NHIE Plumbing 4

Question 1

What is the minimum distance a vent pipe termination must be from an operable window or door opening?

Accepted Answer

3 feet

Answer

Vent pipe terminations must be at least 3 feet away from any opening (window, door, or air intake) to prevent sewer gases from entering the building.

Question 2

A home inspector observes a washing machine drain hose inserted into a standpipe that is only 18 inches tall. What is the concern?

Accepted Answer

The standpipe is too short and may allow wastewater to overflow or siphon

Answer

A washing machine standpipe must be at least 18–42 inches tall (per most codes), and the drain hose must not be inserted so deep as to create a seal that causes siphoning.

Question 3

What is the most likely cause of low water pressure at a single fixture while pressure at other fixtures is normal?

Accepted Answer

A partially closed supply valve or mineral-clogged aerator at that fixture

Answer

When pressure is low at only one fixture, a locally restricted aerator or partially closed valve is the most probable cause.

Question 4

During a home inspection, a gas water heater is found in a bedroom closet without any combustion air provisions. What is the primary hazard?

Accepted Answer

Insufficient combustion air can cause incomplete combustion, producing carbon monoxide

Answer

A gas appliance in a confined space without adequate combustion air can produce carbon monoxide from incomplete combustion, which is a life-safety hazard.

Question 5

Which of the following is a required safety feature on a temperature and pressure relief (TPR) valve discharge pipe?

Accepted Answer

The pipe must terminate within 6 inches of the floor or to the exterior, not be capped or reduced in size

Answer

TPR valve discharge pipes must terminate near the floor or exterior to safely direct scalding water away from occupants, and must never be capped, plugged, or reduced.

(NHIE) National Home Inspector Examination Practice Test

(NHIE) National Home Inspector Examination Practice Test

NHIE Plumbing 4