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Heat Transfer

Heat Transfer
According to Reynolds analogy, Stanton number is equal to

2f
f/2
f/4
f

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Heat Transfer
Grashhoff number is given by

gD2βΔtρ/μ²
gD2βΔtP²μ
gD³βΔtP²/μ
gD³.β.Δtρ²/μ²

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Heat Transfer
Which of the following is unimportant in forced convection ?

Prandtl number
none of the listed here
Reynolds number
Grashhoff number

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Heat Transfer
The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe )

2K/h0
hi/K
2hi/K
K/h0

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Heat Transfer
A 2-4 heat exchanger involves

Only parallel-flow of fluids
Smaller pressure drop compared to 1-2 exchanger
Both counter and parallel-flow of the fluids
Only counter-flow of fluids

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

Low
High
Extremely low
No

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MORE MCQ ON Heat Transfer

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