Chapter 4 - Aircraft Welding - Oral Questions

Question 1

Name the three types of welding

Answer 1

Gas, electric arc, electric resistance

Question 2

What are some advantages of shielded gas arc welding?

Answer 2

The weld is stronger, more ductile, and more corrosion resistant

Question 3

Which method of welding is less likely to cause buckling or warping of thin metal sheets?

Answer 3

Electric arc (TIG) welding

Question 4

What is the purpose of shielding an arc weld with an inert gas?

Answer 4

The gas prevents oxygen or nitrogen from contaminating the weld

Question 5

What is a common method of controlling expansion when welding a joint?

Answer 5

Place tack welds along the length of the joint

Question 6

What is the effect of inadequate penetration on a weld?

Answer 6

Weld will be weak

Question 7

What is the purpose of the flux used with brazing and silver soldering

Answer 7

The flux cleans the base metal by removing any oxide film

Question 8

What type of flame is used when torch brazing or silver soldering?

Answer 8

Neutral flame

Question 9

What must be done to a soldering iron tip to increase the amount of heat transferred from the tip to the work?

Answer 9

Tip must be cleaned of contaminates and tinned

Question 10

What is the preferred method for welding aluminum?

Answer 10

Tungsten Inert Gas (TIG)

Question 11

What is the preferred method of welding magnesium?

Answer 11

TIG

Question 12

What precautions must be observed in order to weld titanium?

Answer 12

All traces of oxygen and nitrogen must be kept away from the weld area

Question 13

Describe one type of repair that could be made to a dented steel tube cluster joint

Answer 13

A formed steel patch plate could be welded over the damaged area

Question 14

How can a soft flame be obtained without reducing the heat output of the torch?

Answer 14

Use a larger tip and adjust the gas pressure accordingly

Question 15

What factors determine the amount of heat delivered by a gas welding torch?

Answer 15

The size of the torch tip and gas pressure

Question 16

When an oxyacetylene torch is extinguished, which valve is turned off first?

Answer 16

Acetylene first

Question 17

When a gas welding project is completed, what safety precautions should be accomplished?

Answer 17

All the valves turned off and the pressures relieved

Question 18

What should be done to a heat treated aluminum part after welded repairs are completed?

Answer 18

The part must be re heat-treated

Question 19

Welding magnesium can create a serious safety hazard. What is the nature of this hazard?

Answer 19

Magnesium burns with a very hot flame that is very hard to extinguish.

Question 20

What technique might be used to enable a tight-fitting inner sleeve to be inserted into a tubular repair?

Answer 20

The inner tube could be chilled with dry ice or in a freezer while the outer tube could be heated slightly with a torch.