1What is the assigned WSFU value commonly used for a private bathroom group (water closet, lavatory, tub/shower)?
2A pressure-reducing valve (PRV) is installed for what reason?
3Which device protects against backflow on a lawn irrigation system that may contain fertilizer chemicals?
4What is the nominal size of the supply stop (angle stop) commonly serving a lavatory faucet?
5Why is dielectric union or fitting used between copper and galvanized steel pipe?
6What causes water hammer in a supply system?
7What is the maximum developed length of a trap arm typically permitted for a 1-1/4 inch fixture drain?
9What is the minimum size vent for an individual fixture, by general rule?
10What is a branch interval in stack design?
11What does a P-trap look like compared to an S-trap, and why is the P-trap preferred?
12Approved materials for a code-compliant installation are typically identified how?
13What is the minimum clearance generally required in front of a water closet?
14The discharge pipe of a T&P relief valve must NOT do which of the following?
15Why must plumbing fixtures be set level and properly secured?
16What is the typical safe maximum temperature setting for a residential water heater to limit scald risk?
17What is thermal expansion in a closed water heating system?
18What device is added to a closed plumbing system to control thermal expansion?
19A floor drain in a basement should have what to keep its trap seal from evaporating?
20What is the function of the building (house) trap, where used?
21Which is a correct order of pipe sizes from smallest to largest?
22A vacuum breaker on a hose bibb protects against what specific hazard?
23Who is generally responsible for calling for required plumbing inspections?
24What keeps sewer gases from entering through a clothes washer standpipe?
25What is the purpose of a stop-and-waste valve on an outdoor or seasonal line?
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