21) Which type of soldering method is used for servicing and repairing work?

Dip soldering

Soldering with a flame

Soldering with soldering gun

Soldering with a soldering iron

Answer is:

Soldering with soldering gun

Soft soldering

Piping and cable soldering work

Soldering miniature components on PCB

Soldering sensitive electric components

Answer is:

Polyamine hardener

Cast resin compound

Bituminous compound

Epoxy cast resin compound

Answer is:

Protect the cable from mechanical injury

Protect the cable from moisture and gases

Protect armouring from atmospheric condition

Protect the metallic sheath against corrosion

Answer is:

Loop test

External growler test

Break down voltage test

Insulation resistance test

Answer is: