Electrical Engineering : Heating And Welding QUESTIONS AND ANSWERS :: part1 : 11 to 15
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
11.Heat transfer by condition will not occur when |
| bodies are kept in vacuum |
| bodies are immersed in water |
| bodies are exposed to thermal radiations |
| temperatures of the two bodies are identical |
12.A non-dimensional number generally associated with natural convection heat transfer is |
| Prandtl number |
| Grashoff number |
| Pecelet number |
| Nusselt number |
13.By the use of which of the following, high frequency power supply for induction furnaces can be obtained ? |
| Coreless transformers |
| Current transformers |
| Motor-generator set |
| Multi-phase transformer |
14.Heat is transferred simultaneously by condition, convection and radiation |
| inside boiler furnaces |
| during melting of ice |
| through the surface of the insulted pipe carrying steam |
| from refrigerator coils to freezer of a refrigerator |
15.The temperature inside a furnace is usually measured by which of the following ? |
| Optical pyrometer |
| Mercury thermometer |
| Alcohol thermometer |
| Any of the above |
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