Gas Piping Installation Methods: A Comprehensive Guide for Vocational Students

Question 1

Which of the following is NOT a standard type of gas piping installation method?

Accepted Answer

Exposed

Answer

Underground

Answer

Above-ground

Answer

Concealed

Question 2

Which of the following materials is prohibited for use in gas piping installations?

Accepted Answer

PVC

Answer

Copper

Answer

Galvanized steel

Answer

Polyethylene

Question 3

When installing gas piping in concealed spaces, what is the primary purpose of using a sealant?

Accepted Answer

Preventing gas leaks

Answer

Enhancing insulation

Answer

Protecting against corrosion

Answer

Providing structural support

Question 4

In commercial buildings, which type of gas piping is predominantly used?

Accepted Answer

Black iron

Answer

Galvanized steel

Answer

Copper

Answer

Polyethylene

Question 5

Which type of pipe is typically used for concealed gas piping within walls and ceilings?

Accepted Answer

Copper

Answer

PVC

Answer

Flexible metal

Question 6

What is the primary purpose of using dielectric fittings in gas piping systems?

Accepted Answer

To prevent galvanic corrosion

Answer

To increase flexibility

Answer

To seal threaded connections

Question 7

When installing gas piping, what is the primary purpose of using a pipe wrench?

Accepted Answer

To tighten and loosen pipe fittings

Answer

To cut and shape pipe

Answer

To measure pipe length

Question 8

When installing gas piping underground, the minimum depth of cover required in the United States is:

Accepted Answer

18 inches

Answer

12 inches

Answer

24 inches

Answer

30 inches

Question 9

What is the purpose of using a pressure test gauge when installing gas piping?

Accepted Answer

To check for leaks

Answer

To measure gas flow rate

Answer

To determine pipe diameter

Answer

To relieve pressure in the system

Question 10

Which of the following connections is used for gas piping made of copper tubing in the United States?

Accepted Answer

Sweat joint

Answer

Flared joint

Answer

Compression joint

Answer

Threaded joint

Question 11

What is the maximum allowable bending radius for a 1/2-inch diameter gas pipe in the United States?

Accepted Answer

7 inches

Answer

3 inches

Answer

5 inches

Answer

9 inches

Question 12

Which of the following tools is primarily used to cut gas piping in the United States?

Accepted Answer

Pipe cutter

Answer

Hacksaw

Answer

Reciprocating saw

Answer

Snips

Question 13

Which type of gas piping inspection involves using a camera to examine the interior of the pipe?

Accepted Answer

Video inspection

Answer

Visual inspection

Answer

Pressure test

Answer

Leak detection

Question 14

When installing concealed gas piping, which action is essential for maintaining safety?

Accepted Answer

Sealing all openings around pipes passing through walls or floors

Answer

Running piping directly through combustible materials

Answer

Using flexible connectors to resolve misalignment issues

Answer

Installing gas piping in areas lacking proper ventilation

Question 15

Which of the following methods involves burying gas pipes underground?

Accepted Answer

Underground piping

Answer

Exposed piping

Answer

Above-ground piping

Answer

Concealed piping

Question 16

During gas piping installation, what is the primary purpose of a pipe bender?

Accepted Answer

Shaping the pipe to navigate around obstacles

Answer

Measuring and cutting pipe lengths

Answer

Supporting the pipe

Answer

Joining pipes

Question 17

To change the direction of a gas pipe, which type of fitting is used?

Accepted Answer

Elbow

Answer

Tee

Answer

Union

Answer

Bushing

Question 18

Which method is recommended for inspecting a gas piping system for leaks?

Accepted Answer

Using a soap and water solution

Answer

Using a flame detector

Answer

Using a smoke detector

Answer

Using a pressure gauge

Question 19

Which type of underground gas piping installation method involves placing the pipe in a trench and backfilling it?

Accepted Answer

Direct burial

Answer

Tunneling

Answer

Boring

Answer

Jacking

Question 20

What type of concealed gas piping installation method involves installing the piping within walls, ceilings, or floors?

Accepted Answer

Recessed

Answer

Semi-concealed

Answer

Exposed

Answer

Surface mounted

Question 21

Which type of gas pipe is typically used for concealed installations?

Accepted Answer

Copper

Answer

Steel

Answer

PVC

Answer

Polyethylene

Question 22

What is the correct procedure for troubleshooting a gas leak?

Accepted Answer

Isolate the leak, ventilate the area, and call a qualified professional.

Answer

Ignite the leak to burn off the gas

Answer

Seal the leak with duct tape

Question 23

Which type of gas valve is used to control the flow of gas to a specific appliance?

Accepted Answer

Manual shut-off valve

Answer

Pressure regulator

Answer

Safety shut-off valve

Answer

Backflow preventer