Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part1 : 16 to 20
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by |
| conduction |
| convection |
| radiation |
| conduction and convection |
| convection and radiation. |
17.Which of the following is a case of steady state heat transfer |
| I.C. engine |
| air preheaters |
| heating of building in winter |
| all of the above |
| none of the above. |
18.Total heat is the heat required to |
| change vapour into liquid |
| change liquid into vapour |
| increase the temperature of a liquid or vapour |
| convert water into steam and superheat it |
| convert saturated steam into dry steam. |
19.Thermal conductivity of solid metals with rise in temperature normally |
| increases |
| decreases |
| remains constant |
| may increase or decrease depending on temperature |
| unpredictable. |
20.Heat transfer in liquid and gases takes place by |
| conduction |
| convection |
| radiation |
| conduction and convection |
| convection and radiation. |
More Heat Transfer QUESTIONS AND ANSWERS available in next pages
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