Preview Questions Plumber | Role Specific Skill

Question 1: How do you identify a gas leak in a buried PVC pipe?

Which action should you take?

Choose only one option

Pressurize the pipe and monitor with a manometer

Use a gas detector with a sensitive probe

Insert a dye tracer into the pipe

Monitor for irregular sound patterns

Question 2: What is the maximum safe temperature for PEX pipes in heating systems?

Which action should you take?

Choose only one option

150?F (66?C)

250?F (121?C)

200?F (93?C)

180?F (82?C)

Question 3: What is the recommended tool for bending copper pipes without causing damage?

Which action should you take?

Choose only one option

Pipe cutter

Pipe bender

Pipe reamer

Pipe wrench

Question 4: Which tool is primarily used for detecting gas leaks in copper pipe systems?

Which action should you take?

Choose only one option

Pressure gauge

Hydrogen gas tracer

Ultrasonic leak detector

Helium leak detector

Question 5: When performing a water leak detection test on a drainage system, which pressure test method is commonly used?

Which action should you take?

Choose only one option

Positive pressure test

Hydrostatic pressure test

Dynamic pressure test

Vacuum pressure test

Question 6: What is the required air gap distance for a lavatory fixture to prevent backflow as specified in the National Building Code (NBC)?

Which action should you take?

Choose only one option

2 inches

3 inches

4 inches

1 inch