CHI CHI Plumbing Systems Inspection 2

Question 1

A home inspector tests multiple faucets and finds low water pressure only at hot water fixtures. What is the most likely cause?

Accepted Answer

Failing water heater dip tube

Answer

A broken dip tube in a water heater can shed plastic debris that clogs aerators and cartridges on hot-side fixtures, reducing flow.

Question 2

What is the primary purpose of a backflow preventer installed on an outdoor hose bib?

Accepted Answer

To prevent contaminated water from re-entering the potable supply

Answer

A backflow preventer stops potentially contaminated water (from hoses submerged in pools, buckets, or chemicals) from being siphoned back into the potable water supply.

Question 3

According to standard inspection practice, what minimum drain pipe slope is required for proper gravity drainage in residential construction?

Accepted Answer

1/4 inch per foot

Answer

A slope of 1/4 inch per foot (2% grade) is the standard minimum for residential drain lines to ensure solids are carried along with liquid waste.

Question 4

A home inspector sees water stains on the ceiling below a second-floor bathroom. Which of the following is the FIRST area to investigate?

Accepted Answer

The tub or shower drain collar and caulk lines

Answer

Ceiling stains below a bath typically originate from tub or shower surround leaks at caulk lines or drain collars, which are the most common failure points.

Question 5

Which type of drain line material appears gray in color and was commonly used in homes built between 1978 and 1994 before being linked to joint failures?

Accepted Answer

Polybutylene

Answer

Polybutylene (PB) pipe, typically gray, was widely installed from the late 1970s through the mid-1990s and is known to fail at fittings due to chlorine reactions.

(CHI) Certified Home Inspector Practice Test

(CHI) Certified Home Inspector Practice Test

CHI CHI Plumbing Systems Inspection 2