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Gas Theory > Intro > Flashcards

Intro Flashcards

1
Q

Which section of theCAN/CSA -B149.1-10 Code does the abbreviations sections follow?

A

TheDefinitionssection of theCAN/CSA -B149.1-15

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2
Q

Piping or tubing may be supported by any larger pipe in the system

A

False

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3
Q

Threaded Schedule 40 steel piping may be used for pressures not exceeding ____?

A

125psi

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4
Q

Underground piping systems shall be joined by means of

A

Welding and Compression

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5
Q

The volume of gas required for each appliance shall be determined from the appliance rating plate and/or the manufacturers specifications

A

True

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6
Q

Finish piping and appliance connections shall be checked under test pressure with either a soap solution or a leak detection device

A

False

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7
Q

An addition to an existing gas line is not subject to Table 6.3 when

A

Its less than 20 feet in length or its welded

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8
Q

Every hose and hose fitting shall have a minimum pressure rating of ___ psi

A

350

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9
Q

Natural Rubber may be used as a gasket material

A

False

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10
Q

A defective section of gas piping or tubing may be repaired by a qualified gasfitter

A

False

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11
Q

A hose may be used o connect a non vented appliance

A

Yes

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12
Q

When a piping system is purged outdoors the purge point must no terminate closer than 3 feet from a building or air intake

A

false

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13
Q

Underground piping or tubing shall not pass below

A

a foundation wall or under a building

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14
Q

Piping or tubing installed in aa commercial building shall be identified by ____at_____ intervals

A

Painting the entire gas line yellow
Yellow banding at 20ft intervals
Labelled or marked gas or propane at 20 foot intervals

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15
Q

A corrugated metal connector shall not exceed 2ft in length when connecting to a suspended appliance or a decorative appliance

A

true

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16
Q

A sleeve must be provided when piping or tubing passes through pavement in order to _____

A

Permit the free movement of the piping

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17
Q

When a shut off valve controls several systems it shall

A

Be readily acceptable
Have a handle installed
be protected from damage
be clearly marked

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18
Q

Plastic piping shall only be used underground service

A

true

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19
Q

Piping or tubing shall never be encased in ducts

A

false

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20
Q

Nesting of bushing is permitted on low pressure gas piping

A

False

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21
Q

The maximum range of a test gauge shall exceed the test pressure by at least 15% but not more than 30%

A

False

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22
Q

A girder beam or joist may be cut for in for installation piping

A

True

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23
Q

A street elbow or street tee may be used on low pressure gas piping

A

false

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24
Q

tubing run inside hollow walls within 1.75 “ of the surface shall be protected by 16 gauge plate or sleeves

A

true

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25
Q

A corrugated metal connector may be used to connect a room heater

A

true

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26
Q

What is the maximum length of a metal connector for a range is

A

6 feet

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27
Q

Type L copper tubing may be used underground

A

true

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28
Q

When an existing piping or tubing system is of insufficient size for additional appliances, the extension shall run a separate line for the new appliance sized for the additional load to with 30 inches of the meter

A

false

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29
Q

A branch line must be the same diameter as the supply piping when

A

it supplies an unknown future supply connection

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30
Q

For a portable appliance a hose shall not exceed 75 ft in length

A

false

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31
Q

A 2” NPS welded gas line shall be tested to pressure of 50 PSI or 1.5 times the maximum operating pressure for 3 hours

A

True

32
Q

A gas line operating a 10” W.C shall be designed to prevent the loss of no more than .5 “w.c

A

false

33
Q

A tracer wire must accompanied plastic pipe when

A

It must always be used

34
Q

A purge line shall be no larger than 3/4 “ NPS for purging a line up to 4” NPS

A

False

35
Q

Gas piping tubing and fittings may not be reused unless its a good as new condition and must have been used on gas before

A

true

36
Q

A 12 inch NPS horizontal gas line must be supported every

A

8 meters

37
Q

A vented appliance may be connected to the gas supply be a quick disconnect device

A

false

38
Q

Piping or tubing may be used in lieu of wiring for an electric circuit when

A

in incorporates a flame detection device installed as part of the unit

39
Q

Underground piping may be covered 24 hours before being tested

A

false

40
Q

Threaded pipe les than 1/2” diameter shall be a minimum wall thickness of schedule 160 for natural gas

A

false

41
Q

A piping outlet that is connected to an appliance shall terminated by means of

A

a plugged valve
a cap
a plug

42
Q

Underground tubing systems shall be joined by means of brazing soldering compression and flaring

A

false

43
Q

Piping or tubing may be installed in a false ceiling space used as return air plenum

A

true

44
Q

piping or tubing shall be sleeved coated or double wrapped when passing through an outside masonry wall

A

true

45
Q

A hose shall not be subjected to temperatures greater than

A

125F

46
Q

A job fabricated weld fitting may be used in place of a manufactured weld fitting when the header is t least 3 1/2” NPS and the branch connection is larger than 3/4” but no larger than 50% of the header size

A

false

47
Q

A dirt pocket shall be installed on the final drop to every appliance

A

false

48
Q

A residential tubing system shall be identified at 6 foot intervals

A

true

49
Q

Pressure and duration of tests shall be in accordance with table

A

6.3

50
Q

The use of the left hand and right hand threaded coupling is not permitted on gas piping system

A

true

51
Q

Piping or tubing shall be painted or coated when

A

they are installed outdoors

or they are installed in corrosive interiors indoors

52
Q

Piping and tubing shall be located at least 3 feet below a commercial driveway or parking lot

A

false

53
Q

For a permanent installation a hose shall not exceed 10 feet in length

A

true

54
Q

After and appliance is connected before turning on the gas a check shall be made to ensure that al gas lines are installed as per code

A

false

55
Q

the unthreaded portion of a piping outlet shall extend 25mm 1” through a ceiling or wall 50 mm through floor

A

true

56
Q

Piping or tubing extending from one building to another shall have a shut off vavle located on the gas line just outside the building supplying the gas

A

false

57
Q

piping used in a concealed location shall be a minimum of 3/8” NPS

A

false

58
Q

at any point where piping or tubing through an outside wall below ground level a /an ust be provided

A

water tight seal

59
Q

All factory wrapped or coated piping shall be tested to a minimum of 100psig

A

true

60
Q

A construction heater shall be connected by a hose not exceeding __ but no less than __ in length

A

75 feet no less then 15 feet

61
Q

A bushing may be used to reduce one pipe size when made of

A

steel

62
Q

A drip pocket shall be provided where ____ minimum size

A

condensation may collect 3”

63
Q

A test gauge face diameter min size

A

3”

64
Q

Where should a manual appliance shut off valve be installed

A

in he drop or riser of commercial or industrial appliance
in the drop or riser of res. appl.
within 2ft of horizontal piping to a res. appl.
within 50ft of a single residential appliance

65
Q

Where a commercial appliance may be affected by vibration a ___ at be used

A

a hose connection at be used

66
Q

a gas line 4” NPS or larger that has been tested with air must be purged with an ___ and then purged with ___

A

an inert gas and then purged with gas

67
Q

tubing laid on a rooftop shall be supported

A

continuously with treated wood and planks

68
Q

finsh piping and appliance connections shall be checked under ____ pressure

A

normal operating pressure

69
Q

An addition an existing gas line is not subject to table 6.2 when ___

A

its not less than 20’ long and is a welded tie in

70
Q

A n4” NPS or larger gas line has to be purged with an inert gas because it is chemically no reactive whereas an air/gas mixture could be volatile

A

true

71
Q

When the testing and purging of a gas line is complete an gas is introduced into the line what is the first check that the gas fitter should perform

A

watch the gas meter test dial for 10 mins to ensure there are no leaks

72
Q

the Metric prefix deci stands for

A

one tenth

73
Q

the abbreviation MPa indicates

A

a unit of Pressure

74
Q

the term volatile is used to reference

A

how easily a gas mixes with air

75
Q

2 gallons of propane liquid would weigh

A

10 pounds

Gas Theory (4 decks)

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