Gas Piping Materials and Installation: Master the Basics

Question 1

Which of the following materials is not suitable for gas piping due to its poor corrosion resistance?

Accepted Answer

PVC

Answer

Copper

Answer

Polyethylene

Answer

Galvanized steel

Question 2

What is the key benefit of utilizing copper for gas piping systems?

Accepted Answer

Enhanced corrosion resistance

Answer

Exceptional flexibility

Answer

Reduced material cost

Answer

Increased tensile strength

Question 3

Among the following steel types, which is the most common choice for gas piping due to its corrosion resistance?

Accepted Answer

Stainless steel

Answer

Carbon steel

Answer

Galvanized steel

Answer

Alloy steel

Question 4

Which type of fitting is specifically designed to connect two sections of gas piping at a right angle?

Accepted Answer

Elbow

Answer

Tee

Answer

Coupling

Answer

Reducer

Question 5

Which specialized tool is primarily used for cutting gas piping?

Accepted Answer

Pipe cutter

Answer

Hacksaw

Answer

Grinder

Answer

Reciprocating saw

Question 6

What is the primary function of a gas meter in a gas piping system?

Accepted Answer

Measuring gas consumption volume

Answer

Regulating gas pressure levels

Answer

Preventing gas leaks

Answer

Removing impurities from gas

Question 7

In the United States, what is the standard color code for identifying gas piping?

Accepted Answer

Yellow

Answer

Red

Answer

Green

Answer

Orange

Question 8

Which of the following is **not** a commonly used material for gas piping?

Accepted Answer

Polyvinyl chloride (PVC)

Answer

Copper

Answer

Steel

Answer

Polyethylene

Question 9

Which material is known for its corrosion resistance and flexibility, making it suitable for underground installations?

Accepted Answer

Polyethylene

Answer

Copper

Answer

Steel

Question 10

What type of fitting is used to connect two pieces of pipe that are in a straight line, without changing direction?

Accepted Answer

Coupling

Answer

Elbow

Answer

Tee

Question 11

Which type of gas piping system is typically used for underground installations, due to its resistance to corrosion and the ability to withstand soil movement?

Accepted Answer

Polyethylene

Answer

Copper

Answer

Steel

Question 12

Which tool is specifically designed for cutting and shaping gas piping, providing precise and clean cuts?

Accepted Answer

Pipe cutter

Answer

Hacksaw

Answer

Circular saw

Question 13

What is the primary purpose of a gas leak detector installed in a gas piping system?

Accepted Answer

To detect the presence of gas leaks, alerting occupants to potential hazards

Answer

To shut off the gas supply in the event of a leak, preventing further gas flow

Answer

To repair gas leaks automatically, ensuring the safety of the gas piping system

Question 14

Which of the following gas pipe materials is known for its corrosion resistance and flexibility?

Accepted Answer

Polyethylene (PE)

Answer

Copper

Answer

Steel

Answer

Cast iron

Question 15

Which type of gas valve is designed to shut off gas flow automatically during an earthquake?

Accepted Answer

Seismic valve

Answer

Gate valve

Answer

Globe valve

Answer

Ball valve

Question 16

Which type of gas piping is most commonly used in residential applications?

Accepted Answer

Copper tubing

Answer

Black iron pipe

Answer

Galvanized steel pipe

Answer

Polyethylene pipe

Question 17

What is the primary purpose of a gas pressure regulator?

Accepted Answer

To reduce gas pressure

Answer

To control gas flow

Answer

To measure gas flow

Answer

To prevent gas leaks

Question 18

Which type of gas pipe fitting is used to change the direction of a gas line?

Accepted Answer

Elbow

Answer

Tee

Answer

Union

Answer

Reducer

Question 19

Which of the following is NOT an advantage of using copper for gas piping?

Accepted Answer

Low cost

Answer

Corrosion resistance

Answer

Ease of working

Answer

High strength

Question 20

What is the primary benefit of using steel for gas piping?

Accepted Answer

Strength

Answer

Flexibility

Answer

Corrosion resistance

Answer

Low maintenance

Question 21

Which type of gas piping material is known for its flexibility and versatility?

Accepted Answer

Polyethylene

Answer

Copper

Answer

Steel

Answer

Cast iron

Question 22

Which tool is used to flare the ends of copper tubing?

Accepted Answer

Flaring tool

Answer

Pipe cutter

Answer

Tubing bender

Answer

Crimping tool

Question 23

What is the purpose of a drip leg in a gas piping system?

Accepted Answer

To collect condensation and prevent freezing

Answer

To regulate gas flow

Answer

To provide support for the pipe

Answer

To prevent corrosion

Question 24

Which type of gas piping material is known for its flexibility and is easy to install?

Accepted Answer

Polyethylene

Answer

Copper

Answer

Steel

Question 25

Which type of gas pipe joint is created by joining metal to metal through the application of heat?

Accepted Answer

Soldered joint

Answer

Flared joint

Answer

Mechanical joint

Answer

Compression joint

Question 26

What is the primary purpose of a gas pressure regulator?

Accepted Answer

To reduce gas pressure to a safe level for use with appliances

Answer

To prevent gas leaks

Answer

To control the flow of gas

Question 27

What is a primary reason for using a riser in gas piping systems?

Accepted Answer

To facilitate vertical piping runs

Answer

To reduce pressure

Answer

To prevent leaks

Answer

To increase gas flow

Question 28

What type of pipe sealant is specifically designed for gas piping applications?

Accepted Answer

Gas line sealant

Answer

Caulking

Answer

Teflon tape

Answer

Loctite

Question 29

Which material is commonly NOT utilized for gas piping?

Accepted Answer

Aluminum

Answer

Copper

Answer

Polyethylene

Answer

Steel

Question 30

Which type of gas pipe exhibits flexibility and is impervious to corrosion?

Accepted Answer

Polyethylene

Answer

Black iron

Answer

Galvanized steel

Answer

Copper

Question 31

When installing black iron pipe, which type of joint sealant should be applied?

Accepted Answer

Pipe dope

Answer

Anaerobic sealant

Answer

Teflon tape

Answer

Caulk

Question 32

According to industry standards, what is the maximum allowable distance between support points for horizontal gas piping?

Accepted Answer

12 feet

Answer

8 feet

Answer

10 feet

Answer

14 feet

Question 33

What is the primary purpose of using a flaring tool when installing copper gas piping?

Accepted Answer

To create a flared end for secure connections

Answer

To cut the pipe to length

Answer

To clean the pipe

Answer

To bend the pipe

Question 34

Which tool is used to effectively cut and thread steel gas pipe?

Accepted Answer

Pipe cutter and threading machine

Answer

Sawzall and grinder

Answer

Hacksaw and tap

Answer

Shears and pliers

Question 35

What is the function of a gas pressure regulator?

Accepted Answer

To maintain a constant gas pressure supply to appliances

Answer

To shut off the gas supply in an emergency

Answer

To control the flow of gas

Answer

To detect gas leaks

Question 36

Which type of copper pipe is most suitable for underground gas piping and why?

Accepted Answer

Type K (Hard)

Answer

Type DWV (Drain, Waste, and Vent)

Answer

Type L (Light)

Answer

Type M (Soft)

Question 37

Which of the following is a primary advantage of using steel gas pipe?

Accepted Answer

High strength and durability

Answer

Corrosion resistance

Answer

Low cost

Answer

Flexibility

Question 38

Which type of fitting is used to create a 90-degree bend in gas piping?

Accepted Answer

Elbow

Answer

Cross

Answer

Tee

Question 39

What is the purpose of a dielectric union in a gas piping system?

Accepted Answer

To prevent galvanic corrosion between dissimilar metals

Answer

To provide a shut-off point in the system

Answer

To connect different types of pipe materials

Answer

To accommodate thermal expansion and contraction

Question 40

Which of the following regulations governs the installation of gas piping materials and systems?

Accepted Answer

National Fuel Gas Code (NFPA 54)

Answer

Universal Building Code (UBC)

Answer

National Electrical Code (NEC)

Answer

International Plumbing Code (IPC)

Question 41

Which gas piping material offers the highest resistance to corrosion?

Accepted Answer

Copper

Answer

Galvanized steel

Answer

Polyethylene

Answer

Steel

Question 42

Which type of fitting is commonly employed to connect steel gas piping?

Accepted Answer

Threaded fitting

Answer

Compression fitting

Answer

Soldered fitting

Answer

Push-fit fitting

Question 43

What is the minimum depth at which polyethylene gas piping must be buried underground to ensure its protection?

Accepted Answer

18 inches (457 mm)

Answer

24 inches (610 mm)

Answer

12 inches (305 mm)

Question 44

Which tool is specifically designed for cutting copper tubing?

Accepted Answer

Tubing cutter

Answer

Hacksaw

Answer

Tin snips

Answer

Pipe wrench

Question 45

What is the primary function of a drip leg in a gas piping system?

Accepted Answer

To collect and drain condensation, preventing it from entering gas appliances

Answer

To provide a vent for gas leaks

Answer

To regulate gas pressure

Question 46

Which type of gas valve is typically used to control the flow of gas to individual gas appliances?

Accepted Answer

Manual shut-off valve

Answer

Pressure relief valve

Answer

Check valve

Answer

Safety relief valve

Question 47

What is the primary purpose of a gas meter in a gas piping system?

Accepted Answer

To measure the volume of gas consumed

Answer

To filter impurities from gas

Answer

To regulate gas pressure

Answer

To prevent gas leaks

Question 48

Which type of gas piping is commonly used for outdoor installations due to its resistance to environmental factors?

Accepted Answer

Polyethylene

Answer

Steel

Answer

Copper

Answer

Galvanized steel

Question 49

When choosing gas pipe materials, what is the most crucial factor to consider?

Accepted Answer

Corrosion resistance

Answer

Ease of installation

Answer

Material cost

Answer

Aesthetic appeal

Question 50

Which type of pipe material is commonly used for underground gas distribution lines?

Accepted Answer

Polyethylene (PE)

Answer

Polyvinyl chloride (PVC)

Answer

Steel

Answer

Copper

Question 51

What is the primary purpose of black iron pipe in gas installations?

Accepted Answer

Gas distribution lines

Answer

Waste drainage pipes

Answer

Water supply lines

Answer

Electrical conduit

Question 52

What essential procedure is used to ensure a safe and leak-free gas pipe installation?

Accepted Answer

Pressure testing

Answer

Sanding

Answer

Priming

Answer

Painting

Question 53

What type of joint is commonly used to connect copper gas pipes?

Accepted Answer

Soldered joint

Answer

Compression fitting

Answer

Threaded joint

Answer

Grooved joint

Question 54

Which code or standard is primarily responsible for governing gas piping installation in the United States?

Accepted Answer

International Fuel Gas Code (IFGC)

Answer

American Society of Mechanical Engineers (ASME)

Answer

Uniform Plumbing Code (UPC)

Answer

National Electrical Code (NEC)

Question 55

Which type of gas pipe is most vulnerable to corrosion?

Accepted Answer

Steel

Answer

Copper

Answer

Polyethylene (PE)

Answer

PVC