G28 Journeyman Plumber with Gas Exam

G28 Journeyman Plumber with Gas Exam

• Which tool is most suitable for cutting PVC pipes quickly and smoothly? A. Hacksaw
• Pipe cutter
• Reciprocating saw
• Tubing bender

Answer: B

Explanation: A specialized PVC pipe cutter is designed to make clean, even cuts without leaving burrs or rough edges.

• Which of the following is a key safety measure when handling power tools during plumbing

work? A. Wearing open-toed shoes for quick movement

• Using dull blades to reduce kickback
• Always using protective gloves and goggles
• Storing tools on wet surfaces

Answer: C

Explanation: Proper protective equipment such as gloves and goggles prevents injuries from debris, splinters, and other hazards.

• Which pipe material is best known for its corrosion resistance in plumbing systems? A.

Galvanized steel

• Cast iron
• Copper

D. PEX 1 / 4

G28 Journeyman Plumber with Gas Exam

Answer: D

Explanation: PEX is highly resistant to corrosion, making it a popular choice for modern plumbing installations.

• What should a plumber do first when verifying local plumbing code requirements? A. Begin

work and see if there are any complaints

• Look up the current adopted code for the jurisdiction
• Assume the National Code is sufficient everywhere
• Skip code checks to save time

Answer: B

Explanation: Plumbing codes can vary by location, so confirming the most recent local code ensures compliance.

• Which instrument is essential for accurate pipe measurements in plumbing? A. A rough

estimate

• A tape measure
• A metal file
• A chisel

Answer: B

Explanation: A tape measure is the standard tool for making precise measurements, critical for proper installation and fitting.

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G28 Journeyman Plumber with Gas Exam

• Which of the following describes an essential feature of cast iron piping? A. Lightweight and

flexible

• High tolerance to extreme heat and strong structural integrity
• Exclusively used for potable water supply
• Inferior for drain, waste, and vent systems

Answer: B

Explanation: Cast iron piping is heavy, durable, and can handle high temperatures, making it common in drainage systems.

• What is one main purpose of a plumbing code inspection? A. To encourage the plumber to

cut corners

• To ensure proper licensing fees are collected
• To verify that installations meet safety and health standards
• To delay job completion unnecessarily

Answer: C

Explanation: Inspections ensure the plumbing work complies with safety, health, and code requirements to protect occupants.

• Which tool is most helpful for tightening large hex fittings or valves in plumbing? A. Pipe

wrench

• Needle-nose pliers
• Wire stripper 3 / 4

G28 Journeyman Plumber with Gas Exam

• Hacksaw

Answer: A

Explanation: A pipe wrench has an adjustable jaw and strong grip, ideal for tightening or loosening large, heavy fittings.

• When transporting PVC cement, what key safety practice should be followed? A. Store in a

cardboard box with no lid

• Keep away from sparks or open flames
• Place near high heat to soften it
• Dispose of immediately after purchase

Answer: B

Explanation: PVC cement is flammable; it must be kept away from ignition sources to prevent fires and ensure safety.

• What is the main reason copper tubing is still popular for water supply lines? A. It’s the

cheapest option

• It easily corrodes
• It’s resistant to corrosion and can handle high temperatures
• It cannot be soldered

Answer: C

Explanation: Copper resists corrosion well and tolerates high temperatures, making it a reliable material for water supply.

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