Gas Piping Materials and Fittings: Comprehensive Quizzes for Exam Success

Question 1

Which of the following is a common type of gas piping material used for residential applications?

Accepted Answer

Copper

Answer

Polypropylene

Answer

PVC

Answer

Concrete

Question 2

According to industry standards, what is the maximum recommended distance between supports for a horizontal gas pipe?

Accepted Answer

10 feet

Answer

6 feet

Answer

15 feet

Answer

20 feet

Question 3

Which type of fitting is used to change the direction of a gas pipe by 90 degrees?

Accepted Answer

Elbow

Answer

Tee

Answer

Union

Answer

Cap

Question 4

Who is responsible for creating and updating the National Fuel Gas Code, which establishes safety guidelines for gas piping systems?

Accepted Answer

National Fire Protection Association (NFPA)

Answer

American Society of Plumbing Engineers (ASPE)

Answer

American Gas Association (AGA)

Question 5

What is the main purpose of gas leak detection systems in gas piping networks?

Accepted Answer

Detect gas leaks

Answer

Monitor gas pressure

Answer

Control gas flow

Answer

Measure gas consumption

Question 6

Which material is most commonly used for underground gas piping due to its flexibility and corrosion resistance?

Accepted Answer

Polyethylene (PE)

Answer

Galvanized steel

Answer

Copper

Question 7

What type of fitting is used to permanently join two pieces of copper pipe without the use of threads or compression?

Accepted Answer

Solder joint

Answer

Flare fitting

Answer

Threaded fitting

Answer

Compression fitting

Question 8

Which of the following is a primary advantage of using galvanized steel for gas piping systems?

Accepted Answer

Enhanced corrosion resistance due to the protective zinc coating

Answer

Low initial cost compared to other materials

Answer

Ease of installation due to lightweight properties

Answer

Flexibility, allowing for easier bending and shaping

Question 9

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

Accepted Answer

To manually control the flow of gas by opening or closing the valve

Answer

To protect the piping from corrosion and rust

Answer

To join two sections of gas piping together

Answer

To reduce the pressure of the gas flowing through the system

Question 10

Which type of gas piping is known for its rigidity and ability to withstand high pressure?

Accepted Answer

Black iron pipe

Answer

Corrugated stainless steel tubing (CSST)

Answer

Polyethylene (PE) pipe

Question 11

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

Accepted Answer

To accurately measure the volume of gas consumed by a building or appliance

Answer

To prevent gas leaks and ensure a safe gas supply

Answer

To regulate the pressure of the gas flowing through the system

Question 12

Which material is NOT commonly used for gas piping?

Accepted Answer

PVC

Answer

Stainless steel

Answer

Black iron

Answer

Copper

Question 13

What type of fitting is used to connect two pipes of the same diameter and create a straight run?

Accepted Answer

Straight coupling

Answer

Union

Answer

Tee

Answer

Elbow

Question 14

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

Accepted Answer

To prevent galvanic corrosion between dissimilar metals.

Answer

To connect pipes of different diameters.

Answer

To allow for expansion and contraction of the piping system.

Question 15

Which of the following is a critical safety requirement for gas piping systems?

Accepted Answer

All gas piping must be pressure tested and inspected before being put into service.

Answer

Gas piping can be installed in any location within a building.

Answer

Flexible gas piping can be used for all types of gas appliances.

Question 16

What type of fitting is used to change the direction of a pipe run by 90 degrees?

Accepted Answer

Elbow

Answer

Reducer

Answer

Coupling

Answer

Tee

Question 17

Which of the following is a type of flexible gas piping approved for use in residential and commercial buildings?

Accepted Answer

Corrugated stainless steel tubing

Answer

Copper tubing

Answer

PVC pipe

Question 18

Which of the following is NOT a factor to consider when selecting gas piping materials?

Accepted Answer

Aesthetics

Answer

Flexibility

Answer

Corrosion resistance

Question 19

What is the primary function of a gas cock?

Accepted Answer

To manually shut off the gas flow.

Answer

To regulate the gas pressure.

Answer

To prevent backflow of gas.

Answer

To release excess gas from the system.

Question 20

Which type of gas piping material is commonly used for underground natural gas distribution due to its flexibility, corrosion resistance, and durability?

Accepted Answer

Polyethylene (PE)

Answer

Copper

Answer

Galvanized steel

Answer

Polyvinyl chloride (PVC)

Question 21

Which type of piping material is suitable for high-pressure gas distribution systems due to its strength and ability to withstand high internal pressures?

Accepted Answer

Steel

Answer

Copper

Answer

PE

Answer

PVC

Question 22

Which type of gas piping fitting is used to change the direction of a gas line by 90 degrees or 45 degrees?

Accepted Answer

Elbow

Answer

Tee

Answer

Coupling

Answer

Reducer

Question 23

Which type of joint is recommended for joining PE gas piping due to its ability to create a strong, leak-proof connection?

Accepted Answer

Heat fusion

Answer

Solder

Answer

Compression

Answer

Solvent cement

Question 24

Which type of gas valve is primarily used to completely isolate a section of a gas piping system for maintenance or repairs?

Accepted Answer

Gate valve

Answer

Ball valve

Answer

Diaphragm valve

Answer

Check valve

Question 25

What is the main function of a gas meter?

Accepted Answer

To measure the volume of gas consumed by a building or appliance.

Answer

To regulate the pressure of gas flowing through the system.

Answer

To prevent backflow of gas.

Answer

To isolate the gas supply to a building.

Question 26

Which gas piping material is known for its flexibility and ease of installation?

Accepted Answer

Corrugated stainless steel tubing

Answer

Black iron pipe

Answer

Type L copper pipe

Answer

Galvanized steel pipe

Question 27

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

Accepted Answer

To prevent electrochemical reactions between dissimilar metals.

Answer

To connect pipes of different sizes.

Answer

To isolate sections of the piping for maintenance.

Answer

To change the direction of gas flow.

Question 28

Which gas piping material is typically used for underground installations?

Accepted Answer

Polyethylene pipe

Answer

Copper pipe

Answer

Cast iron pipe

Answer

PVC pipe

Question 29

What is the recommended method for installing flexible corrugated stainless steel tubing?

Accepted Answer

Securely supported with straps or hangers

Answer

Coiled and stored for future use

Answer

Exposed to direct sunlight

Answer

Buried directly in the ground

Question 30

Which type of fitting is typically used to connect gas pipes to appliances?

Accepted Answer

Flexible gas connector

Answer

Compression fitting

Answer

Dielectric union

Answer

SharkBite fitting

Question 31

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

Accepted Answer

To reduce and maintain gas pressure at a desired level

Answer

To measure gas flow

Answer

To prevent gas leaks

Answer

To control gas valve operation

Question 32

Which type of thread sealant is commonly recommended for use on gas piping connections?

Accepted Answer

Yellow Teflon tape

Answer

Plumber's putty

Answer

White Teflon paste

Answer

Silicone sealant

Question 33

What is the minimum distance required between a gas pipe and an electrical cable, according to common codes?

Accepted Answer

12 inches

Answer

24 inches

Answer

6 inches

Answer

18 inches

Question 34

What is the main purpose of a gas pipe nipple?

Accepted Answer

To connect two pipe sections of different sizes.

Answer

To prevent gas leaks.

Answer

To regulate gas flow.

Answer

To support the weight of the pipe.

Question 35

Which fitting is commonly used to join two pipe sections at a 90-degree angle in gas piping?

Accepted Answer

Elbow

Answer

Coupling

Answer

Union

Answer

Tee

Question 36

What is the primary function of a gas pipe union?

Accepted Answer

To allow for easy disassembly and reassembly of the piping system.

Answer

To seal the pipe joint.

Answer

To control gas flow.

Question 37

What is the main purpose of a gas pipe tee?

Accepted Answer

To create a branch line for gas distribution.

Answer

To regulate gas flow.

Answer

To seal the pipe joint.

Answer

To connect two pipe sections.

Question 38

When connecting different types of piping materials, which fitting is typically used?

Accepted Answer

Transition fitting

Answer

Union

Answer

Coupling

Answer

Elbow

Question 39

What is the purpose of a gas pipe cap?

Accepted Answer

To seal the end of a pipe.

Answer

To connect two pipe sections.

Answer

To regulate gas flow.

Answer

To support the weight of the pipe.

Question 40

Which of the following is a crucial safety factor in gas piping installations?

Accepted Answer

Proper venting

Answer

Aesthetics

Answer

Material cost

Answer

Pipe weight