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Electronic Mechanic
Electronic Mechanic Set-1
Soldering, De-soldering and various switches
19

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

Soldering, De-soldering and various switches MCQ with Answers

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

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

23) What is the result of forced air is blown to cool the joint while soldering?

Solder setting very slowly

Results in dry brittle joint

Disturbs the chemical bonding

Joint becomes mechanically stronger

Answer is:

Results in dry brittle joint

Soldering, De-soldering and various switches MCQ with Answers

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