Which of the following has the highest thermal conductivity ?
Which of the following has the highest thermal conductivity ?
A. Brick
B. Air
C. Water
D. Silver
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jH factor for heat transfer is not a function of the _______________ number?
jH factor for heat transfer is not a function of the _______________ number?A. Reynolds
B. Nusselt
C. Grashoff
D. Both B. & C.The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?
The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?A. More
B. Less
C. Same
D. UnpredictableShell side pressure drop in a shell and tube heat exchanger does not depend upon the_________________?
Shell side pressure drop in a shell and tube heat exchanger does not depend upon the_________________?A. Baffle spacing & shell diameter
B. Tube diameter & pitch
C. Viscosity, density & mass velocity of shell side fluid
D. None of theseWhich one gives the monochromatic emissive power for black body radiation ?
Which one gives the monochromatic emissive power for black body radiation ?A. Planck’s law
B. Kirchhoff’s law
C. Wien’s law
D. Stefan-Boltzmann law_____________ equation relates the thermal conductivity of a solid to its temperature ?
_____________ equation relates the thermal conductivity of a solid to its temperature ?A. Antoine
B. Kopp’s
C. Lee’s
D. KistyakowskyFor a multipass shell and tube heat exchanger, the LMTD correction factor is always________________?
For a multipass shell and tube heat exchanger, the LMTD correction factor is always________________?A. 1
B. > 1
C. < 1
D. Between 1 & 2