Heat Transfer - Study Mode
[#56] For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is
Correct Answer
(C) Nu = $$frac{2}{pi }$$ Gz
[#57] In case of a vertical tube evaporator, with increase in the liquor level, the
Correct Answer
(A) Capacity of the evaporator is decreased
[#58] For a perfectly transparent surface (like gases), the
Correct Answer
(B) Transmissivity = 1
[#59] The units of resistance to heat transfer is
Correct Answer
(D) W -1 .m 2 .K
[#60] A sphere of radius 'R 1 ' is enclosed in a sphere of radius 'R 2 '. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is
Correct Answer
(B) $$frac{{{{ ext{R}}_2}}}{{{{ ext{R}}_1} + {{ ext{R}}_2}}}$$