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Heat Transfer

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

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

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Heat Transfer
__________ chart is known as transient heat conduction chart.

Heisler's
Cox
Mollier's
Dirhing's

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Heat Transfer
With increase in temperature, the thermal conductivity of most liquids

Decreases
Increases
First increases upto a certain temperature and then becomes constant
Remains same

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Heat Transfer
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

Suspended solids content
Dissolved soilds content
Hardness
All of these

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Heat Transfer
For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally

Increases exponentially
Remains unchanged
Decreases
Increases

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

Carbon black
Tar
Steel
Nitrogen

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