Heat Transfer - Study Mode
[#226] $$frac{{{{ ext{C}}_{ ext{p}}}.mu }}{{ ext{K}}}$$ xa0is termed as the __________ number.
Correct Answer
(C) Prandtl
[#227] Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
Correct Answer
(D) Constant temperature equal to that of the base
[#228] Double pipe heat exchangers are preferably useful, when
Correct Answer
(B) Requirement of heat transfer area is low
[#229] The thermal boundary layer at N Pr > 1
Correct Answer
(B) Is thinner than hydrodynamic boundary layer
[#230] Maximum heat transfer rate is achieved in __________ flow.
Correct Answer
(C) Turbulent