Preview Questions Plumber | Role Specific Skill

Question 1: In the maintenance of gas lines, what is the most critical safety procedure to follow during an inspection?

Which action should you take?

Choose only one option

Ventilate the area

Turn off the gas supply

Check for gas odor

Use a gas leak detector

Question 2: What is the most common cause of clogged drains in a commercial building's restroom plumbing?

Which action should you take?

Choose only one option

Pipe misalignment

Excessive use of paper products

Improper installation of vents

Chemical buildup

Question 3: What is the minimum size of a vent pipe according to most building codes for a residential plumbing system?

Which action should you take?

Choose only one option

1 1/2 inches

4 inches

3 inches

2 inches

Question 4: In a high-rise building, which method should be used to prevent backflow contamination in the plumbing installation for drinking water?

Which action should you take?

Choose only one option

Use of lead-free soldering for joints

Install a backflow preventer valve

Use anti-siphon piping

Install air gaps in all potable water outlets

Question 5: Which of the following is the most effective way to detect leaks in a water supply system?

Which action should you take?

Choose only one option

Dye testing

Acoustic leak detection

Thermal imaging

Pressure testing

Question 6: In pipe fitting, what is the correct method for joining copper pipes using soldering?

Which action should you take?

Choose only one option

Use of flux and heat without applying solder

Press-fit joints with no heat required

Using a pipe bender and welding the joint

Heat the joint, apply solder, and allow to cool