Related Questions

Choose the lettered word or phrase that is most nearly opposite in meaning to the word in capital letters. REPULSION :
A combination
B elongation
C attraction
D oscillation
The word phobia may suggest: (i) fear and hatred, (ii) courage and diligence, (iii) obsession and repulsion
A (i) only
B (ii) and (iii) only
C (i) and (iii) only
D All
A repulsion motor is equipped with
A slip rings
B commutator
C both (A) and (B)
D none of the above
In repulsion motor, maximum torque is developed when
A brush axis is at 45° electrical to the field axis
B brush axis coincides with the field axis
C brush axis is at 90° electrical to the field axis
D none of the above
In repulsion motor, zero torque is developed when
A brush axis is 45° electrical to field axis
B brush axis coincides with the field axis
C brush axis is 90° electrical to field axis
D both (B) and (C)
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.
A shunt motor
B series motor
C compound motor
D separately excited motor
The purpose of stator winding in the compensated repulsion motor is to
A provide mechanical balance
B improve power factor and provide better speed regulation
C prevent hunting in the motor
D eliminate armature reaction
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
In repulsion motor direction of rotation of motor
A Is opposite to that of brush shift
B Is the same as that of brush shift
C Is independent of brush shift
D None
The repulsion start induction run motor is used because of
A good power factor
B high efficiency
C minimum cost
D high starting torque

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