5-6 Month Final Flashcards
(180 cards)
1
Q
What is the weight of a 36-foot American Standard I Beam designated S15x42.9
equation W=w/ft x L
A
1544.4lb
2
Q
If both ends of the sling are attached to the hoist hook and a load is suspended by the center of the sling, what hitch is being used?
A
double basket
3
Q
Which of the following hooks has a point designed to fit in a hole in the load?
A
sorting hook
4
Q
If a sling leg is attached to a suspended load at an angle of less than 90°, the force acting on the sling leg
A
increases as the sling angle gets smaller
5
Q
A hook should be removed from service if
A
the tip is twisted more than 10% out of line
6
Q
If the strands of a wire rope appear to spiral down to the right, and if the wires in the strands appear to be parallel to the rope axis, the wire rope is
A
right regular lay
7
Q
If a wire rope is classified as 6 x 37, the figure 37 means that
A
each strand of the rope contains a nominal 37 wires
8
Q
The following factors all affect wire-rope strength. In which one is the D/d ratio important?
A
bending over a curved surface
9
Q
Which of these wire rope end fittings is the most efficient (assuming all are prepared correctly)
A
speltered socket
10
Q
If a rigger finds that a wire rope sling is kinked, he should
A
remove it from service
11
Q
Which of the following identifications would be most likely to appear on the links of a chain suitable for overhead lifting?
A
800
12
Q
The specification for welded-link chain that corresponds to a wire rope’s rated load is called the chain’s
A
working load limit
13
Q
If an alloy steel chain sling has been subjected to temperatures over 1000°F (540°C)
A
it should be removed from service
14
Q
There is a slot in one of the standard end fittings for metal mesh slings. It allows the sling to be used in a _____ hitch
A
choker
15
Q
You should recommend removing a metal mesh sling from service if
A
one welded joint at the edge of the sling is broken
16
Q
The strongest and most popular of the synthetic-fiber ropes is
A
nylon
17
Q
To avoid sharp bending and abrasion, the eye of a fiber-rope sling should include a
A
thimble
18
Q
A fiber-rope sling should be removed from service if it
A
shows kinking
19
Q
The rated load, or capacity of an encased polyester sling is indicated by the
A
color of the cover
20
Q
You should remove a synthetic-web sling from service if
A
it is scorched
21
Q
A pocket wheel is part of a(n)
A
overhead manual chain hoist
22
Q
The purpose of an upper limit switch is to
A
keep the load block from rising dangerously high
23
Q
The difference between top-running and underhung cranes lies in
A
how the end trucks of the bridge beams are supported
24
Q
When a rigger lifts a load a few inches, then stops to see if the load drifts downward, what is he checking?
A
hoist brakes
25
Wire rope should be removed from hoist service if the rigger finds
two broken wires at a socketed end fitting
26
In a crane operation involving several people:
the operator must respond to a "stop" signal from anyone
27
You should not use metal-mesh slings
if the spirals do not move freely
28
When working with floor-operated hoists and cranes, you should make sure that
obstructions can be cleared by moving the load
29
One edge of the load serves as a pivot during _____ turning
one-hook
30
When should blocks or other holding devices placed at the location where a load will be set?
before the load is lifted
31
The height of a movable sectional metal scaffold that measures 4x8 ft at the base should not exceed _____ ft
16
32
A hydraulic scissors lift of the larger type can safely support _____ workers and their equipment
2
33
Each worker on a suspended scaffold must wear a safety belt connected to a lanyard attached to
the structure being worked on
34
When you secure a scaffold with guy wires, what accessories do you use to tighten the wires to the correct tension?
Turnbuckles
35
A wooden ladder must NOT be coated with
paint
36
Before new equipment arrives at the plant, plans for installing it are made by the
plant engineer
37
When pouring a concrete footing, you should hold the steel rods in position with
tie wires
38
The best materials for filling around a foundation are gravel and
ground concrete slabs
39
The type of bolt to anchor the equipment is usually specified by the
equipment manager
40
How long must new concrete sit before you install equipment on it?
28 days
41
Retainers on the sides of horizontally reciprocating equipment keep it from
walking
42
To isolate anchor bolts when mounting equipment on pads, surround the bolts with
neoprene tubing
43
What type of wrench should you use for tightening anchor bolts?
Torque
44
To drill anchor bolt holes larger than 1 1/2 in., you should use a
core bit with a diamond or carbide bit
45
You should not use a concrete mix to grout anchor bolts, because the concrete
shrinks when it sets
46
If new equipment is damaged in shipment, you should report it to the
carrier
47
What must you do first before disconnecting the electric wiring to existing equipment?
shut off the power
48
What is the least number of rollers you should use under a load on a skid
three
49
When moving equipment with a crowbar, what should you use between the bar and the floor?
a wood block
50
If you have no clearance to remove a sling after setting the equipment down, you should lower the equipment onto
wedges
51
To keep your body heat from affecting a master precision level, you should handle it by its
nonheat-conductive top plate
52
To support a level on an inverted V-shaped way, use a precision
V-block
53
To support a level across machine tool ways in different planes, you should use precision ground parallels or
gauge blocks
54
The common dial indicator is usually used with a _____ base.
magnetic
55
When an alignment screw is finally set, you can prevent further movement by
applying a sealing compound
56
The external air lines on equipment usually terminate just beyond a filter or a
regulator
57
If the fluid in a system is thick, you can control it with a ______ check valve.
ball
58
You can keep the fluid pressure in a line near a preset level with a ____ valve.
regulating
59
A copy of the manufacturer's test data is often attached to the ____ of new equipment.
manual
60
High temperatures during equipment startup is usually caused by
poor lubrication
61
A metal's ability to be stretched into wire without breaking is called its _____. Its ability to return to its original shape after being deformed is called its _____.
ductility; elasticity
62
Which of he following magnetic materials is an alloy?
Alnico
63
A solid and a liquid can exist together at the ____. Adding heat melts more of the solid _____ changing the temperature.
melting point; without
64
An alloy containing iron as the base metal is
steel
65
Machinability is the speed and ease with which a metal
can be cut on a machine tool
66
The maximum amount of stress a material can exert is called its
yield strength
67
A standard tensile test specimen exerts a resistance force of 8500 lb. What is the stress in the specimen?
42,000 psi
68
When a metal supports a heavy load at high temperature, it may undergo
creep
69
The mass of material per unit volume is called its
density
70
The ration of a material's density to the density of water is called its
specific gravity
71
Permanent-mold casting uses
both metal cores and sand cores
72
The method of casting metal parts by using a spinning mold to force the molten metal away from the center and against the sides of the mold is called _____ casting.
centrifugal
73
Die casting is the _____ of all casting methods. It is used to cast ____ metals.
fastest; nonferrous
74
Upsetting is the most common method of
cold forging
75
Pulling rod stock through a tapered die produces
wire
76
Because of its higher carbon content, _____ has a lower melting point than ____.
cast iron;steel
77
Carbon in cast iron generally makes the metal easier to
break
78
Malleable cast iron is _____ than white cast iron and has ____ resistance to wear than gray cast iron.
softer; more
79
What kind of cast iron is best for parts that must be hard ans strong but not brittle?
high-alloy
80
Open-hearth, basic oxygen, and electric are three types of furnaces used for making
steel
81
The most important element added to iron in making steel is
carbon
82
AISI and SAE are number coding systems that specify the ___ of each kind of ____.
chemical composition;steel
83
When spark testing to identify steel, you should consider spark length, ____, and _____.
color; burst
84
The cold-rolled sheet steel graded _____ quality has a matte finish that holds paint well.
commercial
85
All stainless steel contains
chromium
86
Uneven heating and cooling of metal parts during welding causes
distortion
87
In annealing, a metal should be heated to a temperature above its critical temperature, and then
cooled slowly
88
Before welding a broken gear, you should ____ it in order to avoid distortion
preheat
89
Steels that are _____ generally have a _____ carbon content.
forged;low
90
High-carbon steel contains ____ percent carbon.
0.55 to 1.00
91
Copper alloys are made harder by
cold-working
92
Copper alloys that contain lead are relatively _____ to ______.
easy; machine
93
What copper alloy contains 36 to 50% zinc?
beta brass
94
Muntz metal is the strongest
brass
95
What copper alloy is most widely used for casting
ounce metal
96
When aluminum is exposed to the air, a layer of _____ forms on the surface.
oxide
97
In the four-digit aluminum designation number, 6053, which digit signifies the main alloying element?
6
98
The process of rolling a thin layer of aluminum onto a base metal is called
cladding
99
What causes aluminum to lose its strength during welding?
increased tempertaure
100
Intermediate-temperature solders melt and flow at temperatures of ____ to ____°F.
500;700
101
The two methods of extracting magnesium from brines and ores are _____ and _____.
electrolysis; reduction
102
Which magnesium casting alloys have the lowest yield strength at high temperatures?
AZ
103
The letter "a" following the designation for a rolled sheet of magnesium stands for
annealed
104
Magnesium parts should be gas welded
only in emergencies
105
Typical melting and casting methods cannot be used for _____. It can be arc melted using _____ gas.
titanium; argon
106
Lead and tin are alloyed in various proportions to make
solder
107
Lead wool can be used to
form cold-welded seals
108
Which nickel alloy is commonly used for making the heating elements in toasters?
Nichrome
109
Galvanizing is the process of coating sheet steel with
zinc
110
Which of the following should you use as a lubricant when matching zinc?
Lard oil
111
A liquid has a
fixed volume and changeable shape
112
Kilograms per cubic meter (kg/m³) is the metric measurement of
density
113
The temperature of a liquid decreases during
evaporation
114
A volatile liquid
has a low boiling point
115
The solubility of a gas in a liquid at the liquid's boiling point is usually
zero
116
The terms thermoplastic and thermoset refer to
plastic classifications
117
Performance is the most important factor in choosing
any plastic material
118
When repairing a filament-wound tank, which of the following should be applied to the inside surface?
patch
119
When drilling most plastics, you should reduce the feed rate just before the drill point
penetrates the other side of the material
120
when preparing an area to be patched, which side of the material should be cleaned?
both sides
121
When elastomers are stretched, they
regain most of their original shape immediately
122
Which of the following is/are added to rubber to reduce deterioration caused by oxidation?
Antioxidants
123
Class T rubber compounds resist damage by
temperature extremes
124
In vulcanization, the amount of sulfur used determines the
hardness of the rubber
125
Flexibility is more important in rubber coatings for
cables and wires
126
A radial cut is produced by cutting a log
lengthwise through or near the centerline
127
The actual length of a board is stated in
running feet
128
The best veneer in soft plywood is graded
N
129
Wood with many knots should not be used because it is
weak
130
Pilot holes should be drilled to a depth of half the length of the screw in
softwood
131
Air-entrained concrete is commonly used in
structures exposed to severe cold
132
Cinder block is commonly used for construction
above ground
133
Type N mortar is
a medium-strong mortar
134
Special plasters
are described by all of the above
135
You should measure the window sash and deduct 1/16 - 1/8 in. to determine
the correct glass size for a window pane
136
Insulation made from which of the following products can burn is used in areas having high temperatures?
Vegetable products
137
When installing blanket insulation
use the proper cutting tools
138
Lead sheet is used for
wrapping rattling pipes
139
An asphalt coating serves as an insulation adhesive
above ground
140
Fire prevention includes using
all of the above
141
By selecting a protective coating that is similar to the previous one, you will
reduce future maintenance
142
Surface preparation is the single most important factor for success in applying
a protective coating
143
White blasting a surface produces the
best anchor pattern
144
The color green is used to indicate
safety devices
145
Fire protection material are carried in pipes painted
red
146
On a pH scale, acidity is indicated by
numbers below 7
147
Dry-cleaning solvent is
the safest industrial cleaning solvent
148
Synthetic lubricants are resistant to heat and fire
at high temperatures
149
Cyanide is the most dangerous chemical
used in electroplating
150
You should always use grounding devices
to avoid fuel fires
151
Curing is the
completion of all chemical and physical processes that affect bonding
152
Water-soluble gums and starches are made into
mucilage
153
Which of the following adhesive joints provides greater surface area?
Bevel-lap joint
154
Rubber tape is an
excellent insulator of electricity
155
Tapes coated with fluorocarbon are used where service conditions include
high temperatures
156
Carbon is chemically inert at
room temperatures
157
Which part of an electric too carries electricity to and from the rotating armature of the motor
Carbon brushes
158
Excessive noise in electric hand tools often indicates
carbon brush problems
159
Nonporous seals are used where
even a tiny leakage would be harmful
160
In joints having two individual packing rings, the joints should be positioned
180 degrees apart
161
What parts of a transformer generally contribute to temperature rise in the transformer?
Copper winding
162
In a given transformer, the voltage is reduced from the primary to the secondary. What is this transformer called?
Step-down transformer
163
What does quartz sand filler in a fuse provide?
Effective heat transfer
164
Why is the inverse time characteristic of a fuse important?
It parallels he characteristics of conductors, motors, transformers, and other electrical apparatus.
165
Why is the low-voltage bulb in the pilot light preferred?
It will withstand vibration
166
What is the advantage of panel mounting a contact block?
This mounting provides space for terminal block installation.
167
What is one advantage to the plug-in relay?
Relays can be changed without disturbing the circuit wiring.
168
Coils on relays are designed not to drop out (deenergize) until the voltage drops to what percent of the rated voltage?
85%
169
What is the solenoid current in amperes with the plunger in the closed position?
Sealed or holding current
170
Which of the following statements is true of the spring when a solenoid is energized in a single solenoid, spring return valve?
It is depressed (loaded)
171
Which of the following are methods used to achieve the operation of proximity limit switches?
Capacitive fields
172
Which of the following determine the speed of response for the proximity limit switch using an oscillator in the output circuit?
The oscillator frequency
173
The flow monitor operates on what principle?
Thermal conductivity
174
Which of the following can a pressure transducer use to transfer pressure information?
Semiconductor strain gauges
175
How is the differential resistance in a pressure transducer measured?
By applying a constant voltage to the bridge and deflection of the diaphragm
176
What is the approximate millivolt output of a type J thermocouple at 500F
15
177
On what principle does the bimetal type of temperature switch operate?
Uneven expansion of two different metals when heated
178
What accuracy can be expected in modern solid-state timer-counters?
100%
179
Under what condition does the stepping motor advance one step?
Each time the motor is de-energized
180
What special protection is provided in the solid-state reduced-voltage starter to prevent a high-temperature condition due to overcurrent?
Current meter
