Single Phase Induction Motor Quiz | Single Phase Induction Motor MCQs and Answers

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Questions
81 If a single phase induction motor runs slower than normal, the most likely defect is
A worn bearings
B short-circuit in the winding
C open-circuit in the winding
D none of the above

Answer: worn bearings
82 Which of the following motors is used in tape-recorders ?
A Hysteresis motor
B Reluctance motor
C Capacitor-run motor
D Universal motor

Answer: Hysteresis motor
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83 Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because
A it is comparatively cheaper
B it has almost non-destructible capacitor
C it has low starting as well as running currents at relatively high power factor
D it is quiet in operation

Answer: it has low starting as well as running currents at relatively high power factor
84 If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then
A motor will not come up to speed
B motor will not carry the load
C current drawn by the motor will be excessively high
D electrolytic capacitor will, in all probability, suffer break down

Answer: electrolytic capacitor will, in all probability, suffer break down
85 If starting winding of a single-phase induction motor is left in the circuit, it will
A run faster
B spark at light loads
C draw excessive current and overheat
D run slower

Answer: draw excessive current and overheat

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