Graetz number is given by

Heat Transfer
Graetz number is given by

mCp/kL

kL/mCp

mCp/kμ

kμ/mCp

mCp/kL

kL/mCp

mCp/kμ

kμ/mCp

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Heat Transfer
In a forward feed multiple effect, the pressure build up will be

least at the inlet of the first effect

least at the outlet of the last effect

highest at the outlet of the last effect

highest at the inlet of the last effect

least at the inlet of the first effect

least at the outlet of the last effect

highest at the outlet of the last effect

highest at the inlet of the last effect

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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

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

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

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Heat Transfer
For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator.

Backward feed

None of these

Vacuum

High pressure

Backward feed

None of these

Vacuum

High pressure

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Heat Transfer
Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

Fick's law

Newton's law of cooling

None of these

Fourier's law

Fick's law

Newton's law of cooling

None of these

Fourier's law

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Heat Transfer
The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as

Ha = 0.8hL

Ha = 2hL

Ha= 5hL

Ha = hL

Ha = 0.8hL

Ha = 2hL

Ha= 5hL

Ha = hL

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Heat Transfer

Heat Transfer Graetz number is given by

Heat Transfer In a forward feed multiple effect, the pressure build up will be

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

Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator.

Heat Transfer Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

Heat Transfer The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as

Heat Transfer
Graetz number is given by

Heat Transfer
In a forward feed multiple effect, the pressure build up will be

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

Heat Transfer
For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator.

Heat Transfer
Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

Heat Transfer
The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as