TEST BOOK 3 Flashcards
(127 cards)
1
Q
What are two types of turnlock fasteners
A
camloc….. airloc
2
Q
when are bolts used
A
to join parts under high tension or shear loads
3
Q
bolt grip length is measured
A
under the head to the start of the thread(the end of the bolt)
4
Q
what is TO 1-1A-8
A
Structural hardware, contains tables describing the different threads
5
Q
where are bolt markings found
A
on the head of a bolt
6
Q
what are the four most common part number designators
A
AN, NAS, MS, AMS
7
Q
what does the part number designation tell you
A
type of bolt, diameter, length, length of grip and it also states if the head or shank is drilled
8
Q
in part number desgnation, what does NAS1104-10D mean
A
nas=national aircraft standards, 4 indicates bolt is 1/4” in diameter, -10 grip length of .625” and D- shank is drilled
9
Q
in a part number designator, what would the H mean in NAS1104-10H
A
the head is drilled
10
Q
what are two very important consideration you must keep in mind when installing Bolts
A
Bolt and hole size…. and Torque
11
Q
if a Bolt hole is oversized or elongated what could happen
A
the bolt will not carry its shear load until the parts have yielded or deformed enough to allow the bearing surface of the oversized hole to come in contact with the bolt…
12
Q
What is a light-drive fit
A
where you drill the hole slightly undersize and then ream it
13
Q
A light drive fit is defined as an interference fit if it’s ____–inch for 5/8-inch-diameter bolts or a proportionate amount of the interference for other size bolts
A
.006”-inch
14
Q
How is “Fit” defined in terms of a bolt
A
in terms of the friction between the bolt and hole when the bolt is driven in place
15
Q
Is the use of a pneumatic hammer authorized for the use of removing a screw and why
A
NO… can damage a/c structure and skin
16
Q
when using an E-z-out, which way do you turn it to extract the screw..
A
counter-clockwise….(lefty loosy)
17
Q
what happens if, when using the Screw Punch method you do not take caution in doing so
A
improper support can cause significant chisel slippage, panel damage, and/or substrate damage.
18
Q
When using a screw punch, what angle should you hold it at
A
about 10 to 15 degree angle
19
Q
after you “Set” the screw punch, you should next angle the tool back about ___–___ degrees
A
30-45
20
Q
When using the Screw punch, turn the screw about a __ of a turn, then use a screw driver or speed handle to remove it
A
1/4
21
Q
_____ _____ n/p’s provide a controlled amount of nut movement to compensate for subassembly misalignment
A
Floating Type
22
Q
______ ____ nuts do not move once they are installed, so perfect alignment of all parts in an absolute must
A
Stationary type
23
Q
why are bonded n/p’s good for composite and metallic structures
A
because the eliminate the need to drill small rivet holes
24
Q
when is internal wrenching generally used
A
where high tensile strength is needed or space is limited
25
when are shear n/p's used
used with drilled clevis bolts and threaded taper pins that are normally subjected to shearing stress only
26
when are castle head n/p's used
with drilled shank, hexhead bolts, cleavis bolts, and drilled head studs.... designed to be secured with cotter pins
27
what are the three types of free spinning Nuts
on-off type, on residual torque off type and stressed
28
Nonmetallic insert nuts are limited to ___ deg. F
250
29
Cadmium-plated nuts are limited to ___ deg. F
450
30
Cres or stainless steel nuts are limited to ___ deg. F
800
31
what accounts for over 75% of all fastener problems
Fatigue Failure
32
Should you always use the Torque Values found in TO 1-1A-8?
NO, use the a/c or equipment specific TO
33
When are plain washers used
under AN hex nuts
34
****Why are Plain washers used
**** used under lock washers to prevent damage to the surface material
35
****When are Lock Washers used
****used with machine screws or bolts where the self-locking or castellated-type nut isn't appropriate .
36
****What prevents the Lock-washer from becoming loose
***the spring action of the washer
37
What are the three styles of Turnlock fasteners are there
Dzus (style I) Camloc(Style II) and Airloc (style III)
38
****The grip length of a stud assembly is indicated by...
by a # stamped on the head of the stud
39
***what does the stud assembly of a camloc include
***stud, cross-pin, spring and spring cup
40
what makes up a full Camloc fastener
stud assembly, grommet, grommet retaining ring, stud retaining ring and receptacle
41
The floating receptacle of a Camloc has how much playability
1/8"
42
When you have to replace a "rigid receptacle" to a camloc what should it be replaced with
the floating receptacle
43
****what are the three separate parts of an Airloc Fastener
studs, cross-pins, and receptacles
44
****what does the # stamped on an Airloc Fastener indicate
shows the total thickness of material a specific stud will satisfactorily lock together
45
**Once the cross-pin on an Airloc fastener has been removed, can you reuse it
NO
46
What happens when severe warpage or wrinkling of a panel makes it difficult to engage the Airloc receptacle
use a longer stud length of an additional .010" or .020"
47
***Once the cross-pin has been removed from the "Stud" can you reuse the Stud
NO
48
One method used to increase the fatigue life of structural members in highly stressed areas is called..
Split Sleeve Cold working
49
****With Split sleeve cold working the fatigue life of the fastener hole is typically __ to __ times greater than for holes not cold expanded
3 to 10
50
***What does cold working do to the hole diameter
Expands the hole
51
***What does the expansion of the hole diameter create
a radical plastic flow of material around the hole and ****produces high residual compressive stresses
52
***A zone of tension stress appears ___ to the zone of compressive stresses
adjacent
53
Can holes that are slightly oval shaped or with a tapered bore be cold worked?
Yes.... if their dimensions are within hole tolerance
54
What does an Axial ridge on the bore of the hole indicate
cold working
55
when should you Never use Hi-shear rivets
where the grip length is less than the diameter of the pin
56
Hi-shear rivets diameters are measured in... and grip length in..
32nd of an inch
| and 16ths of an inch
57
Regardless of the method used to determine the grip length, the straight portion of the shank should NOT extend more than ____-inch through the material
1/16"
58
Be careful to ensure the collar is installed with the compression head ____ from the sheet before applying the swaging set on stump-type lock bolts
Away
59
A stump lockbolt collar can be driven on a sloping surface not exceeding___deg.
7deg. perpendicular with the axis of the hole
60
what will you find on the head of a Hi-lok
hi-lok pin type, and material compositon
61
What does HL70 indicate
no washer attached... a W at the end would of meant one is
62
What does HLT mean
Hi-Tigue fastener...
63
The maximum total washer thickness should not exceed ___-inch when installing a hi-lok
.032"
64
You should only use one washer when installing hi-loks unless you are using ___-inch washers, then you can use ___
.016" ... can use 2
65
what is the maximum interference fit that should be met when installing Hi-loks
.002"
66
what is the slight radius under the head of a countersink and protruding-head hi-lok called
a Fillet
67
is it acceptable to turn or torque down a hi-lok into an interference hole
under no circumstances is this acceptable
68
when installing hi-tigue pins in interference holes, hole sizes are known as
B and L fits
69
What is a B Fit hole for a hi-tigue fastener
smaller holes to ensure interference fit
70
what are L Fit holes for Hi-tigue fasteners and what are they considered
slightly larger than B Fit by .002" and are considered a "line" fit hole
71
Are there any authorized substitutes for Taper-Lok fasteners
NO
72
A taper-lok fastener is slightly tapered ___-inch taper per foot
1/4"
73
what are the two types of Taper-lok fasteners
standard and Injection
74
What are Standard Taper-lok fasteners used for
where sealant is not required
75
what are Injection Taper lok fasteners used for
allow local fuel leads to be resealed without removing the taper-lok from the hole
76
what is the degree of a shear head taper-lok fastener
60deg
77
what is the required amount of rivet material needed to form a shop head
1 1/2 times the rivet shank diameter
78
how tall should the shop head be after it's shot
1/2 times the shanks diameter
79
****to adjust a microshaver, you test it on a piece of scrap metal until it no longer marks the surface... How close is the cutter to the metal at this point.
****.002"
80
Is shaving of steel Jo-bolt heads to meet the flush requirements permitted
NO
81
what style of Jo-bolts must you inspect for looseness before they are shaved
Millable
82
The dash # stamped on the head of the blind bolt indicates what
grip length
83
Can bolt heads be shaved or milled to meet flushness requirements
NO
84
what are the four steps in order for removing mechanical lock blind bolts
drill the pin, knock out the pin, counterbore the sleeve, remove the sleeve
85
Standard mechanical lock blind rivets are used in ___sheet and sealing applications
Thick
86
can you use mechanical lock blind rivets in thin-skin applications or in plastic materials
No. there's insufficient bearing strength in thin sheets
87
Bulbed-type mechanical lock blind rivets are also referred to as
Cherrylocks
88
bulbed mechanical lok blind rivets are most effective in what type of applications and why
dimpled and thin-skinned applications because it clamps the skin together rather than swelling
89
****Why are cherrylock fasteners good rivets to use for composites
****because very little if at all swelling takes place in the hole
90
Bulbed mechanical lock blind rivets come in what sizes
1/64" OverSize......good for substitute for elongated holes without having to up size
91
The minimum grip length for mechanical-lock blind rivets is always ___-inch LESS than that shown on the rivet head
1/16"
92
when your substituting mechanical-lok blind rivets, you should substitute only rivets of
equal or greater strength
93
Should a standard type mechanical -lock blind rivet be used to replace a bulbed type ... and why
NO.... because of the difference in their diameter
94
Do you drill completely through the sleeve of a mechanical-lok blind rivet to remove the rivet ??? Why
NO, this tends to enlarge the hole
95
*****what are Composi-lok fasteners specifically designed for
****fastening graphite/epoxy composite structures
96
what is the difference between a composi-lok and a composi-lok II
Comp II has a drive nut which speeds up installation
97
on composi-lok II where do you locate the grip length
on the drive nut
98
why are pull-thru rivets structurally weaker than other blind rivets
because of the hollow center
99
****Any cable assembly that has one broken wire in a critical fatigue area must be ...
*****replaced
100
*****What is a critical fatigue area on a cable
the working length of the cable where it runs over, under or around a pulley or sheave. or through a fairlead
101
In noncritical fatigue areas, how many broken wires are permitted
2
102
how many broken cables does it take in a noncritical fatigue area for it to be replaced
3
103
what happens when a cable is found to be kinked
needs to be repaired or replaced
104
when should you Always replace nylon-jacketed cables
when there are cracks in the jacket
105
what does corrosion on the interior strands of a cable indicate
it constitutes as cable failure and needs to be replaced immediately
106
how far do you insert the cable into the terminal for swaging
1"
107
if the terminal is bent more than the allowable ___ deg. place it securely in a vise and _____
1/2 deg. straighten it back out
108
****when testing a fabricated cable, how much of a test load is applied
60% of the minimum-allowable breaking strength to the other end of the cable.
109
***how long do you hold the cable under tension when testing it
3 minutes then release and examine
110
Aluminum alloy ___-O and ___-O cannot withstand high pressure and are not used on hydraulic systems
1100-O and 6061-O
111
rework a nick in a line no deeper than ___ % of the wall thickness of aluminum, aluminum alloy, or steel tubing
15
112
when starting bends, start them __ to ___ inches from the fittings because the sleeve and nuts must be slipped back during fabrication
2 to 3
113
a hacksaw with __ teeth per inch blade may be used to cut tubing
32
114
what TO is Aviation Hose and Tube Manual
42E-1-1-1
115
what is a mandrel
is a solid bar that slips into the tubing. provides a bearing surface for the tubing wall and prevents kinking
116
****Squareness requirements; For flares to seat properly, they should be
square and concentric with the tubing and fitting sleeve.
117
on the double flaring machine, what must you adjust for different wall thickness
the tube stop
118
Can sleeves be removed from tubing and reused
NO
119
the permaswage system applies pressure up to ____psi
3000PSI
120
when deburring tubing, your chamfer width should never exceed ___ the wall thickness of tubing
1/2
121
****maintain the swage tool for permaswage repair fully on the fitting butted against the end plate while applying hydraulic pressure of
10,000PSI +/- 250psi
122
***Expanders designed for Titanium tubing have an area on the stop collar that is painted...
Yellow
123
What color on the stop collar identifies aluminum and stainless steel for tubing expanders
```
alum = Blue
S/S = Green
```
124
is reswaging permitted when shooting dyna tube
NO
125
when swaging permalite fittings, never exceed __ psi
10,000PSI
126
a minimum of __ shop PSI is required to operate a permalite hydraulic pump
80psi
127
is it okay if after swaging a permalite fitting there is a gap between the inspection mark and the fitting...
NO
