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Heat Transfer - Interview Questions and Answers

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11. Thermal conductivity of solid metals with rise in temperature normally
A. increases
B. decreases
C. remains constant
D. may increase or decrease depending on temperature
E. unpredictable.
Explanation:
12. Thermal conductivity of water in general with rise in temperature
A. increases
B. decreases
C. remains constant
D. may increase or decrease depending on temperature
E. none of the above.
Explanation:
13. Heat transfer in liquid and gases takes place by
A. conduction
B. convection
C. radiation
D. conduction and convection
E. convection and radiation.
Explanation:
14. Metals are good conductors of heat because
A. their atoms collide frequently
B. thier atoms-are relatively far apart
C. they contain free electrons
D. they have high density
E. all of the above.
Explanation:
15. Heat flows from one body to other when they have
A. different heat contents
B. different specific heat
C. different atomic structure
D. different temperatures
E. none of the above.
Explanation:
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