Sheetmetal

Question 1

What is done with the stem of a friction lock rivet?

Answer 1

Trimmed flush with head

Question 2

Example of self plugging rivet?

Answer 2

Cherry lock, Cherry Max or Huck

Question 3

Tool to install Cherry lock?

Answer 3

Hand or air puller

Question 4

Proper rivet shop head?

Answer 4

1 1/2 dw x 1/2 d tall

Question 5

What is bonded honey comb construction?

Answer 5

Laminator (two metal sides bonded to honeycomb)

Question 6

Materials used in bonded honey comb?

Answer 6

Stainless, titanium, magnesium, plywood, glass nylon and cotton cloth

Question 7

What are some causes of delamination in honeycomb?

Answer 7

Sonic vibe, liquid, internal condensation,manu. Flaw

Question 8

What is potting compound used for?

Answer 8

Hole filling in honeycomb

Question 9

What is done with the damaged area of honeycomb?

Answer 9

Must be removed

Question 10

What causes crazing?

Answer 10

Stress, improper handling, and harmful solvents

Question 11

How do you drill Plex?

Answer 11

Back up with wood feed drill slowly

Question 12

What should be done to a twist drills used to drill Plex?

Answer 12

60° tip angle, zero rake on cutting edge, back lip angle increased to 12° to 15°

Question 13

Calculations made when bending sheet metal? 

Answer 13

Bend allowance and setback

Question 14

What must be done where to bends intersect?

Answer 14

Relief holes drilled

Question 15

What type of weathering damage may be found on aluminum aircraft?

Answer 15

Corrosion

Question 16

Methods of forming sheet metal?

Answer 16

Shrinking, stretching, bumping, crimping and folding

Question 17

Factors of setback?

Answer 17

Radius and thickness

Question 18

Purpose of lightning holes?

Answer 18

Reduce weight

Question 19

What is a joggle?

Answer 19

Offset formed to allow clearance

Question 20

Total length of a rivet installation?

Answer 20

Grip link and one and a half times shrank diameter

Question 21

Proper material and repair?

Answer 21

Same as original

Question 22

Single row spacing and ED of protruding heads?

Answer 22

2D (2x Rivet diameter) Edge distance and 3D rivet spacing

Question 23

Describe rivet head markings?

Answer 23

1100, 5056, 2024, 2117, 2017

Question 24

Dimpling versus countersink?

Answer 24

Material thickness

Question 25

Most common rivet failure?

Answer 25

Shear

Question 26

Replace a 2024 with 2117?

Answer 26

For 5/32 Or use next larger size of 2117