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
- 200°C
- 300°C
- 420°C
- 520°C
(Ans:c)
The commonly used flux in brazing is
- Borax
- Rosin
- Lead sulphide
- Zinc chloride
(Ans:a)
Which of the following is function(s) of flux used in brazing?
- Protect surface from oxidation
- Reduce surface tension of filler
- Assist its penetration
- i only
- ii only
- i and ii
- i, ii and iii
(Ans:d)
In soldering the melting point of filler metal is
- below 420°C
- above 420°C
- below 520°C
- above 520°C
(Ans:b)
The composition of soft solder is
- lead-37%, tin-63%
- lead-50%, tin-50%
- lead-63%, tin-37%
- lead-70%, tin-30%
(Ans:a)
The composition of electrician solder is
- lead-37%, tin-63%
- lead-50%, tin-50%
- lead-63%, tin-37%
- lead-70%, tin-30%
(Ans:d)
Which of the following is not true?
- Soft solder – lead-37%, tin-63%
- Medium solder – lead-50%, tin-50%
- Electrician solder – lead-64%, tin-36%
- Plumber’s solder – lead-70%, tin-30%
(Ans:c)