CITB CITB Electrical and Mechanical Services

Question 1

What minimum distance must be maintained when working near overhead power lines on a US construction site?

Accepted Answer

10 feet

Answer

3 feet

Answer

20 feet

Answer

50 feet

Question 2

Which document governs electrical installations in US construction buildings?

Accepted Answer

NFPA 70 (NEC)

Answer

IBC

Answer

ANSI A10

Answer

OSHA 1926

Question 3

What color is the grounding (earth) wire in a standard US three-wire electrical circuit?

Accepted Answer

Green or bare copper

Answer

White

Answer

Black

Answer

Red

Question 4

What is a Ground Fault Circuit Interrupter (GFCI) used for on construction sites?

Accepted Answer

Protecting against electrocution from ground faults

Answer

Boosting voltage

Answer

Measuring current draw

Answer

Connecting three-phase power

Question 5

Which pipe material is commonly used for domestic cold-water supply in US residential construction today?

Accepted Answer

PEX

Answer

Lead

Answer

Galvanized steel

Answer

Cast iron

Question 6

What does HVAC stand for in the construction and mechanical services trade?

Accepted Answer

Heating, Ventilation, and Air Conditioning

Answer

High Voltage Alternating Current

Answer

Hydraulic Valve and Coolant

Answer

Hazardous Vapor and Chemical