Single Phase Induction Motors

A. 30 to 40
B. 70 to 80
C. 80 to 90
D. 100

A. Induction motor
B. Three-phase series motor
C. Schrage motor
D. Hysteresis motor

A. Hysteresis motor
B. Schrage motor
C. Universal motor
D. Reluctance motor

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)

A. d.c. series motor
B. shaded pole motor
C. capacitor-start capacitor-run motor
D. reluctance motor

A. provide mechanical balance
B. improve power factor and provide better speed regulation
C. prevent hunting in the motor
D. eliminate armature reaction

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 factor

A. secondary winding surrounds the primary winding
B. primary winding surrounds the secondary winding
C. both are usual arrangements
D. none of the above

A. A.C. motor
B. D.C. shunt motor
C. D.C. series motor
D. none of the above

A. high starting torque
B. low starting torque
C. medium starting torque
D. very high starting torque