laminar

Counter-current

Co-current

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Heat Transfer
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred

None of these

By heating an intermediate material (like chequor bricks) and then heating the air from this hot material

Through a metallic wall

By direct contact of hot flue gas with air

None of these

By heating an intermediate material (like chequor bricks) and then heating the air from this hot material

Through a metallic wall

By direct contact of hot flue gas with air

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Heat Transfer
Heat sensitive materials can be concentrated in an evaporator employing

High pressure

None of these

Vacuum

High residence time

High pressure

None of these

Vacuum

High residence time

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Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Facilitate forward feeding in multiple effect evaporation

Get economical temperature difference by using moderate pressure steam

Concentrate heat sensitive materials

Achieve very high concentration of the final product

Facilitate forward feeding in multiple effect evaporation

Get economical temperature difference by using moderate pressure steam

Concentrate heat sensitive materials

Achieve very high concentration of the final product

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Heat Transfer
Choose the most important factor on which the heat conducted through a wall in a unit time will depend on?

Material of the wall

Thickness of the wall

Area of the wall perpendicular to heat flow

Temperature difference between the two surfaces of the wall

Material of the wall

Thickness of the wall

Area of the wall perpendicular to heat flow

Temperature difference between the two surfaces of the wall

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

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

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

All of these

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Heat Transfer

Heat Transfer Maximum heat transfer rate is achieved in __________ flow.

Heat Transfer In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred

Heat Transfer Heat sensitive materials can be concentrated in an evaporator employing

Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer Choose the most important factor on which the heat conducted through a wall in a unit time will depend on?

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

Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Heat Transfer
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred

Heat Transfer
Heat sensitive materials can be concentrated in an evaporator employing

Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer
Choose the most important factor on which the heat conducted through a wall in a unit time will depend on?

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