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Plumbing/Gasfitting Period 2 (CND) > Pipefitting and Welding Period 2 (CND) > Flashcards

Pipefitting and Welding Period 2 (CND) Flashcards

1
Q

Who is responsible for the personal safety of everyone in the shop?

A

The individual worker

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2
Q

Exposure to infrared light without proper eye protection can cause?

A

Retina damage

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3
Q

Temporary blindness is caused by the eyes being exposed to high levels?

A

Visible light

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4
Q

Which type of material offers the best protection against sparks and molten slag?

A

Leather

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5
Q

What type of gloves are recommended for oxyfuel cutting?

A

Dry-tanned leather gauntlet style

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6
Q

When would you use protective screens if you were performing an oxyfuel cutting operation?

A

If there were other workers nearby

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7
Q

Which type of radiant energy can cause welding flash?

A

Ultraviolet light

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8
Q

Permanent eye damage in the form of cataracts or retina damage may result from over exposure to which harmful light ray?

A

Infrared

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9
Q

Welding with wet gloves increases the risk of?

A

Electrical shock

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10
Q

When welding on metals plated with cadmium you should have on?

A

appropriate respiratory protective equipment.

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11
Q

Which metal, when heated or welded, can produce metal fume fever if the fumes are inhaled?

A

Zinc

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12
Q

Fumes are?

A

Small condensed particles of metal that have vaporized.

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13
Q

When oxygen reacts with ultraviolet light from welding, the gas produced is?

A

Ozone

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14
Q

File handles should be on files because?

A

They reduce the risk of injury.

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15
Q

The most versatile type of square is the?

A

Combination square

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16
Q

What is the recommended length of a wrap-a-round fro marking a straight line around a pipe?

A

Twice the pipe circumference.

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17
Q

C-clamps are sized according to the?

A

Distance the clamp opens.

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18
Q

Files are classified by the?

A

Length, Shape and Cut.

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19
Q

Why is filling done only on the forward stoke?

A

Because dragging the file backwards will break the teeth.

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20
Q

A safety specification to consider when selectin a grinding stone or disc is?

A

The RPM rating of the stone or disc.

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21
Q

Safe cutting of angle iron in a cut-off saw requires?

A

One vertical leg of the angle iron against the adjustable block of the clamping device.

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22
Q

It is a pictograph used to indicate the desired type of weld?

A

A Weld Symbol.

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23
Q

It is an assembled symbol giving all the information necessary for preparing and/or welding the joint.

A

A Welding Symbol

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24
Q

The tail on a welding symbol is used for?

A

Information that cannot be put into a symbol form.

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25
Q

List 3 weld symbols that have one leg perpendicular to the reference line?

A

Filled weld symbol,
Bevel groove weld symbol,
J groove weld symbol.

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26
Q

A field weld is shown on the welding symbol by a?

A

Solid black circle.

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27
Q

A ferrous metal has a high content of ?

A

Iron

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28
Q

Which statement describes a non-ferrous metal?

A

Contains little or no iron and is usually non-magnetic.

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29
Q

A metal that is a red or yellow color is most likely what type of metal?

A

Copper or Brass

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30
Q

What is the normal colour for steels and cast irons?

A

Silvery grey

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31
Q

If a metal that has fractured shows a dull grey appearance in its internal structure, with no bending before breaking, it is most likely?

A

Gray Cast Iron.

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32
Q

In using a chip test to identify a metal, what would a smooth continuous chip indicate?

A

A soft material like aluminum

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33
Q

How is cast iron distinguished from low carbon steel in a spark test?

A

The sparks given off by cast iron are short with red bursts near the grinder.

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34
Q

How can using a new hand-held file give you an estimate of a metal’s hardness?

A

If the file bites into the metal easily, it is likely a soft material.

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35
Q

Describe the oxyfuel cutting process?

A

Oxyfuel cutting is a controlled process of rapid oxidation in which steel is heated to its kindling temperature and a high-pressure jet of pure oxygen is directed to the heated area. Metal exposed to the oxygen oxidizes and is blown away by the oxygen jet stream.

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36
Q

Which ferrous-based metals cannot be cut satisfactorily with an oxyfuel cutting torch?

A

Cast irons and Stainless steels

37
Q

The space created when a piece of metal is cut is called the?

A

Kerf

38
Q

On a combination cutting torch, the oxygen valve on the torch handle must be?

A

Fully open

39
Q

The larger the orifices of a cutting tip the?

A

Thicker the plate that you can cut.

40
Q

Which metals can be readily cut using the oxyfuel cutting process?

A

Mild steels

41
Q

The ability of a metal to permanently deform under lad without breaking is known as?

A

Ductility

42
Q

The ultimate pull that a material will withstand is called?

A

Tensile strength

43
Q

Dynamically loaded structures are subject to?

A

Reversals of stress

44
Q

Which is the best example of a dynamically loaded structure?

A

The boom on a crane making a lift, and then swinging the load.

45
Q

Electrodes used in a SMAW are often called?

A

Consumable electrodes

46
Q

Electrode specifications are written by?

A

CSA and AWS

47
Q

In the AWS classification for SMAW mild steel electrodes, what does the last digit represent?

A

The major ingredient in the coating and recommended current for the best results.

48
Q

What do the first two digits in the AWS classification for carbon steel SMAW electrodes represent?

A

As-weld minimum tensile strength

49
Q

In the CSA numbering system for welding electrodes, what does the prefix letter E represent?

A

Electrode

50
Q

What is one characteristic of an E6010 electrode?

A

Deep penetration into the base metal.

51
Q

What is one purpose of the flux coating on a welding electrode?

A

To protect the molten weld puddle from atmospheric contamination.

52
Q

What is one function of the slag produced from electrode coatings?

A

To prevent the weld from cooling to rapidly

53
Q

What is the main purpose for keeping low hydrogen electrodes dry?

A

To minimize the possibility of hydrogen-induced cracking

54
Q

To weld thin materials you would likely select an electrode with?

A

A small diameter core wire.

55
Q

The National Plumbing Code of Canada approves extracted tees for ?

A

Water distribution systems.

56
Q

Tee-pulled joints for gas installations must be ?

A

Supplied by an approved manufacture and not made on-site.

57
Q

The 2 main tools used to make the mechanical tee-pulled joint are the ?

A

T-drill power unit and The notcher and dimpler.

58
Q

Each collaring head is designed for ____ size of tube to be drilled and formed.

A

One

59
Q

The ______ is part of the collaring head that is designed to pull up the collar of the tee.

A

Forming pin.

60
Q

larger mechanical tee-pulled joint tools have ______ speeds, with the ________ speed used to extract the collar.

A

2 speeds,

Lower/Slower speed.

61
Q

To properly install the branch pipe into the collar, you must align the _______ with the ______ of the pipe.

A

DIMPLES with the RUN of the pipe.

62
Q

According to the National Plumbing Code of Canada, the types of copper that can be used for mechanical tee pulled joints are?

A

Types L and K

63
Q

To braze an extracted tee you must use filler metal with a melting temperature of not less than?

A

540C or 1000F

64
Q

Flux for high-temperature soldering shows a definite change in __________________ as the temperature of the copper to which it is applied is heated.

A

Characteristic/Chemical consistency/Look

65
Q

Brazing rods come may or may not be?

A

Flux-Coated.

66
Q

Brazing rods are expensive to purchase because they have a ?

A

High silver content.

67
Q

Some filler rods come with a ___________ coating; the manufacturer gives the rod the name Silfos..

A

Phosphorous coating.

68
Q

The 2 types of torches commonly used for silver brazing are _______ and _______ torches.

A

Turbo and Oxyacetylene torches.

69
Q

Two types of brazing tips used on oxyacetylene are the _________ and the ____________.

A

Swedge and the Straight bore tip.

70
Q

The recommended type of flame for silver brazing is the _______________ which is rich in fuel.

A

Carbonizing/Reducing flame.

71
Q

The size of flame for silver brazing should be?

A

2-1/2” to 3” times the size of the neutral flames inner cone.

72
Q

When you anneal copper you cause it to ?

A

Soften the tube.

73
Q

To make consistent bends on tubing, you should use _______ or _________.

A

Lever or Mechanical benders.

74
Q

When bending a larger size of tube, the better bender to use is the?

A

Mechanical type.

75
Q

List 2 methods of placing a groove on a pipe?

A

Roll groove, for thin wall pipe.

Cut groove, for pipe over schedule 40.

76
Q

List 3 types of pipe that can be used for groove and shoulder system?

A

Steel/Galvanized,
Copper,
Stainless steel.

77
Q

Gaskets are marked by a colour stripe to identify their ?

A

Application and the products that can use them.

78
Q

To choose the correct gasket, refer to the ?

A

Manufacturer’s specs.

79
Q

Groove and shoulder joints can be _______________ to drop a line so as to create a slight slope.

A

Rotated, Twisted or Turned.

80
Q

Pipe joint deflection is caused by ?

A

Anchoring the pipe and not permitting the pipe to extend when the pressure is built in the pipe.

81
Q

List 3 methods for coping with expansion and contraction in a groove and shoulder system.

A

Build expansion loops,
Install and expansion joint,
Set up each joint so that the pipe end extend.

82
Q

When forming the collar you have to?

A

Slow down coming up

83
Q

When drilling into the pipe to form the collar you ?

A

Go quick to avoid skipping

84
Q

The collar height needs to be ?

A

3 times the wall thickness of the pipe your using

85
Q

Brazing material or silver solder has a melting point of ??

A

1000 degrees f

86
Q

What does flux prevent ?

A

Oxidization

87
Q

Silver brazing rod is known as ?

A

Silfos

88
Q

Swedge tips and straight tips produce ??

A

Long thin pointed inner cone, produce a short thick bulbous inner cone

89
Q

Acetylene flame is recommended to be ?

A

21/2x to 3x

Plumbing/Gasfitting Period 2 (CND) (7 decks)

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