Module 7.8

Question 1

Where must rivets not be used for?

Answer 1

-tensile force area
-not on thick materials

Question 2

How is an air/water tight seal achieved?

Answer 2

Use sealant

Question 3

What are 3 types of riveted joints?

Answer 3

-lap
-flush
-joggle

Question 4

Are lap joints aerodynamically smooth?

Answer 4

No they’re not aerodynamic

Question 5

When would a flush joint be used?

Answer 5

Aerodynamic structure that needs to be streamlined

Question 6

In a flush patch repair what is the patch secured to?

Answer 6

A doubler

Question 7

What are the two uses of a joggle joint?

Answer 7

-combination of flush and lap to produce a flush side
-fitting doublers over internal structures

Question 8

What is the pitch of a rivet?

Answer 8

Distance between two adjacent rivets

Question 9

What is the difference between edge margin and edge distance?

Answer 9

-edge distance is from the edge of the hole to the edge of the sheet
-edge margin is centre of hole to edge of sheet

Question 10

What’s rivet spacing?

Answer 10

Distance between fastener rows (4-5D)

Question 11

What’s the sphere of influence?

Answer 11

Area of sheet metal over which a rivet achieves a water tight seal (5D usually)

Question 12

When would you use a rivet cutter?

Answer 12

When you don’t have access to the correct size rivet

Question 13

What are bucking bars and what is important to consider when choosing one?

Answer 13

They’re used to deform the tail of the rivet.Choose the correct shape for the access you have.

Question 14

Slow hitting rivet guns are most common.What is the range in operating speed?

Answer 14

900-2500 blows per minute

Question 15

When selecting a rivet header what should you ensure?

Answer 15

Correct header,correct size, dome for universal

Question 16

When can compression riveting be used?

Answer 16

Access to both sides.Hand held and riveting

Question 17

What are the two types of squeeze rivet jaws?

Answer 17

Yoke and alligator yoke

Question 18

How do you hold two sheets of material together for riveting?

Answer 18

-skin pins
-cleco pins
-gripper pins

Question 19

When would you use a rivet shaver?

Answer 19

When you need to shave down the mandrill of blind rivets or on countersunk rivets if permitted

Question 20

What are two methods of countersinking and what’s the most common angle?

Answer 20

-freehand
-microstop
At 100 degrees

Question 21

When would you dimple?

Answer 21

Material too thin to countersink. Knife edges are stress rousers.

Question 22

What are the 3 methods of dimpling?

Answer 22

-coin dimpling
-radius dimpling
-hot dimpling

Question 23

If replacing a rivet due to damage or misforming what must be done?

Answer 23

1/32 larger diameter

Question 24

If the snap head is too big what occurs?too small?not placed correct?

Answer 24

-too big damaged skin
-too small damaged rivet head
-not square damage rivet head and skin

Question 25

Two types of misformed tails are?

Answer 25

Dragged or stepped

Question 26

What are some unacceptable types of rivet forming?

Answer 26

-dragged or stepped rivet
-shanked rivet
-part gap
-tail cracks
-bell shape tail

Question 27

How should the size of a formed rivet tail be checked?

Answer 27

Go/no go gauge