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Engineering
Mechanical
ME Set-3
Heat transfer
18

Heat transfer MCQ with Answers

18) Cork is a good insulator because it has

free electrons

atoms colliding frequency

low density

porous body

Answer is:

porous body

Heat transfer MCQ with Answers

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Related Heat transfer MCQ with Answers

19) Thermal conductivity of water in general with rise in temperature

increases

decreases

remains constant

may increase or decrease depending on temperature

Answer is:

may increase or decrease depending on temperature

20) Thermal conductivity of water at 20°C is of the order of

0.1

0.23

0.42

0.51

Answer is:

0.51

21) Temperature of steam at around 540°C can be measured by

thermometer

radiatiouv pyrometer

thermistor

thermocouple

Answer is:

thermocouple

22) Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of

0.002

0.02

0.01

0.1

Answer is:

0.02

Heat transfer MCQ with Answers

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