SOLDERING DE SOLDERING AND VARIOUS SWI - Practice Mode

1) Which soldering instrument has hot air blowing facility?

Soldering iron Soldering station Wave soldering machine Temperature controlled soldering iron

Correct Answer: Soldering station

2) What is produced by the power supply connected soldering iron?

Fire Heat Cool air Water vapour

Correct Answer: Heat

3) What is the purpose of flux in soldering electronic circuit components?

Form the oxide layer Reduce the solder cooling time Increase the melting temperature of solder Dissolve the oxide layer on the metal surface

Correct Answer: Dissolve the oxide layer on the metal surface

4) Which gauge number of rosin-cored solder is suitable for soldering medium sized joints?

16 gauge rosin cored 18 gauge rosin cored 22 gauge rosin cored 24 gauge rosin cored

Correct Answer: 18 gauge rosin cored

5) How the flux residue is removed after soldering a joint?

Water Petrol Organic flux Isopropyl alcohol

Correct Answer: Isopropyl alcohol

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