Meters and connections

Which instrument is used to measure the voltage between two points in a circuit?

• Ammeter

• Voltmeter

• Ohmmeter

• Wattmeter

What should be done before measuring the resistance of cables or components?

• Isolate the supply voltage

• Connect the ammeter

• Remove the voltmeter

• Set the ohmmeter to the wrong range

What is the formula for power?

• Voltage + Current

• Voltage / Current

• Voltage x Current

• Voltage - Current

What is the purpose of a low resistance ohmmeter?

• Measure the current in a circuit

• Measure earth fault loop impedance

• Test continuity of protective conductors

• Test insulation resistance

What is the range of an insulation resistance tester?

• 0.0Ω – 2000 MΩ

• 250 V, 500 V, 1000 V

• 0.2Ω - 2Ω

• 20 Ω

What is the purpose of an earth fault loop impedance tester?

• Measure the current in a circuit

• Test insulation resistance

• Measure earth fault loop impedance

• Test continuity of protective conductors

Which instrument is used to measure the current in a circuit?

• Wattmeter

• Voltmeter

• Ammeter

• Ohmmeter

What is the function of a wattmeter?

• Measure the current in a circuit

• Measure the voltage in a circuit

• Measure the power in a circuit

• Measure the resistance in a circuit

What is the formula for resistance?

• Voltage / Current

• Voltage x Current

• Voltage + Current

• Voltage - Current

What should be done before using an earth fault loop impedance tester?

• Isolate the supply voltage

• Connect the ammeter

• Remove the voltmeter

• Set the ohmmeter to the wrong range