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Heat Transfer

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

Heisler's
Cox
Dirhing's
Mollier's

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Heat Transfer
The purpose of providing a 'catchall' in the vapor line of an evaporator is to

Create vacuum
Regulate the vapor flow
Arrest the entrained liquid
Vent the non-condensible gases

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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

4000
9000
4600
3000

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Heat Transfer
In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is

40.5
25
26.8
34.4

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Heat Transfer
At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?

< 1
1
> 1
None of these

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Heat Transfer
Increasing the liquor level in the evaporator results in the

decreased capacity
increase in liquor film co-efficient
decreased effect of hydrostatic head
increased true temperature drop

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MORE MCQ ON Heat Transfer

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