Preview Questions Plumber | Role Specific Skill

Question 1: In commercial buildings, which of the following is not a permissible use of copper pipes under the National Plumbing Code (NPC)?

Which action should you take?

Choose only one option

Gas distribution

Hot water systems

Fire sprinkler systems

Drinking water distribution

Question 2: In large-scale plumbing systems, what is the best method for maintaining trenchless technology pipelines?

Which action should you take?

Choose only one option

Hydrostatic testing with pressure monitoring

Using internal robotic systems for repairs

Routine cleaning with high-pressure water jetting

Regular visual inspection through access points

Question 3: What is the primary cause of water hammer in a plumbing system, and how can it be resolved?

Which action should you take?

Choose only one option

Sudden changes in water flow velocity; installing air chambers

Water pressure drop due to blockages; replacing pipes

Insufficient pipe diameter; enlarging the pipe diameter

Excessive water pressure; installing a pressure-reducing valve

Question 4: What method is used to detect leaks in a pressurized steam system?

Which action should you take?

Choose only one option

Tracer gas injection

Use of ultrasonic sensors

Hydrostatic testing

Visual inspection under UV light

Question 5: What is the required inspection interval for plumbing systems in a newly constructed building before occupancy according to the IPC?

Which action should you take?

Choose only one option

48 hours

24 hours

96 hours

72 hours

Question 6: During maintenance of hot water systems, what is the common cause of reduced water flow in the heater?

Which action should you take?

Choose only one option

Scale buildup

Excessive pressure

Water temperature settings

Corroded pipes