PC Preventive Maintenance Procedures 2

Question 1

How often should pressure relief valves on water heaters be manually tested as part of preventive maintenance?

Accepted Answer

Annually

Answer

Pressure relief valves should be tested annually to ensure they open and reseat properly under pressure.

Question 2

What is the primary purpose of flushing a water heater tank during preventive maintenance?

Accepted Answer

Remove sediment buildup from the bottom

Answer

Flushing removes mineral sediment that accumulates at the tank bottom, which reduces efficiency and can cause premature tank failure.

Question 3

During a preventive maintenance inspection of a sewer line, a plumber finds minor root intrusion. What is the recommended first action?

Accepted Answer

Perform hydro-jetting to clear roots and schedule follow-up camera inspection

Answer

Hydro-jetting removes roots and a follow-up camera inspection confirms line clearance and assesses potential pipe damage.

Question 4

What does inspecting the anode rod in a water heater help prevent?

Accepted Answer

Corrosion of the tank interior

Answer

The anode rod sacrificially corrodes to protect the steel tank walls from rust and corrosion.

Question 5

A preventive maintenance checklist for a building's plumbing system should include checking backflow preventer operation. How frequently is annual testing typically required by code?

Accepted Answer

Once per year

Answer

Most jurisdictions require backflow preventers to be tested annually by a certified tester to ensure they are protecting potable water supplies.

(PC) Plumber Certification Practice Test

(PC) Plumber Certification Practice Test

PC Preventive Maintenance Procedures 2