unit 203

Which non-statutory publication gives guidance on the methods of inspecting and testing new installations?

• EWR

• BS 7671

• HSE GS 38

• On-Site Guide

What type of diagram provides detailed information showing how components are connected together, including which terminal connects to another?

• Schematic diagram

• Site plan

• Circuit diagram

• Sketch plan

An internal wall measures 20cm on a drawing and 10m in actual size. What drawing scale is being used?

• 1:20

• 1:50

• 1:100

• 1:500

What is transmission voltage?

• 400V

• 11000V

• 25000V

• 400000V

Which is renewable energy source?

• Gas

• Oil

• Solar

• Coal

Which is an extraneous conductive part?

• Metal conduit

• Steel trunking

• Plastic pipework

• Copper service pipes

What is the maximum permitted disconnection time for 6A circuit supplying luminaires in a commercial installation forming part of a TN-C-S earthing arrangement?

• 0.4s

• 0.8s

• 1s

• 5s

What is the maximum rating of RCD permitted where additional protection is required for 32A socket-outlet circuits?

• 30mA

• 150mA

• 300mA

• 500mA

What symbol is used for total earth fault loop impedance?

• Ze

• R1

• R2

• Zs

What device is used to provide isolation by an electrician for an entire electrical installation?

• Suppliers meter

• Circuit RCBO's

• Main Switch

• DNO fuse