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Plumbing/Gasfitting Period 1 (CND) > Safety & Materials Period 1 (CND) > Flashcards

Safety & Materials Period 1 (CND) Flashcards

1
Q

Ductile Iron Has what in it?

A

Usually Magnesium

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2
Q

Cast iron is found in one of two form?

A

Graphite flakes or Chemically dissolved

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3
Q

Minimum weight of DWV cast iron soil pipe in Alberta?

A

18kn or 4000lbs

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4
Q

Another name for Cleanouts?

A

Barrett

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5
Q

Caulking lead must be how pure?

A

97.3%

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6
Q

Cutting a short piece of cast iron with snap cutters you should?

A

Place a smaller diameter piece of cast iron inside the larger piece to prevent the cutoff shooting out.

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7
Q

Amount of lead required in a joint?

A

3/4 pound per inch diameter

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8
Q

Torque required to tighten MJ screws?

A

55 to 60 inch pounds

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9
Q

Cutting of glass pipe is done with a ?

A

Glass cutter

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10
Q

3 hazards of working with fibre glass pipe?

A

Dust, fumes & chemicals

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11
Q

Alberta building code: The minimum size of flashing is?

A

20”x20” or 500mmx500mm

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12
Q

Chemical symbol for lead?

A

Pb

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13
Q

The word plumber comes from where? and what does it mean?

A

Comes from the Latin word PLUMBUM and means worker of lead.

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14
Q

A pound of lead per square foot results in a sheet of lead being?

A

1/65 thick

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15
Q

Flashing are typically _____pounds of lead & are _____ of an inch thick.

A

5lbs & 5/64

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16
Q

Vitrified clay pipe will carry every known chemical except?

A

Hydrofluoric acid

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17
Q

4 trade names for non-metallic pipe made of asbestos?

A

Trasite, Roxite, eternite, & Century

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18
Q

when bevelling or cutting asbestos cement pipe you need?

A

Protection from inhalation of the fibres

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19
Q

Disadvantage of using cement joints in a trench?

A

It is difficult for the cement to set up if there is water in the trench.

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20
Q

4 reasons for supporting pipe?

A

*to carry the weight, *grade the pipe, *prevent sagging or deflection of the pipe, * allow for thermal movement & settlement of the building,

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21
Q

3 points that should be considered when deciding on the spacing for hangers on a steel pipe?

A

*the material from which the pipe is made, *type & location of the joints, *& size of the piping.

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22
Q

Another word for Deviation from the centre line or snaking?

A

Deflection

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23
Q

Slope on the pipe to ensure the movement of the contents in the piping system

A

Grade

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24
Q

Max Hanger Spacing: 1/2” or less Horizontal?

A

2m or 6ft

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25
Q

Max Hanger Spacing: 3/4” to 1” Horizontal?

A

2.5m to 8ft

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26
Q

Max Hanger Spacing: 1-1/4” to 2-1/2” Horizontal?

A

3m or 10ft

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27
Q

Max Hanger Spacing: 3” to 4” Horizontal?

A

5m or 15ft

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28
Q

Max Hanger Spacing: 5” to 8” Horizontal?

A

6m or 20ft

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29
Q

Max Hanger Spacing: 10” or larger Horizontal?

A

8m or 25ft

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30
Q

Max Hanger Spacing: 1-1\4” or lager vertical?

A

Every floor but more than 125% of horizontal spacing

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31
Q

Tubing, Copper, Aluminum, Stainless steel, Horizontal or vertical. all sizes?

A

2m or 6ft

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32
Q

Fasteners that are to be placed in a wall, ceiling or floor you should give consideration to what?

A

Unseen hazards in the base of the material

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33
Q

Sheet metal screws have a greater?

A

Mechanical advantage than wood screws

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34
Q

2 categories that fasteners anchors are divided into?

A

Heavy duty & light duty

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35
Q

Lubricant trapped under a bolt or stud being tightened is called?

A

Hydraulic lock

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36
Q

The holding power of anchors is greatly influenced by?

A

the cleanliness of the hole

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37
Q

Adhesive anchors are considered to be ?

A

Heavy duty anchors

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38
Q

A metal or metallic alloy that is melted and then used to join metallic surfaces together?

A

Solder

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39
Q

What sizes are copper TUBING available in?

A

1/8” to 3/4”

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40
Q

What is the difference between Soft & Silver solder?

A

Soft uses temps below 575 C
and
Silver uses temps above 575 C

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41
Q

What are the types & colours for copper?

A 
Type K - Green
Type L - Blue
Type M - Red
Type H - White
Type DWV - Yellow
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42
Q

To heat then cool which softens & makes the copper more flexible?

A

Annealing

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43
Q

What are 3 joint types & joining methods of copper?

A

Solder, Compressing & Flaring

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44
Q

The most common & oldest method of joining pipe?

A

Soldering

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45
Q

Streamline fittings are also referred to as?

A

Solder Fittings

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46
Q

The main application for type M copper is?

A

Light commercial buildings & residential

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47
Q

What is the coefficient of expansion of copper?

A

.0000171 per degree centigrade

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48
Q

Oxygen lines are run with medical type ____ copper pipe.

A

Types K & L

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49
Q

3 Applications for DWV copper?

A

Soil, Waste & drainage

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50
Q

What are the different solder types?

A

50/50, 95/5, lead free, Aquqsol, bridgit, & silvabrite 100

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51
Q

What does the 50/50 solder mean?

A

50% lead & 50% tin

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52
Q

What sizes lengths are DWV tube in?

A

1-1/4” to 6” and 12’ to 20’

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53
Q

Copper is made from ____% and has ____% impurities in it.

A

99.7% and .3%

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54
Q

Yellow Brass ____% copper ____% zinc

A

66% and 34%

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55
Q

Red brass ___% copper ___% zinc

A

85% and 15%

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56
Q

Bronze ___% copper ____% tin

A

90% and 10%

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57
Q

S.P.S means?

A

Standard Pipe Sizes

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58
Q

Copper TUBE is measured by its approx.?

A

ID

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59
Q

Copper TUBING is measured by it actual?

A

OD

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60
Q

Copper tube used on drainage & venting can be joined by 2 methods?

A

Soldering & MJ’s

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61
Q

Copper tube can be used for above ground water lines and can be joined by 4 methods?

A

Brazing, Soldering, Flaring, & Compression

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62
Q

What angle of flare is utilized in the pipe trade?

A

45 degree

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63
Q

2 purposes of fluxing?

A

To prevent oxidation & to promote wetting of the metal

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64
Q

Water lines connected to some plumbing fixtures utilize a flex tube connector. What type of seal is used?

A

Compression ferrule

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65
Q

Water lines connected to some plumbing fixtures utilize a flex tube connector. What is the minimum diameter allowed?

A

1/4” ID

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66
Q

Water lines connected to some plumbing fixtures utilize a flex tube connector. Plumbing code also stipulates a max length which is?

A

750mm or 30” (Clause 2.6.3.4.3)

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67
Q

Alloy pipe is a ferrous pipe that contains?

A

Iron ore, copper, Chromium

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68
Q

wall thickness changes as the ____ changes on the iron pipe.

A

ID

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69
Q

The ____ remains the same to enable pipe to be threaded.

A

OD

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70
Q

5 Pipe end finishes are?

A
  • Grooved,
  • Threaded,
  • threaded & Coupled
  • Plain,
  • Bevelled
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71
Q

what aids in the formation & cleaning away the swarf during the threading process?

A

Lubrication & Cooling

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72
Q

Mineral-lard oils are used for?

A

Threading or machining copper alloys

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73
Q

resistance to flow through a fully open butterfly valve is?

A

Minimal

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74
Q

Non-Ferrous pipe may contain?

A

Copper

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75
Q

Grade of carbon content to manufacture steel pipe is?

A

.1% and .2%

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76
Q

The top of a thread is known as the ?

A

Crest

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77
Q

Joint compound should be applied on the ?

A

Male end of the pipe

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78
Q

True or False: Type M copper is the least wall thickness used in flaring?

A

False

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79
Q

Most used valve in the plumbing industry? and why?

A

Ball Valve, Because of its laminar flow easy operation & easy to repair.

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80
Q

To prevent backflow or reverse flow within the piping system?

A

Check Valves

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81
Q

2 types of check valves? and 3rd for Bonus.

A

Swing Check, Lift Check & Non slam Check

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82
Q

What type of valve is most suited to throttling?

A

Globe Valve

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83
Q

Why would you choose a globe valve for your system?

A

For adjustment and/or throttling flow

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84
Q

To Start and stop flow nd can be used in any application?

A

Ball Valve

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85
Q

Sulphured oils have a tendency to stain certain non-ferrous metals such as copper. What oil is used more often?

A

Mineral lard oils

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86
Q

What materials (7) is soluble oil used for?

A

Cast iron, malleable iron, free machining steel, monel, brass, copper and aluminium

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87
Q

Never use a spiral reamer with a ?

A

Power vise

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88
Q

3 advantages to copper tube over steel pipe?

A

Malleability, ductility, good resistance to corrosion

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89
Q

3 applications of type K copper tube?

A

Water service lines, water distribution lines, low pressure steam lines, heating system, gas fitting & DWV systems

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90
Q

What is the disadvantage of copper over iron or steel?

A

Its high rate of coefficient expansion

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91
Q

uses thread cutting oil or thread cutting compounds?

A

Steel & wrought iron

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92
Q

Uses a special high sulphur content cutting oil?

A

stainless steel

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93
Q

Uses mineral lard oil?

A

Copper pipe

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94
Q

Uses soapy water?

A

Brass pipe

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95
Q

Use a lubricant for oil less cutters

A

Plastic Pipe

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96
Q

Which valves can accommodate flow in either direction?

A

Gate, Ball, Plug, Butterfly

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97
Q

4 types of disc design for globe valves?

A

Needle valve, Plug disc, conventional disc, & composition disc

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98
Q

Threads do not come in contact with fluid?

A

OS&Y valve (Outside, Screw & Yoke)

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99
Q

1 type of quarter turn valve?

A

Plug or Ball valve

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100
Q

A horizontal lift, vertical lift & swing are types of?

A

Check valves

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101
Q

most common application of a plug valve?

A

Gas fitting

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102
Q

Specific reference to a gate valve, the _____ wedge disc design is most commonly used.

A

Split

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103
Q

Compared to a straight pattern globe valve, flow through the angle pattern globe valve is?

A

Less turbulent

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104
Q

K & L soft temper type tubing is most commonly used for?

A

Residential underground water systems

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105
Q

True or False: Is brass a ferrous metal?

A

False

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106
Q

True or False: Cast iron pipe is not approved for residential service?

A

False

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107
Q

Max. working temp. of ABS pipe?

A

180F or 83C

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108
Q

Max. working temp. and pressure of CPVC pipe?

A

212F or 100C and 58psi or 400kpa

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109
Q

True or False: Can you use system 15 pipe cement with out primer?

A

True you can use system 15 without primer

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110
Q

What colour is fire suppression CPVC piping?

A

orange

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111
Q

The only plastic pipe schedule that can be threaded is?

A

Schedule 80

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112
Q

Define Nesting?

A

Smaller diameter pipes stored inside larger diameter pipes.

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113
Q

Dunnage should not be spaced more than?

A

3ft or 1m

114
Q

Dizziness or a feeling of euphoria is usually the first signs of ?

A

lack of oxygen

115
Q

Solvent cementing is to be done in temps between?

A

5C (40F) & 44C (112F)

116
Q

2 classes of plastic pipe?

A

Thermoplastic & thermosetting

117
Q

Co-efficient of expansion of ABS & PVC plastic pipe?

A

ABS - .000099C or .000055F

PVC- .0000594C or .000033F

118
Q

UV sunlight will do what to plastic pipe?

A

cause deterioration of the pipe.

119
Q

Advantages of plastic pipe over ferrous pipe?

A 
Low absorption rate,
Light in weight, 
easily prefabricated,
easy methods of joining,
economical,
absorbs vibration & shock well,
Smoother bore, 
less friction loss,
high corrosion resistance, 
unaffected by electronic corrosion,
resistant to a wide range of chemicals
120
Q

Disadvantages of plastic pipe?

A 
High co-efficient of expansion, 
low tensile strength,
Creep,
deformation under load,
low heat resistance,
low ductility,
low fire resistance
121
Q

Name 3 plastic type materials that are best suited for acid waste & vents?

A

Polyethylene, Polypropylene, Proxylene

122
Q

Type of plastic very similar to polypropylene & its colour?

A

Proxylene and Blue

123
Q

Polypropylene pipes & fittings are what colour?

A

Brown

124
Q

Plumbing code states rigid plastic pipe must be supported every _____ & flex plastic pipe should be supported _____.

A

1.2m (4ft), .8m (30”)

125
Q

Plastic acid waste pipes maybe joined by?

A

Fusion welds & Acid resistant MJ’s

126
Q

Standard length of DWV plastic pipe?

A

12ft

127
Q

2 types of plastic tube best suited for radiant panel heating?

A

Pex & PE/AL/PE

128
Q

3 types of plastic pipe for domestic water?

A

PEX, PE/AL/PE & Polyethylene

129
Q

2 types of plastic pipe for hot water heating systems?

A

PEX, & PE/AL/PE

130
Q

Required to be absolutely clean & free of rust, grease, paint & other matter?

A

Pickled & oiled pipe

131
Q

Pitch decreases as the bolt size increases. A 3/8” bolt has ____ threads

A

16 threads

132
Q

Pitch decreases as the bolt size increases. A 1/2” bolt has _____threads.

A

13 threads

133
Q

Pitch decreases as the bolt size increases. A 5/8” bolt has ____ threads.

A

11 threads

134
Q

Standard threads have a slight taper so when they are tightened into a good fitting a_____?

A

Good leak proof seal results

135
Q

Which pipe needs cleaner/primer before applying solvent cement?

A

PVC Pipe

136
Q

2 types of plastic pipe that produce toxic gases?

A

PVC & CPVC

137
Q

3 types of plastic that can be joined with solvent cement?

A

ABS, PVC, CPVC

138
Q

Prior to assembly of a compression joint it is critical that the tube be cut?

A

Square & cleaned of any burrs internally & externally

139
Q

To move very slowly in the hangers as with expansion or contraction of the plastic pipe due to temp. change?

A

Creep

140
Q

If we have a proper thread we should be able to hand tighten the joint?

A

3-4 turns

141
Q

65 R self centring hand threader will cut on pipe sizes?

A

1” to 2”

142
Q

ABS/PVC DWV horizontal piping must be installed with pipe supports every?

A

1m or 3ft

143
Q

In a 2”x2”x1” tee the one refers to the ?

A

Branch

144
Q

True or False: Copper tube K, L, & M are only available in coil for soft copper?

A

False

145
Q

The schedule number for double extra strong pipe is?

A

160

146
Q

True or False: Silicon is the element added to duriron that is responsible for its unique properties?

A

True

147
Q

True or False: A socket weld fitting has 2 weld locations 1 inside & 1 outside?

A

False

148
Q

The basic types of valves used in the pipe trade that can’t be throttled?

A

Plug & gate valves,

Check & Ball valves

149
Q

Riser clamps are available in what sizes?

A

1/2” to 20”

150
Q

When installing a dummy leg to support a piping system you must ensure?

A

the dummy leg is equipped with a vent & weep hole to allow condensate to drain & allow built up gases to escape

151
Q

which type of flange is welded to the pipe in two places?

A

lap-joint flange

152
Q

True or False: the laying length of a cast iron hub & spigot pipe is measured from where the bottom of the bell to the end of the pipe?

A

True

153
Q

True or False: Gate valves come with solid & split wedges?

A

True

154
Q

Which of the following materials could pipe for the pipe trades be manufactured from?

A

Wood, Plastic, Steel, & Lead

155
Q

True or False: Cross linked polyethylene pipe comes in 20’ straight lengths & 100’ coils?

A

True

156
Q

True or False: Acrylonitrile Butadiene Styrene comes in bell & spigot lengths?

A

False

157
Q

True or False: The type of steel pipe used for domestic water lines in commercial use would be galvanized ?

A

True

158
Q

Yellow solvent cement is used with which type of cement?

A

ABS

159
Q

A 4” cast iron 1/6 bend would be considered to be a ?

A

22-1/2 degree elbow

160
Q

The melting temp. of tin is?

A

450*F

161
Q

the measurement from the face of a standard black fitting to centre of the fitting is called?

A

the throw

162
Q

The thread angle on a tapered thread is?

A

60 degrees

163
Q

The abbreviation “NPT” stands for?

A

National Pipe Thread

164
Q

Type M Copper pipe____ be bent.

A

Can not

165
Q

Asbestos cement pipe installed above ground vertically must be supported every?

A

7.5m or 25ft

166
Q

The amount of lead required for a hot poured vertical cast iron joint is?

A

3/4” of a pound for every 1” diameter.
or
1-1/2” of a pound for every 2” in diameter

167
Q

True or False: DWV copper pipe should not be bent?

A

true

168
Q

4 of the most common ways to weld steel pipe are?

A

ERW, Spiral wed, Butt-weld, Seamless weld

169
Q

True or False: Type H copper pipe has the thinnest wall?

A

true

170
Q

Why do most tape measures have a loose end that slightly moves?

A

To compensate for the inside & outside measurements

171
Q

Why should the acetylene torch valve always be set to work above the smoke range?

A

It reduces the possibility of back fire & burn backs.

172
Q

Class C fire is classified as?

A

electrical

173
Q

Most pliers exert pressure on the grasping end through a version of a _______.

A

First class lever

174
Q

The recommended shank penetration when fastening into concrete?

A

6 to 8 times the shank diameter.

175
Q

Where are fusible plugs used?

A

on top & bottom of acetylene tanks

176
Q

The side rail of every ladder shall extend what minimum distance above any platform?

A

3ft or 1m

177
Q

Type of knot or bend used for tying two ropes of different diameters?

A

Sheet bend

178
Q

when must you wear safety glasses?

A

when there is a danger of injury or irritation to your eyes

179
Q

True or False: prior to installing a new disc on a grinder you should always perform a ring check of the disc & install only discs that have a lower RPM rating?

A

False

180
Q

True or False: Whenever possible, wrench handles should be pushed not pulled?

A

False

181
Q

How many studs are required for bolting up a 12” flange?

A

20 bolts

182
Q

What is the purpose of the packing nut in a valve?

A

To prevent fluid leakage

183
Q

What recommended bevel angle should be ground onto the flat end of a pipe to be welded?

A

37-1/2 degrees

184
Q

What is used to check the temp of the plastic for fusion welding?

A

temp Sticks

185
Q

The plastic pipe used for underground gas line is?

A

HDPE

186
Q

What does the schedule number of a pipe designate?

A

the pressure/stress ratio x1000

187
Q

Socket weld fittings are commonly used to join?

A

2” or smaller diameter piping

188
Q

An marker used to mark steel pipe for cutting?

A

Wraparound

189
Q

A weld neck flange is welded in how many locations?

A

1 location

190
Q

What approximate bevel angle must be placed on a pipe prior to welding?

A

37.5 degree

191
Q

What is the best tool for removing burrs or slag from the inside diameter of pipe that is cut?

A

Half round bastard fie

192
Q

What face must be ground on the bevel prior to butt welding?

A

Root face

193
Q

Large bore piping that requires regular disassembly should be joined by?

A

Flanged connections

194
Q

The most common cast iron flanges are also known as?

A

Companion flanges

195
Q

A flange that is beveled and has a land (root face) is known as a ?

A

Weld neck flange

196
Q

Which types of flanges always come in a matched set?

A

Orifice

197
Q

Raised face flanges have face heights of?

A

1/16

198
Q

What gasket is always used with a flat face flange?

A

Full Face

199
Q

A slip on flange is welded in how many locations?

A

2 locations

200
Q

A van stone flange is known by what other name?

A

Lap joint

201
Q

Gasket material should be stored in a?

A

Cool dry location

202
Q

For easy future removal or opening of flanged joints, apply?

A

Graphite or non-stick compound to one or both surfaces of the gasket

203
Q

Which tool should be used to separate two flanges?

A

Flange spreader

204
Q

When installing gaskets, pay careful attention to the type of fluid in the line and match the gasket to the?

A

Pressure and temperature of the line.

205
Q

Class A fire is classified as?

A

Ordinary Combustibles

206
Q

Class B fire is classified as?

A

Flammable liquids and gases

207
Q

Class C fire is classified as?

A

Electrical

208
Q

When is it necessary to install guardrails around the perimeter of the roof?

A

for a worker to fall a vertical distance greater than 3.5 metres from a
temporary work area or 1.2 metres from a permanent work area

209
Q

Class D fire classified as?

A

Combustible metals

210
Q

Class K fire classified as?

A

Combustible oil or grease

211
Q

If you are an apprentice and are entitled to Workers’ compensation because of an accident, how much compensation will you receive? Workers’ Compensation Act Section 62(2)

A

an amount that may be adjusted during the time you have become qualified in your trade

212
Q

Who is responsible for the actual usage of the personal protective equipment supplied?

A

You the employee

213
Q

Hex keys are available in _____ and _____ sizes.

A

Metric and Imperial

214
Q

A hacksaw blade with _____ teeth per inch is recommended to cut type M copper tube.

A

32

215
Q

True or False: An “excavation” is defined as: Any dug out area of ground other than a trench, tunnel, underground shaft or an open pit mine.

A

true

216
Q

What are two advantages of cast iron over copper tube for use in a drainage, waste or vent system?

A

Better corrosion resistance, Lower expansion rate

217
Q

True or False: It is recommended that all valves be installed in the horizontal position.

A

False

218
Q

What is meant by the term alloy as applied to the manufacture of ferrous pipe?

A

Other metals mixed with iron to produce special qualities in pipe

219
Q

True or False: Copper pipe is measured by its approximate ID up to 6” and by its actual OD for 8” and over.

A

False

220
Q

What are the three basic flange face types of gaskets?

A

Full face, Flat ring and Metallic

221
Q

The two materials that are not safe to fasten to when using an explosive actuated tool are?

A

Tempered steel, Spring steel

222
Q

When checking the diameter of a rope, the size must always be taken:

A

across the widest point

223
Q

True or False: The teeth of a hacksaw blade face backward, so the cutting is done with the pull stroke?

A

False

224
Q

What is the minimum recommended thickness of concrete that you can safely fasten to?

A

75mm or 3 inches

225
Q

Oil or grease in contact with pure oxygen can?

A

React violently and cause an explosion.

226
Q

The wide rollers found on a pipe cutter help prevent the _____.

A

Cutter wheel from spiralling along the pipe

227
Q

Before entering a vessel to make repairs, a plumber should insist on testing the vessel for:

A

fumes and oxygen deficiency.

228
Q

Mushroomed areas of chisels must be _____.

A

Ground away to prevent flying splinters that pose a potential hazard

229
Q

Safe working load is the:

A

breaking strength divided by the safety factor.

230
Q

Yes or No:Can a competent worker designated by the employer remove a lockout device or tag as long
as he/she has first ensured that no workers will be endangered by the removal?

A

Yes

231
Q

When working around welding operations you must wear eye protection due to three types of harmful rays that you may encounter. What are the three types of harmful rays?

A

Visible, Infrared , Ultraviolet

232
Q

What is the proper formula used to calculate the centre to face measurement for a 90º, long radius butt weld elbow?

A

NPS x 1½

233
Q

Most pliers exert pressure on the grasping end through a version of a _____.

A

First class lever

234
Q

What is the recommended shank penetration for good holding power when fastening into concrete?

A

Six to eight times the shank diameter`

235
Q

The side rails of every ladder shall extend what minimum distance above any platform or landing?

A

3 feet/ 1 meter

236
Q

The hook or tang of a tape measure is loose in order to accommodate _____.

A

Inside measurements by allowing for the hook or tang thickness

237
Q

The type of knot or bend used for tying two ropes of different diameters together is the:

A

sheet bend.

238
Q

When must you wear safety glasses?

A

When there is a danger of injury or irritation to your eyes.

239
Q

True or False:Prior to installing a new disc on a grinder you should always perform a ring check of the disc and install only discs that have an rpm rating lower than the RPM rating of the tool?

A

False

240
Q

When tightening a fitting onto a pipe, the fitting should be turned by hand approximately 4 to 6½ times and made up with the aid of a wrench approximately _____ to _____ turns.

A

2 to 3 turns

241
Q

What is the purpose of the Packing nut in a valve?

A

To hold the packing which prevents fluid leakage

242
Q

What does the schedule number of a pipe designate?

A

The schedule number of a pipe designates the pressure/stress ratio X 1000.

243
Q

What wrench would you use to tighten a spud nut on a water closet with? and what size does the wrench only come in?

A

Spud wrench and 12”

244
Q

A version of a first class lever?

A

Pliers

245
Q

A version of a third class ever?

A

Pry bar

246
Q

Edge - the narrow section called a safe edge when no teeth are cut into it. Is on what tool?

A

File

247
Q

NPT? and ASPT?

A

National Pipe Thread and American Standard Pipe Thread

248
Q

Uses a blade with 32 teeth per inch on thin-walled tubing and conduit and on sheet metal thinner that 18 gauge?

A

Hacksaw

249
Q

3 cardinal rules of tool maintenance?

A

Clean, Oil & replace

250
Q

How many strokes per minute should you stroke a hacksaw?

A

40 to 50 strokes

251
Q

The employer shall ensure that cylinders containing acetylene are?

A

Secured in a vertical position

252
Q

If you are to use CO2 for freezing, what is the first thing to check for?

A

That you have enough CO2 on hand to complete the job.

253
Q

Files cut when _____ ______ only.

A

Pushed Forward

254
Q

What must take place in solids and liquids before burning can occur (before the fuel can ignite into flames)?

A

Vaporization of the surface must take place.

255
Q

True or False: A trench is defined as an elongated dug out area of ground whose depth is equal to its width at the bottom?

A

False

256
Q

Why are the cylinder valves cracked before the regulators are attached?

A

To remove dust or dirt from the cylinder valve.

257
Q

True or False: The two purpose of the lead in a caulked cast iron joint are to seal the joint and prevent the oakum from peeling out over time?

A

False

258
Q

Before butt welding plastic pipe and fittings, you must ensure that the_____.

A

The pipe ends are square.

259
Q

How much does a thread taper amount to if extended to 1 FT in length?

A

The taper amount is 3/4” increase in diameter at 12”.

260
Q

The loss of pressure in the line caused by the valve or fitting in relationship to a length of pipe is defined as?

A

Equivalent length.

261
Q

Four characteristic properties of gray cast iron are?

A

Hard, Brittle, Good wear resistance, Good corrosion resistance

262
Q

When must your employer ensure that you are wearing safety footwear?

A

Where danger of injury to your feet exists.

263
Q

What is the primary safety feature of an industrial plant site?

A

Automatic sprinkler system.

264
Q

When are you ineligible for compensation as the result of an accident?

A

If the injury is attributable primary to your serious and wilful misconduct.

265
Q

Above what height must an employer have a guardrail erected for a temporary work area?

A

3 meters

266
Q

At what height must guardrails be installed on scaffold platforms?

A

Not less than .92m nor more than 1.07m

267
Q

If platforms are a specified height, a toe-board must be installed when there may be workers below. What is the platform height that requires toe-boards to be installed?

A

For materials to fall more than 2m or 4m from a temporary platform.

268
Q

What is the minimum distance from the edge of the trench that the material removed from an excavation (spoil pile) must be kept?

A

3.28ft or 1 meter

269
Q

True or False: It is a workers responsibility to ensure that he/she is wearing appropriate eye protection when there is a danger of injury to the eye?

A

False

270
Q

True or False: The load to which a scaffold is subjected should at no time exceed the equivalent of 1/2 of the load for which it is designed?

A

False

271
Q

True or False: When installing shoring in a trench, a worker shall use a ladder and work upward from the bottom of the trench?

A

False

272
Q

True or False: A worker shall not work 1m from the top of a portable single or extension ladder?

A

False

273
Q

Housekeeping which provides safe working conditions shall be ensured by the?

A

Employer

274
Q

Workers and equipment shall not operate within ____ meters of live overhead power lines.

A

7 meters

275
Q

Operators of explosive activated fastening tools must be _____ and _____ in the use of each model of tool the operator may be called on to use.

A

Instructed and Trained

276
Q

True or False: A worker shall grind on the side of an abrasive wheel but shall not a adjust a tool rest while the grinder is in motion?

A

False

277
Q

Sharp edges which could cause damage to rigging equipment must be?

A

Guarded

278
Q

Wooden scaffolding must be made of ______ ______ lumber and must have a strength _____ times the weight of the load.

A

Unpainted, dressed lumber and a strength 4 times the weight of the load.

279
Q

True or False: A trench is defined as an elongated dug out area of ground whose depth is equal to its width at the bottom.

A

False

280
Q

True or False: All ingredients of the controlled product are listed in the MSDS?

A

False

Plumbing/Gasfitting Period 1 (CND) (6 decks)

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