Preview Questions Plumber | Role Specific Skill

Question 1: What is the typical procedure for conducting a vacuum leak test in a vacuum sewer system?

Which action should you take?

Choose only one option

Observing sound levels from within the pipe

Using infrared sensors to detect temperature changes

Using a high-pressure test for leaks

Monitoring the vacuum gauge for pressure changes

Question 2: How do you determine whether a sewer line needs to be replaced or just cleaned?

Which action should you take?

Choose only one option

Inspect with a camera to evaluate pipe integrity

Perform a pressure test to assess the pipe's ability to hold water

Measure the flow rate and compare to standards

Use sound detection to identify weak points

Question 3: 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 4: When using PVC pipes, what is the critical factor in selecting the appropriate solvent cement for joining pipes?

Which action should you take?

Choose only one option

Curing time of the cement

Solvent strength

Viscosity of the cement

Pipe and fitting compatibility

Question 5: What is the recommended action if rusting is discovered on galvanized steel pipes during routine maintenance?

Which action should you take?

Choose only one option

Replace the affected pipes

Install a water softener

Clean the pipes with vinegar

Coat the pipes with anti-corrosion solution

Question 6: What is the required minimum pressure rating for backflow preventers used in commercial plumbing systems as per the UPC?

Which action should you take?

Choose only one option

125 psi

100 psi

150 psi

75 psi