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
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

d²T/dZ² > 0

d²T/dZ² < 0

dT/dZ = 0

d²T/dZ² = 0

d²T/dZ² > 0

d²T/dZ² < 0

dT/dZ = 0

d²T/dZ² = 0

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Heat Transfer
A perfect black body is a perfect __________ of radiation

Both emitter & absorber

absorber

none of the listed here

emitter

Both emitter & absorber

absorber

none of the listed here

emitter

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Heat Transfer
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Maximum

Zero

Minimum

Infinity

Maximum

Zero

Minimum

Infinity

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Heat Transfer
Thermal conductivity of a gas at low density, __________ with increase in temperature.

May increase or decrease; depends on the gas

Remains unchanged

Increases

Decreases

May increase or decrease; depends on the gas

Remains unchanged

Increases

Decreases

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Heat Transfer
The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of 'n' is exactly 4 for

Polished bodies only

All bodies

Black painted bodies only

A black body

Polished bodies only

All bodies

Black painted bodies only

A black body

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Heat Transfer
Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger?

Viscosity

Pressure

Corrosiveness & fouling characteristics

Density

Viscosity

Pressure

Corrosiveness & fouling characteristics

Density

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Heat Transfer

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 A perfect black body is a perfect __________ of radiation

Heat Transfer In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Heat Transfer Thermal conductivity of a gas at low density, __________ with increase in temperature.

Heat Transfer The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of 'n' is exactly 4 for

Heat Transfer Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger?

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
A perfect black body is a perfect __________ of radiation

Heat Transfer
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Heat Transfer
Thermal conductivity of a gas at low density, __________ with increase in temperature.

Heat Transfer
The thermal radiation emitted by a body is proportional to Tn, where T is its absolute temperature. The value of 'n' is exactly 4 for

Heat Transfer
Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger?