Plumbing Plumbing Codes & Safety 3

Question 1

What personal protective equipment (PPE) is most important when soldering copper pipe?

Accepted Answer

Safety glasses and heat-resistant gloves

Answer

Safety glasses protect against flux splatter and hot solder, while heat-resistant gloves protect against burns when handling hot pipe and fittings during sweating operations.

Question 2

What should a plumber do before cutting into any wall or floor to run new pipe?

Accepted Answer

Check for existing utilities using a stud finder, pipe locator, or plans

Answer

Before cutting into any wall or floor, a plumber must verify the location of existing plumbing, electrical wiring, and structural members to avoid dangerous and costly damage.

Question 3

What is the purpose of a sediment trap (dirt leg) on a gas line?

Accepted Answer

To collect debris and moisture before it reaches the gas appliance valve

Answer

A sediment trap (dirt leg) is a downward-pointing nipple and cap installed near gas appliances that collects debris and condensate before they can clog or damage the appliance's gas valve.

Question 4

What chemical is used to test for gas leaks in a plumbing system?

Accepted Answer

Soap solution or electronic leak detector

Answer

A soap solution applied to gas fittings and joints will bubble at any leak point; electronic gas detectors are also used for more sensitive or hard-to-reach inspections.

Question 5

What is the purpose of bonding a metal water pipe system to the electrical ground?

Accepted Answer

To equalize electrical potential and prevent electric shock from stray currents

Answer

Bonding metal pipes to the electrical grounding system equalizes electrical potential across the plumbing system, protecting occupants from electric shock due to stray currents or ground faults.

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Plumbing Practice Test

Plumbing Plumbing Codes & Safety 3