Preview Questions Plumber | Role Specific Skill

Question 1: According to the IRC, which of the following is an acceptable method for venting a plumbing system in a building?

Which action should you take?

Choose only one option

Stack venting

Individual venting for each fixture

Loop venting

Combination venting

Question 2: When installing piping systems in multi-story buildings, which factor is most important to ensure proper pipe fitting alignment?

Which action should you take?

Choose only one option

Gravity and vertical alignment

Pipe material strength

Horizontal spacing between pipes

Ambient temperature variations

Question 3: What is the most effective method for preventing clogging in drain lines of a large commercial building?

Which action should you take?

Choose only one option

Regular hydro-jetting

Installing larger diameter pipes

Using bio-enzyme drain cleaners

Using chemical drain cleaners

Question 4: In a multi-story building with multiple water supply lines, how should a plumber ensure even distribution of water pressure throughout the building?

Which action should you take?

Choose only one option

By installing a pressure-reducing valve at the supply entrance

By using a series of pressure tanks along the system

By incorporating a booster pump for each floor

By ensuring pipes are of uniform size and material throughout

Question 5: What is the purpose of using an expansion tank in a closed-loop plumbing system?

Which action should you take?

Choose only one option

To regulate water temperature

To prevent excessive water pressure

To prevent clogs in the pipes

To increase water flow

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