Prandtl number is the ratio of

Heat Transfer
Prandtl number is the ratio of

Thermal diffusivity to mass diffusivity

Momentum diffusivity to mass diffusivity

Momentum diffusivity to thermal diffusivity

Thermal diffusivity to momentum diffusivity

Thermal diffusivity to mass diffusivity

Momentum diffusivity to mass diffusivity

Momentum diffusivity to thermal diffusivity

Thermal diffusivity to momentum diffusivity

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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
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

K/h0

2hi/K

hi/K

2K/h0

K/h0

2hi/K

hi/K

2K/h0

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Heat Transfer
Multiple effect evaporation accounts for

Steam economy

Lower operating costs

Investment economy

None of these

Steam economy

Lower operating costs

Investment economy

None of these

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Heat Transfer
Peclet number (Pe) is given by

Pe = Re/Pr

Pe = Re.Pr

Pe = Nu.Re

Pe = Pr/Re

Pe = Re/Pr

Pe = Re.Pr

Pe = Nu.Re

Pe = Pr/Re

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Heat Transfer
Heat transfer rate per unit area is called

thermal conductivity

heat transfer co-efficient

thermal diffusivity

heat flux

thermal conductivity

heat transfer co-efficient

thermal diffusivity

heat flux

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Heat Transfer

Heat Transfer Prandtl number is the ratio of

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

Heat Transfer The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

Heat Transfer Multiple effect evaporation accounts for

Heat Transfer Peclet number (Pe) is given by

Heat Transfer Heat transfer rate per unit area is called

Heat Transfer
Prandtl number is the ratio of

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

Heat Transfer
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

Heat Transfer
Multiple effect evaporation accounts for

Heat Transfer
Peclet number (Pe) is given by

Heat Transfer
Heat transfer rate per unit area is called