Electrical Engineering : Single Phase Induction Motors QUESTIONS AND ANSWERS :: part4 : 16 to 20
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.Which of the following statements regarding a reluctance motor is incorrect ? |
| It cannot be reversed, ordinarily |
| It requires no D.C. field excitation for its operation |
| It is nothing else but a single-phase, salient pole synchronous-induction motor |
| Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluctance path bet�ween stator and rotor |
17.If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then |
| motor will not come upto speed |
| motor will not carry the load |
| current drawn by the motor will be excessively high |
| electrolytic capacitor will, in all probability, suffer break down |
18.If a D.C. series motor is operated on A.C. supply, it will |
| spark excessively |
| have poor efficiency |
| have poor power factor |
| all of the above |
19.Locked rotor current of a shaded pole motor is |
| equal to full load current |
| less than full load current |
| slightly more than full load current |
| several times the full load current |
20.In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will |
| become unstable |
| draw excessive armature current and may burn out |
| fall out of synchronism and come to stand still |
| run as induction motor |
More Single Phase Induction Motors QUESTIONS AND ANSWERS available in next pages
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