Add Shit To This One Flashcards
(342 cards)
1
Q
How to determine the size of a lathe
A
Largest diameter of workpiece that can be supported over the ways
2
Q
Amount of taper on a taper pin
A
1/4 inch per foot
3
Q
What blade is used to cut thick steel
A
Course blade
4
Q
The _____ is the amount of metal removed by each tooth per revolution
A
Chip load
5
Q
What size of chain do you use a cotter pin to secure the link plates?
A
80 and above
6
Q
What is a screws lead
A
Lead is the same as pitch except in a multi start thread.
7
Q
Parts of a thread
A
Crest, root, flank, pitch
8
Q
Unified thread angle
A
60°
9
Q
What is zero mechanical state?
A
All energy sources made inoperative - electrical, pneumatic, hydraulic or gravitational
10
Q
What are the three components of the fire triangle?
A
Fuel, heat, oxygen
11
Q
What are the four classes of fire?
A
A (green triangle) - ordinary combustibles
B (red square) - flammable/combustible vapours
C (blue circle) - energized electrical equipment
D (yellow star) - combustible metals
12
Q
Where the thread thickness and space between threads are equal
A
Pitch diameter
13
Q
ACME thread angle
A
29*
14
Q
NPT taper angle
A
3/4” per foot
15
Q
Tap types
A
Taper, plug, bottoming
16
Q
OD of rod for a .5” thread
A
.495”
(a few thou smaller)
17
Q
Rule for identifying imperial fastener strength
A
Number of slashes plus 2
18
Q
For a metric screw the letter designating the allowance is upper or lower case
A
Lowercase
Example (h/H)
19
Q
Metric thread class is defined by #.# what is the rule for this format
A
(tensile strength).#(yield/percentage of tensile strength)
20
Q
process involves heating and cooling metals to alter their properties?
A
Heat treatment
21
Q
A mixture of two or more metals, or a metal and another element.
A
Alloy
22
Q
True or False: Alloys can have enhanced properties compared to their Base metals.
A
True
23
Q
What is the purpose of alloying elements?
A
To improve mechanical properties, corrosion resistance, or other characteristics.
24
Q
Fill in the blank: The process of shaping metal by hammering or pressing is known as __________.
A
forging
25
Which phase of steel is known for its hardness?
Cementite
26
the most agresive way to cool metal
water quenching
| Then Oil->Air
27
heat treatment to create pearlite (soffen the steel completly)
| Above upper Critical point
annealing
28
lacks iron as a alloying element
non-ferrous
29
Stainless steel is an alloy that contains what
chromium.
30
element witch increase hardness and strength in steel
carbon
31
can be stretched into a wire without breaking
ductile
32
Heating to a temperature below its lower critical temperature and then cooling it at a controlled rate
Tempering
33
Metals to avoid grinding or welding
Cobalt, Zinc, lead, Chromium
34
Point at wich carbon and iron are at equilibrium
eutectoid point .83%
35
Why is the pitch line located on the outside diameter of the sheave?
So that the widest cross-section of the belt carries the load.
36
What does creep mean in belt terminology?
It is described as a loss of driving speed due to lengthening and shortening of the belt as it cycles from the slack side to tight side.
37
Where should the gripping action on a V belt take place?
The gripping action should take place on the sides of the sheave groove in which it is wedged. The belt must not touch the bottom of the groove.
38
Do the belts use an alphabetical or numbered designation code?
Alphabetical (ABCDE)
39
Describe the code for the variable speed drive belt - 12|28|V|255
Top width (12/16” = 3/4)| groove angle (28°) | cross-section (V shape) | pitch length (25.5”)
40
Who standardizes the codes on most belts made in North America.
The rubber manufacturers association (RMA)
41
What is the maximum misalignment when using a string line to align sheaves?
1/16 per foot
42
You can use idler pulleys on reversing drives. T/F
False
43
How long can belts last in storage?
Eight years if stored accordingly to RMA
44
what is the purpose of tension members in a belt?
To carry the load.
45
What is a synchronous belt?
It is a belt that is used on drives that cannot tolerate slippage.
46
T/F synchronous belt drives can be used for lifting systems
False
47
What are the tensile members of a synchronous belt commonly made of?
Fibreglass chords or Armid fibre.
48
What is the minimum amount of angle and teeth being engaged on a synchronous belt?
A minimum of 60° angle and six teeth engaged.
49
Describe the synchronous belt code - 255 | L | 075
Pitch length (22.5”) | tooth pitch (L) | width (0.75” or 3/4”)
50
Is it necessary to have a sprocket with flanges when creating a sprocket driven belt system?
At least one sprocket must have flanges to guide the belt
51
Describe the code for the Sheave - QD | 4 / 3V | 6.00
Hub QD style | number of grooves (4) / cross-section (3V) | nominal diameter (6.00”)
52
What are two procedures for checking vertical angular misalignment in belts/pullys?
Putting a level to each pulley or doing the string test.
53
54
What are pullers used to remove
Hubs, bearings, sprockets and couplings
55
Four general types of pullers
Pressure screw puller
Hydraulic puller
Slide hammer
Bar style
56
Name two hydraulic jacks
Ports power (has a seperate pump)
Bottle jack
57
Two types of cleaning process
Chemical and mechanical
58
What is the approximate amount of material removed from lapping
0.0005
59
What does most of the cutting on a tap
Taper or chamfer
60
Name what all of the numbers and letters mean
1/2-13-UNC 2B
1/2 - nominal size
13 - TPI
UNC - unified course
2 - class of thread
B - internal thread (A - external thread)
61
What are the 3 taps in a set of hand taps
Taper
Plug
Bottoming
62
What are serial taps used for
Difficult to tap materials
63
A tap drilled hole always leaves what percent of full thread in the hole
75%
64
How much material does each tooth take on broaching
0.003 inch
65
Two pros of barrel finishing
Inexpensive
Many parts at once
66
A saw blade with 14 teeth in 1 inch would be classed how?
14 pitch blade
67
What is the General shop used saw blade
18 pitch
68
A fine pitch blade is used for what material
Hard material
69
How many saw blade teeth should always be in contact when cutting
3
70
What term identifies the width of a cut
Kerf
71
How many strokes per minute when hacksawing
50
72
4 basic tooth styles of files
Single
Double
Rasp
Curved
73
curved tooth files are used for what material
Soft material
74
How do you produce a good surface finish when hand filing
Draw filing method ( hold file perpendicular to workpiece)
75
Two types of vises
Bench vise
Pipe vise
76
What is the peen used for in a ball peen hammer
Rivets
77
What is the included angle of a centre punch
90 degree
78
Included angle of prick punches
30-60 degree
79
3 commonly used screwdriver
Standard
Philips
Robertson
80
3 types of transfer measuring instruments
Calipers
Telescoping gauge
Small hole gage
81
On a pedestal grinder the gap between the wheel and the work rest should not exceed
1/8(3mm)
82
Most common general purpose wheel
Aluminum oxide
83
Where would you use telescoping gauges
Bores
Slots
Recesses
84
What is a blotter on a grinding wheel used for
Protect the flanges from abrasive grit from the wheel, display information on the wheel
85
What is an oil wedge?
Oil occupying clearance between a moving component & it’s surroundings by application of force
86
Flanges should be at least
1/3 the diameter of the wheel
87
Structure of hardened steel
Martensite
88
Best wheel for cleaning scale and dirt off a workpiece?
Wire wheel
89
What is boundary lubrication?
When a film of oil fails for a short time - lack of oil wedge
90
Three styles of small hole gauges
Twin ball
Hardened ball
Half ball
91
The _____ is part of the wheel that holds the grains together
The Bond
92
Markings for wheel identification can be found on the?
Blotter
93
%carbon for hardenable steel
At least .2% for some hardness .3% to be considered non mild steel
94
What is hydraulic lock?
Over lubrication of a threaded hole causing a hydraulic lock of pressure
95
What is the recommended speed to run a grinding wheel
Never run a grinding wheel faster than the speed recommended by the manufacturer of the wheel
96
What material are high helix drills used for and how do they accomplish it?
The high helix allows for material to be taken out easier and the flutes do not jam up
97
How should you start a grinder
Stand to the side on start up and wait 60 seconds
98
Position a work piece should be quenched in
In a way to limit warping ie. Long and thin peice vertically quenched
99
True or false: a dial indicator defines the difference in height or position of workpiece
True
100
Two most common abrasives
Aluminum oxide and silicone carbide
101
Is 46 or 60 the coarser grit
46
102
What is the ring test used for
To check for cracks
103
What are 2 types of lubrication system?
1. Once-through systems, i.e. wick feed, drip feed, oil feed, hand oiler
2. Enclosed systems, i.e. ring oiler, splash lubrication, oil bath
104
Properties of abrasives
Hardness, heat resistance, toughness, friability
105
How is the speed of power hacksaws expressed?
Surface feet per minute/ surface meters per minute
106
True or false: dial test indicators should be used for direct linear measurement
False - they should not be used
107
What are the different bond types and its letter?
V=vitrified
S=silicate
B=resinoid
R=Rubber
E=Shellac
108
For isometric drawings what angle should the drawing be oriented at on each side
30 degrees from horizontal
109
Hardness test using a Dimond or hardened steel penetrator
Rockwell hardness testing
110
Parts of the grinder
Inner and outer flange
Nut
Bushing
Blotter
Shaft
Grinding wheel
111
What are the three basic types of pictorial drawings
Perspective, oblique and isometric
112
True or false: you should load a dial indicator 1/8 to 1/4 of a dial revolution before zeroing
True
113
Common angles of drills
General purpose- 118
Harder materials- 150
Soft materials- between 60-90
114
What are two potential dial indicator errors
Spindle travel
Cosine error
115
When sketching a shaft in isometric, what is the shape of the front face of the shaft
Elipse
116
Which variable is most important when determining spindle speed
Diameter of the drill
117
Any machined surface on a drill press must be _____?
Clean and oiled
118
Cutting speed refers to?
Peripheral speed
119
True of false: the machine trades typically use perspective views on drawings
False, perspective views are not common in the machine trades
120
How fast should a 1/2 inch drill turn when drilling mild steel, if the CS is 90 SFPM?
720 RPM
121
What is elasto-hydrodynamic lubrication?
Ask Cole.
Film completely separates two surfaces - loaded to the extent that deformation occurs in the loaded area. For high speed/high pressure applications. Film is extremely thin- 1/4 to 3 microns thick.
122
3 types of dial indicators
Bottom plunger
Test indicator
Back plunger
123
Small drills require a higher feed per revolution than the larger ones, T or F?
False- small drills require less feed per revolution than larger drills
124
The 3 main categories for Rockwell hardness
A(extremely hard, use Dimond)
B(soft ie copper, use 1/16 ball)
C(in-between A and B use the needed penetrator)
125
If you receive a drawing that shows a bilateral tolerance of .007 inch what is the total tolerance of the part
.014 inch
126
Which abbreviation is used to express the feed rate on a drill press
IPR
127
True or false: a basic measurement is a measurement to within 1/128
False - it is 1/64
128
How is viscosity measured?
CST (Centistoke) or SUS (Saybolt Universal Seconds)
129
Strength of a specimen when under tension
Tensile strength
130
A drill press has a #2 Morse taper. A twist drill with a #3 Morse taper shank must be mounted in the spindle. How should you secure the drill in the spindle?
Use a drill socket
131
What is tolerance?
Allowable variation in size of a part from the basic size
132
To remove a tapered shank twist from the drill press spindle, use a:
Drill drift
133
How do you measure absolute viscosity?
Measured in centipoises - a direct measurement of the force of resistance of flow in a fluid
134
When using a sensitive drill press, what should you do as the drill breaks through the workpiece?
Ease up on the pressure
135
Do you know all the different sparks types for each metal
Probably not go look them up
136
What is the pour point?
The lowest temperature at which oil is observed to flow
137
The included point of angle of a counter sunk hole for most flathead screws is
82 Degrees
138
Which type of machine tap pushes the chip out ahead of the tap
Spiral point (gun tap)
139
Plate and bevel protractors measure angles up to within what degree
1 degree
140
The lip relief clearance angle on a drill should be?
8-12 degrees
141
The amount of change in the viscosity over temperature change is referred to as?
Viscosity index
142
Universal bevel protractors can discriminate to what
Five minutes (5’) of a degree
143
The hand drill is quicker and more versatile than any drill press for?
Drilling small non vertical holes
144
The ability to resist penetration
Hardness
145
Electric hand drills are limited by?
The amount of feed pressure (and RPM) that can apply to large diameter drills
146
The ease with Wich you can cut and shape a metal
Machinability
147
Two classifications of welding machines?
1. Constant current, i.e. SMAW, maintains set amperage but varies the voltage
2. Constant voltage, i.e. GMAW, maintains set voltage but varies in amperage
148
basic shapes for structural Steel
Standard beam
L bar
Chanel
T bar
Square and round tube
149
What is counter boring?
The process of enlarging the top of an existing hole to allow it to accept the head of a bolt or screw
150
3 types of precision calipers
Vernier calipers
Dial calipers
Electric digital caliper
151
What is countersinking?
Countersinking is the process of cutting a bevel at the top of the hole so can accept the head of a flat head screw.
152
3 types of hole transfer
Twist drill method
Transfer punch method
Transfer screw method
153
Why are parallels used in a drill press?
So you don’t drill into the table and lift up the work piece.
154
You should operate a heavy-duty roller chain at a higher capacity than the maximum capacity of a standard roller chain. True or false
False: the capacity is about the same
155
How does the life of a sintered bushing chain compare to the life of a standard roller chain?
Sintered bushing last 5 times a long as a standard roller chain
156
What type of chain offers the highest power capacity for its size?
Silent chain
157
What length of chain is required if the pitch is 1/2, the small sprocket has 20 teeth, the large sprocket has 40 teeth and the centre distance is 3 feet?
87 inches
158
Two types of links that are used to connect the ends of a chain
Connecting link (master)
Offset link
159
What is the pitch on a #80 chain?
1 inch
160
What type of chain is a #80-3
3 strand standard roller chain
161
Where is the pitch measured on a chain?
Between pin centres
162
In which direction should the closed and of the spring clip on a connecting link face?
In the direction of travel
163
Materials used in a blast furnace
Pig iron
Lime
Coke
Forced air
164
What does the spindle move every revolution on a imperial micrometer
0.025 inch
165
Should you use more tension on a vertical or angle drive than on a horizontal drive?
More tension
166
Should the slack of the span be on the top or on the bottom of a drive?
The bottom
167
Which sprockets should you use in abrasive environments?
Hardened tooth sprockets
168
What is the advantage of a type B sprocket?
It can be mounted closer to the support bearing
169
Why should you remove a set screw completely from a hub before you attempt to remove the hub?
Could be a second screw under the first one.
170
Two main types of couplings
Rigid and flexible
171
When you see a chain that is not meshing properly with a sprocket and is piling up on the sprocket, what problems might you have?
The chain or sprocket are worn
172
How does limits of size differ from tolerance
Limits of size shows max/min part size while tolerance just shows the amount of material that can be taken off/ left over
173
How do V-belts transmit power?
Gripping the sides of the sheave grooves
174
Categories of flexible coupling
Mechanical and Material
175
Two main reasons for using a belt drive instead of a chain drive
Cost
No lubrication is needed
176
T or F: The larger the drill means the higher the speed and lower the torque
False: Larger the drill, higher the torque and low speed
177
What is the purpose of tensile members in a belt?
To carry the load
178
When welding must be performed on machinery, protect the bearings by:
Placing the ground clamp as close as possible to the weld
179
In which application would you find a link belt
Places where it is difficult to install endless belts
180
If short arc is used, the bead is ______ and the penetration is ______
Bead is narrow, penetration is deep
181
Two safety precautions you should take before you begin any work on a belt drive?
Make sure it’s locked out
De-energized
182
Two main reasons for cleaning sheaves
To inspect cracks
For dynamic balance
183
Thickness gauges range from what to what thicknesses
0.0015 to 0.200
184
How to set a DC welding machine to reverse polarity?
Electrode to positive, work/ground to negative
185
Benefits of a rigid coupling
High torque and speed
186
What type of synchronous belt is used on a serpentine drive?
Twin toothed belt
187
Describe allowance
Intentional difference between mating parts at maximum material condition
188
Arc characteristics - voltage vs. amperage?
Voltage - causes current (amperage) to slow, starting/maintaining arc, puddle fluidity and flow
Amperage - causes electrode/metal to melt, determined by type/size of electrode
189
On which type of belt is alignment more critical? A V-belt or a synchronous belt?
Alignment is more critical on a synchronous belt
190
What are the three types of fits
Clearance, interference and transition
191
What requires more tension, V-belt or a synchronous belt?
V-Belt
192
Benefit of a flexible coupling
Compensate for some misalignment
193
You need a puller to remove a tapered adapter bushing. T or F?
False: you use a set screw to pull
194
You can install a QD bushing in a hub bored for a Taper-Lok bushing. T or F?
False: you can use a different taper.
195
What is the procedure for checking vertical angular misalignment?
Set a level against the face of each sheave.
196
A class 3B thread is what type of thread
3- close snug fit, precision tools
B- internal
197
What is a cylindrical plug gauge used for
Check diameter of bore
198
Which finisher is smoother/finer:
32 or 64
32 is a finer and smoother finish
199
Straight vs. reverse polarity?
Straight - electrode negative. Burns hotter, welds faster, penetration is shallow.
Reverse - electrode positive. Slower welding speeds, narrow metal flow, penetration deeper.
200
True or false: the GO end of the gauge should not fit into the bore
False - it definitely should with out being forced
201
Plain ring gauge is used to check what
Diameter of shaft
202
Which way do u turn a taper plug gauge to get it out
Counter clockwise for one quarter turn
203
How to set amperage for SMAW?
Convert electrode core wire diameter to thousands of an inch & use to set amperage
204
How is a NO-GO gauge easily identified
An annular ring in the knurled surface
205
Where is the revision table commonly found in a technical drawing
Close to the title block, bottom right hand corner
206
IN GMAW, the electric arc is produced between?
The shielding gas and the base material
207
What is the best chain coupling for high speed and torque application
Silent chain (up to 5000 rpm)
208
Two common sine bar lengths
5 and 10 inch
209
Where is senthetic chain coupling most used
Food processing
Corrosive conditions
210
Coupling for reducing shock and vibration with excellent torsional flexibility
Rubber tire coupling
211
If a drawing has the symbol “TYP” next to a dimension what does it refer to
The dimension is “typical” and occurs multiple times on the part
212
Define cutting speed
A point on the workpiece moves past the cutting tool
213
Types of coupling misalignment
Angular
Offset
Combination
214
What is plasma?
Gas heated to extremely high temps (10 000 to 14 000 degrees C) by electric arc- gas ionizes making it electrically conductive. Plasma is the fourth state of matter.
215
is the driver or the driven Side of a coupling moved during alignment
Driver
216
What is the metric formula for spindle speed
Rpm= CS x 320/ Diameter
217
What is the meaning of each term:
FAO
MMC
A/F
FAO: finish all over😜
MMC: maximum metal condition
A/F: across flats
218
What are the 3 types of soft foot
Parallel
Heel
Toe
219
Imperial formula for spindle speed
Rpm= CS x 4/ Diameter
220
When a part is complex, what do draftspersons do to maintain correct interpretation of a drawing
A sectional view
221
What feed rate is used on a lathe for finishing
0.002 to 0.005
222
How are offset and aligned sectional views different
Offset view lines change direction at 90 degrees where aligned changes at any angle under 90 degrees
223
If a sectional view is placed in the middle of a part which type of sectional view is it
Revolved
224
A drawing line with two smaller lines perpendicular line on each end indicates what on a drawing
Symmetry
225
Types of arc cutting?
1. PAC (plasma)
2. SMAC (shielded metal)
3. CAC (carbon arc)
4. OAC (oxygen arc)
226
What angle must both ends of a universal joint be
The same angle
227
Approximately how much material should u leave for finishing on a lathe
0.030
228
Type of bearing used in universal joint
Needle
229
What does the abbreviation BHC mean in drawings
Bolt hole center
230
Should u part off a workpiece between centers
No don’t be stupid
231
If angles of a universal joint are unequal what is the result
There will be a variance in the speed of rotation
232
What is the draw limit on an acetylene cylinder?
Must not be emptied faster than 1/2 it's capacity per hour
233
When should a CV (constant velocity) joint be used over and universal joint
When the joint angle is un equal on each side
234
The symbol for a spot face on a drawing is what
Three lines that form a “cup” or “U” shape with the letters “SF” inside
235
What should u do when setting up a boring bar for lathe
Mount boring bar with minimal over hang to make rigid as possible
236
Thread cutting on a lathe is controlled by
The lead screw
237
The three types of thread representation are
Simplified
Schematic and
Pictorial
238
three tooth patterns for cutting compliant material? (Hint: think bread knife)
Wavy, scalloped, straight
239
Finish on a thread can be enhanced how
Using cutting oil
240
What is the benefit of a centrifugal shoe coupling
Allows the prim mover to reach partial speed before the load is fully engaged
241
What is the rpm of u have a 1.5 inch diameter of mild steel with a sfpm of 700
1866.7 rpm
242
How does the speed and feed of a reamer compare to a drill
Rpm slower and feed faster
243
To achieve a good kneel u should what
Flood the workpiece with coolant
244
Should a gap exists between the halves of a split coupling
Yes
245
The weight of a lathe refers to what
Rigidity of the bed
246
What is backlash
Amount of slack between meshing gears
247
In drawings, tapers can be dimensioned in these ways:
Difference between large and small diam
Length of taper
Taper per foot
Taper per inch
Taper ratio and
Included or centerline angle
248
What is the carriage on a lathe made up of
Saddle
Cross slide
Compound rest
Apron
249
Four common types of lathes centers
Live center
Solid dead center
Half center
revolving dead centre
250
If a part actual size is 9-1/4 inch and the scale of the drawing is 1:8 what is the scaled drawing dimension
15/32
251
Do you want to use fine teeth on your saw blades for soft material?
No, a course tooth pattern will give the soft material somewhere to go so they do not plug up
252
True or false: four jaw chucks are very accurate
True
253
What is a indicator for miss alignment in a coupling
Excess heat, or where
254
When is it NOT necessary to specify the angle of a chamfer
When it is an external 45 degree chamfer
255
What is the free length of a spring
Length of spring when it is not under load
256
How many saw teeth need to be in contact with your work piece?
3
257
What do thread chasing dials tell you
When to close the split nut
258
When using wire for alignment what must be accounted for
Wire sag
259
Melting temp of fusible plugs on cylinders?
212 F or 100 C
260
What wire should be used for alignment
Piano wire
261
What are the two ways orthographic projection is displayed
First angle projection and
Third angle projection
262
What is the taper of a machine taper
3 1/2 inch per foot
263
How is first angle projection different from third angle
The adjacent/ projected views (top, bottom, left etc…) are reversed from third angle, top view is place below front, right view on left side
264
Why is it important to have multiple views on orthographic drawings
Multiple view capture details and shapes that may be missed in a single view
265
A compound rest may be rotated
360 degree
266
Can heavy vibrating machinery be installed directly onto an unsupported concrete floor
No a foundation is necessary
267
The apron hand wheel moves the carriage by means of
Rack and pinion
268
The symbol for third angle projection on a drawing has the taper on the … side of the front view
Right side
269
What does the headstock contain on lathe
The spindle
270
What are the two main types of grout
Cement based
Polymeric
271
The function of a regulator in oxyacetylene equipment is to?
Reduce cylinder pressure to working pressure
272
Benefits of polymeric grout
Non-shrinking
Can be applied at -10° c temperatures
Can we put into service less than 16 hours after placement
High compression strength
273
What are phantom lines used for on drawings
Shows a mating part, assembly or movement of an object
274
What does GFCI stand for in reference to power tools/ plugs
Ground Fault circuit interrupter
275
FCAW uses shielding gas generated from what?
The flux
276
True or false: cemented carbides are sharpened on aluminum oxide wheels
False
277
A leader line in a drawing terminates with a
An arrow, dot or squiggle
278
What anchor allows access to the bottom of the bolt
Boxed anchor Bolt
279
What is a microinch
0.000 001 inch
280
What is the taper of a tapered mandrel
0.006 to 0.008 inch
281
What properties does grout have
Incompressible
Does not grow or shrink when curing
High compressive strength
282
True or false:
Chris is a sensitive drill press
True
283
What is the length of a taper having a small diameter of 2 inches, a large diameter of 3 inches and a 3/8 inch taper per foot
32 inches
284
What is the large diameter of a taper having a length of 6 inches, small diameter of 2 inches and a 1 inch taper per foot
2.5 inches
285
What are the different types of milling machines?
universal horizontal milling, plain horizontal milling, knee and column milling, standard vertical, ram type vertical milling machine
286
What are the two fluted end mills good for?
They are good for plunge cutting as the cutting edges go to the middle, also good for softer material and heavy cuts as they can exit chips very well
287
What are three a four fluted end mills good for?
They can be used at higher feed rates but have less room for exiting chips so they can not take as heavy of a cut
288
Is the feed rate on fly cutters fast or slow?
It is slow due to there only being one cutting edge. They do some with more cutting inserts to allow for faster feeds
289
What are the different types of drill press's?
Sensitive drill press, up right drill press's, radial arm drill press's
290
What are the three most common included angles in drill bit tips
118 (all purpose) 150 (hard materials) 90 (soft material)
291
Who is the biggest liability in our class?
Fima
292
What are the three parts a twist drill are divided into?
Point, body and shank
293
What is peripheral speed?
It is the speed at which the outside diameter of the cutting tool is measured, The outside is spinning the fastest so that is where the RPM is measured from
294
NPT has what thread angle
60 degree
295
3/8-16UNC-2A is this internal or external thread
External
296
Classes 2A and 2B for thread classes are used for what
General application
297
What are the seven types of anchor bolts
Fixed
Grouted
Flexible
Boxed
Expansion bolt
Drop in
Adhesive
298
T or F: The maximum depth of an endmill is 1/2 the diameter
True
299
What offset types does a gear coupling enable
Considerable axial float and some angular and offset misalignment
300
301
What are some forces the ground may be subjected to when using a crane
Crane weight
Weight of load and rigging
Dynamic forces set up by the machine
Vibrations in moving the load
302
What is the purpose of using blocking on a crane
To increase the surface area that the outriggers touch the ground
303
When levelling a crane with outriggers, what must you ensure before levelling
You must ensure that all four wheels are off the ground
304
How are outriggers and stabilizers different
Outriggers are telescopic beams, stabilizers are hinged legs
305
In rigging what is reeving
Reeving refers to the way the cable is threaded through pulley blocks on a crane
306
What are the three ways EOT cranes can be operated
Cab operated
Pendant operated
Remote controlled
307
If you are about to perform work on a part of a broken machine what must you ensure before performing the work
De-energize and lockout
308
What can you do on a crawler mounted lattice boom crane to give the crane more stability
Extend tracks laterally to provide a wider stance
309
Precision layout with a vernier height gauge is accurate to
.001
310
What are the steel plates called that you put between pipe flanges
Blinds
311
What are two reason why gaskets move in place
Bolt load
Pressure internally
312
What constitutes the best seal on flange
Contact surface to contact surface
313
3 types of automatic packings
Cup
U cup
V cup
314
True or false: compression packing at times acts as a bearing
True
315
Is it safe to shim a ladder to make the base even?
Yes it is safe to shim the feet of a ladder
316
How many pounds are in a “long ton”
2240
317
If you are working on scaffolding that is 2 meters high with other workers below you, are toeboards necessary
Yes toeboards are always necessary when other workers are below you no matter the height
318
What does a thimble to for a wire rope sling eye
Make the eye stronger and reduces wear on the wire rope
319
What is the strongest synthetic fibre web sling
Nylon
320
True or false: o rings can be used in both static and dynamic applications
True
321
Should you avoid cross loading with a shackle
True
322
Name four secondary seal designs
O ring
V ring
U cup
PTFE wedge
323
324
What is the working load limit (WLL)
Working load limit (WLL) refers to the maximum load that can be safely applied to a straight length of chain
325
What is the chain safety factor
Comparison between a chains minimum ultimate load and working load limit
326
When must a chain sling be discarded
When wear exceeds 10 percent of the diameter of the link
327
What is the optimal angle for slings when rigging to distribute the load equally
90 degrees from horizontal
328
How is load capacity affected on lifting hooks
Centering of the hook on the saddle
329
Convert 3 5/8 to an improper fraction and simplify
15/8
330
7/16+5/8
17/16 or 1 1/16
331
Subtract 15/16 - 3/4
3/16
332
Convert 5.25 inches to millimetres (1 inch equals 25.4mm)
133.35 MM
333
A shout measures 0.8125 inches in diameter. Expressed this in a fraction of 1/64.
52/64
334
Round the number 3.7865 to the nearest thousandths.
3.787
335
Calculate the circumference of a shaft with a diameter of 2.25 inches. ( C=3.14*d) round to 2 decimal places.
7.07
336
A right triangle has a base of 6 inches and a height of 8 inches. What is the length of the hypotenuse? use Pythagorean theorem.
10
337
Find the angle in a right triangle if the opposite side is 4.2 CM and the adjacent side is 5.6 CM. Round to two decimal places.
36.87
338
If a part has a nominal diameter of 1 inch with a tolerance of a +/- 0.005 inches what is the maximum and minimum acceptable diameter?
0.995 and 1.005
339
A bolt circle has six circles equally spaced on a 5 inch diameter. What is the angle between each hole?
60°
340
A piece of flat bar is 4 feet long and you need to cut it into seven equal parts. What is the length of each part in centimeters? 1” = 2.54cm. Round to three decimal places.
17.417 CM
341
A milling machine table feeds at 2.5 in/min. how many seconds will it take to travel 18 inches?
432 seconds.
342
You are boring a hole with a feed rate of 0.010 inches per/rev and a spindle speed of 600 RPM. What is the feed rate in IPM?
Six IPM
