CMI Electrical Systems Inspection

Question 1

According to NEC 230.79, what is the minimum service ampacity required for a single-family dwelling?

Accepted Answer

100 amps

Answer

60 amps

Answer

150 amps

Answer

200 amps

Question 2

Which type of wiring commonly found in homes built before 1950 is flagged during inspections primarily because it lacks a ground conductor?

Accepted Answer

Knob-and-tube wiring

Answer

Romex (NM-B)

Answer

Aluminum branch-circuit wiring

Answer

BX armored cable

Question 3

Under current NEC standards, bedrooms must be protected by which device to guard against arc-fault-initiated fires?

Accepted Answer

AFCI circuit breakers or combination AFCI devices

Answer

GFCI outlets at the first location in the circuit only

Answer

Standard 15-amp breakers with surge protection

Answer

Double-pole breakers sized at 20 amps

Question 4

A home inspector observes two conductors connected under a single breaker terminal in the main panel. What deficiency does this represent?

Accepted Answer

Double-tapping: two conductors under a terminal not listed for that configuration, creating a fire and fault risk

Answer

Two circuits properly sharing an appropriately rated breaker

Answer

A 240V circuit correctly wired with both legs to one terminal

Answer

A panel that has been properly upgraded to increase capacity

Question 5

Per NEC 240.24, the center of the operating handle of a circuit breaker in the highest position must not exceed what height from the floor?

Accepted Answer

6 feet 7 inches

Answer

5 feet 6 inches

Answer

6 feet 0 inches

Answer

7 feet 0 inches

Question 6

When inspecting bathroom receptacle outlets, which statement best describes the GFCI protection requirement under current NEC?

Accepted Answer

All bathroom receptacle outlets require GFCI protection regardless of distance from water

Answer

GFCI is required only within 3 feet of the sink

Answer

GFCI is required only for outlets adjacent to the bathtub

Answer

GFCI is required only within 6 feet of any water source

Question 7

What is the correct copper wire gauge for a 20-amp dedicated circuit, such as a kitchen small-appliance circuit?

Accepted Answer

12 AWG

Answer

14 AWG

Answer

10 AWG

Answer

8 AWG