- (A) the power factor will be low
- (B) windage losses will be more
- (C) bearing friction will reduce
- (D) copper loss will reduce In an induction motor
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- (A) rotor current
- (B) rotor power factor
- (C) rotor e.m.f.
- (D) shaft diameter
- (A) graphite
- (B) grease
- (C) mineral oil
- (D) molasses
- (A) efficiency
- (B) power factor
- (C) frequency
- (D) output
- (A) leakage reactance
- (B) power factor on short circuit
- (C) short-circuit current under rated voltage
- (D) all of the above
- (A) noload test
- (B) blocked rotor test
- (C) stator resistance test
- (D) all of the above
- (A) to reduce the magnetic hum and locking tendency of the rotor
- (B) to increase the tensile strength of the rotor bars
- (C) to ensure easy fabrication
- (D) none of the above
- (A) at the unit value of slip
- (B) at the zero value of slip
- (C) at the value of the slip which makes rotor reactance per phase equal to the resistance per phase
- (D) at the value of the slip which makes the rotor reactance half of the rotor
- (A) dependent on the shaft loading
- (B) dependent on the number of slots
- (C) slip times the stand still e.m.f. induced in the rotor
- (D) none of the above
- (A) to short circuit the rotor at slip rings
- (B) to short circuit the starting resistances in the starter
- (C) to short circuit the stator phase of motor to form star
- (D) none of the above
