ICC Natural Gas Systems and Safety

Question 1

Under 49 CFR Part 192, what is the minimum cover depth required for natural gas distribution pipelines installed in normal soil conditions?

Accepted Answer

24 inches

Answer

12 inches

Answer

18 inches

Answer

30 inches

Question 2

Which Illinois regulatory body has primary jurisdiction over the safety of natural gas pipelines operated by public utilities in the state?

Accepted Answer

Illinois Commerce Commission

Answer

Illinois Environmental Protection Agency

Answer

Illinois Department of Natural Resources

Answer

Illinois State Fire Marshal

Question 3

Before placing a new natural gas service line in service, what strength test must be performed according to 49 CFR Part 192?

Accepted Answer

Pneumatic test at 1.5 times maximum allowable operating pressure (MAOP)

Answer

Hydrostatic test at 1.1 times operating pressure

Answer

Leak test at operating pressure for 24 hours

Answer

Visual inspection at standard operating pressure

Question 4

Which pipe material is prohibited from use in new natural gas distribution main or service line installations?

Accepted Answer

Cast iron pipe

Answer

Polyethylene (PE) pipe

Answer

Steel pipe

Answer

Copper tubing for service lines

Question 5

In Illinois, what must a contractor do before beginning any excavation that could affect underground natural gas facilities?

Accepted Answer

Call JULIE (811) at least 48 hours before digging

Answer

Obtain a permit from the ICC

Answer

Contact the property owner only

Answer

Install warning signs and proceed carefully

Question 6

What is the primary purpose of cathodic protection installed on buried steel natural gas pipelines?

Accepted Answer

To prevent corrosion caused by soil moisture and stray electrical currents

Answer

To regulate gas pressure within the distribution system

Answer

To monitor gas flow rates at remote locations

Answer

To automatically detect and report gas leaks

Question 7

Under ICC-adopted pipeline safety regulations, how frequently must operators conduct leak surveys on natural gas distribution lines in business districts?

Accepted Answer

Twice per year

Answer

Annually

Answer

Every two years

Answer

Every five years