EMA_EE3109FP_Revision paper 1

The split phase motor is a

• d.c motor.

• three phase motor.

• single phase motor.

• universal supply motor.

Which of the following is NOT a part of universal motor?

• Stator

• Slip ring

• Armature

• Carbon brushes

The universal motor is usually used in

• exhaust fans.

• compressors.

• portable drills.

• high ceiling fan.

A universal motor can operate on

• a single-phase supply only.

• either a dc or 3-phase supply.

• either a dc or single-phase supply.

• either a single-phase or 3-phase supply.

Which one of the following statements is TRUE for a permanent-split capacitor motor?

• There is no centrifugal switch.

• The capacitor used is electrolyte type.

• The capacitor is always in series with the running winding.

• The starting winding is cut off after the motor has run up to speed.

In a permanent-split capacitor induction motor, the capacitor is connected

permanently

• across the voltage supply.

• in series with the starting winding.

• in series with the centrifugal switch.

• in parallel with the centrifugal switch.

The motor used in a household refrigerator is the

• universal motor.

• shaded-pole motor.

• split-phase induction motor.

• capacitor-start induction motor.

The direction of rotation for the split phase motor can be reversed by

• reverse the rotor.

• reversing the supply.

• reversing either the starting or running winding.

• reversing both the starting and running winding.

The centrifugal switch of a capacitor-start induction motor is used for

• speed variation.

• switching on the supply.

• disconnecting the running winding.

• disconnecting the starting winding and capacitor.

The direction of rotation of a universal motor can be reversed by changing

• the supply leads.

• the brush positions.

• the field and armature connections.

• either the field or armature connection.