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IPC Journeyman Plumber > Fuel Gas Code > Flashcards

Fuel Gas Code Flashcards

Understand regulations and applications of fuel gas systems.

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

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3
Q

Where are gas appliances not permitted to be installed?

A

bathrooms

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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

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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

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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

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7
Q

What is the assumed opening percentage for a wood louver?

A

25%

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8
Q

Fill in the blank:

Appliances installed in public garages shall be not less than ______ feet above the floor.

A

8

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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

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10
Q

What is the minimum height for a passageway into an attic?

A

30 inches

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11
Q

What is the minimum width for the solid continuous flooring for a passageway in an attic?

A

24 inches

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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

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13
Q

What is the minimum rung spacing for a permanent ladder?

A

14 inches

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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

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15
Q

True or False:

Gas appliances should continue to operate, even if the condensate pump
fails.

A

False

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16
Q

What is the minimum size wire for a bonding jumper for CSST?

A

6 AWG copper

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17
Q

Fill in the blank:

Gas piping systems extend from ______ to the connection at the
appliance.

A

point of delivery

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18
Q

How often should identification marking be spaced on exposed gas piping,
other than steel?

A

every 5 feet

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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

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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

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21
Q

True or False:

Protective coating is required on metallic gas piping.

A

True

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22
Q

What size of tracer wire is to be used for gas piping buried below ground?

A

18 AWG

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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

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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

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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

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26
Q

Fill in the blank:

Shut off valves for gas appliances located within the same room shall be within ______ feet of the appliance.

A

6

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27
Q

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.

A

10

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28
Q

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.

A

25

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29
Q

Fill in the blank:

Compressed natural gas motor vehicle fuel dispensing facilities shall be not less than ______ feet from the nearest building.

A

10

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30
Q

What is the maximum spacing for piping supports when installing 1 1/2” steel gas pipe?

A

10’

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31
Q

What is the maximum spacing for piping supports when installing 3/4” smooth wall tubing gas pipe?

A

6’

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32
Q

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

A

1 inch

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33
Q

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

A

1 inch

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34
Q

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

A

3/4 inch

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35
Q

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

A

30

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36
Q

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”

A

452

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37
Q

Which of the following gas appliances are NOT required to be vented?

a. furnace
b. tankless water heater
c. range
d. fireplace

A

c. range

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38
Q

What is the minimum height for a cleanout on a masonry chimney flue?

A

6 inches

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39
Q

True or False:

Primer of a contrasting color shall be required for gas vented appliance flues that are made from plastic pipe and fittings.

A

True

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40
Q

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.

A

5

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41
Q

What is the minimum height that a gas vent must extend above the roof which has a slope of 12/12?

A

4.0

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42
Q

Fill in the blank:

Through-the-wall vent terminal shall terminate not less than ______ feet below a non openable window or door.

A

no clearance required

43
Q

What is the minimum thickness for a 8” galvanized steel vent connector?

44
Q

What is the minimum clearance for a single-wall metal pipe from combustible materials venting an appliance with a draft hood?

45
Q

What is the maximum vent connector length for a 8” diameter connector?

46
Q

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.

47
Q

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

48
Q

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

49
Q

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

50
Q

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

51
Q

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

52
Q

What is the assumed opening percentage for a metal louver?

53
Q

Fill in the blank:

The maximum horizontal length of a single wall gas vent connector shall be ______ percent of the height of the vent.

54
Q

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.

55
Q

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

56
Q

True or False:

Appliances designed for natural gas may be used with other fuel sources without conversion.

57
Q

How high above the edge of a parapet or roof must a permanent ladder extend?

58
Q

What is the minimum height for a passageway under a floor?

59
Q

What is the minimum slope for a condensate drain serving a fuel-burning appliance?

A

1/8 unit vertical in 12 units horizontal

60
Q

What is the minimum width for a catwalk that provides access to an appliance on a roof?

61
Q

What is the maximum spacing for piping supports when installing 1” steel gas pipe?

62
Q

What is the minimum width for a passageway to an appliance in an attic?

63
Q

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

A

1 1/4 inch

64
Q

What is the maximum spacing for piping supports when installing 1/2” smooth wall tubing gas pipe?

65
Q

What is the maximum spacing for piping supports when installing 1/2” steel gas pipe?

66
Q

What is the maximum spacing for piping supports when installing 1” smooth wall tubing gas pipe?

67
Q

What is the minimum height that a gas vent must extend above the roof which has a slope of 10/12?

68
Q

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

69
Q

Fill in the blank:

The sediment trap shall be installed ______ of the appliance shut off valve.

A

downstream

70
Q

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

A

1 1/2 inch

71
Q

True or False:

A direct vent water heater is permitted to be installed in a bedroom.

72
Q

True or False:

Repairs and additions to a gas piping system shall be tested with a leakdetecting
fluid.

73
Q

What is the maximum length of a bonding jumper for CSST?

74
Q

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.

75
Q

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

76
Q

Fill in the blank:

When using the longest length method, the sizing is determined using the longest
length from the point of delivery to ______.

A

most remote outlet

77
Q

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.

78
Q

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

79
Q

Fill in the blank:

If an existing gas system is inadequate for the addition of an appliance, the system
shall be ______.

80
Q

Fill in the blank:

Through-the-wall vent terminal shall terminate not less than ______ inches above finished grade.

81
Q

True or False:

Gas piping other than CSST is not required to have electrical ground bonding.

82
Q

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

83
Q

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”

84
Q

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

85
Q

What is not a requirement for combustion air ducts?

A

shall be covered when cold air enters the occupancy

86
Q

Fill in the blank:

The maximum length for a gas appliance connector in a manufactured home shall be ______ feet.

87
Q

Fill in the blank:

The test pressure to be used on a gas piping pressure test shall be not less than ______ psi.

88
Q

True or False:

Gas piping shall be supported with plastic straps, bands or hangers.

89
Q

Fill in the blank:

Appliances installed in private garages shall be not less than ______ feet above the floor.

90
Q

What is the minimum burial depth for gas piping underground?

91
Q

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

92
Q

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.

93
Q

True or False:

A 3-inch-diameter vent shall be permitted to connect to a 4-inch-diameter draft hood outlet.

94
Q

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.

95
Q

Fill in the blank:

Through-the-wall vent terminal shall terminate not less than ______ feet horizontally from a mechanical air supply inlet.

96
Q

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.

97
Q

True or False:

Gas piping systems on buildings with two or more shall be permitted to interconnect on the outlet side of the meter.

98
Q

What is the maximum vent connector length for a 4” diameter connector?

99
Q

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

a. Type 1 clothes dryer

100
Q

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.

101
Q

True or False:

PVC pipe shall be permitted for use on gas pipe systems.

IPC Journeyman Plumber (11 decks)

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