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
Which appliance requires a dedicated CSST or rigid gas supply line with a union or quick-disconnect fitting for service purposes?
Answer: All of the above
All gas appliances that may require servicing or replacement should have an accessible shutoff and a union or quick-disconnect to allow disconnection without cutting pipe.
The maximum distance allowed between the weir of a P-trap and the trap arm connection to the drain stack is governed by the trap-to-vent distance rule. For a 1½-inch trap arm, this distance is typically:
Answer: 3.5 feet
For a 1½-inch trap arm, the maximum trap-to-vent distance is generally 3.5 feet per UPC and IPC tables to maintain the trap seal.
A water softener drain must discharge through an air gap or air break to a:
Answer: Indirect waste receptor
Water softener backwash must discharge indirectly to an approved receptor to prevent backflow and cross-contamination of the potable supply.
What is the purpose of a vacuum breaker on a faucet with a threaded hose connection (sillcock)?
Answer: To prevent backflow if a hose is submerged in contaminated water
A hose-connection vacuum breaker prevents back-siphonage in case a garden hose is left submerged in a pool, bucket, or chemical solution.
When a dishwasher drain connects to a garbage disposal, the high loop or air gap is required to prevent:
Answer: Dirty water from siphoning back into the dishwasher
The high loop or air gap prevents dirty sink water from back-siphoning into the dishwasher tub when the disposal runs or the sink drains.
A clothes washer standpipe must extend above the trap weir a minimum of:
Answer: 18 inches
The standpipe for a clothes washer must extend a minimum of 18 inches above the trap weir to prevent the drain hose from being siphoned into the drain.
Which type of water closet bowl is most effective at preventing visible soiling of the bowl interior?
Answer: Siphon-jet bowl
Siphon-jet bowls have a larger water surface area that covers most of the bowl interior, reducing visible soiling and odor.