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Heat Transfer

Heat Transfer
Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second.

3 x l05
3 x l08
3 x l012
3 x l010

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Heat Transfer
If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will

Remain unchanged
Increase by 216
Increase by 1.8 times
Decrease by 22

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Heat Transfer
In SI units, thermal conductivity is expressed in

Watt/m4. °K
Watt/m². °K
Watt/m.°K
Watt/m². °K

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Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Kopp's
Kistyakowski
Lee's
Antonie

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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

d²T/dZ² > 0
d²T/dZ² < 0
dT/dZ = 0
d²T/dZ² = 0

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Heat Transfer
Steam is routed through the tube in case of a __________ evaporator.

Basket type
Long tube vertical
Short tube vertical
Horizontal tube

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