Preview Questions Plumber | Role Specific Skill

Question 1: 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

Question 2: Under plumbing codes, what is the minimum slope required for a drainage pipe in a horizontal installation?

Which action should you take?

Choose only one option

1/8 inch per foot

1/2 inch per foot

3/4 inch per foot

1/4 inch per foot

Question 3: What type of pipe is best suited for underground sewage installations?

Which action should you take?

Choose only one option

Steel

PVC

Copper

Cast iron

Question 4: What is the best practice when maintaining a water pump in a building's plumbing system?

Which action should you take?

Choose only one option

Inspect the pump's motor and replace seals

Ensure proper alignment and lubrication of moving parts

Regularly check the water level and cleanliness

Test the pump with varying pressures

Question 5: What is the maximum permissible length for a horizontal drain line without a vent?

Which action should you take?

Choose only one option

12 feet

10 feet

15 feet

20 feet

Question 6: What is the primary advantage of using PEX tubing for plumbing installations?

Which action should you take?

Choose only one option

Higher water flow

Low cost

Easier to install and bend

Resistant to freezing