Electrical Engineering : Rectifiers And Converters QUESTIONS AND ANSWERS :: part1 : 6 to 10
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The potential drop in the arc, in a mercury arc rectifier, varies |
| 0.05 V to 0.2 V per cm length of the arc |
| 0.5 V to 1.5 V per cm length of the arc |
| 2 V to 3.5 V per cm length of the arc |
| none of the above |
7.Which of the following is reversible in action ? |
| Motor generator set |
| Motor converter |
| Rotary converter |
| Any of the above |
8.A rotary converter operates at a |
| low power factor |
| high power factor |
| zero power factor |
| none of the above |
9.In a rotary converter armature currents are |
| d.c. only |
| a.c. only |
| partly a.c. and partly d.c. |
| partly a.c. and partly d.c. |
10.Which of the following AC. motors is usually used in large motor-generator sets? |
| Synchronous motor |
| Squirrel cage induction motor |
| Slip ring induction motor |
| Any of the above |
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