Volume 1 Flashcards
(305 cards)
1
Q
What must be present to produce fire?
A
Fuel, heat, oxygen
2
Q
Define flash point
A
The lowest temperature where combustible vapors will ignite is the flash point.
3
Q
Define ignition point
A
Ignition point is the minimum temperature where a combustible will continue to burn.
4
Q
What do you do if you store over 10 gallons of a flammable liquid?
A
Normally they are stored outside the building, in a cabinet painted yellow labeled “FLAMMABLE–KEEP FIRE AWAY”.
5
Q
How often do you empty dirty/oily rags?
A
Empty them at least once a daily, and move to a safe location outside the building for secheduled pickup.
6
Q
How to store clean rags?
A
In a separate container, marked “CLEAN RAGS ONLY”.
7
Q
Who’s job is saftey?
A
Everyone
8
Q
What is the saftey of sealded drums?
A
Don’t perform any cutting or welding on them.
9
Q
When welding what type of ventailation do you need?
A
postive airflow
10
Q
What metals do you need a particle mask for?
A
Beryllium, magnesium, titanium.
11
Q
What is the saftey AFI?
A
AFI 91-203
12
Q
Who are the MSDS posted for?
A
EVeryone
13
Q
Where should you wear double hearing proctection?
A
It is advisable to wear double hearing protection when you are operating equipment inside a hanger, shelter, or bunker.
14
Q
Where is the radar danger zone on aircraft?
A
The radar danger zone extends from the aircraft antenna in a radius of 50 feet and covers an arc of 100 degress.
15
Q
What is the first step to take when leaaving the cock pit or flight deck area?
A
inspet your tools and equimpent and make sure you have accounted for every tool and every hardware item before you leave the area.
16
Q
What is the purpose of maintance forms?
A
Maintance forms provide a permanent record of all maintance records.
17
Q
What form is used to docment any maintance action on an aircraft or other weapon system?
A
AFTO 781
18
Q
On the AFTO form 781 what does the signature consits of?
A
The first name initial, complete last name, grade, and employee number.
19
Q
On the AFTO form 781 what does the date contain?
A
The day and the month each use two digits and the year uses only one.
20
Q
How to upgrade a symbol on the AFTO Form 781?
A
Line through the name of the person who made the entry, and enter their own signature, grade, and employee number, above or beside the signature block.
21
Q
What to do if an erronous red symbol is entered in the forms?
A
Enter this statement in the corrective action block, “Symbol entered in error, Item reentered on page ____, item _____.”
22
Q
If a RED X is entered who may authorize or direct an aircraft to fly?
A
No one
23
Q
How many entries may be put under one RED X?
A
Each RED X symbol will always be a separte AFTO Form 781A entry.
24
Q
How many signatures does a RED X reguire?
A
TWO
25
How are RED DIAGONAL enterented?
The RED DIAGONAL extends from the upper righthand corner to the lower left hand corner of the block.
26
With the RED DIAGONAL where else must it be released?
The RED DIAGONAL must also be released in block 9 of the AFTO 781H.
27
What is the most common symbol entered in on the AFTO 781A?
The RED DIAGONAL
28
What to do if a RED DIAGONAL leads to a more in-dept maintanince action?
Enter a RED X in the next open symbol block. On the orignal RED DIAGONAL entry, make a reference to the RED X in the corrective action block, but don't close out the RED DIAGONAL until you're sure your original discrepancy has been corrected.
29
Where else must a RED DASH be released before it can fly?
A RED DASH symbol reqires a release in block 9 of AFTO Form 781H.
30
What to do when a new AFTO Form 781A is initiated?
Transfer any uncorrected discrepancies, other than RED X items, to the AFTO Form 781K.
If transfering to a new 781A enter the page number, item number, the date of the new form, and sign the TRANSFERED BY block.
When transfering to the 781K enter the date of the transfer and signs in the TRANSFERED BY block.
31
On the AFTO Form 781A, when transfering entries to a new form, what do you put on the symbol?
Nothing, this reprensents only transcribing action and does not correct the orignal reported condion.
32
What is the AFTO 781K?
This form keeps a record and tracks inspections due or inspections completed.
Delayed discrepancies may be transferred from AFTO From 781A.
Don't place RED X entries on the AFTO From 781K.
33
What is the AFTO 781H?
It shows the current status of the aircraft and serves as a ready reference to the servicing, maintenance, and inspection history.
34
What to do if a fiberglass hammer haddle cracks, and why?
Replace it. If the handle is split, it will continue to break until the head eventually falls off.
35
How do you tigten a lose hammer head?
try to replace the wedge, if that does not work replace the handle.
36
How to clean up the face of the hammer?
regrind it to clean it up.
37
What is the most common type of hammer in Metals Technology shops?
The ball peen hammer.
38
What are soft face hammers used for?
Soft face hammers are used to to strike heavy blows without marring the surface.
39
What are dead blow hammers filled with?
Lead shot to help increase the impact.
40
What is the included angle of a prick punch?
60
41
What is the included angle of a center punch?
90
42
When using a drive punch?
Use a series of light taps, instead of heavy blows. Heavy blows more often bend the punch intead of driving out the bolt.
43
What is the included angle of a chisel?
60 or 70
44
When do you grind a 70 degree cutting edge on a chisel?
For cutting hard materials like carbon steel.
45
When do you grind a 60 degree cutting edge on a chisel?
For cutting soft materials like aluinum.
46
Where do you hold piers and why?
Hold them tightly near the end of the handle to create more leverage.
47
When do you not use a pair of pliers?
When you can use a wrench.
48
What do hex-key or Allen wrenches come in?
1/32 to 1 inch.
49
How to lubricate an air drill?
Put a drop of oil in the air intake about once a week.
50
How to hold a handheld sander?
Hold it so the sanding disk forms an angle of approximately 15 degrees.
51
What happens if handheld sander is held at a wrong angle?
If the angle is too great it will gouge the work piece. if the angle isn't enough, the sander will be hard to control.
52
How much pressure do you apply for a handheld sander?
Apply just enough pressure to cause the disk to flattenslightly and use a stady back-and-forth motion.
53
What is the most common size of shop surface plates?
12 x 18 and 18 x 24.
54
What are the tolerance rage of surface plates?
0.00005 - 0.00025.
55
How to clean a cast iron surface plate?
Use dry-cleaning fluid with a clean cloth to remove any sticky flim, rust, or tarnish.
56
When not in use, how do you protect the surface of a cast iron surface plate.
First, apply a light oil flim over the entire surface, and then install a wooden cover.
57
How many gage blocks come in sets?
They come in sets of 5 to 103 in various thinknesses.
58
With gage blocks what are the dregees of accuracy?
The highest is grade AA, with an accuracy of 0.000002. Grade A is 0.000006 for blocks 1 inch or thinker and 0.000002 for ones that are less. Grade B are the common ones. These are common ones. They are known as working blocks. They are +0.000010 and -0.000006.
59
How do you wring gage blocks?
To wring gage blocks bring them lightly together in a circular motion. If wringing produces a smooth action, slide the top block halfway off the lower block, Apply light pressure, and then slide the block into full contact.
60
How deep can a depth micrometer measure?
The range of measurements for depth micrometers is 1 inch. Larger distances can be meaured with extension rods.
61
What is the range an inside micrometer?
0.500 inch, with the body being 1 1/2 inches. You can't messure holes smaller than 1 1/2 inches. Use extenstion rods for holes over 2 inches.
62
Describe an internal micrometer?
The internal micrometer uses a three-point measuring contact system to determice the size of a bore.
63
Describe an ball micrometer?
The ball micrometer has a rounded anvil and flat spindle. Use it to check the wall thickness of cylinders, sleeves, rings, and other parts that have a hole bored into them.
64
Describe an blade micrometer?
A blade micrometer has an anvil and spindle that are thin and flat. The spindle has a no rotating attachment that advances to contact the work without turning. This feature permits you to measure the depth of a narrow shoulder without having the blade roll off.
65
Who and when invented the vernier scale?
In 1631, Pierre Vernier, a French Mathematician.
66
After how much wear should you replace or repair a vernier caliper.
If the flatness or parallelism of the jaw's edges exceed approximately 0.0005 inches.
67
What is the accuracy of the bevel protractor?
The accuracy of the vernier bevel protractor is +/-1/12 degrees, or 5 minutes.
68
How fast do you run the spindle when using a coaxial dial indicator?
500 to 600 revoulutions per minute (RPM).
69
When useing a hacksaw blade when do you use a 14 pitch blade?
Use a 14 pitch blade on Al and Cu. The course pitch makes the sawing fast.
70
When useing a hacksaw blade when do you use a 18 pitch blade?
This one is recomened for general use. Use it on solid stock, cast brass (soft or hard), tool steel, high-speed steel, cast iron, and so forth.
71
When useing a hacksaw blade when do you use a 24 pitch blade?
Use it on tubing, channel iron, and sheet metal thicker than 0.047 inches.
72
When useing a hacksaw blade when do you use a 32 pitch blade?
use it on thin materials sheet metal thinner than 0.047 inches.
73
When useing a hacksaw blade when do you use a all-hard blade?
Use it on materials with a heavy cross section, brass, tool steel, cast iron.
74
When useing a hacksaw blade when do you use a flexible blade?
Use it when sawing hollow shapes and metals of light cross sections (tubing, tin, copper).
75
How do you use a hacksaw?
use pressure on the forward stroke and reduce pressure on the return stroke. Use a cutting speed of 40 to 50 strokes per minute.
76
How do you use a file?
For conventional filing, don't aply pressure on the back stroke. Don't exceed 30 to 40 strokes per minute.
77
Describe a mill file?
Mill files are used mainly for sharpening milling cutters and saw blades. These files taper slightly in thickness and width for approximately one-third of their length.
78
Describe a Half-round file?
Half-round files are used mainly to file concave surfaces. They are double-cut and tapered in width and thickness toward the point.
79
Describe a round file?
Round files are mainly used to file or enlarge circular openings, or to file concave surfaces.
80
Describe a square file?
Square files are used for filing keyways, slots, and corners, and for general use.
81
Describe a three-square file?
Three-square files are used for filing acute internal angles, clear out square corners, and repair damaged threads.
82
Describe a flat file?
Flat files are used for all common filling operations. These files taper slightly toward the point in width and thickness. They are double-cut on both sides and single-cut on both edges.
83
Describe a solid hand reamer?
The solid hand reamer is a general-purpose eamer for operations where a common fractional size is required. A straight-hand reamer is tapered at the start of the cutting edges for a distance equal to the diameter of the reamer.
84
How do you rough drill for a taper pin reamer?
The size of rough-drilled or bored hole should be approximaely 0.002 to 0.015 inch smaller then the reamer size.
85
On a liner reamer, what is the size of the pilot?
The dameter of the pilot is 0.005 inches smaller than the diameter of the reamer.
86
What material should not be broached?
Don't broach materials harder than Rockwell C35.
87
With tapping how big should the chamfer be?
After dilling the hole the chamfer should be equal to the major diameter.
88
What is a fraction?
A fraction is a number that shows how man equal parts of a number or whole are taken or used.
89
With a fraction, what is the denoinator?
The number that shows how many total parts there are in the whole. It is written below the line.
90
With a fraction, what is the Numerator?
The number that shows how many of the equal parts of the whole have been usedto leave a fraction reamaining. It is written above the line.
91
How do you reduce improper fractions?
Reduce improper fractions to whole or mixed numbers by dividing the numerator by the denominator and carrying any remaining fraction as a part of the whole.
92
How do you change a common fraction to a decimal?
Divide the numerator by the denominator.
93
What is an acute angle?
An angle that is less than 90 degrees.
94
What do the sum of the angles of a triangle add up to?
180
95
What is a terminal line?
The line ending an angle?
96
What is an intial line?
The line starting an angle?
97
What makes an angle positive or negative?
If the line rotates counterclockwise, it creates a postive angle. If the line rotates clockwise, it crates a negative angle.
98
What is the first step in using Vise Gribs or self-locking pliers?
Make sure the jaws are even by locking them together.
99
What is the drill size for a number 1 ezy-out?
5/64
100
What is the drill size for a number 2 ezy-out?
7/64
101
What is the drill size for a number 3 ezy-out?
5/32
102
What is the drill size for a number 4 ezy-out?
1/4
103
What is the drill size for a number 5 ezy-out?
17/64
104
What is the drill size for a number 6 ezy-out?
13/32
105
What is the drill size for a number 7 ezy-out?
17/32
106
What is the drill size for a number 8 ezy-out?
13/16
107
What is the drill size for a number 9 ezy-out?
1 1/16
108
What is the drill size for a number 10 ezy-out?
1 5/16
109
What is the drill size for a number 11 ezy-out?
1 9/16
110
What is the drill size for a number 12 ezy-out?
1 15/16
111
How do you insert an ezy-out in a hole?
Tap it only light enough to seat it.
112
What angle do you grind a screw punch to?
10 degrees
113
After puting a ground tool bit in a screw punch?
Tape all but the last 1/4 inch to keep the pieces from flying if the bit does break.
114
How do you use a screw punch?
To start, hold the screw punch at about a 10 to 15 degree angle in the direction of rotation. Tap it a couple of times. Next, angle the tool back to about 30 to 45 degrees. Use a series of light taps.
115
What drill bit do you select to drill out a screw to tap drill?
choose the final size to be one size under the tap drill size.
116
How do you remove a lock-ring inserts?
Drill into the lock-ring and the insert neck with a drill that cuts teh serrated teeth of both parts. Don't drill deaper than the counterbore. After this remove the insert with an extractor, then remove the lock-ring by lightly tapping ti on the side.
117
How deep should a rosan slimserts sit below the parent metal?
0.005 to 0.010.
118
Describe a heilcoil?
A Heli-Coil is a coiled thread insert made of 18-8 PH stainless steel wire and cold workd to tensile strength f 200,000 pounds per square inch (psi).
119
What type of bolt should never be used with Heli-Coils?
Never use stainless steel screws or bolts with stainless steel Heli-Coil inserts because the threads will seize.
120
When removing an Heli-Coil, where should the extrator tool be used?
Tap the extractor tool into the hole so that one side is a quarter turn from the end of the top insert coil.
121
How deep should a keenserts be seated?
0.005 to 0.010.
122
What are anti-friction bearings hardened to?
Rockwell "C" 60-63.
123
What do all bearings have?
All bearings have a procedure to retain them in or on their housing.
124
What can a staked bearing do?
Staked bearings can withstand rotational loads, but they cannot withstand thrust loads.
125
How many times can a part be roller staked?
It can be accomplished up to three times on steel and titanium housings which are heat treated to 175,000 psi.
For aluminum alloy houings, the only acceptale materials are 7075-T6 and 7075-T7, and once they are staked, they cannot be re-staked.
126
What do you use to roller stake a bearing?
A tool with shaped rollers is used in conjunction with a drill press or milling machine quill to roll the parent material over the chamfer of the bearing.
127
When roller swaging what speed to you set the spindle to?
Set the machine RPMs to 100.
128
Who is responsible for providing all personnel with a safe work environment?
Commanders.
129
How are unsafe and unhealthy working conditions eliminated or controlled?
Through engineering changes, administrative controls, revised procedures
130
Who is responsible for safety?
Everyone.
131
Who is responsible for good housekeeping in the shop?
Everyone in the shop/workcenter.
132
When is the best time to clean up a spilled substance?
Immediately
133
What is a flammable liquid?
A liquid that has a flash point less than 100 F
134
How might a cleaning solvent that is normally safe produce flammable vapors?
By being agitated in enclosed areas.
135
What measures should you take to prevent a fire from agitated combustible solvents?
Remove all sources of ignition and provide adequate ventilation.
136
Name five ignition sources that could cause accidental fires and explosions
(1) Smoking materials, (2) space heaters, (3) non-explosion-proof electrical equipment, (4) improperly fused electrical equipment and tools that produce sparks, and (5) static electricity.
137
What official may authorize you to store flammable or combustible liquids inside the shop?
The base fire marshal.
138
Describe the specifications for an oily rag container.
Self-closing metal container clearly marked, OILY WASTE ONLY.
139
Who conducts safety inspections in the Metals Technology shop?
Safety inspections are conducted at the Wing or Group Safety office level and spot inspections are conducted at the Squadron, Flight, and Element level
140
Why do we conduct safety inspections?
To catch and eliminate unsafe actions or conditions before someone gets hurt.
141
List five things to look for when conducting safety inspections.
(1) Are personnel using the proper PPE? (2) Is the PPE in good shape and functioning as required? (3) Are machine guards properly installed and being used? (4) Are welding in progress signs posted when welding operations are ongoing? (5) Are welding screens or curtains being used as required? (6) Are bottles securely chained and caps on tight in the flammable gas storage area? (7) Are flammable storage lockers grounded? (8) Do flammable storage lockers have self-closing/ locking doors? Are they functioning properly? (9) Are extension cords being used for permanent or long term use? (10) Are light switch/ outlet covers missing or cracked?
142
List the safety items that the Air Force furnishes to help protect you from workcenter hazards.
(1) Safety glasses. (2) Steel toe boots. (3) Gloves. (4) Gauntlets. (5) Welding jacket. (6) Apron. (7) Hearing protection. (8) Hard hat. (9) Particle/filter mask. (10) Welding helmet. (11) Welding goggles. (12) Face shield. (13) Coveralls.
143
What PPE item is required for all maintenance personnel?
Steel toe boots.
144
Before you begin any work, what should be your first action?
Remove all watches, rings, and jewelry.
145
Would you use your hands to remove chips from machinery? Why?
No. to prevent cuts.
146
What items do you look for during an inspection prior to operating a machine?
Check the machine forms, check the guards, and look for the shutoff, items, or obstructions that could prevent machine operation.
147
What should you check before you begin a welding operation?
Check the machine forms; check to be sure the machine ground is grounded.
148
If you’re welding in a confined space, what is an important safety action to take?
Make sure the area is vented properly
149
What is the minimum amount of protective equipment you should use while grinding hazardous materials?
Safety glasses, a face shield, and a particle mask or filter mask.
150
If you need information about a particular material in the shop, where would you look?
The Material Safety Data Sheet.
151
List some common hazardous materials you’ll use in the shop.
Welding rods, chemicals, coolants, metals, and solvents.
152
Who is responsible for keeping MSDSs current and for updating the MSDS list in the hazardous materials pharmacy?
The shop MSDS monitor.
153
What dangers do aircraft engines pose?
Intake and thrust, whether from jet or propeller aircraft, can turn objects into missiles and can severely injure personnel and damage equipment.
154
Describe the minimum safety zones for aircraft engines.
These zones vary with different aircraft, but the minimum safe operating distances are 25 feet from the front of the intake, 5 feet from either side of the intake, and 200 feet from the exhaust of any aircraft with running engines.
155
What is the noise safety zone for aircraft engines?
Approximately 300 to 400 feet at the rear of the aircraft, depending on the type of aircraft.
156
What invisible hazard is produced by aircraft and can damage body tissue, particularly the eyes?
Aircraft radar.
157
If you are required to work in an aircraft cockpit what special precautions should you take?
Make sure all safety pins are flagged and installed.
158
What do you do before you begin any maintenance on a weapon system?
Check the forms.
159
Who is authorized to upgrade an aircraft write-up? When or why?
A person of higher authority within the maintenance activity. When he or she believes the condition is more serious than represented by the symbol, they can upgrade the symbol.
160
Who is the approving authority to downgrade a RED X?
The Operations Group commander.
161
What goes over the RED X when signing it off?
Put your first initial of your last name.
162
Give the condition and an example for a red x symbol.
Grounding condition, aircraft is unsafe to fly until fixed.
163
Give the condition and an example for a red diagonal symbol.
Unsatisfactory condition, may affect safety or flying efficiency of the aircraft.
164
Give the condition and an example for a red dash symbol.
Unknown condition, aircraft may require inspection, functional checkflight, or a scheduled accessory replacement.
165
On what occasion is it acceptable to erase a RED symbol entered in the aircraft forms?
Never.
166
What Air Force equipment items will have an AFTO 244?
All powered and non-powered AGE and SE, training equipment, TMDE equipment, vehicular support equipment, all industrial machinery and industrial plant equipment.
167
What TO gives information on equipment forms documentation?
TO 00–20–5, Inspection System and Status Reporting For Support and Training Equipment.
168
What part of the AFTO form 244 contains the inspection type?
Part III.
169
What part of the AFTO form 244 contains the NSN?
Part I.
170
What is part IV of the AFTO form 244 used for?
The Supervisory review.
171
What items do you look for when inspecting a hammer prior to use?
The handle for cracks and splits, or being broken; the head for nicks, mushroomed areas, or burrs.
172
What are the included angles for the points of prick punches and center punches?
60 degrees for prick punches; 90 degrees for center punches.
173
How do you select the size of the drive punch you need to remove a bolt or a pin?
Select one closest in diameter to the bolt or pin you’re trying to remove.
174
If you’re going to sharpen a chisel to cut a piece of C- steel, what should be the included angle of the cutting edge?
70 degrees.
175
What procedure should you follow when using an adjustable wrench to tighten or loosen a bolt?
Always use the wrench so the pressure is against the solid jaw when the wrench is turned. When properly used, you would turn the wrench in the direction of the adjustable jaw.
176
What are the sources of power for powered hand tools?
Air (pneumatic), battery, or electrical power.
177
List three general safety guidelines to follow when using power tools.
Any three of the following: (1) Never use electric equipment in wet or damp conditions. (2) Properly ground all electric tools prior to use. (3) Do not use electric tools near flammable liquids or gases. (4) Inspect all pneumatic hose lines and connections prior to use. (5) Keep constant watch on the air pressure to stay within specified limits. (6) Keep all equipment in proper working order and use the equipment according to the manufacturer’s instructions. (7) Remove chuck keys from drills prior to use. (8) Hold tools firmly and maintain good balance. (9) Secure the work in a holding device, not in your hands. (10) Wear eye protection while operating these machines. (11) Ensure all lock buttons or switches are off before plugging the machine tool into the power source.
178
What is the safe air pressure for operating a pneumatic drill?
90 to 110 psi.
179
How do you keep a pneumatic drill motor lubricated?
Put a drop of oil in the air intake about once a week.
180
What can happen if a grinding wheel becomes damaged during use? How can you protect yourself and others from personal injury if this occurs?
The wheel can disintegrate while you’re using it. Wear goggles and a face shield, and use protective shields or curtains around the grinding area to protect other personnel in the shop.
181
Why don’t you use a grinder on or near an aircraft?
Because the sparks produced by the grinding operation could cause a fire.
182
How is the proper cutting pressure obtained with a portable band saw?
By using the weight of the portable band saw.
183
What determines the cost of a surface plate?
Size and accuracy.
184
How do you place heavy parts or tools on a surface plate?
By setting them on the edge and sliding them into position.
185
The gage blocks you are most likely to use in the shop are manufactured within what tolerance?
+0.000010-inch and –0.000006-inch.
186
How do you select gage blocks when you’re setting them up for a dimension?
Begin by selecting the thicker blocks first; then, add thinner blocks until you get the correct dimension. Try to use as few blocks as possible.
187
Why don’t you touch the gaging surface of the blocks with your bare hands?
Moisture from your hands can cause the blocks to corrode.
188
What is the purpose of the telescoping gage?
To gage slots or holes.
189
Why is it necessary to ensure a small-hole gage is properly aligned while checking it with a micrometer?
To prevent erroneous readings.
190
Which gage would you use to center a thread-cutting tool on a lathe?
Center gage.
191
What gage do you use to determine if a bolt has the proper amount of threads?
Screw pitch gage.
192
Which type of gage is very helpful for checking the accuracy of small bends and rounded edges in formed metal?
Radius gage.
193
What gage do you select if you are trying to measure the gap between a bearing and its housing?
Feeler gage.
194
What is the pitch of the spindle screw on an outside micrometer?
40 threads per inch.
195
How many thousandths of an inch does the spindle move if it is revolved three complete turns?
0.075.
196
On a micrometer, what part of an inch does each graduation on the vernier scale represent?
0.0001.
197
What effect can dust and grit have on a micrometer?
They can cause play in the spindle or the barrel to bind.
198
How does the 0 reading on a depth micrometer differ from the 0 reading on an outside micrometer?
A “0” reading on a depth micrometer has all the graduations on the barrel exposed, while the “0” reading on an outside micrometer requires all the graduations on the barrel be covered.
199
What part of a depth micrometer is subject to damage if held incorrectly?
Extension rod.
200
What can result from installing dirty extension rods on inside and depth micrometers?
They can be damaged by the abrasive action of the dirt and dust, making the readings erroneous.
201
Why is a vernier caliper more versatile than a micrometer?
It can take the place of several inside and outside micrometers.
202
On the vernier caliper and height gage, what part of an inch does each graduation on the vernier scale represent?
0.001 inch.
203
What attachment is used with the height gage to measure heights of less than 1 inch from the bottom of the base?
Offset attachment.
204
What is the purpose of an acute angle attachment?
Used in conjunction with a vernier bevel protractor to permit a longer line of contact on parts that have angles of less than 30°.
205
What happens to a dial indicator when it is in contact with a part or component that is struck with a hammer?
It receives nearly the same shock that the work receives, which can damage the indicator.
206
Why does a coaxial dial indicator provide a more accurate location than a standard dial indicator?
Because operating conditions are more closely replicated, such as the influence of power transmission, lubricant flow, and torque.
207
What type of blade should you use to cut through a 1-inch brass rod with a hacksaw?
All-hard.
208
When starting a cut on a piece of stock, what can you do to prevent the hacksaw blade from sliding?
File a notch on the work before you start sawing.
209
What are some hints that will help speed up sawing operations?
Apply a little oil to the blade to reduce binding, clamp thin stock between two pieces of wood to prevent chatter, and keep the work tight in the vise to keep it from slipping.
210
Besides length, what is the main difference between an 8-inch single-cut bastard file and a 10inch single-cut bastard file?
A 10-inch single-cut bastard file is coarser because the distance between the teeth increases as the length of the file increases.
211
What is pinning?
The lodging of metal particles in the file teeth.
212
What types of cuts does a flat file contain?
Double-cut on both sides and single-cut on both edges.
213
Which type of file has a “safe” edge? Describe its use.
The pillar file; used for filing keyways and slots.
214
When would you use a helical fluted reamer?
When you want to make an interrupted cut, like in a hole with a keyway.
215
What is the purpose of the bore and taper on a solid-blade expansion reamer?
To permit adjustment on the reamer when you turn the adjustment screw.
216
Which reamer has a taper of ¼ inch per foot?
Taper pin reamer.
217
When is a line reamer used?
When reamed holes with the same diameter must be aligned.
218
How do you prepare a hole for broaching?
The hole should permit the broach pilot to enter freely, but not let it fall freely past the first cutting tooth.
219
What type of pressure is applied when you are using a broach?
Slow and even.
220
After you’ve finished broaching the hole, what do you do?
Push the broach all the way through the hole, and catch it as it exits the hole.
221
How do the three common types of hand taps differ?
(1) A taper tap has a taper of eight to 10 threads. (2) A plug tap has a taper of three to five threads. (3) A bottoming tap has a taper of one to two threads
222
Would you drill a ½-inch-diameter hole before you use a ½-inch 13 tap? Explain.
No. If you drilled a ½-inch hole for a ½ – 13 tap, the hole and the tap would have the same major diameter and you wouldn’t be able to tap any threads into the hole.
223
Why do you occasionally turn the tap backwards as you are tapping?
To break the chips and help clear them from the teeth.
224
Before you try to back a broken tap out of a hole, what do you do?
Pick the chips out of the hole and from around the tap flutes.
225
If you’re trying to remove a broken tap that’s protruding out of the parent part, what can you do to help seat the vise grips easier?
Grind flats on the tap.
226
Which tap removal method would you use as a last resort?
Using a punch and hammer to break up the tap.
227
What features permit a die to produce rough and finish cuts?
A slot cut through one side of the body for adjustment and a setscrew to set adjustment.
228
What is the difference between the starting side and trailing side of a die?
The starting side of a die has approximately three threads tapered; the trailing side has approximately one thread tapered.
229
How can you cut threads to a shoulder while using a die?
Flip the die over in the diestock and cut the last two or three threads with the trailing side of the die.
230
What are the terms of any fraction?
The numerator and the denominator.
231
What is a least common denominator?
It is the least common multiple of the denominator of the fraction.
232
What is the difference between a proper fraction and an improper fraction?
A proper fraction is a true fraction of the whole, where the numerator is less than the denominator. An improper fraction has a whole unit or whole units, plus a fraction of another unit. The numerator is greater than the denominator.
233
Reduce the fraction 24/56.
3/7.
234
Reduce the fraction 21/63.
1/3.
235
Reduce the fraction 14/91.
2/13.
236
Reduce the fraction 68/3.
22 2/3.
237
Find the sum 1/2 + 2/3.
1 1/6
238
Find the sum 5/6 + 3/8.
1 5/24.
239
Find the difference 2/3 – 1/2.
1/6.
240
Find the difference 23/32 – 5/8.
3/32.
241
A piece of steel is 4 inches in diameter and 10 feet long. What is the ratio of the diameter to the length?
1:30.
242
What is the ratio of two different lathe spindles with RPM of 880 and 1320 respectively?
2:3.
243
A local manufacture calls for 75 taper pins. Of the 75 pins, 5 are scrapped. What is the percentage of unusable pins?
6 percent.
244
What is the Pythagorean theorem?
The square of the length of the hypotenuse of a right triangle equals the sum of the square of the other two sides. c2 = a2 + b2.
245
What is the sum of all angles in any triangle?
180 degress.
246
What constitute complementary angles of a right triangle?
If both acute angles equal each other, they are complementary.
247
Use the Pythagorean theorem to find the sides of a right triangle Given: a = 6 feet, b = 8 feet; Find: c = ?
c = 10 feet.
248
Use the Pythagorean theorem to find the sides of a right triangle Given: c = 5 meters, b = 4 meters; Find a = ?
a = 3 meters.
249
Which side of a right triangle is always the longest?
The hypotenuse is always the longest side.
250
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: sin .933580.
69 degress.
251
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: cos .314545.
7140′.
252
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: tan .984808.
4434′.
253
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: cos .846576.
3210′.
254
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: sin 1850′.
946462.
255
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: tan 21.
2.6050891.
256
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: cos 7000′.
.342020.
257
Use a scientific calculator or the trigonometric table found in the Machinery’s Handbook to find: cos 8910′.
.014544.
258
Convert the measurement to a decimal: 46 degrees 35'06"
465850
259
Convert the measurement to a decimal: 19 degrees 57'20"
19.9555.
260
Convert the measurement to a decimal: 89 degrees 06'59"
89.1163.
261
Convert the measurement to degrees, minutes, and seconds: 45.625.
4537′30″.
262
Convert the measurement to degrees, minutes, and seconds: 30.1125.
3006′45″.
263
Convert the measurement to degrees, minutes, and seconds: 11.346.
1120′45″.
264
What are bolts used with? What are they used for?
They are used with nuts and threaded holes. They are used to secure parts together.
265
How are setscrews used?
To fasten parts, such as pulleys, gears, etc. to shafts.
266
What consideration must you give penetrating fluid before you use it?
Check the label for compatibility with the parent material.
267
What are four bolt and stud removal methods that don’t take a lot of time?
A scribe, a punch, a file and wrench, and self-locking pliers.
268
When might you try using a file and a wrench to remove a broken bolt or stud?
When it is broken off above the parent metal.
269
When drilling for an extractor what is the most accurate method?
A drill jig.
270
What is the first step when drilling for an extractor?
Center punch the broken bolt and then use a pilot drill.
271
What can you use to make your own extractor in place of an Ezy-Out?
A high speed lathe tool with a square tapered end.
272
What should you do first when you try to remove a stuck screw?
Remove dirt or paint from the screw slot.
273
What item can you add to a standard speed handle to improve its performance?
A pressure pad.
274
What are the steps to remove screws with a screw removal tool?
Position the foot under the head of an adjacent screw. Adjust the sliding driver until the apex holder is directly over the screw you want to remove. Turn the T handle while maintaining pressure on the removal tool.
275
Where is a good place to use a pneumatic hammer to remove screws?
On cargo floors or other very solidly supported surfaces.
276
What important area must you inspect before you use a pneumatic hammer?
Check the amount and type of backing for the surface.
277
How far should you rotate a stuck screw with a pneumatic hammer?
No more than one quarter turn.
278
What’s the most common screw removal tool?
The screw punch.
279
When you use a screw punch to remove a stuck screw, should you use heavy blows or light taps with the hammer? Why or why not?
Use light taps, since heavy blows could cause you to damage the panel or drive the screw through the panel.
280
What are the tools you need when you remove screws with a hand impact tool?
The correct apex, apex holder, hammer, speed handle.
281
What screw removal method is especially useful when you have a large number of badly damaged screws?
Drilling the screws.
282
What tool do you use first when you drill off a screw head? or when you drill for an ezy-out?
A rotary file.
283
What tool should you try first when trying to remove a plug?
Use an extractor.
284
How can you prevent drill shavings and pieces of the plug from falling into the cavity or cylinder?
Pack grease in the center of the plug.
285
How many times can cotter pins be used?
Once.
286
What is the biggest disadvantage of using solid inserts?
They take up a large amount of space.
287
How far below the surface of the parent material should you seat the flange on a solid insert?
To 0.003” below the surface.
288
When you seat an insert with a locking ring, how far below the parent material should you seat the insert? How far below the parent metal surface should you seat the locking ring?
The insert should be 0.010” to 0.020” below the surface, and the lockring should be 0.005” to .0010” below the surface.
289
What type of insert gives the highest bolt pull out resistance with the least weight and space penalty of any thin walled inserts?
Rosan slimserts.
290
From what material are Rosan slimserts made?
17–4PH stainless steel.
291
What is the difference between SR slimserts and SRW slimserts?
SR series repair original design threads, SRW repair holes originally fitted with Heli-Coils. SRW are oversized inserts.
292
What feature on a slimsert keeps it from rotating in the parent material?
The top external threads are serrated and are swaged into the parent material.
293
What is the tensile strength of a Heli-Coil insert and from what material is it manufactured?
The tensile strength is 200,000 PSI; 18–8PH stainless steel.
294
What is the main disadvantage of using a Heli-Coil?
They cannot seal air or liquid pressure.
295
What item can you install in a hole if a standard size Heli-Coil is too small?
A Twinsert.
296
Why should you remove the pins from the Heli-Coil insert before removing the insert from the parent part?
Pulling it straight out of the hole damages the parent threads.
297
When you remove a pin insert, what is your first task?
Drill out the pins before you back the insert out of the hole.
298
What is another name for a bushing?
Bush.
299
What are the most common type of bushings?
Solid (sleeve and flanged), split, and clenched bushings.
300
What is the fit when you install a plain bearing?
An interference fit.
301
What features on both the parent material and the bearing keep the bearing aligned and keeps it from binding when you install it?
A chamfer.
302
Which bearing has a longer service life, a plain bearing or an anti-friction bearing?
Anti-friction bearings.
303
If you’re going to remove a bearing and reuse it, what precaution must you take?
Don’t put pressure on the inner race or roller when you press it out.
304
What’s the limitation to roller staking bearings in aluminum housings?
One time.
305
Describe the two methods of swaging bearings.
Double anvil swaging; both sides of the bearing outer race are swaged over the chamfer of the bearing housing. Roller swaging; the grooved outer race of the bearing is swaged over the chamfer of the bearing housing.
