Mechanical Engineering Questions And Answers :: Heat Transfer: part1



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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