Inspection and Testing Quiz

Which document must be completed and issued after the initial verification of a new electrical installation?

• Minor Electrical Installation Works Certificate

• Electrical Installation Certificate

• Periodic Inspection Report

• Building Regulations Certificate

What is the primary purpose of insulation resistance testing in an electrical installation?

• To check the continuity of conductors

• To ensure there are no short circuits or earth faults

• To measure the voltage drop

• To test the operation of RCDs

Which instrument is typically used to measure earth loop impedance?

• Insulation resistance tester

• Continuity tester

• Earth loop impedance tester

• Clamp meter

What is the minimum insulation resistance value required for a new domestic installation at 500V DC, according to BS 7671?

• 0.5 MΩ

• 1.0 MΩ

• 2.0 MΩ

• 5.0 MΩ

Which regulation covers the requirements for initial verification of an electrical installation?

• BS 7671 Regulation 411

• BS 7671 Regulation 612

• BS 7671 Regulation 522

• BS 7671 Regulation 701

What is the correct sequence for dead testing during initial verification?

• Continuity, insulation resistance, polarity

• Polarity, insulation resistance, continuity

• Insulation resistance, continuity, polarity

• Continuity, polarity, insulation resistance

Which of the following is NOT a live test?

• Earth loop impedance

• RCD testing

• Continuity of protective conductors

• Prospective short-circuit current

What is the main reason for carrying out a polarity test?

• To check the earth continuity

• To ensure fuses and switches are connected in the line conductor

• To measure insulation resistance

• To test RCD operation

Which of the following is the correct formula for calculating resistance using Ohm’s Law?

What is the maximum disconnection time for a 230V final circuit not exceeding 32A in a TN system, according to BS 7671?

• 0.1 seconds

• 0.2 seconds

• 0.4 seconds

• 5 seconds