Inspection & Quality Control 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 Inspection & Quality Control flashcards as text
An inspector finds that a bathtub drain overflow plate is missing after the final finish work. Why is this a code violation?
Answer: It leaves an open penetration in the tub wall that could allow sewer gas to enter the bathroom
The overflow plate covers the access to the overflow tube; without it, sewer odors and gas can enter the bathroom through the open fitting.
During inspection of a multi-story building's soil stack, the inspector requires that a stack vent or stack cleanout be accessible at each floor. What is the code rationale?
Answer: To enable clearing of blockages without demolishing walls or ceilings
Cleanouts at each floor of a soil stack allow plumbers to snake blockages from the nearest cleanout above the obstruction, avoiding unnecessary demolition.
A plumber installs a dishwasher drain that connects directly to the drain tailpiece of the kitchen sink without a high loop or air gap. What does the inspector cite?
Answer: A potential cross-connection allowing contaminated drain water to back-siphon into the dishwasher
Without a high loop or air gap, a backed-up or siphoning sink drain can push contaminated water back into the dishwasher, creating a cross-connection violation.
What is the inspector verifying when confirming that a vacuum breaker is installed on a hose bibb?
Answer: That the hose bibb is protected from backflow if a hose is submerged in a contaminated source
A vacuum breaker prevents back-siphonage through a garden hose from a pool, pond, or chemical sprayer back into the potable water supply.
An inspector checks the support spacing for cast iron soil pipe suspended from the structure. Which standard applies?
Answer: Support every 4 feet for horizontal runs and at each floor for vertical runs
Cast iron soil pipe must be supported at maximum 5-foot intervals horizontally (IPC; some codes allow 4 feet) and at each floor level for vertical runs to prevent sag and joint stress.
When inspecting a newly installed tankless water heater, what is the inspector verifying regarding the gas supply line?
Answer: That the gas supply capacity (BTU/hr) and pipe diameter meet the heater's maximum demand rating
Tankless heaters have high BTU demands; the inspector confirms that the gas pipe size and meter capacity can supply the heater's full firing rate without excessive pressure drop.
An inspector rejects a rough-in because a horizontal branch drain runs parallel to and directly below an electrical conduit with no separation. What is the primary concern?
Answer: Drain leaks or condensation could drip onto electrical components and cause shock or fire hazards
Plumbing leaks above electrical conduit create electrocution and fire risks; codes require adequate clearance or protective separation between plumbing and electrical systems.