Sample Questions - Inspection and Test - Paper 2

On completion of a new installation, the interval before the first periodic inspection would be decided by the:

• installer

• installation designer

• client

• inspection and testing engineer

Any addition to an existing installation should:

• have a similar wiring system to that used in the existing installation.

• be inspected and tested separate from the existing installation.

• not impair the safety of the existing installation.

• have its own energy meter separate from that of the existing installation.

Which of the following duties is ‘not’ the responsibility of the inspector?

• to carry out maintenance and repairs on the installation.

• to compare the test results with the design criteria.

• to advise on remedial works.

• to recommend the immediate isolation of defective parts.

4 - Inspection of a fully enclosed domestic consumer unit would not need verification for:

• identification of conductors

• rating and type of protective devices

• insulation resistance between live conductors and earth

• correct connection of single-pole devices

When inspecting for adequate ‘basic protection’ (protection against electric shock or direct contact) which of the following does not require inspection. Presence and condition of:

• insulation

• enclosures

• barriers

• cpc’s

The measured value of loop impedance for a circuit is 2.4Ω. If the temperature at the time of the test was 20°C and the cable is 70°C (factor 1.2) what is the corrected value. Ze = 0.4Ω:

• 2.88 Ω

• 2.8 Ω

• 2.4 Ω

• 2.0 Ω

Put the following tests in the correct sequence: 1- Continuity of CPC 2- polarity 3- ring circuit continuity 4- prospective fault current

• 1.3.2.4

• 2.4.1.3

• 4.1.3.2

• 4.1.2.3

Before commencing live tests and before energizing the installation, it is vital that you:

• Inform other people in the area.

• Disconnect the earth conductor from the Main Earth Terminal.

• Evacuate the area of the general public.

• Erect barriers around the testing area.

A room in which there is a 13 A socket outlet is to be converted into a bathroom. The socket outlet must be:

• removed from the room.

• moved to become a ceiling socket outlet.

• fitted with a switch.

• moved so as to be more than 3 m from the bath.

Where vertical trunking passes through floors internal fire resistant barriers must be:

• at maximum intervals of 3 m.

• only at the top of the trunking.

• at each floor level.

• mid-way between each floor.