Heat transfer MCQ with Answers

Heat transfer MCQ with Answers

86) Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by

Answer is:

radiation

87) Absorptivity of a body will be equal to its emissivity

Answer is:

when system is under thermal equi-librium

88) In regenerator type heat exchanger, heat transfer takes place by

Answer is:

flow of hot and cold fluids alternately over a surface

89) A perfect black body is one which

Answer is:

abslprbs heat radiations of all wave lengths falling on it

90) Planck′s law holds good for

Answer is:

black bodies

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