Soldering And Crimping Flashcards
What are permanent connections?
Crimps
What are repairable connections?
Solder joints
What are Removable connections?
Plugs and sockets
What are the types of solder?
Wire solder
Bar solder
What must you do after soldering a joint?
Wash the active flux off,
To prevent corrosion on the joint
What are the types of soldering iron?
Pace or weller (low voltage)
Solon (mains voltage)
Types of de solder tools?
Wick gun
De solder pullt
How dose a wick gun work?
Copper braid draws away the solder using a capillary action
How dose a de solder pullt work?
Draws solder up the tube using a vacuum
What’s the purpose of a heat sink?
To protect components from to much heat whilst soldering or de soldering
What are the 2 types of heat sink?
Simple heat sink
Mated connector
Insulated packing
What are the 6 main soldering faults?
Dry joints Insulation damage Excess flux Spikes to little solder Excessive solder
What’s the effect of having a dry joint?
Dry joints can overheat and cause high resistance
What causes spikes in the solder?
Stroking the solder
What should a correctly solder joint have?
A bright smooth finish
When talking about wires, what would 14/0.25 mean?
14 strands each with a diameter of 0.25mm
What should you ensure when replacing cables?
Replace by one of identical type
Indentical specification, current rating
Or approved / authorised alternative
Why is it necessary to remove the outer insulation of a cable?
To enable a good electrical connection is made
What are the 4 types of snipping tools?
Diagonal nippers
Klippon wire strippers
Semi automatic wire strippers
Stanley knife (not approved stripping tool)
What are diagonal nippers used on?
Inner and outer insulation, of all thicknesses
What are klippon wire strippers used on?
PVC cables 4.5mm to 25mm
What are the Pre use checks on the soldering iron?
Check cables and plugs
Condition of iron
Correct operation
What are the dangers of soldering?
Use of fluxes
Fumes
Hot surfaces
Molten solder
What are the 2 types of crimper?
Amp certi-lock Mike roystone (Dubuis)
2 different types of flux?
Active - non active
A low voltage soldering iron tip is pitted, what should you do?
Replace the tip
Why is a heat sink removed?
To help remove heat from the component
How dose solder make a joint?
By alloying the metals together
If you move the component before the joint is cooled will do?
Cause dry joint
How dose a wick gun remove solder?
Convection action
