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Heat Transfer

Heat Transfer
In a boiling curve, the peak heat flux is called the __________ point.

Nusselt
Leidenfrost
Boiling
Burnout

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Heat Transfer
For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.

No
Low
Extremely low
High

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Heat Transfer
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

0.5 to 50
100 to 1000
1 to 100
10 to 100

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Heat Transfer
Vent pipes are provided in a condenser to

Remove non-condensable gases
Purge the condenser
Facilitate easy cleaning of tubes
None of these

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Heat Transfer
The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness)

Independent of 't'
∝ √t
∝ t
∝ 1/t

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Heat Transfer
Sensible heat of hot industrial flue gases can not be recovered by a/an

Economiser
Regenerator
None of these
Ceramic recuperator

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