Electrical System Designs

What is the British standard number for the IET Wiring Regulation?

• BS 5626

• BS 5839

• BS 7671

• BS 7909

Which document is statutory?

• IET Wiring Regulation

• IET On-site Guide

• Electricity at work Regulations

• HSE Electricity Safety Guide

What should be undertaken before any work task is carried out on a construction site?

• A review of the risk assessment

  specific to the task

• Complete an inventory of all stock kept and stored on site

• Ensure that all electrical supplies are on and suitable.

• Completion of an operations and maintenance

A fault of negligible impedance between line and neutral due to insulation failure is define as;

• An overload

  
  

• An earth fault

• A short circuit

• An open circuit

Which type of circuit breaker is the most suitable for a new domestic type installation?

• Type A

• Type B

• Type C

• Type D

What type of fuse is a BS 3036 device?

• High breaking capacity fuse

• Semi-enclosed re-wireable fuse

• Cartridge fuse for fused connection units

• DNO cartridge fuses found in service heads

What is the rated short circuit capacity of a BS-3 type fuse as given in the IET On-site Guide?

• 16 KA

• 16.5 KA

• 31.5 KA

• 50 KA

What is satisfied when a fault causes disconnection of a protective device local to the load?

• Diversity

• Segregation

• Selectivity

• Separation

What is defined as a circuit linking two distribution boards together in a dwelling?

• A final circuit

• An earthing arrangement

• A distribution circuit

• A safety circuit

What would normally be used to maintain a constant supply to information technology equipment during power failures?

• Photovoltaic generators

• A non-auto start standby generator

• An emergency lighting system

• An uninterruptible power supply