Plumbing Tier 1-Final Exam Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What is the primary purpose of a plumbing system?
✔✔ To provide safe water supply and remove wastewater efficiently.
What material is commonly used for residential water supply pipes?
✔✔ Copper or PEX (cross-linked polyethylene).
What does a trap in a plumbing system do?
✔✔ It prevents sewer gases from entering a building by maintaining a water seal.
What is the standard slope for a drainpipe to ensure proper flow?
✔✔ A 1/4 inch per foot slope.
Why is venting important in a plumbing system?
✔✔ To allow air to enter the system and maintain proper drainage flow.
1
,What is a fixture in plumbing terminology?
✔✔ A device that uses water, such as a sink, toilet, or shower.
What is the function of a water heater?
✔✔ To heat water for domestic use.
What tool is commonly used to cut PVC pipes?
✔✔ A PVC pipe cutter or hacksaw.
What does PSI stand for in plumbing?
✔✔ Pounds per square inch, a measure of pressure.
What is a backflow preventer?
✔✔ A device that prevents contaminated water from flowing back into the clean water supply.
What is the purpose of a shut-off valve?
✔✔ To stop the flow of water to a specific area or fixture.
2
, What is soldering in plumbing?
✔✔ Joining copper pipes by melting solder to create a watertight seal.
Why is pipe insulation important?
✔✔ To prevent freezing in cold weather and reduce heat loss in hot water pipes.
What is the main function of a water meter?
✔✔ To measure the amount of water used in a building.
What is a cleanout in a plumbing system?
✔✔ An access point for removing clogs from the drainage system.
What is the difference between potable and non-potable water?
✔✔ Potable water is safe for drinking, while non-potable water is not.
What is the role of a plumber's tape, also known as Teflon tape?
✔✔ To seal threaded pipe joints and prevent leaks.
3
and Answers | Latest Version | 2024/2025
| Correct & Verified
What is the primary purpose of a plumbing system?
✔✔ To provide safe water supply and remove wastewater efficiently.
What material is commonly used for residential water supply pipes?
✔✔ Copper or PEX (cross-linked polyethylene).
What does a trap in a plumbing system do?
✔✔ It prevents sewer gases from entering a building by maintaining a water seal.
What is the standard slope for a drainpipe to ensure proper flow?
✔✔ A 1/4 inch per foot slope.
Why is venting important in a plumbing system?
✔✔ To allow air to enter the system and maintain proper drainage flow.
1
,What is a fixture in plumbing terminology?
✔✔ A device that uses water, such as a sink, toilet, or shower.
What is the function of a water heater?
✔✔ To heat water for domestic use.
What tool is commonly used to cut PVC pipes?
✔✔ A PVC pipe cutter or hacksaw.
What does PSI stand for in plumbing?
✔✔ Pounds per square inch, a measure of pressure.
What is a backflow preventer?
✔✔ A device that prevents contaminated water from flowing back into the clean water supply.
What is the purpose of a shut-off valve?
✔✔ To stop the flow of water to a specific area or fixture.
2
, What is soldering in plumbing?
✔✔ Joining copper pipes by melting solder to create a watertight seal.
Why is pipe insulation important?
✔✔ To prevent freezing in cold weather and reduce heat loss in hot water pipes.
What is the main function of a water meter?
✔✔ To measure the amount of water used in a building.
What is a cleanout in a plumbing system?
✔✔ An access point for removing clogs from the drainage system.
What is the difference between potable and non-potable water?
✔✔ Potable water is safe for drinking, while non-potable water is not.
What is the role of a plumber's tape, also known as Teflon tape?
✔✔ To seal threaded pipe joints and prevent leaks.
3
