A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Heat Transfer }



8. Thermal conductivity of non-metallic amorphous solids with decrease in temperature
A.Increases
B.Decreases
C.Remains constant
D.May increase or decrease depending on temperature

9. The insulation ability of an insulator with the presence of moisture would
A.Increase
B.Decrease
C.Remain unaffected
D.May increase/decrease depending on temperature and thickness of insulation

10. Depending on the radiating properties, a white body will be white when
A.? = 0, ? = 0 and ? = 1
B.? = 1, ? = 0 and ? = 0
C.? = 0, ? = 1 and ? = 0
D.? = 0, ?+? = 1

11. Which of the following is a case of steady state heat transfer
A.I.C. engine
B.Air preheaters
C.Heating of building in winter
D.None of the above

12. The wave length of the radiation emitted
A.Depends on temperature only
B.Depends on material of body
C.Does not depend on material of body
D.Both (A) and (C) above

13. Pick up the wrong case. Heat flowing from one side to other depends directly on
A.Face area
B.Time
C.Thickness
D.Temperature difference

14. Thermal conductivity of air with rise in temperature
A.Increases
B.Decreases
C.Remains constant
D.May increase or decrease depending on temperature

Page 2 of 14

« 1  2  34 »

Subjects