The wattage rating for a ceiling fan motor will be in the range_________?
A. 200 to 250 W
B. 250 to 500 W
C. 50 to 150 W
D. 10 to 20 W
Single Phase Induction Motors
The wattage of motor for driving domestic sewing machine will be around__________?
The wattage of motor for driving domestic sewing machine will be around__________?
A. 100 to 150 W
B. 40 to 75 W
C. 10 to 30 W
D. 5 to 10 W
In case of high speed universal motor which of the following needs more attention?
In case of high speed universal motor which of the following needs more attention?
A. End play
B. Air gap
C. Insulation in rotor
D. Balancing of rotor
The repulsion-start induction-run motor is used because of___________?
The repulsion-start induction-run motor is used because of___________?
A. good power factor
B. high efficiency
C. minimum cost
D. high starting torque
In case of a shaded pole motor the direction of rotation of the motor is__________?
In case of a shaded pole motor the direction of rotation of the motor is__________?
A. from main pole to shaded pole
B. from shaded pole to main pole
C. either of the above depending on voltage
D. either of the above depending on power factor
Which of the following single-phase induction motors is generally used in time phonographs ?
Which of the following single-phase induction motors is generally used in time phonographs ?
A. Resistance start
B. Capacitor start capacitor run
C. Shaded pole
D. Universal
Which of the following motors has highest starting torque ?
Which of the following motors has highest starting torque ?
A. Repulsion motor
B. Shaped pole motor
C. Capacitor-start motor
D. Split-phase motor
Which of the following motors can be run on AC. as well as D.C. supply ?
Which of the following motors can be run on AC. as well as D.C. supply ?
A. Universal motor
B. Repulsion motor
C. Synchronous motor
D. Reluctance motor
In A.C. series motor compensating winding is employed to_____________?
In A.C. series motor compensating winding is employed to_____________?
A. reduce the effects of armature reaction
B. increase the torque
C. reduce sparking at the brushes
D. none of the above
In a two value capacitor motor, the capacitor used for running purposes is_______________?
In a two value capacitor motor, the capacitor used for running purposes is_______________?
A. air capacitor
B. paper spaced oil filled type
C. ceramic type
D. a.c. electrolytic type