NHIE Building Systems and Components 2

Question 1

What is the minimum recommended clearance between the bottom of floor joists and the ground in a crawl space?

Accepted Answer

18 inches

Answer

IRC and most standards require at least 18 inches of clearance between the bottom of floor joists and the ground in a crawl space to allow for inspection and ventilation.

Question 2

Which type of pipe material is identified by its blue or blue-striped color?

Accepted Answer

PEX-B cold water

Answer

PEX tubing for cold water lines is typically blue, while red indicates hot water lines, helping installers and inspectors quickly identify the system.

Question 3

When inspecting a gas furnace, which condition would indicate a cracked heat exchanger?

Accepted Answer

Flame rollout when blower activates

Answer

Flame rollout when the blower turns on is a classic sign of a cracked heat exchanger, as combustion gases escape into the air distribution system.

Question 4

What is the purpose of a P-trap in a plumbing drain system?

Accepted Answer

Hold water to block sewer gases from entering the home

Answer

A P-trap retains a small amount of water that acts as a seal, preventing sewer gases from passing through the drain and entering the living space.

Question 5

An inspector notices the main electrical panel has double-tapped breakers. What does this mean?

Accepted Answer

Two circuits share one breaker

Answer

Double-tapping means two separate conductors are connected to a single breaker terminal, which is a defect unless the breaker is specifically rated for multiple conductors.

(NHIE) National Home Inspector Examination Practice Test

(NHIE) National Home Inspector Examination Practice Test

NHIE Building Systems and Components 2