FREE CBI Electrical and Mechanical Systems Questions and Answers

Question 1

What is the purpose of a circuit breaker in an electrical panel?

Accepted Answer

Prevent overloads and fires

Answer

Reduce electricity bill

Answer

Balance voltage levels

Answer

Control lighting remotely

Question 2

Which color wire is typically used for ground in residential electrical systems?

Accepted Answer

Green or bare

Answer

Black

Answer

Red

Answer

White

Question 3

What is the primary purpose of a GFCI outlet?

Accepted Answer

Protect from electric shock

Answer

Increase voltage output

Answer

Prevent wire corrosion

Answer

Reduce energy consumption

Question 4

In HVAC systems, what is the role of the evaporator coil?

Accepted Answer

Absorb indoor heat

Answer

Distribute air

Answer

Condense refrigerant

Answer

Filter dust particles

Question 5

Which component of a heating system is responsible for combustion?

Accepted Answer

Burner

Answer

Blower

Answer

Heat exchanger

Answer

Thermostat

Question 6

What does an inspector typically check in a mechanical ventilation system?

Accepted Answer

Ductwork and airflow

Answer

Window tinting

Answer

Roofing material

Answer

Soil condition