As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the

Heat Transfer
As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the

temperature of the body only

nature of material of body

wavelength of monochromatic radiation

none of the listed here

temperature of the body only

nature of material of body

wavelength of monochromatic radiation

none of the listed here

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

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

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

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Heat Transfer
Thermal diffusivity of a material

Is the ratio of thermal conductivity to thermal capacity

Is defined as K/ρ . Cp

All of these

Has the unit m² /sec

Is the ratio of thermal conductivity to thermal capacity

Is defined as K/ρ . Cp

All of these

Has the unit m² /sec

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Heat Transfer
Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

1/U₁ - 1/U₂

1/U₂ - 1/U₁

U₁ - U₂

U₂ - U₁

1/U₁ - 1/U₂

1/U₂ - 1/U₁

U₁ - U₂

U₂ - U₁

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Heat Transfer
A dephlegmator is a

Double pipe heat exchanger

Vacuum evaporator

Total condenser

Partial condenser

Double pipe heat exchanger

Vacuum evaporator

Total condenser

Partial condenser

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Heat Transfer
Which of the following is correct ?

Rate = Driving force x Resistance

Rate = Resistance/Driving force

Driving force = Rate x Resistance

Resistance = Driving force x Rate

Rate = Driving force x Resistance

Rate = Resistance/Driving force

Driving force = Rate x Resistance

Resistance = Driving force x Rate

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Heat Transfer

Heat Transfer As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the

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

Heat Transfer Thermal diffusivity of a material

Heat Transfer Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

Heat Transfer A dephlegmator is a

Heat Transfer Which of the following is correct ?

Heat Transfer
As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the

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

Heat Transfer
Thermal diffusivity of a material

Heat Transfer
Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

Heat Transfer
A dephlegmator is a

Heat Transfer
Which of the following is correct ?