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UPC Journeyman Plumber > Fuel Gas Code > Flashcards

Fuel Gas Code Flashcards

Understand regulations and applications of fuel gas systems. (50 cards)

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1
Q

Which is not considered a point of delivery for natural gas systems?

a. the vertical gas riser coming out of the ground
b. the outlet of the service meter assembly
c. the outlet of the service regulator
d. the service shut off valve where no meter is present

A

a. the vertical gas riser coming out of the ground

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2
Q

True or False:

Minor installation of additional gas piping to piping already connected to a gas meter does not need to be inspected.

A

True

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3
Q

True or False:

If the AHJ disconnects gas piping which is not up to code standards, no notification is required.

A

False

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4
Q

Which of the following information is useful but not required on a gas piping sketch or plan?

a. number of fittings
b. location of piping
c. size of branches
d. load demands

A

a. number of fittings

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5
Q

Fill in the blank:

If the capacity of a gas system is inadequate for additional appliances, the existing system shall be ______ as required.

A

enlarged

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6
Q

Fill in the blanks:

Gas piping systems shall be sized to provide a supply of gas to meet the ______ demand and at least supply the ______ supply pressure to each appliance.

A

maximum, minimum

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7
Q

What is the approximate gas input for a typical warm air furnace in a single-family dwelling?

A

100,000 BTU

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8
Q

What is the approximate gas input for a 50-gallon tank water heater?

A

50,000 BTU

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9
Q

True or False:

Pipe, fittings, valves or other materials once used for a gas piping system shall never be used again.

A

False

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10
Q

Fill in the blank:

Threaded metallic pipe used for gas piping systems that is 3/4” in size shall have approximately ______ threads cut into the pipe.

A

10

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11
Q

Fill in the blank:

Metallic threaded fittings in sizes larger than ______ inches shall not be used for gas piping systems.

A

4

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12
Q

Fill in the blank:

Gas pressure regulators shall be ______ for servicing.

A

accessible

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13
Q

Fill in the blank:

In normal conditions, underground gas piping systems shall be installed with a minimum of ______ inches of cover.

A

12

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14
Q

True or False:

If an underground gas pipe cannot be installed with at least 12 inches of cover, the pipe shall be placed in a conduit.

A

True

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15
Q

What is the maximum spacing between supports for 1/2” steel gas pipe?

A

6 feet

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16
Q

What is the maximum horizontal spacing between supports for 1 1/4” steel gas pipe?

A

10 feet

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17
Q

True or False:

Gas piping supports shall be installed so as to restrict the free expansion and contraction of the piping between anchors.

A

False

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18
Q

Where gas piping is to be concealed, which of the following gas piping connections is not approved?

a. elbows
b. tees
c. couplings
d. unions

A

d. unions

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19
Q

True or False:

Concealed gas piping shall be permitted to be located in hollow partition walls.

A

True

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20
Q

Fill in the blank:

The unthreaded portion of gas piping outlets shall extend not less than ______ through finished ceilings or indoor walls.

A

1” inch

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21
Q

True or False:

For gas piping other than CSST, the piping shall be considered to be electrically bonded when connected to an appliance that is connected to a grounding conductor of the circuit supplying the appliance.

22
Q

True or False:

Gas piping shall be permitted for use as a grounding conductor.

23
Q

What is the maximum length for a non-metallic gas hose connector being used indoors to connect a laboratory appliance?

24
Q

Fill in the blank:

A shut off valve to a gas appliance shall be located within ______ feet of the appliance it serves.

25
# True or False: A union or flanged connection shall be provided between the gas appliance shut off valve and the connection to the appliance.
True
26
What is the minimum length for a nipple between the tee and the cap on a sediment trap?
3”
27
# True or False: Pipe joints shall be left exposed for examination during the test of a gas pipe system.
True
28
# Fill in the blank: The air pressure test of a gas piping system shall be held for at least \_\_\_\_\_\_ minutes without a drop in pressure.
15
29
If a gas pipe system is losing pressure on a test, which of the following is not an approved method for discovering the location of the leakage? a. use a gas detector b. use non corrosive leak detection fluid c. use an open flame d. none of these
c. use an open flame
30
# Fill in the blank: The size of the supply piping outlet for a mobile home shall be not less than \_\_\_\_\_\_ in diameter.
3/4"
31
# Fill in the blank: When sizing gas piping using the longest length method, if the exact length of the system is not shown on the sizing table, use \_\_\_\_\_\_.
the next longer distance listed
32
# Fill in the blank: Regulations of Chapter 12 govern the installation of gas pipes for undiluted propane gas systems up to \_\_\_\_\_\_ psi.
10
33
# True or False: Where necessary, underground gas piping excavations can be covered or concealed prior to the inspection and approval of the piping.
False
34
# Fill in the blank: The location of the point of delivery for a gas pipe system shall be acceptable to \_\_\_\_\_\_.
the servicing gas supplier
35
What is the approximate gas input for a typical boiler in a single-family dwelling?
120,000 BTU
36
# True or False: Metal pipe and fittings used for gas piping systems are required to have tapered threads.
True
37
# Fill in the blank: Threaded metallic pipe used for gas piping systems that is 3" in size shall have approximately \_\_\_\_\_\_ threads cut into the pipe.
12
38
# True or False: Gas meters shall be supported or connected to rigid piping so as not to exert strain on the meter.
True
39
Which of the following is not a prohibited location for the installation of gas piping? a. accessible ceiling space b. clothes chute c. elevator shaft d. air duct
a. accessible ceiling space
40
What is the maximum horizontal spacing between supports for 1" steel gas pipe?
8 feet
41
# True or False: Emergency shutoff valves for gas piping on the exterior of a building shall be plainly marked as such.
True
42
What is the maximum length for a bonding jumper for CSST gas piping?
75 feet
43
# True or False: When using a listed connector to make a connection to a gas appliance, more than only one connector shall be used per appliance.
True
44
# Fill in the blank: The air test of a gas piping system shall stand a pressure of not less than \_\_\_\_\_\_ psi.
10
45
What is the main gas pipe size for a pipe system having the following conditions? Schedule 40 Metallic Pipe Natural Gas Inlet Pressure Less Than 2 psi 0.5 in. W.C. Specific Gravity 0.60 Longest Length: 130 feet Cubic Feet per Hour: 520
11
46
# Fill in the blank: Threaded metallic pipe used for gas piping systems that is 2" in size shall have approximately \_\_\_\_\_\_ threads cut into the pipe.
2”
47
What is the main gas pipe size for a pipe system having the following conditions? Semi-Rigid Copper Tubing Type K Natural Gas Inlet Pressure Less Than 2 psi Pressure Drop 0.5 in. w.c. Specific Gravity 0.60 Longest Length: 50 feet Cubic Feet per Hour: 150
1”
48
What is the main gas pipe size for a pipe system having the following conditions? Schedule 40 Metallic Pipe Natural Gas Inlet Pressure 2 psi Specific Gravity 0.60 Longest Length: 120 feet Cubic Feet per Hour: 1160
1
49
What is the main gas pipe size for a pipe system having the following conditions? Polyethylene Plastic Pipe Natural Gas Inlet Pressure Less Than 2 psi Pressure Drop 0.5 in. w.c. Specific Gravity 0.60 Longest Length: 75 feet Cubic Feet per Hour: 125
3⁄4”
50
What is the gas pipe size for a pipe system having the following conditions? Schedule 40 Metallic Pipe Undiluted Propane Inlet Pressure 11 in. w.c Pressure Drop 0.5 in. w.c. Specific Gravity 1.50 Longest Length: 150 feet Thousands of BTU per Hour: 440
1”

UPC Journeyman Plumber (15 decks)

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