Electrical Engineering : Heating And Welding QUESTIONS AND ANSWERS :: part2 : 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.Which of the following is an advantage of eddy current heating ? |
| The amount of heat generated can be controlled accurately |
| Heat at very high rate can be gene-rated |
| The area of the surface over which heat is produced can be accurately controlled |
| All of the above |
12.Radiant heating is used for which of the following ? |
| Annealing of metals |
| Melting of ferrous metals |
| Heating of liquids in electric kettle |
| Drying of paints and varnishes |
13.The electrode of a direct arc furnace is made of |
| tungsten |
| graphite |
| silver |
| copper |
14.Direct arc furnaces have which of the following power factors ? |
| Unity |
| Low, lagging |
| Low, leading |
| Any of the above |
15.For heating element high resistivity material is chosen to |
| reduce the length of heating element |
| increase the life of the heating element |
| reduce the effect of oxidation |
| produce large amount of heat |
More Heating And Welding QUESTIONS AND ANSWERS available in next pages
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