2A7X1 Air Force
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Good housekeeping is the responsibility of
all shop personnel
The lowest temperature at which combustible vapors will ignite is known as the
flash point
If you're working with a solvent that has been agitated, what should you do?
Provide adequate ventilation
Who must provide written permission to allow storage of flammable liquids inside Air Force shops?
Base fire marshal
When performing a safety inspection in your shop, it is important to
look at things in an unbiased manner
What is the primary protective item used while welding?
Welding helmet
What protective item must an operator wear while running a grinder?
Face shield
To reduce the risk of electrical shock before you begin any welding operation, always ensure proper
machine ground
To ensure you have the correct amount of protection before welding, you should always inspect your helmet
filter lens
To prevent breathing dust or shavings when you're performing machining operations on beryllium or titanium, use
a particle mask
To prevent the risk of oxygen deficiency and suffocation in the work area when working with liquid nitrogen, always
properly vent the work area
What is the minimum safe operating distance from the engine intake of an aircraft with a running engine?
25 feet from the front and 5 feet from the side
What is the minimum safe operating distance in feet for a vehicle to drive from behind the exhaust of any aircraft with running engines?
200 ft
To prevent injury while performing maintenance on an aircraft control surface, you should
install safety locks or pins
To prevent accidents while performing maintenance from an approved aircraft maintenance stand, what items should you check?
Guard rails, safety pins, and wheel locks
Before you begin any maintenance on an aircraft,
check the aircraft forms
What symbol do you enter on the Air Force Technical Order (AFTO) Form 781A, Maintenance Discrepancy and Work Document, if you discovered a condition on an aircraft that makes it unfit for flight?
RED X
After maintenance on a RED X aircraft discrepancy is complete, the individual to sign off the RED X symbol is the
inspector that checked the completed work
What symbol do you enter on the Air Force Technical Order (AFTO) Form 781A, Maintenance Discrepancy and Work Document, if you discovered a condition on an aircraft that may affect flying safety but is not urgent enough to ground the aircraft?
RED /
What symbol do you enter on the Air Force Technical Order (AFTO) Form 781A, Maintenance Discrepancy and Work Document, if you discovered an unknown condition that requires inspection?
RED -
How many discrepancy entries can you make, per block, on Air Force Technical Order (AFTO) Form 781A, Maintenance Discrepancy and Work Document?
1
The Air Force Technical Order (AFTO) Form 244, Industrial/Support Equipment Record, conveys the
current status of the equipment
What item does not require an Air Force Technical Order (AFTO) Form 244, Industrial/Support Equipment Record?
Common and special hand tools
What section of the Air Force Technical Order (AFTO) Form 244, Industrial/Support Equipment Record, contains the support equipment (SE) service inspections, as well as the prior to use inspection documentation?
Part II
If you notice the fiberglass handle on your hammer is split, you should
replace the hammer
Which type of punch would you use to make center marks for drilling?
Center
For a hard-to-reach wrenching job, hold the pliers
tightly near the handle end for leverage
When using a handheld disk sander, approximately what angle should you maintain between the sanding disk and workpiece surface?
15 degrees
What is the proper pressure for cutting with a portable band saw?
The weight of the portable band saw
Two common types of surface plates are made of
cast iron and granite
What feature prevents cast iron surface plates from rocking on uneven surfaces?
Three legs
What material is recommended for the daily cleaning of granite surface plates?
Waterless cleaner
When properly stacking blocks together through wringing, precision gage blocks adhere to each other because of a
combination of molecular attraction and the cementing action of the oily film
What tool can you use if you find the vernier caliper too awkward to handle while trying to take a measurement?
Telescoping gage
What is the correct way to operate the telescoping gage when using it to gage a hole?
Set the gage in the hole, then slowly expand the plungers fully in the hole for measurement
Which gage is actually a group of steel blades that can be used individually or together to measure clearance?
Thickness gage
Each graduation on the thimble of an outside micrometer represents
0.001 inch
Before closing an outside micrometer
clean the thimble and anvil
Mounting extension rods on both ends of the inside micrometer increases its range to
12 inches
To obtain the correct diameter measurement of a hole when using an inside micrometer, you must add to the actual micrometer reading the length of the
body and extension rod
On an internal micrometer, how many points are used in its measuring contact system to facilitate obtaining very reliable readings?
Three
What is one advantage of using a vernier caliper?
One vernier caliper can replace several sets of micrometers
On vernier calipers, what is the maximum deviation of parallelism permitted?
0.0005 inch
What do you use to remove oil and grit from vernier calipers?
Dry-cleaning solvent
The vernier bevel protractor accurately divides a degree into segments of
5 minutes
When you center a part on a lathe with a dial indicator
back the indicator away, and then tap the work in the required distance
When using a coaxial dial indicator in the spindle of a milling machine
run the machine at 500 to 600 revolutions per minute
Which hacksaw blade do you use to saw hollow shapes and metals of light cross section?
Flexible
If you had to cut a very thin piece of material with a hacksaw, what could you do to keep the saw from chattering?
Clamp thin stock between two wood scraps
The cut of a file refers to the
coarseness and type of cut
Which file would you select if you had to repair damaged threads
Three-square
If you are going to use a taper pin reamer for a hole, what is the proper size of the rough hole?
0.002 to 0.015 inch smaller than the reamer
Which tool would allow you to shear or cut a square shape from a machined surface?
Broach
What is the first tap you would use when cutting threads in a blind hole?
Taper
On a tap, what does the marking "LH" after the thread series indicate?
The tap is left-handed
In preparing a hole for tapping, chamfer the hole to a diameter
equal to the thread major diameter
How would you check a tap for squareness after you have started it in the hole?
Use a square to check the tap and part surface at points that are 90° from each other
To remove a broken tap with at least ¼ inch of the tap protruding above the parent metal, first
use a scribe to pick the metal chips out of the hole
What is the difference between the starting and trailing sides of a die?
The starting side has three tapered threads; the trailing side has one tapered thread
What is the least common denominator (LCD) of 1/8, 5/16, and 3/4?
16
What type of fraction has one or both of its terms expressed as a fraction or mixed number?
Complex
The number 6/5 over 9 is an example of
a complex fraction
Reduce the improper fraction 8/6 to a mixed number:
1 - 1/3
What is the result when the fraction 1/8 is subtracted from the sum of the fractions 3/4 and 5/32?
25/32
The fraction 6/10 is expressed as a decimal by the number
.600
An 18-inch gear meshes with a 6-inch gear. If the large gear has 72 teeth, how many teeth does the small gear have?
24
You have completed a manufacture of 35 laminated shims. Of the 35 shims, seven are out of tolerance and must be scrapped. What is the percentage of scrapped parts?
20 percent
The Pythagorean Theorem bases its law on the fact that the square of the length of the hypotenuse of a right triangle is equal to the
sum of the squares of the other two sides
Using the Pythagorean Theorem, find the length of the hypotenuse (side c) of a triangle where side a = 3 inches and side b = 4 inches
5 inches
If the line rotates counterclockwise from the initial line, it creates a
positive angle
If the line rotates clockwise from the initial line, it creates a
negative angle
The position of the line at the start of an angle is known as the
initial line
Trigonometric functions are the numerical values of the angles and sides of
right triangles calculated by ratios between the sides and acute angles
Which side of a right triangle is the longest?
Hypotenuse
The three items you must know in order to determine the values of the rest of the angles and sides of a right triangle are: the function, the definition, and the
length of one side
The sine of an angle in a right triangle equals the
opposite side divided by the hypotenuse
The cosine of an angle in a right triangle equals the
adjacent side divided by the hypotenuse
The tangent of an angle in a right triangle equals the
opposite side divided by the adjacent side
When using a trigonometric table, like the table in the Machinery's Handbook, it's important to remember that all of the angles of a right triangle fall within what range?
0 to 90 degrees
You may be able to use a file and wrench to remove a broken bolt or stud, if
it is broken off above the surface of the parent metal
If you select an Easy-Out to remove a broken bolt or stud, drill
all the way through the bolt or stud
Before drilling off the head of a stuck screw
rotary file the screw slot to prevent the drill bit from catching and breaking
When drilling a screw out of a nutplate, it may be difficult to keep the drill centered because some
nutplates float or move around in their brackets
To remove a stripped screw with an Easy-Out, use a
T-handle tap wrench
When removing a broken spark plug, how many holes are provided in the face of a drill guide to permit drilling into the wall of the plug base?
Four
Which type of pin is used to keep parts in absolute alignment?
Taper
If you want to increase the shear strength of a spring or rolled pin,
insert one pin inside another
The biggest disadvantage to using solid inserts for repair is they
take up a large amount of space in the parent metal
The tool in the insert kit, providing a flat seating area for the lockring insert, is the
counterbore
The item on a lockring insert that provides a swaging action between the insert and the parent material is the
serrated teeth
When installing a lockring, its external teeth cut into the parent part and "swage" the lockring tight. To ensure it is properly installed, seat it below the parent metal surface by
0.005 - 0.010 inches
How many points must be on the internal wrenching surface of a Rosan slimsert in order for it to have self-locking threads?
6
After you install a Heli-Coil, remember to properly remove its drive tang by
using the breakoff tool
To remove a damaged Heli-Coil,
use the extractor
If you're going to drill out the pins on a pin insert, select a drill bit that's
one size under the pin diameter
To keep a bushing from binding when you press it into a hole, check
for the chamfered edge on the parent part
After you install a bushing, you may have to ream the inside diameter because
an interference fit causes bushings to contract slightly
Although staked bearings can withstand rotational loads, they cannot withstand
thrust loads
When double anvil swaging several bearings from the same lot, perform the operation using
the same load and tool for each swage
When performing a roller swaging operation, center the bearing in the housing and
make sure the bearing is square with the hole before you press it
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