The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

W/m.k

W/m

None, A is just a number

W/m.k²

W/m.k

W/m

None, A is just a number

W/m.k²

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Heat Transfer
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

dT/dZ = 0

d²T/dZ² = 0

d²T/dZ² < 0

d²T/dZ² > 0

dT/dZ = 0

d²T/dZ² = 0

d²T/dZ² < 0

d²T/dZ² > 0

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Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Some

Less

Either more or less ; depends on the nature of vapor

More

Some

Less

Either more or less ; depends on the nature of vapor

More

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Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to

Δt2

Δt

Δt5/4

Δt1/2

Δt2

Δt

Δt5/4

Δt1/2

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Heat Transfer
When vaporisation takes place directly at the heating surface, it is called

vapour binding

film boiling

nucleate boiling

all of the listed here

vapour binding

film boiling

nucleate boiling

all of the listed here

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Heat Transfer
Baffles are provided in heat exchangers to increase the

Heat transfer rate

Fouling factor

Heat transfer area

Heat transfer co-efficient

Heat transfer rate

Fouling factor

Heat transfer area

Heat transfer co-efficient

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Heat Transfer

Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer In the free convection regime of pool boiling, the heat flux is proportional to

Heat Transfer When vaporisation takes place directly at the heating surface, it is called

Heat Transfer Baffles are provided in heat exchangers to increase the

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

Heat Transfer
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is

Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to

Heat Transfer
When vaporisation takes place directly at the heating surface, it is called

Heat Transfer
Baffles are provided in heat exchangers to increase the