Q3 LESSON4 REVIEW

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What is the main criterion for selecting solder?

• Tensile strength

• Melting point

• Conductivity

• Color

Which element is commonly used along with lead in lead alloy solders?

• Silver

• Tin

• Copper

• Zinc

What is the primary reason for the gradual decrease in the use of lead in soldering?

• Increase in cost

• Toxic nature

• Lack of availability

• Better performance

What is the purpose of flux in soldering?

• Increase melting point

• Reduce solderability

• Remove oxidized layers

• Enhance conductivity

Which type of soldering typically results in solder bridging?

• Soft soldering

• Machine soldering

• Hard soldering

• Reflow soldering

What should be done to correct solder bridging?

• Increase solder amount

• Apply more heat

• Remove excess solder

• Ignore it

Excessive solder can lead to:

• Increased conductivity

• Short circuits

• Enhanced adhesion

• Reduced solderability

Solder balls in PCB soldering are caused by:

• Insufficient heat

• Proper flux application

• Correct soldering iron temperature

• Perfect soldering technique