Plumber Safety & Code Compliance Flashcards
7 cards from real PC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Plumber Safety & Code Compliance flashcards as text
According to the IPC, what is the minimum vent pipe size for a water closet (toilet)?
Answer: 2 inches
The IPC requires a minimum 2-inch vent for water closets because they are high-volume fixtures that require adequate air circulation to drain properly.
A plumber is installing a hot water distribution system in a healthcare facility. Which cross-connection control device is required on the inlet to a dental chair water unit?
Answer: Reduced pressure zone device (RPZ)
Healthcare facilities require reduced pressure zone (RPZ) backflow preventers at high-hazard cross-connections like dental equipment due to the risk of pathogen contamination.
What does the 'wet vent' system allow that traditional individual venting does not?
Answer: A drain pipe to also serve as the vent for an upstream fixture
A wet vent permits a single pipe to simultaneously function as a drain for one fixture and a vent for another fixture located upstream.
When installing copper tubing in a concrete slab, which type of copper tube is required?
Answer: Type K annealed (soft)
Type K soft (annealed) copper is required for underground or embedded-in-concrete installations because it offers the greatest wall thickness and can be bent without fittings.
Under OSHA 29 CFR 1926, a trench that is 8 feet deep in Type C soil must be protected by which method?
Answer: Trench box or sloping at 1.5:1 (H:V) ratio
Type C soil (the least stable) requires a 1.5:1 horizontal-to-vertical slope or an equivalent protective system such as a trench box or shoring.
Which code requirement applies to the installation of a water closet flange relative to the finished floor level?
Answer: The flange must be 1/4 to 1/2 inch above the finished floor
The IPC and most codes require closet flanges to be set 1/4 to 1/2 inch above the finished floor to ensure a proper wax ring seal and prevent rocking.
What is the required action when a plumber finds that a previously installed gas appliance does not have the required bonding and grounding connections during service work?
Answer: Tag the appliance as unsafe and notify the customer before restoring gas service
A plumber who discovers missing bonding and grounding must tag the appliance as unsafe and inform the customer before restoring gas service to prevent shock and explosion hazards.