Final Flashcards
(204 cards)
1
Q
A metals ability to be stretched is called
A
Ductility
2
Q
The ability of a metal to return to its original shape after being deformed is called
A
Elasticity
3
Q
Which of the following magnetic materials is an alloy?
A
AlNico is an alloy of aluminum nickel in cobalt 
4
Q
A solid in a liquid can exist together at the
A
Melting point
5
Q
In alloy containing iron is the base metal is
A
Steel
6
Q
The speed in ease with which a metal can be cut on a machine tool is called
A
Machinability
7
Q
The maximum amount of stress a material can exert is called its
A
Yield strength
8
Q
The formula used in calculating tensile stress is
A
TS equals F over a
9
Q
When a material supports a heavy load at a high temperature, it may undergo
A
Creep
10
Q
Density equals
A
Mass over volume
11
Q
Specific gravity is the ratio of
A
Density of material to density of water
12
Q
Permanent mold, casting uses
A
Both metal cores and sand cores
13
Q
The method of casting metal parts using a spinning mold to force the molten metal away is
A
Centrifugal casting
14
Q
Diecasting is the most fastest of all casting method. It is used in casting.
A
Non-ferrous metals or metals that have no iron.
15
Q
Upsetting is the most common method of
A
Cold forging
16
Q
Pulling rod stock through a taper dye forms
A
Wire
17
Q
Cast-iron has a lower melting point than steel because of
A
The higher carbon content
18
Q
Carbon and cast-iron generally makes the metal easier to
A
Cast 
19
Q
Malleabilized iron is______ then white cast-iron, but it has_______ resistance to wear than grey iron
A
Softer, better
20
Q
Furnaces that include the open hearth, the basic oxygen, and the electric furnace are used for
A
Steel making
21
Q
When making steel, the most important element to be added to iron is
A
Carbon
22
Q
In both a ISI and the SAE coding systems each code number that specifies the________ of each kind of steel
A
Chemical composition
23
Q
When spark testing to identify the steel, the amount of length and______, ______ of the Sparks will help you identify
A
Color of the sparks and burst
24
Q
The cold rolled sheet steel graded that has a matte finish that holds paint well is
A
Commercial quality
25
All stainless steel’s contains at least 12% ______to be called stainless steel
12% of chromium by weight
26
by welding, a broken gear, you must _____ bye, avoiding distortion 
Preheat
27
Steals that are forged generally have
Low carbon content
28
High carbon steel contain____ to______ carbon
.55 to 1.00%
29
This makes the copper alloys even harder and stronger
Cold working
30
A copper alloy containing a little lead is much
Easier to machine
31
When a copper alloy contains 36 to 50% zinc, it is referred to as
Beta brass
32
Muntz metal is the strongest of
The brasses
33
The copper alloy most why do we use for casting is called
Ounce metal
34
The coding that forms rapidly on its aluminum surface when the metal is exposed to air
Aluminum oxide
35
The aluminum association, four digit numbering system to describe aluminums. The first digit indicates the main alloying element.
In the number 6053 the six represents the main Ahlering element
36
The thin layers of aluminum can be rolled onto a base metal. This process is called.
Cladding
37
What causes aluminum to lose its strength when welding
Temperature
38
Intermediate temperature solders melt at temperatures of
500 to 700°F
39
Magnesium is extracted from Bri’s and orders by two methods
Electrolysis in reduction
40
The letter a following the alloy designation indicates for a 
Rolled sheet of magnesium
41
Magnesium casting alloy has lowest yield at high temperatures
AZ
42
Gas welding on magnesium should be used only for
Emergency repairs and special applications
43
The usual melting in casting methods using arc melting process with argon cannot be used for
Titanium
44
Heating elements used in toasters are often made from______ wire or ribbon
Nichrome
45
Lead in tin or alloy in various proportions to make
Babbitt
46
The proper lubrications to use when machining zinc include
Lard oil and kerosene
47
The process used to Coach sheet steel with zinc is called
Galvanizing
48
Lead wool can be used instead of molten lead to
Form a cold welded seal
49
A liquid has a changeable_______ and a fixed______
A changeable shape, and a fixed volume
50
The unit of metric measurement for liquid is
Density
51
The temperature of a liquid decreases as it
Evaporates
52
During laminar flow, the fluid in the pipe moves
In layers, parallel to the pipe
53
The solubility of gases in liquids is usually______ at the boiling point of the liquid
Lowest
54
Plastics that can be reheated and reshaped many times are called
Thermoplastics
55
What method of molding produces intricate parts?
Injection molding
56
Filament winding is wound around a special form called
A mandrel
57
When drilling most plastics to avoid shipping and cracking reduce the feed rate just before the drill point penetrates
The far side of the material
58
For patching corroded surfaces on plastics, which side of the material should be cleaned
Both side
59
If elastomers are stretched to at least twice their original length, they will
Return rapidly to their original shape
60
The properties of rubber class T resist damaged by
Extreme temperatures
61
Most rubber compounds
Are flammable
62
What characteristics is most important in the rubber coatings for certain wires and cables
Flexibility
63
This type of lumber cut is lengthwise through or near its centerline produces a
Radial cut
64
The actual length of a wooden board is stated in
Running feet
65
The best veneer in soft wood plywood is graded
n for natural finish
66
Wood with many knots should not be used for structural support because it is
Weak
67
How deep should the pilot hole in wood for a screw to be drilled in soft wood Be?
Half as deep as the length of the screw
68
Air and trained concrete is commonly used for building
Structures exposed to severe cold
69
Cinder blocks in construction is used for
Above ground
70
Type in mortar is_____ Strength ______ Bearing mortar used for clay tile construction
Medium, load
71
Which type of plaster sets very quickly, so it can be used only for small patching jobs
Plaster of Paris
72
To determine the correct glass size for a window pane, measure the sash and
Deduct 1/16 to 1/8 of an inch
73
Convection heat is the
Transfer of heat by fluids
74
What type of insulation can withstand both high and low temperatures is chemically inert, and it uses ovens freezers refrigerator refrigerators
Mineral wool
75
You can use lead sheet or plastic film containing wood powder for
To reduce vibration of pipes and ducts
76
An asphalt coding serves as a________ on the outside of underground or basement walls
Moisture barrier
77
Which of the following materials has the highest dielectric strength?
Mikah with a dielectric strength of 1580
78
The liquid part of paint that binds solid particles into uniform film is called
The vehicle
79
The single, most important factor for success in applying a protective coating is
Surface preparation 
80
In sandblasting, the intensities that produce the best anchor pattern for paint is
White blasting
81
The color specified by a NS I to indicate first aid stations and safety equipment in the plant is
Safety Green
82
In________ an oxy acetylene flame melts the zinc and sprays it onto the metal surface for protection is called
Metallizing
83
For chemical safety numbers below____ indicate acidity
Five
84
The solvent should never be used for cleaning is highway flammable and can also irritate skin
Gasoline
85
You should use_____ for removing hard water deposits in heating and cooling systems
SulfaMic acid
86
In adhesive terms, this Is the completion of all chemical and physical reactions that affect bonding
Curing
87
An adhesive made of water, soluble gums, and starches is called
Mucilage
88
This is the strongest adhesive joint
A bevel lap joint
89
This type of special tape is coded with fluorocarbon or silicone adhesive in are used service conditions________
High temperature tapes, high temperatures
90
Activated carbon charcoal is why do we used for
Absorbing impurities from gases
91
At room temperature carbon is chemically
InnerT
92
Excessive noisy operations in hand tools often indicates
Carbon brush problems
93
Non-porous seals are used in applications where
Even a tiny leak would be harmful
94
The joints of individual rings of packing material should be positioned______ Part when installing______
180°, two rings
95
Iron parts are usually made from
Castings
96
What do the last two digits of the SAE steel code indicate?
Percentage of carbon
97
The ability of steel to resist cutting and scratching is called
Hardness
98
The process that eliminates brittleness in a steel is
Tempering
99
To remove cast-iron chip safely from a machine, you should use a
Brush
100
What tool should you use to layout and measure distances?
Dividers
101
To prevent cast-iron surface plates from resting coat the lightly with
Oil
102
To raise a surface gauge for measuring above its height, support it on a
Box parallels
103
The distance between the centers of two adjacent holes on a bolt circle is the
Cord or pitch cord
104
You should carry pointed tools in a tote box or in a
Pouch fastened to your belt
105
The part of the lathe that holds the dead center is called the
Tailstock
106
To remove a live center from a lathe, you should tap it with a
Knockout bar
107
For boring operations, on a lathe, you should hold the work piece in a
Chuck
108
What should you use to remove a check that screws on a lathe spindle?
Block of wood
109
To mount a workpiece on a machine table, you should hold it in a
Vise
110
A view showing a portion of a part cut away on a drawing is a
Section
111
Two dimensions of a cylinder are it_____ and it_____
Diameter and length
112
A name for the degree in accuracy needed for a part to function properly
Precision
113
The index line of a micrometer is divided by 40 parts per inch. each turn of the micrometer symbol moves the spindle ?
.025 inches
114
What does a tool maker use to check the accuracy of the gauges?
Gauge blocks
115
When you grind the end of a high-speed steel tool , the steel
Gives off dark red sparks
116
The surface of the tool shank that supports the cutting tip is the
Base
117
The proper surface of a wheel to use for grinding high-speed steel tools is the
Face
118
What does the a represent in a grinding wheel code marked, a 60 N 10 VW
A type of abrasive grinding wheel
119
The process of cleaning up an uneven edge formed by grinding is called
Honing
120
The metal column that separates the flutes of a twist drill is called the
Web
121
Most general purpose twist drills have an included angle at the point of
118° 
122
A flaring cup grinding wheel produces a relief that is
Flat relief
123
Machine counter sinks, have an included angle of two degrees
60 to 80°
124
To remove burrs in a machine spindle, you should use a what type Reamer
A tapered reamer
125
When you turn a work piece in a lathe, the carriage is connected to the
Feed rod
126
The two dimensions that describe lathe capacity are the center distance and the
Swing
127
By what means can you hold a workpiece for turning facing drilling and boring?
You can hold it in a truck
128
The inside surface of what type of Chuck is shaped to fit the stock it holds
A collet Chuck
129
The purpose of a steady rest or center rest is to
Support the end of a very long work piece
130
You can mount eccentric or a regularly shaped work pieces in a chuck or
Face plate
131
The device that moves with a cutting tool to keep long work pieces straight is the_______ rest
Follower rest
132
What is the suggested speed for finish cutting mild steel?
125SFPM
133
The smoothness of a finishing operation depends_____ And on the______
Tool sharpness, and on the feed rate
134
The process of giving a drilled hole a fine finish with a single point tool is
Reaming
135
The principal parts of a twist drill are the body, the shank, and the
Point
136
Which of the following materials has the highest drilling speed in SFPM
Wood
137
To change the speed in surface feet per minute to inches per minute you must
Divide by 12
138
On a vertical turret lay or boring machine_______ advances the boring tool into the work
And overhead ram
139
When you need a very accurate hole, what is the best method to use?
Hand reaming
140
The metal between the flutes of a reamer is called
The lands
141
You can remove birds on the cutting edges or teeth of dreamers with an
Oilstone
142
A counter sink cuts, tapered enlargement of hole openings to accommodate
Screw heads
143
The most common form of precision threads for moderate power transmission needs is the
ACME thread
144
Cold, forming or fruitless taps are used to tap what kind of material
Ductile materials
145
In a dry seal, the tiny tunnel between the pipe and the fitting is filled with
Flathead metal
146
An ideal tap for most tapping operations is the_______ tap
Spiral point or gun tap
147
To break a long chip in a tapping operation you should________ half a turn
Reverse the tap
148
In oxy fuel welding, you can control the rate of Heat input into the base metal by
Controlling the speed with which the torch is moved
149
In torch braising, the filler metal is distributed in the joint as a result of
Capillary action 
150
The purpose of using flux in oxy fuel, welding and braising is to
Clean the base metal
151
The purpose of post heating is to
Reduce stress stresses in the welded structure
152
When you weld low carbon steel, you should
Melt the end of the filler rod by dipping it in the weld puddle
153
When welding aluminum, you need to remember that aluminum
Conducts heat away from the weld site rapidly
154
In preparing aluminum parts for welding, you should______ the surfaces
Scrape or file
155
When welding brass, you should use a
Flux
156
What type of flame should be used when welding lead ,nickel, magnesium
A neutral flame for lead poppy no, she caught it catching it. Good job good dinner. 
157
To make the best possible welds using oxy fuel equipment you should
Know what metals you are joining
158
Oxygen fuel, welding and oxygen cutting are alike in that both processes
Require lighting the torch
159
Which of the following must be worn during an oxygen cutting operation?
Welding goggles with a suitable shade of darkened lenses
160
When piercing a steel plate with an oxygen cutting torch, which steps should be performed first
Heat the spot to a bright red
161
The purpose of scarfing is to
Remove surface defects from finished steel
162
If you need to cut a metal other than mild steel or medium carbon steel, you might make a difficult job easier if you
Lay a bead of low carbon steel along the cut line
163
The oxy fuel process in which the base metal is not welded, and the filler metal is drawn in by a thin joint by capillary action is called
Brazing
164
The purpose of using a flux in brazing is to
Eliminate oxide from the metal surface
165
A special concern when braising is that the filler metal melts at a temperature very near the melting point?
The base metal
166
Soldering differs from braising in the soldering
Occurs at lower temperatures
167
What is the purpose of hard face welding?______ what is the purpose of thermal spraying?
Rebuild worn areas, apply a surface coating
168
In torch, hard facing, the new material melts______ the surface in flames spray the new material melts______ the surface
Before it reaches, before it reaches
169
Which of the following is a common surfacing material?
Ceramics
170
When using thermal spraying for shaft repair, which steps should be performed first
Machine the damaged area on the shaft
171
I protection with electric arc spring applications require lens shade numbers of
From 9 to 12
172
In welding, a filler rod is used to
Supply filler metal to a joint
173
In which welding process does the electrode produce a shielding gas as it’s consumed?
SMAW or shielded metal arc welding
174
Resistance welding is typically used to join metals_____ in thick
Less than 1/4 inches
175
A weld with a triangular cross-section that joins two surfaces at right angles is called a______ Weld 
Fillet weld
176
Which type of fillet weld is towed to attach a smaller piece of metal such as a handle to a larger one
The boxing fillet
177
These welds are used primarily to fill holes rather than join metals
Slot welds
178
Joint alignment, spacing and edge preparation together are called joint______
Fit up
179
Good housekeeping in the area where you are going to weld includes
Moving hoses or cables out of the way
180
To avoid the risk of fire explosion when you are welding or cutting, you should
Remove combustibles from the area
181
When welding you should wear gloves made of
Leather or canvas
182
Keep cylinder valves, especially on oxygen cylinders
Clean and free of grease
183
You should have a qualified technician, examine a regulator and repair it if the
Regulator still leaks after reason, reasonable tightening
184
Which precaution should you take when welding in a damp area?
Stand on a rubber mat
185
Which of the following is part of an oxy fuel welding outfit?
A torch
186
What is the max safe working pressure for a settling
15 psi is the max safe working pressure
187
Which of the following items of clothing protects you from flying sparks and metal spatters during welding
Boots or high cut shoes
188
When preparing for oxy fuel welding, which of the following steps should you perform first?
Crack the cylinder valves to blow out any dirt
189
High carbon rising flame is used only for welding
White (brittle)cast-iron
190
Oxy acetylene torch backfire is caused by
Touching the tip to the work
191
The cylinder valves on the oxygen tanks should be
Free of grease or oil
192
To shut down an oxy fuel welding system first close the_______ on the_____
Oxygen, torch
193
The oxy fuel and arcwelding processes are similar in that
Both require joint preparation
194
A welding machine for average duty general service is rated in a range of about______ amps
250 to 350 A
195
Duty cycle ratings are based on
10 minute periods
196
When looking for a inexpensive welding method that does not require external power, you should choose
Oxy fuel welding
197
In a horizontal weld, the weld is done from the_____ of the work, in a flat weld it is done from_____ the work
Welded from above, welded from the side
198
The most difficult welding position is_____ and the most easiest welding position is______
Overhead, flat
199
Which sound indicates the proper arc length for the SMAW process
Distinct crackling sound
200
Setting the current to high on a welding machine can cause
Irregular weld beads
201
In manual SMAW work correct travel speed is indicated by an
Egg shaped puddle
202
Uneven expansion and contraction near a well joint can cause
Warping
203
Which welding motion reduces joint distortion in sheet metal thinner than 3/16 of an inch
A back step motion
204
Which of the following is a non-destructive test used in identification of metals
A magnetic reaction test
