PC Cheat Sheet 2026

The 30 highest-yield PC facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which safety practice is essential for preventing cross-contamination in Plumber Certification? → Proper hand hygiene and equipment sanitation
2. What is the importance of staying current with trends in Material Selection & Properties for Plumber Certification? → It ensures practices remain effective and relevant
3. Which approach best supports quality outcomes in Preventive Maintenance Procedures for Plumber Certification? → Systematic application of evidence-based methods
4. In a multi-story building, a plumber installs a stack that carries both soil and waste. What type of stack is this called? → Soil and waste stack
5. Which skill is most important for success in Installation Techniques within Plumber Certification? → Continuous learning and adaptation
6. When installing a kitchen faucet, what is the purpose of applying plumber's putty under the faucet base? → To create a watertight seal between the faucet base and the sink deck
7. Which method is commonly used to prevent clogging in drainage pipes? → Using drain screens and regular maintenance
8. What is the purpose of a tubing cutter in plumbing? → To cut pipes accurately
9. What does PPE stand for in the context of Plumber Certification safety protocols? → Personal Protective Equipment
10. Which skill is most important for success in Blueprint Reading & Interpretation within Plumber Certification? → Continuous learning and adaptation
11. What is a fundamental principle of Installation Techniques in Plumber Certification practice? → Following established standards and best practices
12. What type of supply connection is required between a gas water heater and the gas supply line to allow for vibration and movement? → CSST flexible gas connector
13. Per the IPC, what is the minimum slope per foot required for a horizontal drain pipe with a 3-inch diameter? → 1/8 inch
14. What action is required when an RPZ assembly's relief valve discharges water continuously during normal operation? → Remove the assembly from service and have it repaired or replaced by a certified tester
15. Which plumbing code is widely followed in the United States? → Uniform Plumbing Code (UPC)
16. What is a fundamental principle of Troubleshooting & Diagnostics in Plumber Certification practice? → Following established standards and best practices
17. What is the primary purpose of conducting a safety audit in Plumber Certification practice? → To identify and mitigate potential hazards
18. Why is it important to regularly maintain plumbing tools? → To ensure functionality and safety
19. Which approach best supports quality outcomes in Material Selection & Properties for Plumber Certification? → Systematic application of evidence-based methods
20. What type of backflow occurs when negative pressure develops in a supply line and draws contaminants backward? → Backsiphonage
21. Which safety practice is essential for preventing cross-contamination in Plumber Certification? → Proper hand hygiene and equipment sanitation
22. When installing a pedestal sink, what must be done to properly support its weight? → Anchor the basin to a wall-mounted blocking or carrier
23. Which tool is commonly used to cut PVC pipes? → Hacksaw or pipe cutter
24. What plumbing code section governs the sizing of water supply piping? → Chapter 6 — Water Supply and Distribution
25. When installing a water softener, where should it be positioned relative to the water heater? → Before the water heater on the cold water supply line
26. What is the primary purpose of conducting a safety audit in Plumber Certification practice? → To identify and mitigate potential hazards
27. Which of the following requires a permit in most US jurisdictions according to plumbing codes? → Installing a new water heater
28. Which tool is commonly used to tighten or loosen threaded pipes? → Pipe wrench
29. What is the standard slope required for proper drainage in a horizontal drainpipe? → 1/4 inch per foot
30. What is a cross-connection in a plumbing system? → Any physical link between a potable water supply and a potentially contaminated source