Electrical Engineering : Dc Motors 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.Ward-Leonard control is basically a |
| voltage control method |
| field divertor method |
| field control method |
| armature resistance control method |
12.Which of the following motors one will choose to drive the rotary compressor ? |
| D.C. shunt motor |
| D.C. series motor |
| Universal motor |
| Synchronous motor |
13.Which of the following steps is likely to result in reduction of hysteresis loss in a D.C. generator ? |
| Providing laminations in armature core |
| Providing laminations in stator |
| Using non-magnetic material for frame |
| Using material of low hysteresis co-efficient for armature core material |
14.Which of the following loss in a D.C. generator is dissipated in the form of heat? |
| Mechanical loss |
| Core loss |
| Copper loss |
| All of the above |
15.In a D.C. generator all of the following could be the effects of iron losses except |
| Loss of efficiency |
| Excessive heating of core |
| Increase in terminal voltage |
| Rise in temperature of ventilating air |
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