CO140 - 2021 International Fuel Gas Code Chap 4 - Final Exam

Front

What is the capacity in cubic feet of gas per hour for a 3/4" diameter schedule 40 metallic pipe 40 feet in length?

Back

129

Front

Reference Table 403.8.2, What is the approximate number of threads to be cut on a 3/4" iron pipe with a 3/4" approximate length of threaded portion?

Back

10

Front

Underground piping systems shall be installed a minimum depth of ___________ below grade.

Back

12 inches

Front

When testing a gas system having a volume less than 10 cubic feet or a system in a single family dwelling, the test duration shall be not less than _____________.

Back

10 minutes

Front

Piping for other than dry gas conditions shall be sloped not less than _______ in 15 feet to prevent traps.

Back

1/4 inch

Front

Reference Table 413.10.2.3, What is the minimum separation in feet for atmospheric venting of CNG to property lot lines?

Back

15 feet

Front

What is the spacing of supports for a 3/4" nominal size of steel pipe?

Back

8 feet

Front

What is the capacity in thousands of Btu per hour for a 3/4" schedule 40 metallic pipe with a length of 30 feet?

Back

3,840

Front

What is the minimum size for a yellow insulated copper tracer wire that is installed adjacent to underground nonmetallic piping?

Back

18 AWG

Front

A union fitting shall be located within _________ for appliances connected by rigid metallic pipe.

Back

6 feet