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Mechanical Engineering Mcqs — Test 13

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Question 1
The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be ________________?
Question 2
Thermal diffusivity of a substance is ____________________?
Question 3
According to Prevost theory of heat exchange ___________________?
Question 4
Thermal conductivity of glass-wool varies from sample to sample because of variation in ________________ ?
Question 5
Which of the following has least value of conductivity_________________?
Question 6
Heat flows from one body to other when they have_________________?
Question 7
The amount of heat flow through a body by conduction is_______________?
Question 8
Which of the following has maximum value of thermal conductivity________________?
Question 9
Heat transfer by radiation mainly depends upon___________________?
Question 10
Moisture would find its way into insulation by vapour pressure unless it is prevented by __________________ ?