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Study MCQ
Electronics Mechanic
SOLDERING DE SOLDERING AND VARIOUS SWI
Set 5
Set 5
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Q4488
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What is the effect of over heating on soldering a joint?
A
Cold joint
B
Poor wetting
C
Dull grainy surface
D
Flux trapped against lead
Q4489
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What is the name of defect if the flux is unable to remove the tarnish from the soldered joint?
A
Cold joint
B
Poor wetting
C
Pits and voids
D
Dull gravity surface
Q4490
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What is the result of forced air is blown to cool the joint while soldering?
A
Solder setting very slowly
B
Results in dry brittle joint
C
Disturbs the chemical bonding
D
Joint becomes mechanically stronger
Q4491
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What is the effect of shaking the soldered joint while cooling?
A
Flux will not dissolve
B
It will corrode the joint
C
It results in oxidation of solder
D
It disturbs the chemical bonding take place
Q4492
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Why the solvent Iso Propyl Alcohol (IPA) is used on the solder joint?
A
To help the corrosive action
B
Cleaning before soldering the joint
C
To break down the acid within the joint
D
Remove residual flux and prevent corrosion
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