Which of the following statements regarding a reluctance motor is incorrect ?

A It cannot be reversed, ordinarily
B It requires no D.C. field excitation for its operation
C It is nothing else but a single-phase, salient pole synchronous-induction motor
D Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor

Correct Answer: It cannot be reversed, ordinarily

Bissoy MCQ
#Electrical Engineering #Single Phase Induction Motors

Related Questions

Which of the following statements regarding reluctance-start motor is incorrect ?
A It is similar to reluctance motor
B It is basically an induction motor and not a synchronous one
C So far as its basic working principle is concerned, it is similar to shaded pole motor
D the air-gap between rotor and salient poles is non- uniform
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will
A Become unstable
B Draw excessive armature current and may burn out
C Fall out of synchronism and come to stand still
D Run as induction motor
For which of the applications a reluctance motor is preferred ?
A Electric shavers
B Refrigerators
C Signalling and timing devices
D Lifts and hoists
A reluctance motor
A Is provided with slip rings
B Requires starting gear
C Has high cost
D Is compact
Reluctance motor is a
A Variable torque motor
B Low torque variable speed motor
C Self starting type synchronous motor
D Low noise, slow speed motor
Which of the following statements regarding two value capacitor motor is incorrect ?
A It is a reversing motor
B It is preferred to permanent-split single-value capacitor motor where frequent reversals are required
C It has low starting as well as rushing currents
D It has high starting torque
Which of the following statements regarding repulsion-start induction motor is incorrect ?
A It requires more maintenance of commutator and other mechanical devices
B It makes quite a bit of noise on starting
C In fractional horse power motors, it has replaced the capacitor motors
D It is not easily reversed
Which of the following statements regarding hysteresis motor is in incorrect ?
A It is extremely sensitive to fluctuations in supply voltage
B Its high starting torque is due to its high rotor hysteresis loss
C It is extremely quiet in operation
D It accelerates from rest to full-speed almost instantaneously
A motor pool has 300 vehicles of which 30% are trucks. 20% of all the vehicles in the motor pool are diesel, including 15 trucks. What percent of the motor pool is composed of vehicles that are neither trucks nor diesel?
A 165%
B 90%
C 65%
D 10%
By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
A Frame
B Shaft
C Commutator
D Stator

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