Multiple Choice
Unsteady state of heat flow occurs in
A) Flow of heat through furnace walls
B) Flow of heat through insulated pipe with constant surface temperature
C) Annealing of castings
D) Flow of heat through refrigerator walls
E) None of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q15: The material preferred for the fabrication of
Q16: Gases have poor<br>A)Absorptivity<br>B)Transmissivity<br>C)Reflectivity<br>D)Reflectivity + absorptivity<br>E)Absorptivity + transmissivity
Q17: The unit of thermal diffusivity is<br>A)m<sup>2</sup>/hr°C<br>B)m<sup>2</sup>/hr<br>C)m/hr°C<br>D)kcal/m<sup>2</sup>-hr<br>E)m/hr
Q18: A body which transmits all the radiations
Q19: The process of removal of oil from
Q21: Prandtl number for liquid metals is generally
Q22: Heat conduction does not occur<br>A)If the parts
Q23: Hygrometer is used to measure<br>A)Convective heat transfer
Q24: Least value of Prandlt number can be
Q25: In the electrical network analysis method the