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Heat Transfer

Heat Transfer
1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C.

None of these
1
1.49
4.88

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Heat Transfer
Heat waves

Can not pass through vacuum
Can be reflected by a mirror
Both B and C
Travel in straight line

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Heat Transfer
When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.

none of the listed here
film
transition
pool

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Heat Transfer
A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes.

Either B or C, depends on the mass of the body
>10
10

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Heat Transfer
Nusselt number for full developed, laminar, constant property flow in a pipe at uniform heat flux is

83
18
4.364
0.72

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Heat Transfer
Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?

None of the listed here
Bleed point
Catchall
Vent

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