Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part4 : 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.The armature voltage control of D.C. motor provides |
| constant voltage drive |
| constant current drive |
| constant torque drive |
| none of the above |
2.Which of the following loss in a D.C. generator varies significantly with the load current ? |
| Field copper loss |
| Windage loss |
| Armature copper loss |
| None of the above |
3.Which of the following motors is most suitable for signalling devices and many kinds of timers ? |
| D.C. shunt motor |
| D.C. series motor |
| Induction motor |
| Reluctance motor |
4.If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will |
| increase |
| decrease |
| remain same |
| become zero |
5.If a D.C. motor designed for 40�C ambient temperature is to be used for 50�C ambient temperature, then the motor |
| of lower H.P. should be selected |
| of higher H.P. should be selected |
| can be used for 50�C ambient temperature also |
| is to be derated by a factor recom-mended by manufacturer and select the next higher H.P. motor |
More Dc Motors QUESTIONS AND ANSWERS available in next pages
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