CITB CITB Electrical and Mechanical Systems

Question 1

What is the maximum voltage classified as 'low voltage' under US electrical standards used on construction sites?

Accepted Answer

1000V

Answer

110V

Answer

440V

Answer

50V

Question 2

Which color identifies the ground (earth) wire in US construction site wiring?

Accepted Answer

Green or bare copper

Answer

White

Answer

Black

Answer

Red

Question 3

What does GFCI stand for in the context of construction site electrical safety?

Accepted Answer

Ground Fault Circuit Interrupter

Answer

General Fuse Circuit Insulator

Answer

Grounded Fixed Current Indicator

Answer

Ground Frequency Control Interface

Question 4

Under CITB guidance, who is responsible for inspecting temporary electrical installations on a construction site?

Accepted Answer

A competent electrician

Answer

Any site worker

Answer

The project manager only

Answer

The site client

Question 5

What is the purpose of a Permit to Work (PTW) system for mechanical systems on a construction site?

Accepted Answer

To authorize and control high-risk maintenance work safely

Answer

To log overtime hours

Answer

To schedule material deliveries

Answer

To record plant fuel usage

Question 6

Which procedure ensures a mechanical system cannot be accidentally energized while workers are servicing it?

Accepted Answer

Lockout/Tagout (LOTO)

Answer

Toolbox talk

Answer

Risk assessment

Answer

Method statement