PC Fixture & Appliance Installation Flashcards
6 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 6 PC Fixture & Appliance Installation flashcards as text
When installing a water softener, where should it be positioned relative to the water heater?
Answer: Before the water heater on the cold water supply line
A water softener must be installed on the cold water supply line before the water heater so that softened water enters the heater, preventing scale buildup inside the tank.
A plumber installs a new shower valve. What type of valve is required by code in residential applications to prevent scalding?
Answer: Pressure-balancing or thermostatic mixing valve
Pressure-balancing or thermostatic shower valves are required by code in US residential applications to prevent scalding if toilet flush or other use suddenly changes water pressure.
When installing a garbage disposal, what is the purpose of the dishwasher knockout plug inside the disposal inlet?
Answer: It must be removed if a dishwasher drain will be connected to the disposal
The knockout plug blocks the dishwasher inlet port on the disposal; it must be punched out and removed only if a dishwasher will drain into the disposal.
What is the proper material for making the connection between a copper water supply line and a galvanized steel fitting?
Answer: A dielectric union or dielectric fitting
A dielectric union is required when connecting copper to galvanized steel to prevent electrolytic corrosion caused by the dissimilar metals being in direct contact.
When installing a recirculation pump on a water heater for a hot water recirculation system, where is the pump typically installed?
Answer: On the hot water supply outlet of the heater
The recirculation pump is installed on the hot water outlet of the water heater to push hot water through the loop and return cooled water back to the heater.
A plumber is installing a new bathroom sink drain assembly. What material should NOT be used between the drain body and the porcelain sink surface?
Answer: Plumber's putty on a stone or composite resin sink
Plumber's putty can stain and damage porous materials like stone, composite resin, or certain coated sinks — silicone caulk should be used on these surfaces instead.