ENG5046 PartB

Which component of a DC motor is responsible for creating the magnetic field necessary for its operation?

• Stator

• Bearings

• Field Windings

• Armature Windings

How does a brushed DC motor reverse its direction of rotation?

• By reversing the direction of current in the armature windings

• By physically turning the motor around

• By switching the stator and rotor

• By changing the voltage supply frequency

Which type of DC machine has the schematic below?

• Series Wound

• Shunt Wound

• Long shunt wound

• Short Shunt Wound

Which type of DC machine has the schematic below?

• Long shunt wound

• Short shunt wound

• Shunt wound

• Series wound

Which part of a DC machine is showed by the photo below?

• Commutator

• Bearing

• Carbon Brush

• Slip rings

Which part of a DC machine is showed by the photo below?

• Commutator

• Sliprings

• Carbon Brush

• Bearing

Which of the following is not a type of self-excited DC machine?

• Series Wound

• Shunt Wound

• Compound Wound

• Squirrel cage wound

Which type of DC machine that has a field winding which is electrically separated from the armature circuit?

• self-excited

• separately excited

• series wound

• shunt wound

Which of the following instruments can be used to measure the speed of the DC motor?

• Voltmeter

• Clampmeter

• Ohmmeter

• Tachometer

Which instrument can be used when testing the output voltage of the DC generator?

• Voltmeter

• Ohmmeter

• RCD tester

• Tachometer