What is Nusselt number ?
What is Nusselt number ?
A. CP. μ/k
B. hD/k
C. h. CP/μ
D. CP. μ/h
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Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?
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B. U2 > U1
C. U1 > U2
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C. Buoyancy of the bubbles produced at active nucleation site
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The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?A. Stefan-Boltzmann’s
B. Planck’s
C. Wien’s displacement
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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________________?A. Surrounding temperature
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B. Greater than
C. Equal to
D. Not related with