Multiple Choice Questions (MCQ) on Soldering and Brazing

 

Multiple Choice Questions (MCQ) on Soldering and Brazing

 

The filler metal used in brazing has melting point of above

  1. 200°C
  2. 300°C
  3. 420°C
  4. 520°C

(Ans:c)

 

 

The commonly used flux in brazing is

  1. Borax
  2. Rosin
  3. Lead sulphide
  4. Zinc chloride

(Ans:a)

 

 

Which of the following is function(s) of flux used in brazing?

  1. Protect surface from oxidation
  2. Reduce surface tension of filler
  3. Assist its penetration
  1. i only
  2. ii only
  3. i and ii
  4. i, ii and iii

(Ans:d)

 

 

In soldering the melting point of filler metal is

  1. below 420°C
  2. above 420°C
  3. below 520°C
  4. above 520°C

(Ans:b)

 

 

The composition of soft solder is

  1. lead-37%, tin-63%
  2. lead-50%, tin-50%
  3. lead-63%, tin-37%
  4. lead-70%, tin-30%

(Ans:a)

 

 

The composition of electrician solder is

  1. lead-37%, tin-63%
  2. lead-50%, tin-50%
  3. lead-63%, tin-37%
  4. lead-70%, tin-30%

(Ans:d)

 

 

Which of the following is not true?

  1. Soft solder – lead-37%, tin-63%
  2. Medium solder – lead-50%, tin-50%
  3. Electrician solder – lead-64%, tin-36%
  4. Plumber’s solder – lead-70%, tin-30%

(Ans:c)