Heat transfer by radiation mainly depends upon
A) its temperature
B) nature of the body
C) kind and extent of its surface
D) all of the above
E) none of the above.
Correct Answer:
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Q8: Which of the following has maximum value
Q9: Moisture would find its way into insulation
Q10: Heat is transferred by all three modes
Q11: According to Prevost theory of heat exchange
A)it
Q12: The ratio of heat flow Q1/Q2 from
Q14: Thermal diffusivity is
A)a dimensionless parameter
B)function of temperature
C)used
Q15: Thermal diffusivity of a substance is .
A)proportional
Q16: Unit of thermal diffusivity is
A)m2/hr
B)m2/hr°C
C)kcal/m2 hr
D)kcal/m.hr°C
E)kcal/m2 hr°C.
Q17: Thermal conductivity of wood depends on
A)moisture
B)density
C)temperature
D)all of
Q18: In convection heat transfer from hot flue
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