Welding

Question 1

T/F
A certificated A&P mechanic is allowed to inspect welds.

Answer 1

True.
Only inspect.

Question 2

What are indications of a good weld?

Answer 2

Evenly spaced ridges.
Smooth taper.
No spattering.
Built up weld (added thickness)
No shaving of weld.

Question 3

What document is sent back with a part after a welding shop has performed a repair?

Answer 3

Form 8130

Question 4

Two forms of welding:

Answer 4

Fusion.
Non-fusion.

Question 5

Methods of Fusion welding:

Answer 5

Gas (oxyacetylene)
Electric arc
Electrical resistance.

Question 6

Types of electric arc welding:

Answer 6

SMAW
MIG
TIG

Question 7

Types of electrical resistance welding:

Answer 7

Spot
Seam

Question 8

Methods of non-fusion welding:

Answer 8

Brazing.
Soldering.

Question 9

What method uses a positive stick to a negative metal?

Answer 9

SMAW (stick)

Question 10

What method of welding is used on very thin sheet metal?

Answer 10

Electrical resistance spot weld.

Question 11

What is most damaging to a weld?

Answer 11

Inclusion of oxygen.

Question 12

What must always be done when moving bottles?

Answer 12

Ensure that the cap is in place.

Question 13

What is adjusted on an electric arc welder for different materials?

Answer 13

Amperage.

Question 14

How much should the valve on the acetylene bottle be opened when in use?

Answer 14

About a quarter turn.

Question 15

What safety precaution is taken to ensure there are no leaks from the screw fittings on valves and hoses?

Answer 15

Wipe soapy water on fittings and look for bubbling.

Question 16

Define neutral flame:

Answer 16

A flame in which the ratio of oxygen and acetylene is correct and there is no excess of oxygen or carbon.

Rounded inner cone and no feather around it.

Question 17

Three types of torch flames:

Answer 17

Neutral
Carburizing
Oxidizing

Question 18

Define carburizing flame (reducing flame):

Answer 18

Flame produced by an excess of acetylene.
Feather around the inner cone.

Question 19

Define oxidizing flame:

Answer 19

Flame in which there is an excess of oxygen.
Inner cone is pointed and a hissing sound is heard.

Question 20

Welds commonly used in aircraft construction:

Answer 20

Butt joint.
Lap joint.
Fillet (T).
Rosette weld.

Question 21

Butt weld required penetration:

Answer 21

100% thickness of base material.

Question 22

Fillet weld required penetration:

Answer 22

25-50% thickness of base metal.

Question 23

Primary method of joining heavy steel:

Answer 23

Electric arc welding.

Question 24

What type of application utilizes both lap and rosette welds.

Answer 24

Fishmouth