203 Electrical Installations Technology

Which of the following are classified as a statutory?

• Chemicals or substances hazardous to health (COSHH)

• Guidance notes

• BS7671:2018

• Personal protective equipment (PPE)

Answer explanation

Chemicals or substances hazardous to health (COSHH) and Personal protective equipment (PPE) are statutory regulations aimed at ensuring safety and health in the workplace, while guidance notes and BS7671:2018 are not statutory.

Tags

Regulations

Which of the following are classified as non statutory?

• BS7671:2018

• Codes of practice

• On-Site Guide

• Unite Union Book

Answer explanation

BS7671:2018, Codes of practice, and On-Site Guide are non-statutory documents that provide guidance but are not legally binding. The Unite Union Book is also non-statutory, as it serves as a resource for union members.

Tags

Regulations

What type of diagram shows how a circuit is wired in practice?

• Circuit diagram

• Wiring diagram

• Schematic diagram

• Block diagram

Answer explanation

A wiring diagram shows the physical layout and connections of a circuit, illustrating how components are wired together in practice, making it the correct choice over other types of diagrams.

Tags

Drawings

What type of diagram shows the sequence of equipment?

• Architectural plans

• Schematic diagram

• Block diagram

• Circuit diagram

Answer explanation

A block diagram effectively shows the sequence of equipment by representing components and their relationships in a simplified manner, making it easier to understand the overall system layout.

Tags

Drawings

The length of a road is 380Km If 0.2cm represents 20Km, calculate the length of the road on the map.

• 190

• 0.19

• 19

• 4

Answer explanation

To find the length on the map, first determine how many 20Km segments fit into 380Km: 380Km / 20Km = 19. Since 0.2cm represents 20Km, the length of the road on the map is 19 x 0.2cm = 19cm.

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Symbols & Scales

The dimensions of a building are 125m by 60m. If 5mm represents 10m on a scale drawing, calculate the dimensions of the building on the map.

• 62.5mm by 30mm

• 25mm by 12mm

• 62.5mm by 12mm

• 25mm by 30mm

Answer explanation

To convert the building dimensions to the scale, use the ratio: 5mm = 10m. For 125m, (125/10) * 5 = 62.5mm. For 60m, (60/10) * 5 = 30mm. Thus, the dimensions on the map are 62.5mm by 30mm.

Tags

Symbols & Scales

The number of outlets connected to an A1 ring final circuit is unlimited providing the floor area served does not exceed...

Answer explanation

The number of outlets on an A1 ring final circuit is unlimited as long as the floor area served does not exceed 100m², making 100m² the correct choice.

Tags

Socket Circuits

State the protective device rating for an A3 radial final circuit.

• 16A

• 32A

• 20A

• 40A

Answer explanation

The protective device rating for an A3 radial final circuit is 20A. This rating ensures adequate protection for the circuit while allowing for safe operation of connected devices.

Tags

Socket Circuits

Name one means of heat transference used in space heating.

Answer explanation

In space heating, radiation is a key means of heat transference. Unlike convection, which relies on air movement, radiation transfers heat directly through electromagnetic waves, making it effective in heating spaces.

Tags

Space Heating

State the two classifications for emergency lighting.

Answer explanation

The two classifications for emergency lighting are 'maintained' and 'non-maintained'. The correct term is 'non-maintained', which indicates that the lights only operate during a power failure.

Tags

Alarm And Emergency Systems