6.5.4

Question 1

How is a upset head of a rivet formed?

Answer 1

Deformation of the shank

Question 2

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

Answer 2

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

Question 3

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

Answer 3

US material 1100

Question 4

What rivets are heat treated by the manufacturer?

Answer 4

2017, 2117, 7050

Question 5

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

Answer 5

They’re too weak and soft

Question 6

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

Answer 6

Aluminium alloy

Question 7

How are 2117 aluminium alloy (AD) rivets identified?

Answer 7

A small simple on the head

Question 8

How are 2017 aluminium alloy (D) rivets identified?

Answer 8

By a raised dot

Question 9

How are 2024 aluminium alloy (DD) rivets identified?

Answer 9

Two raised dashes

Question 10

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

Answer 10

-10°F or lower

Question 11

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

Answer 11

15 minutes

Question 12

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

Answer 12

The rivet must be thrown away

Question 13

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

Answer 13

Magnesium to be used to avoid dissimilar metal contact

Question 14

How are 5056 aluminium alloy (B) rivets identified?

Answer 14

A raised cross

Question 15

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

Answer 15

Fastening corrosion-resistant steel sheets

Question 16

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

Answer 16

They have no markings

Question 17

What are Monel (M) rivets made from?

Answer 17

Nickel alloy

Question 18

How are Monel (M) rivets identified?

Answer 18

With a raised r

Question 19

How are titanium (T) rivets identified?

Answer 19

A raised V or T

Question 20

When are titanium (T) rivets used?

Answer 20

When fastening steel alloy and titanium alloy together

Question 21

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

Answer 21

It is 5

Question 22

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

Answer 22

It is 12

Question 23

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

Answer 23

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

Question 24

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

Answer 24

To hold it in place during installation

Question 25

When does the hexagonal drive-end shear off?

Answer 25

When it has reached its correct torque value

Question 26

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

Answer 26

Remove the lubrication

Question 27

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

Answer 27

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

Question 28

What is one benefit of using a taper-Lok?

Answer 28

It has a balanced stress radius

Question 29

How is a lock bolt installed?

Answer 29

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

Question 30

How is a blind lock bolt installed?

Answer 30

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

Question 31

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

Answer 31

a Hi-Lok

Question 32

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

Answer 32

CRES or titanium pins

Question 33

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

Answer 33

- interference or transition fit - clearance fit in thin structure - clearance fit in thick structure

Question 34

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

Answer 34

To try keep it lubricated from manufacture

Question 35

When are oversized cherrylocks used?

Answer 35

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

Question 36

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

Answer 36

Because the mandrel falls away and becomes FOD

Question 37

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

Answer 37

Break head and break stem

Question 38

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

Answer 38

Loosen with vibration and difficult to remove when loose

Question 39

What is meant by grip length?

Answer 39

The combined thickness of the material about to be joined

Question 40

Why must you never file down a blind rivet fastener?

Answer 40

Because it will weaken the lock

Question 41

What is a rivnut and why is it used?

Answer 41

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