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Electrical Installations: Inspection, Testing and Commissioning

Authored by James Jones

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Electrical Installations: Inspection, Testing and Commissioning
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57 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of regulatory tests in electrical installations according to Unit 304: Electrical installations: inspection, testing and commissioning?

To ensure the aesthetic quality of the installation

To verify continuity of conductors and other safety-related aspects

To assess the color coordination of wires

To determine the power consumption of the installation

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the implications of non-compliance of regulatory test results with regulatory values?

Increased efficiency of the electrical system

No significant consequences

Shock, fire, burns, injury

Lower electricity bills

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT listed as an instrument for electrical testing in the provided material?

Voltage indicating device

Earth electrode tester

Digital multimeter

Insulation resistance tester

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the earth fault loop include according to the Earth fault loop impedance (612.9) section?

Only the circuit protective conductor

The main earthing terminal and earthing conductor

The metallic return path or the earth return path in TT and iT systems

All of the above

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the symbol used to denote the earth fault loop impedance?

Zs

Ze

R1 + R2

MET

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can the earth fault loop impedance (Zs) be determined?

By measuring the voltage drop across the appliance

By calculating the sum of the resistance of the appliance and the cable

By measurement of R1 + R2 during continuity testing and adding to Ze

By measuring the current through the circuit

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does Ze represent in the context of earth fault loop impedance testing?

The impedance of the earth fault

The impedance of the supply distribution transformer

The impedance of the sub-station earth

The impedance from the general mass of earth to the point of fault

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