Aux 1 Unit 13 Q3

1 / 10

When testing the earth bonding of a motor, what should the resistance between the motor frame and earth be?

A) Less than 0.1 Ω

B) More than 10 Ω

C) Exactly 1 Ω

D) Between 10 Ω and 100 Ω

2 / 10

Which instrument is commonly used to test the insulation resistance of a motor?

B) Megger (insulation resistance tester)

C) Oscilloscope

D) Voltmeter

A) Multimeter

3 / 10

What is the first step in testing the insulation resistance of a motor?

C) Connect the motor to the power supply

D) Measure the motor's current

A) Turn on the motor

B) Isolate the motor from the power supply and discharge any residual voltage in the windings

4 / 10

What setting should the multimeter be on when checking if a motor circuit is dead?

D) Capacitance (Farads)

A) Resistance (Ohms)

B) Voltage (AC or DC, depending on the circuit)

C) Current (Amps)

5 / 10

What is an acceptable insulation resistance reading for a motor with a 500V insulation resistance tester?

B) 1 MΩ or higher

D) 100 kΩ

A) 0.1 MΩ

C) 0.01 MΩ

6 / 10

What is the first step in the procedure for proving a motor circuit is dead using a multimeter?

A) Switch on the motor

C) Connect the motor to the power supply

B) Isolate the circuit by turning off the power supply to the motor

D) Adjust the multimeter to measure current

7 / 10

Where should you place the multimeter probes to check if the motor circuit is dead?

D) On the multimeter itself

B) Between the live (phase) and neutral (or ground) terminals of the circuit

C) On the power switch

A) On the motor casing

8 / 10

After isolating the circuit, what should be done before using the multimeter to check if the circuit is dead?

C) Test the multimeter on a known live circuit to ensure it is functioning correctly

D) Test the multimeter on a known dead circuit

B) Set the multimeter to measure resistance

A) Adjust the multimeter to measure voltage

9 / 10

What tool is typically used to test the earth bonding of a motor?

C) Ammeter

B) Megger (insulation resistance tester)

A) Multimeter set to measure resistance (Ohms)

D) Voltmeter

10 / 10

What reading on the multimeter would confirm that the motor circuit is dead?

C) A resistance reading

D) A current reading

B) A voltage reading of zero (0V)

A) A voltage reading close to the circuit's nominal voltage

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