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Electronic Mechanic
Electronic Mechanic Set-1
Soldering, De-soldering and various switches
18

Soldering, De-soldering and various switches MCQ with Answers

18) 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

Answer is:

Dissolve the oxide layer on the metal surface

Soldering, De-soldering and various switches MCQ with Answers

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Related Soldering, De-soldering and various switches MCQ with Answers

19) 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

Answer is:

18 gauge rosin cored

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

Water

Petrol

Organic flux

Isopropyl alcohol

Answer is:

Isopropyl alcohol

21) What is the effect of over heating on soldering a joint?

Cold joint

Poor wetting

Dull grainy surface

Flux trapped against lead

Answer is:

Dull grainy surface

22) What is the name of defect if the flux is unable to remove the tarnish from the soldered joint?

Cold joint

Poor wetting

Pits and voids

Dull gravity surface

Answer is:

Cold joint

Soldering, De-soldering and various switches MCQ with Answers

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