Electrical Engineering : Industrial Drives 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.Besides a constant speed a synchronous rotor possesses which of the following advantages ? |
| Lower cost |
| Better efficiency |
| High power factor |
| All of the above |
2.Heat control switches are used in |
| transformers |
| cooling ranges |
| three phase induction motors |
| single phase |
3.The capacity of a crane is expressed in terms of |
| type of drive |
| span |
| tonnes |
| any of the above |
4.In squirrel cage induction motors which of the following methods of starting cannot be used ? |
| Resistance in rotor circuit |
| Resistance in stator circuit |
| Auto-transformer starting |
| Star-delta starting |
5.Which ofthefollowing motors is preferred when smooth and precise speed control over a wide range is desired ? |
| D.C. motor |
| Squirrel cage induction motor |
| Wound rotor induction motor |
| Synchronous motor |
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