Volume 1 Flashcards
What must be present to produce fire?
Fuel, heat, oxygen
Define flash point
The lowest temperature where combustible vapors will ignite is the flash point.
Define ignition point
Ignition point is the minimum temperature where a combustible will continue to burn.
What do you do if you store over 10 gallons of a flammable liquid?
Normally they are stored outside the building, in a cabinet painted yellow labeled “FLAMMABLE–KEEP FIRE AWAY”.
How often do you empty dirty/oily rags?
Empty them at least once a daily, and move to a safe location outside the building for secheduled pickup.
How to store clean rags?
In a separate container, marked “CLEAN RAGS ONLY”.
Who’s job is saftey?
Everyone
What is the saftey of sealded drums?
Don’t perform any cutting or welding on them.
When welding what type of ventailation do you need?
postive airflow
What metals do you need a particle mask for?
Beryllium, magnesium, titanium.
What is the saftey AFI?
AFI 91-203
Who are the MSDS posted for?
EVeryone
Where should you wear double hearing proctection?
It is advisable to wear double hearing protection when you are operating equipment inside a hanger, shelter, or bunker.
Where is the radar danger zone on aircraft?
The radar danger zone extends from the aircraft antenna in a radius of 50 feet and covers an arc of 100 degress.
What is the first step to take when leaaving the cock pit or flight deck area?
inspet your tools and equimpent and make sure you have accounted for every tool and every hardware item before you leave the area.
What is the purpose of maintance forms?
Maintance forms provide a permanent record of all maintance records.
What form is used to docment any maintance action on an aircraft or other weapon system?
AFTO 781
On the AFTO form 781 what does the signature consits of?
The first name initial, complete last name, grade, and employee number.
On the AFTO form 781 what does the date contain?
The day and the month each use two digits and the year uses only one.
How to upgrade a symbol on the AFTO Form 781?
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.
What to do if an erronous red symbol is entered in the forms?
Enter this statement in the corrective action block, “Symbol entered in error, Item reentered on page ____, item _____.”
If a RED X is entered who may authorize or direct an aircraft to fly?
No one
How many entries may be put under one RED X?
Each RED X symbol will always be a separte AFTO Form 781A entry.
How many signatures does a RED X reguire?
TWO
How are RED DIAGONAL enterented?
The RED DIAGONAL extends from the upper righthand corner to the lower left hand corner of the block.
With the RED DIAGONAL where else must it be released?
The RED DIAGONAL must also be released in block 9 of the AFTO 781H.
What is the most common symbol entered in on the AFTO 781A?
The RED DIAGONAL
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.
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.
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.
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.
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.
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.
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.
How do you tigten a lose hammer head?
try to replace the wedge, if that does not work replace the handle.
How to clean up the face of the hammer?
regrind it to clean it up.
What is the most common type of hammer in Metals Technology shops?
The ball peen hammer.
What are soft face hammers used for?
Soft face hammers are used to to strike heavy blows without marring the surface.
What are dead blow hammers filled with?
Lead shot to help increase the impact.
What is the included angle of a prick punch?
60
What is the included angle of a center punch?
90
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.
What is the included angle of a chisel?
60 or 70
When do you grind a 70 degree cutting edge on a chisel?
For cutting hard materials like carbon steel.
When do you grind a 60 degree cutting edge on a chisel?
For cutting soft materials like aluinum.
Where do you hold piers and why?
Hold them tightly near the end of the handle to create more leverage.
When do you not use a pair of pliers?
When you can use a wrench.
What do hex-key or Allen wrenches come in?
1/32 to 1 inch.
How to lubricate an air drill?
Put a drop of oil in the air intake about once a week.
How to hold a handheld sander?
Hold it so the sanding disk forms an angle of approximately 15 degrees.
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.
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.
What is the most common size of shop surface plates?
12 x 18 and 18 x 24.
What are the tolerance rage of surface plates?
0.00005 - 0.00025.
How to clean a cast iron surface plate?
Use dry-cleaning fluid with a clean cloth to remove any sticky flim, rust, or tarnish.
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.
How many gage blocks come in sets?
They come in sets of 5 to 103 in various thinknesses.
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.
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.
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.
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.
Describe an internal micrometer?
The internal micrometer uses a three-point measuring contact system to determice the size of a bore.
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.
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.
Who and when invented the vernier scale?
In 1631, Pierre Vernier, a French Mathematician.
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.
What is the accuracy of the bevel protractor?
The accuracy of the vernier bevel protractor is +/-1/12 degrees, or 5 minutes.
How fast do you run the spindle when using a coaxial dial indicator?
500 to 600 revoulutions per minute (RPM).
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
Describe a round file?
Round files are mainly used to file or enlarge circular openings, or to file concave surfaces.
Describe a square file?
Square files are used for filing keyways, slots, and corners, and for general use.
Describe a three-square file?
Three-square files are used for filing acute internal angles, clear out square corners, and repair damaged threads.
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.
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.
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.
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.
What material should not be broached?
Don’t broach materials harder than Rockwell C35.
With tapping how big should the chamfer be?
After dilling the hole the chamfer should be equal to the major diameter.
What is a fraction?
A fraction is a number that shows how man equal parts of a number or whole are taken or used.
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.
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.
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.
How do you change a common fraction to a decimal?
Divide the numerator by the denominator.
What is an acute angle?
An angle that is less than 90 degrees.
What do the sum of the angles of a triangle add up to?
180
What is a terminal line?
The line ending an angle?
What is an intial line?
The line starting an angle?
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.
What is the first step in using Vise Gribs or self-locking pliers?
Make sure the jaws are even by locking them together.
What is the drill size for a number 1 ezy-out?
5/64
What is the drill size for a number 2 ezy-out?
7/64
What is the drill size for a number 3 ezy-out?
5/32
What is the drill size for a number 4 ezy-out?
1/4
What is the drill size for a number 5 ezy-out?
17/64
What is the drill size for a number 6 ezy-out?
13/32
What is the drill size for a number 7 ezy-out?
17/32
What is the drill size for a number 8 ezy-out?
13/16
What is the drill size for a number 9 ezy-out?
1 1/16
What is the drill size for a number 10 ezy-out?
1 5/16
What is the drill size for a number 11 ezy-out?
1 9/16
What is the drill size for a number 12 ezy-out?
1 15/16
How do you insert an ezy-out in a hole?
Tap it only light enough to seat it.
What angle do you grind a screw punch to?
10 degrees
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.
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.
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.
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.
How deep should a rosan slimserts sit below the parent metal?
0.005 to 0.010.
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).
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.
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.
How deep should a keenserts be seated?
0.005 to 0.010.
What are anti-friction bearings hardened to?
Rockwell “C” 60-63.