Line F Flashcards
1
Q
Tool steel is different from mild steel because it has a higher content of
carbon
pig iron
manganese
silicon
A
carbon
2
Q
Stainless steel is an alloy of iron, nickel and
zinc
chromium
cobalt
tool steel
A
chromium
3
Q
Because of its low electrical resistance, lightness and corrosion resistance, electrical transmission lines are often made from
aluminum
brass
copper
stainless steel
A
aluminium
4
Q
Tensile strength of a material is the ability to withstand forces that tend to
pull it apart
crush it
bend it
wear it down
A
pull it apart
5
Q
If stored in moist conditions, almost all ferrous metals are subject to
rot
rust
dissolving
shrinkage
A
rust
6
Q
Brass is an alloy of zinc and
iron
nickel
copper
aluminum
A
copper
7
Q
Ferrous metals are metals that contain at least 5%
zinc
lead
iron
carbon
A
iron
8
Q
If galvanized metals are allowed to sit in water for any length of time they will
dissolve
rust
discolour
lose their coating
A
discolour
9
Q
It is acceptable to drill through an engineered beam if you have to provide access for a conductor to pass through
A
False
10
Q
Pressure treated wood is safe to cut without a dust mask.
A
False
11
Q
Before cutting into a finished surface, it is important to:
Confirm the location
Make sure your installation does not conflict with other components in the assembly.
Plan ahead
All choices are correct
A
All choices are correct
12
Q
OSB is made by compressing a combination of wood strands and glue.
A
True
13
Q
It is OK to drill a hole through a TJI.
A
True
14
Q
No two pieces of wood are alike in either colour or markings
A
True
15
Q
Wood is considered a good conductor of heat
A
False
16
Q
Wood can be reused when making alterations.
A
True
17
Q
Identify the type shake shown below.
ring shake
heart shake
star shake
cup shake
A
star shake
18
Q
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
A
crock
19
Q
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
A
bow
20
Q
Knots are the result of
accumulations of tannins and resins
the natural formation of branches from the main stem of a tree
abnormal hardening due to a leaning trunk
insect infestation
A
the natural formation of branches from the main stem of a tree
21
Q
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
A
twist
22
Q
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
cup
A
cup
23
Q
The thickness of sheet metal is designated by
a letter
its weight per square foot
its thickness in thousandths of an inch
a gauge number
A
a gauge number
24
Q
What colour will copper have when oxidized?
red
black
yellow
green
A
green
25
When a metal combines with oxygen and a film is formed on its surface, the metal has
tempered
annealed
oxidized
alloyed
oxidized
26
Alloys are composed of two or more elements, at least one of which must be
iron
metal
carbon
ferrous
metal
27
What is an advantage of using wood in the electrical industry?
Its ability to withstand high heat
Its ability to conduct electricity
It is strong and easy to fasten to
Its ability to decay when kept moist
It is strong and easy to fasten to
28
When working with pressure treated lumber a worker should always:
Refer to the MSDS
Wear appropriate PPE
Make sure waste is properly disposed
All choices are correct
All choices are correct
29
Alternate layers of wood in the form of a sheet is known as
OSB
Plywood
Rough cut
An Engineered Beam
Plywood
30
When cutting pressure treated lumber you should?
Wear hearing protection
Always use a chainsaw
Check the MSDS and wear the appropriate PPE
Wear safety glasses and check the OSB
Check the MSDS and wear the appropriate PPE
31
A standard sheet of plywood that is 4 layers in thickness is:
5/8" Thick
1" Thick
3/4" Thick
1/2" Thick
1/2" Thick
32
Plywood is a common material used to provide backing for electrical equipment to be securely attached to.
True
33
Identify each of the structures shown in the illustration below
inner bark
pith
sapwood
outer bark
cambium layer
annual or growth rings
heartwood
rays
a. inner bark. e. annual or growth rings
b. pith. f. sapwood
c. cambium layer. g. rays
d. outer bark. h. pith
34
Identify the type shake shown below.
ring shake
heart shake
star shake
cup shake
heart shake
35
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
kink
36
Identify the type warp shown below.
cup
bow
twist
diamonding
crock
kink
diamonding
37
Identify the type shake shown below.
ring shake
heart shake
star shake
cup shake
cup shake
38
Sap-stain fungi cause discoloration in wood but have no effect on the structural strength of wood
True
39
Identify the type shake shown below.
ring shake
heart shake
star shake
cup shake
ring shake
40
Bowing is the result of
the difference in shrinking rates on the tangential and radial planes
the inclusion of reaction wood in a board
spiral grain
improper drying techniques
improper drying techniques
41
For metric fasteners, even though the thread pitch remains the same, an increase in diameter will change the thread from coarse to fine.
True
42
The nominal size of bolts includes the following two measurements
thread diameter and thread length
bolt shank diameter and bolt head size
bolt shank diameter and penetration length
crest diameter and root diameter
bolt shank diameter and penetration length
43
The initials UNF, as used with thread series, means
Universal Number Form
Unified Neutral Finish
Universal National Fine
Unified National Fine
Unified National Fine
44
Thread pitch can be described as the
angle of the thread flanks
distance between adjacent threads
depth of the thread groove
thread slope in relation to the axis of the bolt
distance between adjacent threads
45
In "½ - UNC 2A", the UNC indicates
thread size
pitch
imperial thread system identification
nominal thread diameter
imperial thread system identification
46
In ½ - 13 UNC 2A, the “½” indicates
threads per inch
actual thread
thread series
nominal thread diameter
nominal thread diameter
47
If a larger screw can be used, stripped internal threads can be repaired
by drilling and re-tapping the hole
by re-tapping using a finer thread pitch
by re-tapping using a coarser thread pitch
using a self-tapping nut
by drilling and re-tapping the hole
48
The trade name for thread inserts is
Jiffy Thread
Thread-Coil
Heli-Thread
Heli-Coil
Heli-Coil
49
The stamping ¼ - 20 on a die indicates the
major diameter and number of threads per inch to be cut
inside diameter and pitch of thread to be cut
minor diameter and thread angle to be cut
root diameter and effective length of thread to be cut
major diameter and number of threads per inch to be cut
50
The particular drill used to produce a hole for tapping is called a
bottoming drill
die drill
tap drill
tapered drill
tap drill
51
The tool used for cutting external threads is the
tap
die
thread chaser
screw cutter
die
52
The three styles of tap are the
taper, plug, bottoming
taper, bottoming, straight
straight, tapered, notched
plug, taper, end
taper, plug, bottoming
53
If a stud requires that you drill a hole to receive a stud-extractor, the hole should be approximately
3 mm (1/8") in diameter
3/4 the length of the stud
1/2 the diameter of the stud
1/4 the length of the stud-remover
1/2 the diameter of the stud
54
Damaged external threads may be repaired with a
threaded tap
Heli-Coil
thread chaser
thread gauge
thread chaser
55
A machine screw that has a slight taper at the threaded end and a notch or groove cut into its threads is a
self-drilling screw
self-tapping screw
sheet metal screw
self-drilling, self-tapping screw
self-tapping screw
56
Which machine screw number indicates the largest diameter?
1
10
12
24
24
57
A slotted hex nut is designed to be used with a
lock washer
cotter pin
self-tapping screw
cap screw
cotter pin
58
A stover nut is a type of
jam nut
nut used with stove bolts
castellated nut
self-locking nut
self-locking nut
59
The fastener in Figure 1 is
a cap screw
an oval head screw
a flange bolt
a square head bolt
a flange bolt
60
Three radial slash marks embossed on the head of a cap screw indicate it is
a grade 5 bolt
a grade 3 bolt
made of aluminum
national coarse
a grade 5 bolt
61
A threaded fastener that is used with a nut is called a ___________ .
bolt
screw
cap screw
stover
bolt
62
A threaded fastener is called a bolt when it
is larger than ¼"
is used with a nut
is made with a UNC thread
has a hex head
is used with a nut
63
The groove cut in a shaft to accommodate a key is a
clevis
key-way
shear pin
lock washer
key-way
64
A semi-circular key made from round stock and cut in half is a
taper
clevis
woodruff
spring
woodruff
65
Which of the pin types listed below is used to align machinery parts during assembly?
taper pins
headed pins
clevis pins
spring-locking pins
taper pins
66
A pin that is used to prevent damage to machinery from overloading is a
spring pin
shear pin
split pin
convenience pin
shear pin
67
The pin illustrated in Figure 1 is a
Quik-lock pin
bent-leg pin
ring pin
spring-locking pin
Quik-lock pin
68
To fasten items to drywall where no backing exists, you would use
a toggle bolt
a lag bolt
an expansion bolt
a carriage bolt
a toggle bolt
69
The screw in Figure 6 has a
plain shank
reduced shank
no shank
twist shank
plain shank
70
What is considered the most widely used nail mainly used for framing buildings?
Common nail
Box nail
Ring nail
Spiral nail
Common nail
71
The anchor shown in Figure 7 is
a self-tapping screw
an expansion shield
a wedge anchor
a plastic anchor
a wedge anchor
72
Machine screws are available in diameters up to
1/8"
1/4"
3/8"
1/2"
3/8"
73
An escutcheon pin
has a large, flat head
is double-headed
is actually a brad head
has a polished, dome-shaped head
has a polished, dome-shaped head
74
The nails used to attach drywall have a head that is
tapered to a thin edge
double-headed
larger than a roofing nail
similar to a finishing nail
tapered to a thin edge
75
Galvanizing a nail increases its resistance to
shear forces
withdrawal
bending
splitting
withdrawal
76
Galvanizing a nail increases its resistance to rust or corrosion
True
77
The wood screw in Figure 5 has a
round head
oval head
flat head
pan head
pan head
78
What fittings are used to join pipe in a straight line?
Bushing
Coupling
Close nipple
Cap
Coupling
79
Pipe schedule refers to
length
wall thickness
thread pitch
internal threads
wall thickness
80
Where is a pipe thread joint compound applied?
External threads, from the start to the last threads on the pipe
Internal threads, from the start to the last threads on the pipe
Internal threads, starting at the second thread including the perfect threads
External threads, starting at the second thread
External threads, starting at the second thread
81
Pipe thread compounds are used to
make installation easier
allow for misalignment of parts
increase torque required to tighten
lubricate and seal
lubricate and seal
82
The taper of a pipe thread is for
ease of starting
smoother threading
alignment
sealing
sealing
83
Pipe is sized by
inside diameter
outside diameter
nominal diameter
wall thickness
nominal diameter
84
One disadvantage of plastic tubing is that it
is difficult to cut
is relatively heavy to handle
will not stand excess heat
cannot be used for corrosive liquids
will not stand excess heat
85
An inverted flared tube fitting has an external thread on the
body
nut
sleeve
tube
nut
86
What colour marking is used to identify type L copper pipe?
Green
Black
Blue
Red
Blue
87
The colour marking is used to identify type L copper pipe is green?
False
88
Tubing size is designated by the
actual inside diameter
nominal inside diameter
actual outside diameter
nominal outside diameter
actual outside diameter
89
Compression fittings may be used on soft plastic tubing providing that the tubing is
pre-heated
flared
fitted with an internal sleeve
wrapped with Teflon tape
fitted with an internal sleeve
90
What flare fitting is better suited to hydraulic fittings and steel pipe?
SAE single flare
inverted flare
compound flare
triple flare
inverted flare
91
Steel brake tubing is constructed with
stainless steel
copper cladding
two layers and a galvanized finish
double walls and tin plating
double walls and tin plating
92
Rolls of different sizes of the same type of tubing should be stored
in one pile
in ascending order
in separate rooms
on the tops of the piles
in ascending order
93
Black steel pipe fittings should be stored in an area that is free from
sunlight
excessive heat
oil or grease
moisture
moisture
94
What would be an acceptable practice when storing pipe, fittings and tubing?
Store heavy fittings on the lower shelves
Store copper and steel elbows in the same bin
Do not store copper tubing coils on their sides
Store steel pipe vertically straight up
Store heavy fittings on the lower shelves
95
Tubing supplied in straight lengths should be stored
in stacks
in bundles
like pipe
on a hook
like pipe
96
Partially used rolls of tubing should always be stored
with the tubing tied
away from the rest of the tubing
on the top of unused rolls
with the fittings
on the top of unused rolls
97
Pipe stored lying flat should be in racks that protect the pipe from
sliding
rolling
sagging
light
rolling
98
To permit a threaded fitting to be attached to a component without having to rotate the hose, you need a
left and right hand fitting
tapered thread fitting
self threading fitting
swivel end fitting
swivel end fitting
99
The ability of a hose to withstand high pressure will be increased if constructed with
solid rubber
wire braid
canvas
fabric
wire braid
100
Notches on high pressure fittings also indicate the
length of the hose
length of the skive
outside diameter of the hose
inside diameter of the hose
length of the skive
101
Socket less hose fittings are made more secure with the addition of
clamp
sealant
skive
coat of oil
clamp
102
To find out which materials will or will not affect a hose you must
check the colour coding
read the manufacturer's specifications
compare the old hose
test a section yourself
read the manufacturer's specifications
103
The flare angle of a JIC flare fitting is
17°
27°
37°
47°
37°
104
Hoses that must withstand a negative pressure (suction hoses) are prevented from collapsing by
screen liners
mesh exteriors
interior steel wire coils
several thin layers in their walls
interior steel wire coils
105
In order to prevent the flow of a pressurized fluid when disconnecting a quick-coupler, you must install the
coupler on the pressurized side of the connection
nipple on the pressurized side of the connection
pressure reducer in front of the fitting
shut off valve in front of the coupling
coupler on the pressurized side of the connection
106
Over-penetration of glue can result in a joint that is
swollen
too tight
starved
shrunken
starved
107
The use of contact cement requires
clamping for four hours
heating to 100 C
a hardener to set
no clamping
no clamping
108
Which of the following is least moisture resistant?
polyvinyl acetate
epoxy
urea resin
silicone
polyvinyl acetate
109
Which of the following is true when using silicone?
No special precautions are required due to the nontoxic nature of the material.
Use only in well-ventilated conditions and do not ingest the material or leave it on the skin.
A respirator, gloves and goggles should be worn at all times.
Do not operate power equipment near curing silicone adhesives due to the flammable nature of the fumes.
Use only in well-ventilated conditions and do not ingest the material or leave it on the skin.
110
The main difference between adhesives and sealants is that sealants typically have higher strength and lower elongation than adhesives do.
False
111
What is often added to silicon for use in high moisture areas?
elongation compounds
inert filler materials
mildew-resistant chemicals
wax
mildew-resistant chemicals
112
Which of the following is used to prevent moisture or air from entering the joint between a doorframe and the siding?
polyvinyl acetate
polymerizing adhesives
aliphatic resin
silicone
silicone
113
Which adhesive accepts stain more readily?
polyvinyl acetate
white glue
aliphatic resin
silicone
aliphatic resin
114
The thread pitch for the metric system designates the
threads per centimetre
distance between adjacent crests measured in centimetres
threads per millimetre
distance between adjacent crests measured in millimetres
distance between adjacent crests measured in millimetres
115
The location of the grade marking on a bolt is on the
bolt head
tip
shank
key-way
bolt head
116
Which type of pin has a hollow center, is split lengthwise, and is chamfered at both ends?
cotter
pivot
taper
spring
spring
117
Bolt washers that are used to prevent the nuts from coming loose are
plain washers
flat washers
Woodruff washers
split-ring lock washers
split-ring lock washers
118
Large fittings should always be stored
first
up high
where they will be needed
down low
down low
119
The number "-16" indicates an inside diameter of
½"
1"
1½"
2"
1"
120
Two types of threaded fittings used to connect hoses together or to other fittings are
left and right threaded
external and internal
low and high pressure
straight and elbow
external and internal
121
Which type of tube fitting is least able to withstand heavy vibrations?
SAE flared
solderless compression
inverted flared
double compression
solderless compression
122
To block off the end of a steel pipe you should use a
cap
plug
drop
reducer
cap
123
solid steel pins with a slight chamfer at each end are known as
clevis pins
tapered pins
cotter pins
dowel pins
dowel pins
124
Thread pitch is specified in
taper per foot
threads per inch
threads per foot
inches per thread
threads per inch
125
Metric thread pitch is given in
metres
millimetres
threads per millimetre
inches
millimetres
126
When starting a thread in a hole, use the
taper tap
plug tap
end tap
straight tap
taper tap
127
Thread inserts are not only used for repairing damaged threads, but also to
provide a strong thread for soft material
make the threaded hole deeper
provide a coarser pitch thread
plug holes
provide a strong thread for soft material
128
Castellated or slotted nuts are prevented from turning on the bolt by
friction
their oval shape
cotter pins
headed pins
cotter pins
129
To run a branch line off a piping line, one would use
an R.H. coupler
a split fitting
a tee fitting
an elbow
a tee fitting
130
What type of copper tube is available in hard only?
L
K
O
DWV
DWV
131
Fittings stored in their shipping packages should be placed on shelving so that you can see the
contents
labels
top of the package
quantity of each package
labels
132
Fittings should be stored in groups according to their
size and type
shape
price
weight
size and type
133
The designation "-10" on the side of a hydraulic hose indicates the hose
is able to withstand 10 atmospheres of pressure
has an inside diameter of 10/16"
has an inside diameter of 10 mm
is rated for 10 psi
has an inside diameter of 10/16"
134
The angle between thread flanks is usually
60°
65°
70°
75°
60°
135
The major diameter of a screw thread is measured at the
crest
root
pitch
helix
crest
136
When first using a thread die you should adjust it so that it cuts threads
as deeply as possible
as shallow as possible
when turned backward
that are UNF
as shallow as possible
137
To reform internal threads and bring the threaded hole back to its original size you could use
a Heli-Coil
an anti-seize fluid
a tap extractor
a self-tapping coil
a Heli-Coil
138
If a cap screw is broken flush to the surface of the threaded hole you may be able to extract it using
a screwdriver
a wrench
anti-seize fluid
a stud extractor
a stud extractor
139
When starting to cut threads with a die you should make sure that
the die is level
the widest part faces away from the rod
all cutters make contact with the rod
all the force is applied to one handle
all cutters make contact with the rod
140
The tool illustrated in Figure 1 is used to
break the tang on a Heli-Coil
remove a broken tap
clean the flutes of a tap
measure the diameter of a threaded hole
remove a broken tap
141
Plug taps are tapered along their length for approximately
half their length
1 thread
5 threads
10 threads
5 threads
142
A hole drilled only part way into a material is known as a
short hole
through hole
part hole
blind hole
blind hole
143
The correct procedure for cutting threads with a tap or die is to
turn continuously in one direction
turn clockwise until you finish the thread, then return all the way to the starting point
advance the tool one or two revolutions, then back up half a turn and repeat throughout threading procedure
turn as fast as possible so the cuttings will fly away from the tap or die to prevent thread damage
advance the tool one or two revolutions, then back up half a turn and repeat throughout threading procedure
144
A threaded fastener that has no head and is threaded at both ends is known as a
cap screw
double bolt
thimble
stud
stud
145
A threaded fastener that has screw threads on both ends and has no head is referred to as a
double-nut bolt
stud
machine screw
cap screw
stud
146
The machine screw head style illustrated in Figure 3 is
a socket head
a pan head
a round head
an oval head
an oval head
147
A thread gauge is used to determine
thread angle
thread pitch
thread diameter
the slope of the thread faces
thread pitch
148
Cotter pins are used to lock
stover nuts
jam nuts
castellated nuts
pall nuts
castellated nuts
149
Grade markings as illustrated in Figure 2 make reference to the bolt's
thread pitch
tensile strength
diameter
head style
tensile strength
150
Convenience pins are available in two common types: Quick-lock pins and
grooved pins
taper pins
Woodruff pins
spring-locking pins
spring-locking pins
151
To prevent nuts or bolt heads from damaging machinery parts, you should use
mild steel bolts
castellated nuts
flat washers
key-ways
flat washers
152
Taper keys require a key-way that is cut
in a semicircle
only on the shaft
at a slight taper
deep enough to accept the gib
at a slight taper
153
The numbers 8.8 embossed on the head of a metric cap screw indicate the
diameter in millimetres
length in centimetres
wrench size in millimetres
tensile strength of the material
tensile strength of the material
154
One common method for securing a gear or pulley is to use a
cotter pin
key
spring-locking pin
toothed washer
key
155
Castellated or slotted nuts are prevented from turning on the bolt by
friction
their oval shape
cotter pins
headed pins
cotter pins
156
The type of pin designed to align machinery parts during assembly is the
clevis
cotter
headed
dowel
dowel
157
The nail in Figure 1 is a
twist nail
ring nail
casing nail
roofing nail
twist nail
158
What bolt has a spring-loaded foldable wing nut?
T nut
Expansion anchor a squared end
toggle bolt
wedge sleeve anchor
toggle bolt
159
The bolt with a tamperproof head is called a
lag bolt
carriage bolt
stove bolt
lock bolt
carriage bolt
160
The nail in Figure 2 is a
finishing nail
casing nail
flooring nail
hardboard nail
casing nail
161
What large wood screw has square or hexagonal head?
Lag bolt
Machine bolt
Wafer screw
Self tapping screw
Lag bolt
162
The ring nail that is used to attach drywall is
made of silicon bronze
heat-treated to prevent rust
galvanized and has a thin head
heat-treated to make it stiffer
galvanized and has a thin head
163
Casing nails used on exterior work should be
set below the surface
heat-treated
blued
galvanized
galvanized
164
What are four shapes of screw heads?
Round, square, hexagonal and flat
Flat, oval,hexagonal and cup
Flat, pan, oval and round
Round, dish, saucer and cup
Flat, pan, oval and round
165
Cabinet components are nailed together with
spiral nails
ring nails
common nails
finishing nails
finishing nails
166
What type of fastener is designed to hold in concrete with lag bolts?
Expansion shield
Lead plug
Fiber plug
Toggle bolt
Expansion shield
167
Duplex nails are used for concrete formwork because of their
tremendous holding power
shear resistance
ease of removal
thin shanks
ease of removal
168
The nail most susceptible to rusting is the
galvanized nail
casing nail
concrete nail
ring nail
concrete nail
169
The common nail
has a flat head and sharp point
has a bright finish to resist corrosion
has a bulbous-shaped head and a sharp point
is mainly used for interior work
has a flat head and sharp point
170
If the nut end of a bolt is inaccessible during assembly, you can use a bolt with a
lock nut
hex nut
T-nut
scalloped nut
T-nut
171
Which method do you use to hold adhesive and epoxy anchors in place?
mechanical fastening methods
heat-treating methods
chemical-curing methods
powder-actuated methods
chemical-curing methods
172
Standard PVC conduit is known as
schedule 10
schedule 30
schedule 40
schedule 80
schedule 40
173
The angle of the flare used with an SAE flare fitting is
Question 1 options:
37°
45°
47°
60°
45°
174
Double compression fittings compress the tubing against the
two sleeves
sleeve and the nut
nut and the tapered seat
machined seat and the body
sleeve and the nut
175
Plastic tubing cannot be subjected to
high vibrations
low pressure
low temperatures
high temperatures
high temperatures
176
One disadvantage of copper tubing is that it
will corrode easily
becomes softer with use
is subject to work hardening
is difficult to solder
is subject to work hardening
177
If soft copper tubing is subjected to repeated bending it will become
softer and weaker
stronger
hard and brittle
annealed
hard and brittle
178
Before tightening a double compression fitting the tube must be
fully inserted
soldered
slipped together one piece at a time
tightened before being installed
fully inserted
179
Compression fittings used on plastic tubing require an additional part located
on the exterior of the tubing
over the end of the tubing
at the back of the nut
inside the tube
inside the tube
180
Rolls of tubing should be stored on
pegs
edge
racks
their sides
their sides
181
High pressure fittings are identified by
letters
numbers
notches
colours
notches
182
Hoses that must be connected and disconnected frequently can be fitted with a
swivel coupler
shut off valve
quick coupler
reusable connection
quick coupler
183
To be sure that a new hose will not be affected by the substances it will contain you must
test a short section of the hose
make sure it is the same colour as the old hose
increase the pressure
read the specifications
read the specifications
184
The size of a hose is determined by measuring its
pressure rating
outside diameter
wall thickness
inside diameter
inside diameter
185
Which of the following is an example of a polymerizing adhesive
polyvinyl acetate
aliphatic resin
urea resin.
contact cement
urea resin.
186
Which of the following is flammable?
polyvinyl acetate
solvent base contact cement
aliphatic resin
water base contact cement
solvent base contact cement
187
To cure properly, most adhesives require a temperature of about
14°C
20°C
27°C
30°C
20°C
188
A solvent base contact adhesive
sets more slowly than a water-base contact cement
forms a bond that is not heat-resistant
is not flammable
is not toxic
forms a bond that is not heat-resistant
189
Which of the following would provide a flexible water tight seal with mildew resistance
polyvinyl acetate
urea resin
epoxy
silicone
silicone
190
Some glue can be used to fill gaps in loose-fitting joints.
True
191
What is often added to silicon for use in high moisture areas?
elongation compounds
inert filler materials
mildew-resistant chemicals
wax
mildew-resistant chemicals
