Economy of a multiple effect evaporator is not influenced much by the

Heat Transfer
Economy of a multiple effect evaporator is not influenced much by the

boiling point elevations

temperature of the feed

ratio of the weight of the thin liquor to thick liquor

rate of heat transfer

boiling point elevations

temperature of the feed

ratio of the weight of the thin liquor to thick liquor

rate of heat transfer

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Heat Transfer
Dropwise condensation of steam on cooling surface is promoted

Only in presence of air

An oily surface

When both the steam and the tube are clean

None of these

Only in presence of air

An oily surface

When both the steam and the tube are clean

None of these

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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

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

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

All of these

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

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

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
With increase in temperature, the thermal conductivity of most liquids

Decreases

Remains same

First increases upto a certain temperature and then becomes constant

Increases

Decreases

Remains same

First increases upto a certain temperature and then becomes constant

Increases

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Heat Transfer
LMTD can't be used as such without a correction factor for the

Multipass heat exchanger

All of these

Condensation of mixed vapour in a condenser

Baffled heat exchanger

Multipass heat exchanger

All of these

Condensation of mixed vapour in a condenser

Baffled heat exchanger

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Heat Transfer
In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient

Is not affected

May increase or decrease; depends on the feed

Increases

Decreases

Is not affected

May increase or decrease; depends on the feed

Increases

Decreases

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Heat Transfer

Heat Transfer Economy of a multiple effect evaporator is not influenced much by the

Heat Transfer Dropwise condensation of steam on cooling surface is promoted

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

Heat Transfer With increase in temperature, the thermal conductivity of most liquids

Heat Transfer LMTD can't be used as such without a correction factor for the

Heat Transfer In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient

Heat Transfer
Economy of a multiple effect evaporator is not influenced much by the

Heat Transfer
Dropwise condensation of steam on cooling surface is promoted

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

Heat Transfer
With increase in temperature, the thermal conductivity of most liquids

Heat Transfer
LMTD can't be used as such without a correction factor for the

Heat Transfer
In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient