Electrical Engineering : Rectifiers And Converters QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply ? |
| Mechanical rectifiers |
| Copper oxide rectifiers |
| Selenium rectifiers |
| Electrolytic rectifiers |
2.The efficiency of the copper oxide rectifier seldom exceeds |
| 90 to 95% |
| 85 to 90% |
| 80 to 85% |
| 65 to 75% |
3.The metal rectifiers, as compared to mercury arc rectifiers |
| operate on low temperatures |
| can operate on high voltages |
| can operate on heavy loads |
| give poor regulation |
4.When a rectifier is loaded which of the following voltage drops take place ? |
| Voltage drop in transformer reactance |
| Voltage drop in resistance of transformer and smoothing chokes |
| Arc voltage drop |
| All of the above |
5.In a glass bulb mercury arc rectifier the maximum current rating is restricted to |
| 2000 A |
| 1500 A |
| 1000 A |
| 500 A |
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