- (A) hard and annealed bearings
- (B) ball or roller bearings
- (C) soft and porous bearings
- (D) plain or sleeve bearings
Exam preparation MCQs with answers
Practice Pakistan's most useful MCQs for competitive exams
Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.
Latest MCQs
- (A) open armature winding
- (B) shorted armature winding
- (C) shorted field winding”
- (D) high commutator mica
- (E) all of the above
- (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
- (A) run faster
- (B) spark at light loads
- (C) draw excessive current and overheat
- (D) run slower
- (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
- (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
- (A) worn bearings
- (B) short-circuit in the winding
- (C) open-circuit in the winding
- (D) none of the above
- (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
- (A) not start
- (B) run at 2/3 of synchronous speed
- (C) run with excessive vibrations
- (D) take less than the rated load
- (A) the direction of rotation is not fixed
- (B) the direction of instantaneous torque reverses after half cycle
- (C) startes cannot be used on these machines
- (D) starting winding is not provided on the machines
