CHI CHI Plumbing Systems Inspection 1

Question 1

When inspecting a water heater, what is the minimum required clearance between the relief valve discharge pipe and the floor drain?

Accepted Answer

6 inches

Answer

The TPR valve discharge pipe must terminate within 6 inches of the floor to safely direct scalding water away without creating a hazard.

Question 2

Which pipe material is most commonly identified by its blue or black color and is approved for cold water supply lines in residential construction?

Accepted Answer

PEX

Answer

PEX (cross-linked polyethylene) is commonly color-coded blue for cold water and red for hot water in residential plumbing systems.

Question 3

A home inspector observes that a p-trap under a bathroom sink is installed without a vent pipe. What issue should be documented?

Accepted Answer

Sewer gas infiltration risk

Answer

Without proper venting, negative pressure can siphon water out of the p-trap, allowing sewer gases to enter the living space.

Question 4

What is the maximum water pressure recommended at the point of entry to a residential plumbing system according to most US plumbing codes?

Accepted Answer

80 PSI

Answer

Most US plumbing codes recommend a maximum static water pressure of 80 PSI at the service entry to prevent damage to fixtures and appliances.

Question 5

During a home inspection, the inspector notices galvanized steel supply pipes with visible orange staining at joints. What is the most likely concern?

Accepted Answer

Internal corrosion reducing water flow

Answer

Orange staining at joints of galvanized pipes indicates internal rust and corrosion, which progressively reduces pipe diameter and water flow.

(CHI) Certified Home Inspector Practice Test

(CHI) Certified Home Inspector Practice Test

CHI CHI Plumbing Systems Inspection 1