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Heat Transfer

Heat Transfer
Open pan evaporators are preferred to be used, when the solution to be concentrated is

Corrosive
Scaling
Highly viscous
Salty

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Heat Transfer
A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?

Plate
Sphere
Cube
All of these

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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
Radiation energy is emitted by all the substances, which are above

0°K
none of the listed here
100°C
0°C

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Heat Transfer
In the free convection regime of pool boiling, the heat flux is proportional to

Δt2
Δt
Δt1/2
Δt5/4

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Heat Transfer
All analogy equations connecting friction factor and heat transfer co-efficient apply only to

Both A and B
Turbulent flow
Form friction
Wall or skin friction

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MORE MCQ ON Heat Transfer

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