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Heat Transfer

Heat Transfer
Trap is used to remove __________ from steam pipe lines.

Condensate
None of these
Steam
Non-condensables

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Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

3000
9000
4000
4600

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Heat Transfer
A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is

6000
48000
24000
60000

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Heat Transfer
Which of the following has the highest thermal conductivity ?

Silver
Air
Water
Black

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Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

0.6 to 120
0.001 to 1
120 to 400
0.5 to 5

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Heat Transfer
Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

KA/x
K/Ax
A/Kx
X/KA

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