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Gasfitting Redseal > Gasfitting Redseal > Flashcards

Gasfitting Redseal Flashcards

1
Q

How far can appliance be from gascock shutting it off?

A

50ft, as long as its acessible and properly tagged

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2
Q

When can you use one shutoff to shutoff multiple appliances

A

The appliances need to be direct vent room heaters in residential

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3
Q

Hoses for construction heaters must be how long?

A

15-75ft

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4
Q

Minimum clearance required from grade to vent below a veranda?

A

1ft

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5
Q

Minimum working pressure for hoses and fittings?

A

350psig

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6
Q

Minimum distanced between a direct vent outlet and combustion air hood?

A

3ft

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7
Q

Maximum domestic pressure of propane gas in a house?

A

2psig

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8
Q

Max exhaust hose length on dryer

A

6ft

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9
Q

What must be installed with plastic piping?

A

Tracer wire

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10
Q

Gas supply to generator needs to be?

A

Piped seperately from gas supply to building

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11
Q

Whats the difference between bh and b vent

A

Corrosion resistance

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12
Q

Transformers are sized by what?

A

Va rating

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13
Q

Max distance between gas labels in resi?

What about commercial?

A

6ft

20ft

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14
Q

Minimum appliance combustible clearance from a source of ignition in a storage garage?

A

18”

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15
Q

What prodcedure would be used to measure manifold pressure?

A

Remove outlet screw, screw in adapter, connect manometer, turn on gas

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16
Q

How do you clean a pipe before electro fusion?

A

70% isopropyl alcohol

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17
Q

Spark gap on ipi pilot assembly?

A

1/8”

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18
Q

Va limit on class 2 transformer

A

100 va

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19
Q

How many exposed threads on a proper connection?

A

2-3

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20
Q

Clearance between a regulator and an ac unit

A

10ft

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21
Q

What would happen if your vent on gas regulator is blocked?

A

Pressure would increase

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22
Q

Minimum biry depth of gas pipe?

A

15”

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23
Q

What method is used to seal polypropylene?

A

Gasket

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24
Q

What appliance cannot be used as a double acting barometric damper

A

Incinerator

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25
Q

Diameter vent pipe for a regulator with a 3/4 vent outlet and a developed length of 92ft?

A

1”

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26
Q

How what you prepare hdpe pipe before electrofusion?

A

An approved rasp-type tool

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27
Q

Inspirated

A

Uses fuel to entrain air

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28
Q

What is aspirated?

A

Air to entrain fuel

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29
Q

Max c.o allowed in dwelling?

A

5ppm

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30
Q

How would a partially blocked vent affect the operation of a gas regulator?

A

Slow or sluggish operation

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31
Q

Max support spacing for 1” gas line?

A

8ft

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32
Q

Where does the combustion fan recieve an output signal from?

A

ECM

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33
Q

Propane tanks are inspected by whom?

A

Provincial boiler pressure vessels branch

34
Q

Mass of one cubic foot of propane liquid?

35
Q

Where should a lwco be installed?

A

In supply or return above the boiler

36
Q

Clearance to combustibles for B vent

37
Q

What is the set point of a low temp bouler with a cut-in temp of 20 degrees Fahrenheit

A

180 degrees Fahrenheit

38
Q

Hanger spacing 1/2 black

39
Q

Hanger spacing for 1 1/4- 2 1/2” black pipe?

40
Q

What colour wire would 24v power be?

41
Q

What schedule pipe is required for liquid propane?

42
Q

schedule 40 threaded black iron max pressure

43
Q

Smallest concealed pipe

44
Q

Minimum guage size

45
Q

Maximum reading on a test guage for a 50psig pressure test

46
Q

Gaskets used on gas must be?

A

Synthetic rubber or cork

No natural rubber

47
Q

When can pipe be reused?

A

Inspected, cleaned, and tested

48
Q

A roof over 13ft needs a?

A

Needs a permanent access

49
Q

What does a roof over 26ft need?

A

A stairwell

50
Q

How is teflon applied?

A

Clockwise direction with 50% overlap leaving 2 starter threads

51
Q

Max co in vent

52
Q

Oxygen percentage range in vent

53
Q

C02 percentage in vent

A

7-10%

12% being optimal

54
Q

What is fhe sympton of a lifting pilot burner flame?

A

Too much primary air

55
Q

What fitting is prohibited?

A

Continuous thread?

56
Q

How can a gasfitter determine if a regulator is not a positive shutoff type?

A

Downstream pressure increase

57
Q

What light would you use to search for a gas leak

A

Class 1 group 11a

58
Q

Whats the minimum service clearance

59
Q

Minimum acess opening for an appliance

60
Q

A clear unobstructed passage leading to an appliance shall have what minimum dimensions?

61
Q

Appliance in storage garage minimum distance from floor to burner?

62
Q

Appliance in repair garage minimum diatance from floor to burner?

63
Q

Can you repair a heat exchanger in a residential furnance?

A

Temporarily, if approved by authority having jurisdiction

64
Q

Maximum pressure allowed in a 4 plex?

65
Q

Max pressure in a mechanical room serving a hotel, motel, care or detention centre?

66
Q

Maximum gas pressure allowed in any building?

67
Q

Maximum pressure downstream of the 1st stage regulator on a propane system is?

68
Q

Liquid propane can be piped into the mechanical room of an idustrial building, true or false?

69
Q

Can you have liquid propane in a residence provided its not more then 3ft into the building upstream of the 2nd stage regulator? True or false

70
Q

Minimum clearance from a regulator to a commercial clothes dryer exhaust duct is?

71
Q

Pressure regulators shall not be?

72
Q

Regulators over 0.5psi shall be?

A

Positive shutoff type

73
Q

What materials are approved for gas piping and tubing?

A

Steel, copper, plastic

74
Q

What certification standards are required for steel pipe?

A

Astm a53/a53m or ASTM A106

75
Q

What types of fittings arw approved for use on steel pipe

A

Malleable iron or steel

76
Q

Flate nuts shall be what?

77
Q

Appliance to edge of roof distance?

78
Q

What materials are approved for use as gas tubing?

A

Seamless copper
Seamless steel
Csst (corrugated)

79
Q

Every hose or hose fitting needa to have a minimum pressure rating of what?

80
Q

Plastic piping may only be installed where?

A

Outside and underground

81
Q

Max pressure drop of a system operating between 7-14” wc?

82
Q

Snallest piping diameter that may be concealed?

Gasfitting Redseal (1 decks)

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