A. Hysteresis motor
B. Reluctance motor
C. Capacitor-run motor
D. Universal motor
Which of the following motors is used in tape-recorders ____________? Read More »
Single Phase Induction Motors A. magnetic relay
B. thermal relay
C. centrifugal switch
D. none of the above
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
Which of the following motors is used in a situation where load increases with speed ? Read More »
Single Phase Induction Motors A. Hysteresis motor
B. Schrage motor
C. Universal motor
D. Reluctance motor
Which of the following motors is used for unity power factor ? Read More »
Single Phase Induction Motors 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)
In repulsion motor, zero torque is developed when___________? Read More »
Single Phase Induction Motors A. d.c. series motor
B. shaded pole motor
C. capacitor-start capacitor-run motor
D. reluctance motor
The motor used for the compressors is____________? Read More »
Single Phase Induction Motors A. provide mechanical balance
B. improve power factor and provide better speed regulation
C. prevent hunting in the motor
D. eliminate armature reaction
The purpose of stator winding in the compensated repulsion motor is to_____________? Read More »
Single Phase Induction Motors 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
In a ceilingfan employing capacitor run motor____________? Read More »
Single Phase Induction Motors