The starting winding of a single-phase motor is placed in_________?
The starting winding of a single-phase motor is placed in_________?
A. armature
B. field
C. rotor
D. stator
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Most of the fractional horsepower motors have either___________?
Most of the fractional horsepower motors have either___________?A. hard and annealed bearings
B. ball or roller bearings
C. soft and porous bearings
D. plain or sleeve bearingsThe rotor slots, in an induction motor, are usually not quite parallel to the shaft because it_____________?
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it_____________?A. improves the efficiency
B. helps the rotor teeth to remain under the stator teeth
C. helps in reducing the tendency of the rotor teeth to remain under the stator teeth
D. improves the power factorIn a hysteresis motor, the rotor must have____________?
In a hysteresis motor, the rotor must have____________?A. retentivity
B. resistivity
C. susceptibility
D. none of the aboveLocked rotor current of a shaded pole motor is____________?
Locked rotor current of a shaded pole motor is____________?A. equal to full load current
B. less than full load current
C. slightly more than full load current
D. several times the full load currentWhich of the following single-phase motors is suitable for timing and control purposes ?
Which of the following single-phase motors is suitable for timing and control purposes ?A. Reluctance motor
B. Series motor
C. Repulsion motor
D. Universal motorIn a split phase motor, the running winding should have?
In a split phase motor, the running winding should have?A. high resistance and low inductance
B. low resistance and high inductance
C. high resistance as well as high inductance
D. low resistance as well as low inductiance