
Mechanical Engineering : Heat Transfer QUESTIONS AND ANSWERS :: part1 : 1 to 5
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.The time constant of a thermocouple is |
| the time taken to attain the final temperature to be measured |
| the time taken to attain 50% of the value of initial temperature difference |
| the time taken to attain 63.2% of the value of initial temperature difference |
| determined by the time taken to reach 100�C from 0�C |
| none of the above. |
2.Thermal conductivity of water in general with rise in temperature |
| increases |
| decreases |
| remains constant |
| may increase or decrease depending on temperature |
| none of the above. |
3.Which of the following is the case of heat transfer by radiation |
| blast furnace |
| heating of building |
| cooling of parts in furnace |
| heat received by a person from fireplace |
| all of the above. |
4.Heat transfer takes place as per - |
| zeroth law of thermodynamics |
| first law of thermodynamic |
| second law of the thermodynamics |
| Kirchhoff law (e) Stefan's law. |
| opt 5 |
5.Thermal conductivity of air with rise in temperature |
| increases |
| decreases |
| remains constant |
| may increase or decrease depending on temperature |
| none of the above. |
More Heat Transfer QUESTIONS AND ANSWERS available in next pages
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