Plumbing Fixtures and Appliances Flashcards
7 cards from real Master Plumber Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Plumbing Fixtures and Appliances flashcards as text
Under the International Plumbing Code, what is the minimum clearance from the centerline of a water closet to a side wall or obstruction?
Answer: 15 inches
The IPC requires a minimum 15-inch clearance from the water closet centerline to any side wall or obstruction.
A tankless (on-demand) water heater differs from a storage water heater primarily because it:
Answer: Heats water only as it flows through the unit with no storage tank
Tankless water heaters heat water on demand as it flows through a heat exchanger, eliminating standby heat loss associated with storage tanks.
A relief valve on a water heater must be set to open at or below which temperature?
Answer: 180°F
Temperature and pressure relief (TPR) valves on water heaters must be set to open at or below 210°F (some codes say 200°F) to prevent dangerous steam buildup.
What fitting is NOT permitted for use as the sole trap for a bathtub under most US plumbing codes?
Answer: S-trap
S-traps are prohibited because they tend to self-siphon due to the downward flow geometry, destroying the water seal.
A solar water heating system's backup electric element is classified under plumbing codes as a:
Answer: Pressure vessel subject to TPR valve requirements
Solar water heater storage tanks are pressure vessels and must be equipped with temperature and pressure relief valves per plumbing code.
Which urinal type uses little or no water and relies on a chemical sealant trap to block sewer gases?
Answer: Waterless urinal
Waterless urinals use a floating chemical sealant liquid in the trap that allows urine to pass through but blocks sewer gases from rising.
When installing a pedestal lavatory, the supply rough-in height from the finished floor is typically:
Answer: 20 inches
Supply rough-in for a pedestal lavatory is typically at 20 inches AFF to align with the fixture's internal supply connection.