Question: The motor used on small lathes is usually_________?

• 1. universal motor
• 2. DC shunt motor
• 3. single-phase capacitor run motor
• 4. 3-phase synchronous motor

Question: A hysteresis motor works on the principle of__________?

• 1. hysteresis loss
• 2. magnetisation of rotor
• 3. eddy current loss
• 4. electromagnetic induction

Question: Which of the following motor will give the highest starting torque ?

• 1. DC shunt motor
• 2. Schrage motor
• 3. Repulsion start and induction run motor
• 4. Universal motor

Question: The power factor of a single-phase induction motor is usually?

• 1. lagging
• 2. always leading
• 3. unity
• 4. unity to 0.8 leading

Question: A shaded pole motor can be used for_____________?

• 1. toys
• 2. hair dryers
• 3. circulators
• 4. any of the above

Question: In a capacitor start single-phase motor, when capacitor is replaced by a resistance____________?

• 1. torque will increase
• 2. the motor will consume less power
• 3. motor will run in reverse direction
• 4. motor will continue to run in same direction

Question: Short-circuiter is used in_____________?

• 1. repulsion induction motor
• 2. repulsion motor
• 3. repulsion start induction run motor
• 4. none of the above

Question: The range of efficiency for shaded pole motors is______________?

• 1. 95% to 99%
• 2. 80% to 90%
• 3. 50% to 75%
• 4. 5% to 35%

Question: Burning out of winding is due to___________?

• 1. short circuited capacitor
• 2. capacitor value hiving changed
• 3. open circuiting of capacitor
• 4. none of the above

Question: Direction of rotation of a split phase motor can be reversed by reversing the connection of__________?

• 1. running winding only
• 2. starting winding only
• 3. either A or B
• 4. both A and B