SINGLE PHASE MOTOR-4
Single Phase Motor Quiz
Test your knowledge on single-phase motors with our engaging quiz! This quiz covers various aspects, from motor types and characteristics to common issues and solutions. Whether you're a student or a professional, you can enhance your understanding of universal motors, starting mechanisms, and much more.
Key Features:
- Multiple choice questions
- Score points for correct answers
- Insightful explanations for each question
31. The speed/load characteristics of a universal motor is same as that of _______
. A.C. motor
D.C. Shunt motor
.D.C. Series motor
None of the above
32. The motor used for the compressors is _______
. D.C. Series motor
Shaded pole motor
capacitor-start capacitor-run motor
reluctance motor
33. In repulsion motor, zero torque is developed when _______
. Brush axis is 45 electrical degrees to field axis
brush axis coincides with the field axis
Brush axis is 90 electricaldegrees to field axis
Both (b) and (c)
34. Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a _______
magnetic relay
. Thermal relay
Centrifugal switch
None of the above
35. If a single phase induction motor runs slower than normal, the most likely defect is _________
worn bearings
short-circuit in the winding
Open-circuit in the winding
None of the above
36. 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 suffer breakdown
37. If starting winding of a single-phase induction motor is left in the circuit, it will ___________
. Run faster
Spark at light loads
. Draw excessive current and overheat
Run slower
38. A shaded pole motor does not possess ____________
. Centrifugal switch
Capacitor
Commutator
All of the above
39. A repulsion motor is equipped with _______
Sliprings
Commutator
. both (a) and (b)
None of the above
40. 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
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