Preview Questions Plumber | Role Specific Skill

Question 1: What method would you use to prevent leaks in a pressurized piping system in a building with frequent vibrations?

Which action should you take?

Choose only one option

Increase pipe diameter to reduce stress

Use of flexible joints or connectors

Reinforce all joints with epoxy

Use metallic piping only

Question 2: According to the National Plumbing Code, how often should a backflow prevention device be tested?

Which action should you take?

Choose only one option

Every 6 months

Annually

Every 5 years

Every 3 months

Question 3: What is the key consideration when installing gas lines to ensure maximum safety in a residential property?

Which action should you take?

Choose only one option

Use of flexible piping for easy adjustments

Use of galvanized steel for long-term durability

Proper grounding of the system

Proper pipe sizing and leak detection

Question 4: What is the code requirement for water pressure relief valves in commercial water heaters?

Which action should you take?

Choose only one option

They are not required for water heaters

They must be installed on the hot water outlet

They must be installed on both inlet and outlet sides

They must be installed on the cold water inlet

Question 5: What is the most common cause of pressure loss in a plumbing system, and how can it be addressed?

Which action should you take?

Choose only one option

Leaking valves; replacing faulty valve seals

Mineral buildup in pipes; cleaning or replacing the pipes

Aging water meters; recalibrating the meters

Inadequate pipe sizing; increasing pipe diameter

Question 6: How would you fix a leaking threaded joint in a plumbing system?

Which action should you take?

Choose only one option

Tighten the joint with a pipe wrench

Use a larger fitting to cover the leak

Replace the threads

Apply Teflon tape or pipe dope and re-tighten