Fuel Gas Code Flashcards
Understand regulations and applications of fuel gas systems. (100 cards)
2
Q
Which of the following is NOT required to be printed on the label of a gas appliance?
a. model number
b. serial number
c. BTU rating
d. consumer satisfaction rating
A
d. consumer satisfaction rating
3
Q
Where are gas appliances not permitted to be installed?
A
bathrooms
4
Q
Appliances installed in a pit shall have a clearance from the sides and bottoms of the pit of how many inches?
A
12 inches
5
Q
Fill in the blank:
When calculating the opening for indoor combustion air for combining spaces on the same story, the minimum free area shall be ______ square inches for every 1000 Btu/h of the total input rating of all appliances in the space.
A
1
6
Q
Fill in the blank:
Combustion air communicating directly with the outdoors with two permanent openings shall have an opening of 1 square inches for every ______ Btu/h rating of the total of all appliances served
A
4000
7
Q
What is the assumed opening percentage for a wood louver?
A
25%
8
Q
Fill in the blank:
Appliances installed in public garages shall be not less than ______ feet above the floor.
A
8
9
Q
Fill in the blank:
A level working space of not less than ______ inches wide shall be provided on the control side of appliances.
A
30
10
Q
What is the minimum height for a passageway into an attic?
A
30 inches
11
Q
What is the minimum width for the solid continuous flooring for a passageway in an attic?
A
24 inches
12
Q
Fill in the blank:
If the walls of a passageway under a floor exceeds ______ inches below adjoining grade, the walls of the passageway shall be lined with concrete.
A
12
13
Q
What is the minimum rung spacing for a permanent ladder?
A
14 inches
14
Q
Fill in the blank:
When guardrails are required, the top of the guard shall be not less than ______
inches above the adjacent surface.
A
42
15
Q
True or False:
Gas appliances should continue to operate, even if the condensate pump
fails.
A
False
16
Q
What is the minimum size wire for a bonding jumper for CSST?
A
6 AWG copper
17
Q
Fill in the blank:
Gas piping systems extend from ______ to the connection at the
appliance.
A
point of delivery
18
Q
How often should identification marking be spaced on exposed gas piping,
other than steel?
A
every 5 feet
19
Q
True or False:
The maximum demand of a gas piping system is calculated by adding
together the maximum input requirements for all appliances served.
A
True
20
Q
True or False:
Gas pipes or fittings are permitted to be reused if they are free from
foreign materials and are adequate for service.
A
True
21
Q
True or False:
Protective coating is required on metallic gas piping.
A
True
22
Q
What size of tracer wire is to be used for gas piping buried below ground?
A
18 AWG
23
Q
The test pressure to be used on a gas piping pressure test shall be not less than
______ times the maximum working pressure.
A
1 1/2
24
Q
True or False:
Before turning gas on to a gas piping system, the entire system shall
be inspected to ensure there are no open ends or valves.
A
True
25
Q
Which of the following appliances does not require a sediment trap?
a. gas fireplace
b. furnace
c. boiler
d. water heater
A
a. gas fireplace
26
# Fill in the blank:
Shut off valves for gas appliances located within the same room shall be within \_\_\_\_\_\_ feet of the appliance.
6
27
# Fill in the blank:
A tee fitting with one opening capped or plugged shall be installed \_\_\_\_\_\_ pipe diameters downstream from the MP gas regulator outlet.
10
28
# Fill in the blank:
LP gas for motor vehicle fuel dispensing facilities shall be not less than \_\_\_\_\_\_ feet from the lot line of the property.
25
29
# Fill in the blank:
Compressed natural gas motor vehicle fuel dispensing facilities shall be not less than \_\_\_\_\_\_ feet from the nearest building.
10
30
What is the maximum spacing for piping supports when installing 1 1/2" steel gas pipe?
10'
31
What is the maximum spacing for piping supports when installing 3/4" smooth wall tubing gas pipe?
6'
32
What is the pipe size given the following information:
Schedule 40 Metallic Pipe
Natural Gas
Less than 2 psi
0.3 inch w.c.
Developed Length 55 feet
Cubic Feet Per Hour 350
1 inch
33
What is the pipe size given the following information:
Schedule 40 Metallic Pipe
Natural Gas
Less than 2 psi
0.5 inch w.c.
Developed Length 35 feet
Cubic Feet Per Hour 300
1 inch
34
What is the pipe size given the following information:
Schedule 40 Metallic Pipe
Undiluted Propane
Inlet Pressure 10.0 psi
Pressure Drop 3.0 psi
Developed Length 120 feet
Thousands of BTU Per Hour 3000
3/4 inch
35
What is the tube size given the following information:
CSST
Natural Gas
Less than 2 psi
0.5 inch w.c.
Developed Length 55 feet
Cubic Feet Per Hour 110
30
36
What is the maximum cubic feet per hour given the following information:
Schedule 40 Metallic Pipe
Natural Gas
Less than 2 psi
0.5 inch w.c.
Developed Length 80 feet Pipe
Size 1 1/4"
452
37
Which of the following gas appliances are NOT required to be vented?
a. furnace
b. tankless water heater
c. range
d. fireplace
c. range
38
What is the minimum height for a cleanout on a masonry chimney flue?
6 inches
39
# True or False:
Primer of a contrasting color shall be required for gas vented appliance flues that are made from plastic pipe and fittings.
True
40
# Fill in the blank:
A chimney for a gas appliance vent shall terminate not less than \_\_\_\_\_\_ feet above the highest connected appliance or flue collar.
5
41
What is the minimum height that a gas vent must extend above the roof which has a slope of 12/12?
4.0
42
# Fill in the blank:
Through-the-wall vent terminal shall terminate not less than \_\_\_\_\_\_ feet below a non openable window or door.
no clearance required
43
What is the minimum thickness for a 8" galvanized steel vent connector?
0.023"
44
What is the minimum clearance for a single-wall metal pipe from combustible materials venting an appliance with a draft hood?
6 inches
45
What is the maximum vent connector length for a 8" diameter connector?
12'
46
# Fill in the blank:
After having used two 90-degree elbows on a gas vent connector, each additional 90-degree elbow will reduce the capacity of the vent by \_\_\_\_\_\_ percent.
10
47
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Connected directly to appliance vent
Vent Height 10'
Lateral Length 5'
Appliance BTU = 40,000
Natural Draft
3 inches
48
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Connected directly to appliance vent
Vent Height 20'
Lateral Length 5'
Appliance BTU = 140,000
Natural Draft
5 inches
49
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Single-wall metal connector
Vent Height 20'
Lateral Length 15'
Appliance BTU = 210,000
Natural Draft
6 inches
50
What is the vent diameter of a double-wall gas vent given the following information:
Two or more appliances.
Category 1
Type B double-wall connector
Vent Height 15'
Connector Rise 1'
Appliance BTU = 110,000
Natural Draft
6 inches
51
What is the vent diameter of a double-wall gas vent given the following information:
Two or more appliances.
Category 1
Type B single-wall connector
Vent Height 30'
Connector Rise 2'
Appliance BTU = 140,000
Natural Draft
6'
52
What is the assumed opening percentage for a metal louver?
75%
53
# Fill in the blank:
The maximum horizontal length of a single wall gas vent connector shall be \_\_\_\_\_\_ percent of the height of the vent.
75
54
# Fill in the blank:
The test duration for a gas piping system shall be not less than \_\_\_\_\_\_ hour(s) for each 500 cubic inches of pipe volume.
1/2
55
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Connected directly to appliance vent
Vent Height 20'
Lateral Length 5'
Appliance BTU = 1,000,000
Natural Draft
12 inches
56
# True or False:
Appliances designed for natural gas may be used with other fuel sources without conversion.
False
57
How high above the edge of a parapet or roof must a permanent ladder extend?
30 inches
58
What is the minimum height for a passageway under a floor?
30 inches
59
What is the minimum slope for a condensate drain serving a fuel-burning appliance?
1/8 unit vertical in 12 units horizontal
60
What is the minimum width for a catwalk that provides access to an appliance on a roof?
24 inches
61
What is the maximum spacing for piping supports when installing 1" steel gas pipe?
8'
62
What is the minimum width for a passageway to an appliance in an attic?
22 inches
63
What is the pipe size given the following information:
Polyethylene Plastic Pipe
Natural Gas
Less than 2 psi
0.5 inch w.c.
Developed Length 80 feet
Cubic Feet Per Hour 350
1 1/4 inch
64
What is the maximum spacing for piping supports when installing 1/2" smooth wall tubing gas pipe?
4'
65
What is the maximum spacing for piping supports when installing 1/2" steel gas pipe?
6'
66
What is the maximum spacing for piping supports when installing 1" smooth wall tubing gas pipe?
8'
67
What is the minimum height that a gas vent must extend above the roof which has a slope of 10/12?
2.5
68
What is the tube size given the following information:
CSST
Natural Gas
Less than 2 psi
0.5 inch w.c.
Developed Length 80 feet
Cubic Feet Per Hour 310
46
69
# Fill in the blank:
The sediment trap shall be installed \_\_\_\_\_\_ of the appliance shut off valve.
downstream
70
What is the pipe size given the following information:
Schedule 40 Metallic Pipe
Natural Gas 2.0 psi
Pressure Drop 1.0 psi
Developed Length 300 feet
Cubic Feet Per Hour 2500
1 1/2 inch
71
# True or False:
A direct vent water heater is permitted to be installed in a bedroom.
True
72
# True or False:
Repairs and additions to a gas piping system shall be tested with a leakdetecting
fluid.
True
73
What is the maximum length of a bonding jumper for CSST?
75'
74
# Fill in the blank:
When calculating the opening for indoor combustion air for combining spaces on different stories, the minimum free area shall be \_\_\_\_\_\_ square inches for every 1000 Btu/h of the total input rating of all appliances in the space.
2
75
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Single-wall metal connector
Vent Height 10'
Lateral Length 2'
Appliance BTU = 120,000
Natural Draft
5 inches
76
# Fill in the blank:
When using the longest length method, the sizing is determined using the longest
length from the point of delivery to \_\_\_\_\_\_.
most remote outlet
77
# Fill in the blank:
Where gas vents pass through an insulated attic, a shield shall be provided which shall terminate not less than \_\_\_\_\_\_ inches above the insulation materials.
2
78
What is the vent diameter of a double-wall gas vent given the following information:
Two or more appliances.
Category 1
Type B double-wall connector
Vent Height 10'
Connector Rise 2'
Appliance BTU = 40,000
Natural Draft
4 inches
79
# Fill in the blank:
If an existing gas system is inadequate for the addition of an appliance, the system
shall be \_\_\_\_\_\_.
enlarged
80
# Fill in the blank:
Through-the-wall vent terminal shall terminate not less than \_\_\_\_\_\_ inches above finished grade.
12
81
# True or False:
Gas piping other than CSST is not required to have electrical ground bonding.
False
82
What is the vent diameter of a double-wall gas vent given the following information:
Two or more appliances.
Category 1
Type B single-wall connector
Vent Height 20'
Connector Rise 2'
Appliance BTU = 240,000
Natural Draft
8 incjes
83
What is the maximum cubic feet per hour given the following information:
Schedule 40 Metallic Pipe
Natural Gas 2.0 psi
Pressure drop 1.0 psi
Developed Length 60 feet
Pipe Size 1"
2270
84
What is the pipe size given the following information:
Schedule 40 Metallic Pipe
Undiluted Propane
Inlet Pressure 11.0 inch w.c
Pressure Drop 0.5 inch w.c
Developed Length 80 feet
Thousands of BTU Per Hour 320
1 inch
85
What is not a requirement for combustion air ducts?
shall be covered when cold air enters the occupancy
86
# Fill in the blank:
The maximum length for a gas appliance connector in a manufactured home shall be \_\_\_\_\_\_ feet.
6
87
# Fill in the blank:
The test pressure to be used on a gas piping pressure test shall be not less than \_\_\_\_\_\_ psi.
3
88
# True or False:
Gas piping shall be supported with plastic straps, bands or hangers.
False
89
# Fill in the blank:
Appliances installed in private garages shall be not less than \_\_\_\_\_\_ feet above the floor.
6
90
What is the minimum burial depth for gas piping underground?
12 inches
91
What is the vent diameter of a double-wall gas vent given the following information:
Single Appliance.
Category 1
Connected directly to appliance vent
Vent Height 30'
Lateral Length 10'
Appliance BTU = 250,000
Natural Draft
6 inches
92
# Fill in the blank:
After having used two 90-degree elbows on a gas vent connector, each additional 45-degree elbow will reduce the capacity of the vent by \_\_\_\_\_\_ percent.
5
93
# True or False:
A 3-inch-diameter vent shall be permitted to connect to a 4-inch-diameter draft hood outlet.
False
94
# Fill in the blank:
When calculating indoor combustion air, the minimum required volume shall be \_\_\_\_\_\_ cubic feet for every 1000 Btu/h of the appliance input rating.
50
95
# Fill in the blank:
Through-the-wall vent terminal shall terminate not less than \_\_\_\_\_\_ feet horizontally from a mechanical air supply inlet.
10
96
# Fill in the blank:
Combustion air communicating with the outdoors through horizontal ducts with two permanent openings shall have an opening of 1 square inches for every \_\_\_\_\_\_ Btu/h rating of the total of all appliances served.
2000
97
# True or False:
Gas piping systems on buildings with two or more shall be permitted to interconnect on the outlet side of the meter.
False
98
What is the maximum vent connector length for a 4" diameter connector?
6'
99
Which of the following gas appliances are NOT required to be vented?
a. Type 1 clothes dryer
b. tank water heater
c. boiler
d. fireplace
a. Type 1 clothes dryer
100
# Fill in the blank:
A chimney for a gas appliance vent shall extend not less than \_\_\_\_\_\_ feet higher than any portion of the building within 10 feet horizontal distance.
2
101
# True or False:
PVC pipe shall be permitted for use on gas pipe systems.
False
