
Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part1 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.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 |
0.5. |
7.Thermal conductivity of water at 20�C is of the order of |
0.1 |
0.23 |
0.42 |
0.51 |
0.64. |
8.Temperature of steam at around 540�C canbe measured by |
thermometer |
radiatiouv pyrometer |
thermistor |
thermocouple |
thermopile. |
9.Unit of thermal conductivity in S.I. units is |
J/m2 sec |
J/m �K sec |
W/m �K |
(a) and (c) above |
(b) and (c) above. |
10.Cork is a good insulator because it has |
free electrons |
atoms colliding frequency |
low density |
porous body |
all of the above. |
More Heat Transfer QUESTIONS AND ANSWERS available in next pages
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