Electrical Engineering : Heating And Welding QUESTIONS AND ANSWERS :: part1 : 16 to 20
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.Which of the following heating methods has maximum power factor ? |
| Arc heating |
| Dielectric heating |
| Induction heating |
| Resistance heating |
17.In a resistance furnace the atmosphere is |
| oxidising |
| deoxidising |
| reducing |
| neutral |
18.In an electric room heat convector the method of heating used is |
| arc heating |
| resistance heating |
| induction heating |
| dielectric heating |
19.In induction heating ______ is abnormally high. |
| phase angle |
| frequency |
| current |
| voltage |
20.Which of the following has the highest value of thermal conductivity ? |
| Water |
| Steam |
| Solid ice |
| Melting ice |
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