Electrical Engineering : Electrical Machine Design QUESTIONS AND ANSWERS :: part4 : 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.The operation of a D.C. machine with large air gap lengths is comparatively |
| quiet |
| noisy |
| either of the above |
| none of the above |
12.In D.C. machines, the ____ in field mmf results in increase in size and cost of machines. |
| increase |
| decrease |
| either of the above |
| none of the above |
13.In D.C. machines the width of the duct is usually |
| 4 mm |
| 6 mm |
| 8 mm |
| 10 mm |
14.D.C. machines designed with a large value of air gap length have |
| worst, ventilation |
| poor ventilation |
| better ventilation |
| none of the above |
15.is usually used for brush rockers |
| Mild steel |
| Copper |
| Aluminium |
| Cast-iron |
More Electrical Machine Design QUESTIONS AND ANSWERS available in next pages
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