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Mod 6 > 6.5.4 > Flashcards

6.5.4 Flashcards

1
Q

How is a upset head of a rivet formed?

A

Deformation of the shank

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2
Q

What is the rule of thumb when selecting a rivet size?

A

A rivet is to be 3 times the thickness of the thickest sheet being joined

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3
Q

What type of rivet is used in the ‘as fabricated’ condition?

A

US material 1100

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4
Q

What rivets are heat treated by the manufacturer?

A

2017, 2117, 7050

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5
Q

Why are 1100 aluminium (A) rivets not used on aircraft?

A

They’re too weak and soft

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6
Q

What are 2117 (AD), 2024 (DD) and 2017 (D) rivets made from?

A

Aluminium alloy

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7
Q

How are 2117 aluminium alloy (AD) rivets identified?

A

A small simple on the head

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8
Q

How are 2017 aluminium alloy (D) rivets identified?

A

By a raised dot

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9
Q

How are 2024 aluminium alloy (DD) rivets identified?

A

Two raised dashes

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10
Q

How are 2024 aluminium alloy (DD) rivets stored after heat treatment?

A

-10°F or lower

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11
Q

How quickly should 2024 aluminium alloy (DD) rivets be driven after removal from the freezer?

A

15 minutes

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12
Q

If a rivet is removed from cold storage and not used what must happen?

A

The rivet must be thrown away

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13
Q

What are 5056 aluminium alloy (B) rivets alloyed with and why?

A

Magnesium to be used to avoid dissimilar metal contact

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14
Q

How are 5056 aluminium alloy (B) rivets identified?

A

A raised cross

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15
Q

When are corrosion-resistant steel (F) rivets used?

A

Fastening corrosion-resistant steel sheets

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16
Q

How is the identification of corrosion-resistant steel (F) different?

A

They have no markings

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17
Q

What are Monel (M) rivets made from?

A

Nickel alloy

18
Q

How are Monel (M) rivets identified?

A

With a raised r

19
Q

How are titanium (T) rivets identified?

A

A raised V or T

20
Q

When are titanium (T) rivets used?

A

When fastening steel alloy and titanium alloy together

21
Q

If a rivet has a part number of MS20470 AD 5 - 12 what is its rivet diameter?

A

It is 5

22
Q

If a rivet has a part number of MS20470 AD 5 - 12 what is its rivet grip length?

A

It is 12

23
Q

What are the two parts to a Hi-Lok and Hi-Lite?

A

The threaded pin (bolt) and the collar (nut)

24
Q

Why does the pin of a Hi-Lok have a hexagonal recess at the end?

A

To hold it in place during installation

25
Q

When does the hexagonal drive-end shear off?

A

When it has reached its correct torque value

26
Q

Pins and collars are usually supplied lubricated, what must you do before use?

A

Remove the lubrication

27
Q

What is the difference between a Hi-Lok and a Hi-Lite?

A

A Hi-Lite does not have a thread run out area to save weight as it is useless

28
Q

What is one benefit of using a taper-Lok?

A

It has a balanced stress radius

29
Q

How is a lock bolt installed?

A

The pin is placed from the other side of the material and then the head is pushed down onto the pin from your side and the left over pin is removed

30
Q

How is a blind lock bolt installed?

A

You place the fastener in the hole and use the installation device to pull the pin through to creat heads on both sides

31
Q

If a lock bolt cannot be used due to access then what should e used?

A

a Hi-Lok

32
Q

When repairing lock bolt holes what type of lock bolt should be used?

A

CRES or titanium pins

33
Q

What are the three different procedures for installing a lock bolt?

A
  • interference or transition fit
  • clearance fit in thin structure
  • clearance fit in thick structure
34
Q

Why is it important to handle a cherry lock the least you can?

A

To try keep it lubricated from manufacture

35
Q

When are oversized cherrylocks used?

A

When a rivet has been removed and the next size up isn’t possible

36
Q

Why should you used a rivet catcher on a cherry ax rivet?

A

Because the mandrel falls away and becomes FOD

37
Q

What are the two types of tucker ‘pop’ rivets?

A

Break head and break stem

38
Q

Why are tucker ‘pop’ rivets not used on aircraft?

A

Loosen with vibration and difficult to remove when loose

39
Q

What is meant by grip length?

A

The combined thickness of the material about to be joined

40
Q

Why must you never file down a blind rivet fastener?

A

Because it will weaken the lock

41
Q

What is a rivnut and why is it used?

A

It is a rivet with a hollow threaded centre to allow quick attachment and removal on sheet metal

Mod 6 (17 decks)

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