Soldering

Question 1

What is the purpose of Solder?

Answer 1

Used for joining metals by flowing an alloy, solder, between the surfaces to be joined

Question 2

What is the purpose of Flux?

Answer 2

Used to provide a chemically clean surface and allows the solder to flow more rapidly

Question 3

If undertaking soldering indoors, what must be made available prior to work commencing?

Answer 3

local exhaust ventilation must be available

Question 4

How are electric soldering irons classified?

Answer 4

• Voltage

- Wattage

Question 5

If using a gas torch what precautions should be taken?

Answer 5

• Ensure the correct type of fire extinguisher is available
• The gas must not be ignited within 15m of aircraft, MT vehicles, or inflammable stores
• When lit, but not in use, the flame must be directed toward a metal or brick background.
• In field conditions where the aforementioned is not available, flame is to be directed towards a safe area away from personnel.

Question 6

What are the common causes of Dry Joints?

Answer 6

• Dirty surfaces
• Iron too hot
• Iron too cool
• Excessive or wrong type of flux
• Excessive or wrong type of solder
• Surfaces not brought firmly together