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Tech Test Book 2 > TEST BOOK 3 > Flashcards

TEST BOOK 3 Flashcards

1
Q

What are two types of turnlock fasteners

A

camloc….. airloc

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2
Q

when are bolts used

A

to join parts under high tension or shear loads

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3
Q

bolt grip length is measured

A

under the head to the start of the thread(the end of the bolt)

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4
Q

what is TO 1-1A-8

A

Structural hardware, contains tables describing the different threads

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5
Q

where are bolt markings found

A

on the head of a bolt

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6
Q

what are the four most common part number designators

A

AN, NAS, MS, AMS

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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

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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

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9
Q

in a part number designator, what would the H mean in NAS1104-10H

A

the head is drilled

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10
Q

what are two very important consideration you must keep in mind when installing Bolts

A

Bolt and hole size…. and Torque

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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…

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12
Q

What is a light-drive fit

A

where you drill the hole slightly undersize and then ream it

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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

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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

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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

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16
Q

when using an E-z-out, which way do you turn it to extract the screw..

A

counter-clockwise….(lefty loosy)

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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.

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18
Q

When using a screw punch, what angle should you hold it at

A

about 10 to 15 degree angle

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19
Q

after you “Set” the screw punch, you should next angle the tool back about ___–___ degrees

A

30-45

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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

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21
Q

_____ _____ n/p’s provide a controlled amount of nut movement to compensate for subassembly misalignment

A

Floating Type

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22
Q

______ ____ nuts do not move once they are installed, so perfect alignment of all parts in an absolute must

A

Stationary type

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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

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24
Q

when is internal wrenching generally used

A

where high tensile strength is needed or space is limited

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25
Q

when are shear n/p’s used

A

used with drilled clevis bolts and threaded taper pins that are normally subjected to shearing stress only

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26
Q

when are castle head n/p’s used

A

with drilled shank, hexhead bolts, cleavis bolts, and drilled head studs…. designed to be secured with cotter pins

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27
Q

what are the three types of free spinning Nuts

A

on-off type, on residual torque off type and stressed

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28
Q

Nonmetallic insert nuts are limited to ___ deg. F

A

250

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29
Q

Cadmium-plated nuts are limited to ___ deg. F

A

450

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30
Q

Cres or stainless steel nuts are limited to ___ deg. F

A

800

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31
Q

what accounts for over 75% of all fastener problems

A

Fatigue Failure

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32
Q

Should you always use the Torque Values found in TO 1-1A-8?

A

NO, use the a/c or equipment specific TO

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33
Q

When are plain washers used

A

under AN hex nuts

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34
Q

**Why are Plain washers used

A

** used under lock washers to prevent damage to the surface material

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35
Q

**When are Lock Washers used

A

**used with machine screws or bolts where the self-locking or castellated-type nut isn’t appropriate .

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36
Q

**What prevents the Lock-washer from becoming loose

A

***the spring action of the washer

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37
Q

What are the three styles of Turnlock fasteners are there

A

Dzus (style I) Camloc(Style II) and Airloc (style III)

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38
Q

**The grip length of a stud assembly is indicated by…

A

by a # stamped on the head of the stud

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39
Q

***what does the stud assembly of a camloc include

A

***stud, cross-pin, spring and spring cup

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40
Q

what makes up a full Camloc fastener

A

stud assembly, grommet, grommet retaining ring, stud retaining ring and receptacle

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41
Q

The floating receptacle of a Camloc has how much playability

A

1/8”

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42
Q

When you have to replace a “rigid receptacle” to a camloc what should it be replaced with

A

the floating receptacle

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43
Q

**what are the three separate parts of an Airloc Fastener

A

studs, cross-pins, and receptacles

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44
Q

**what does the # stamped on an Airloc Fastener indicate

A

shows the total thickness of material a specific stud will satisfactorily lock together

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45
Q

**Once the cross-pin on an Airloc fastener has been removed, can you reuse it

A

NO

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46
Q

What happens when severe warpage or wrinkling of a panel makes it difficult to engage the Airloc receptacle

A

use a longer stud length of an additional .010” or .020”

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47
Q

***Once the cross-pin has been removed from the “Stud” can you reuse the Stud

A

NO

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48
Q

One method used to increase the fatigue life of structural members in highly stressed areas is called..

A

Split Sleeve Cold working

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49
Q

**With Split sleeve cold working the fatigue life of the fastener hole is typically __ to __ times greater than for holes not cold expanded

A

3 to 10

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50
Q

***What does cold working do to the hole diameter

A

Expands the hole

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51
Q

***What does the expansion of the hole diameter create

A

a radical plastic flow of material around the hole and **produces high residual compressive stresses

52
Q

***A zone of tension stress appears ___ to the zone of compressive stresses

A

adjacent

53
Q

Can holes that are slightly oval shaped or with a tapered bore be cold worked?

A

Yes…. if their dimensions are within hole tolerance

54
Q

What does an Axial ridge on the bore of the hole indicate

A

cold working

55
Q

when should you Never use Hi-shear rivets

A

where the grip length is less than the diameter of the pin

56
Q

Hi-shear rivets diameters are measured in… and grip length in..

A

32nd of an inch

and 16ths of an inch

57
Q

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

A

1/16”

58
Q

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

A

Away

59
Q

A stump lockbolt collar can be driven on a sloping surface not exceeding___deg.

A

7deg. perpendicular with the axis of the hole

60
Q

what will you find on the head of a Hi-lok

A

hi-lok pin type, and material compositon

61
Q

What does HL70 indicate

A

no washer attached… a W at the end would of meant one is

62
Q

What does HLT mean

A

Hi-Tigue fastener…

63
Q

The maximum total washer thickness should not exceed ___-inch when installing a hi-lok

A

.032”

64
Q

You should only use one washer when installing hi-loks unless you are using ___-inch washers, then you can use ___

A

.016” … can use 2

65
Q

what is the maximum interference fit that should be met when installing Hi-loks

A

.002”

66
Q

what is the slight radius under the head of a countersink and protruding-head hi-lok called

A

a Fillet

67
Q

is it acceptable to turn or torque down a hi-lok into an interference hole

A

under no circumstances is this acceptable

68
Q

when installing hi-tigue pins in interference holes, hole sizes are known as

A

B and L fits

69
Q

What is a B Fit hole for a hi-tigue fastener

A

smaller holes to ensure interference fit

70
Q

what are L Fit holes for Hi-tigue fasteners and what are they considered

A

slightly larger than B Fit by .002” and are considered a “line” fit hole

71
Q

Are there any authorized substitutes for Taper-Lok fasteners

A

NO

72
Q

A taper-lok fastener is slightly tapered ___-inch taper per foot

A

1/4”

73
Q

what are the two types of Taper-lok fasteners

A

standard and Injection

74
Q

What are Standard Taper-lok fasteners used for

A

where sealant is not required

75
Q

what are Injection Taper lok fasteners used for

A

allow local fuel leads to be resealed without removing the taper-lok from the hole

76
Q

what is the degree of a shear head taper-lok fastener

A

60deg

77
Q

what is the required amount of rivet material needed to form a shop head

A

1 1/2 times the rivet shank diameter

78
Q

how tall should the shop head be after it’s shot

A

1/2 times the shanks diameter

79
Q

**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.

A

**.002”

80
Q

Is shaving of steel Jo-bolt heads to meet the flush requirements permitted

A

NO

81
Q

what style of Jo-bolts must you inspect for looseness before they are shaved

A

Millable

82
Q

The dash # stamped on the head of the blind bolt indicates what

A

grip length

83
Q

Can bolt heads be shaved or milled to meet flushness requirements

A

NO

84
Q

what are the four steps in order for removing mechanical lock blind bolts

A

drill the pin, knock out the pin, counterbore the sleeve, remove the sleeve

85
Q

Standard mechanical lock blind rivets are used in ___sheet and sealing applications

A

Thick

86
Q

can you use mechanical lock blind rivets in thin-skin applications or in plastic materials

A

No. there’s insufficient bearing strength in thin sheets

87
Q

Bulbed-type mechanical lock blind rivets are also referred to as

A

Cherrylocks

88
Q

bulbed mechanical lok blind rivets are most effective in what type of applications and why

A

dimpled and thin-skinned applications because it clamps the skin together rather than swelling

89
Q

**Why are cherrylock fasteners good rivets to use for composites

A

**because very little if at all swelling takes place in the hole

90
Q

Bulbed mechanical lock blind rivets come in what sizes

A

1/64” OverSize……good for substitute for elongated holes without having to up size

91
Q

The minimum grip length for mechanical-lock blind rivets is always ___-inch LESS than that shown on the rivet head

A

1/16”

92
Q

when your substituting mechanical-lok blind rivets, you should substitute only rivets of

A

equal or greater strength

93
Q

Should a standard type mechanical -lock blind rivet be used to replace a bulbed type … and why

A

NO…. because of the difference in their diameter

94
Q

Do you drill completely through the sleeve of a mechanical-lok blind rivet to remove the rivet ??? Why

A

NO, this tends to enlarge the hole

95
Q

*****what are Composi-lok fasteners specifically designed for

A

**fastening graphite/epoxy composite structures

96
Q

what is the difference between a composi-lok and a composi-lok II

A

Comp II has a drive nut which speeds up installation

97
Q

on composi-lok II where do you locate the grip length

A

on the drive nut

98
Q

why are pull-thru rivets structurally weaker than other blind rivets

A

because of the hollow center

99
Q

**Any cable assembly that has one broken wire in a critical fatigue area must be …

A

*****replaced

100
Q

*****What is a critical fatigue area on a cable

A

the working length of the cable where it runs over, under or around a pulley or sheave. or through a fairlead

101
Q

In noncritical fatigue areas, how many broken wires are permitted

A

2

102
Q

how many broken cables does it take in a noncritical fatigue area for it to be replaced

A

3

103
Q

what happens when a cable is found to be kinked

A

needs to be repaired or replaced

104
Q

when should you Always replace nylon-jacketed cables

A

when there are cracks in the jacket

105
Q

what does corrosion on the interior strands of a cable indicate

A

it constitutes as cable failure and needs to be replaced immediately

106
Q

how far do you insert the cable into the terminal for swaging

A

1”

107
Q

if the terminal is bent more than the allowable ___ deg. place it securely in a vise and _____

A

1/2 deg. straighten it back out

108
Q

**when testing a fabricated cable, how much of a test load is applied

A

60% of the minimum-allowable breaking strength to the other end of the cable.

109
Q

***how long do you hold the cable under tension when testing it

A

3 minutes then release and examine

110
Q

Aluminum alloy ___-O and ___-O cannot withstand high pressure and are not used on hydraulic systems

A

1100-O and 6061-O

111
Q

rework a nick in a line no deeper than ___ % of the wall thickness of aluminum, aluminum alloy, or steel tubing

A

15

112
Q

when starting bends, start them __ to ___ inches from the fittings because the sleeve and nuts must be slipped back during fabrication

A

2 to 3

113
Q

a hacksaw with __ teeth per inch blade may be used to cut tubing

A

32

114
Q

what TO is Aviation Hose and Tube Manual

A

42E-1-1-1

115
Q

what is a mandrel

A

is a solid bar that slips into the tubing. provides a bearing surface for the tubing wall and prevents kinking

116
Q

**Squareness requirements; For flares to seat properly, they should be

A

square and concentric with the tubing and fitting sleeve.

117
Q

on the double flaring machine, what must you adjust for different wall thickness

A

the tube stop

118
Q

Can sleeves be removed from tubing and reused

A

NO

119
Q

the permaswage system applies pressure up to ____psi

A

3000PSI

120
Q

when deburring tubing, your chamfer width should never exceed ___ the wall thickness of tubing

A

1/2

121
Q

**maintain the swage tool for permaswage repair fully on the fitting butted against the end plate while applying hydraulic pressure of

A

10,000PSI +/- 250psi

122
Q

***Expanders designed for Titanium tubing have an area on the stop collar that is painted…

A

Yellow

123
Q

What color on the stop collar identifies aluminum and stainless steel for tubing expanders

A 
alum = Blue
S/S = Green
124
Q

is reswaging permitted when shooting dyna tube

A

NO

125
Q

when swaging permalite fittings, never exceed __ psi

A

10,000PSI

126
Q

a minimum of __ shop PSI is required to operate a permalite hydraulic pump

A

80psi

127
Q

is it okay if after swaging a permalite fitting there is a gap between the inspection mark and the fitting…

A

NO

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