WELDING - Practice Mode

1) Which acid is used as a flux for stainless steel in soldering?

Hydrochloric acid Nitric acid Phosphoric acid Sulphuric acid

Correct Answer: Phosphoric acid

2) Which flux is used in iron and steel while brazing?

Mixture of 70% borax powder with 30% boric acid Mixture of 75% borax powder with 25% boric acid Mixture of 80% borax powder with 20% boric acid Mixture of 85% borax powder with 15% boric acid

Correct Answer: Mixture of 75% borax powder with 25% boric acid

3) What is the name of brazing if parts to be brazed are submerged in a molten or chemical both?

Induction brazing Dip brazing Furnace brazing Torch brazing

Correct Answer: Dip brazing

4) Which one is closed first while shutdown oxy-acetylene plant?

Oxygen cylinder valve closed first Acetylene cylinder valve closed first Blow pipe oxygen valve closed first Blow pipe actylene valve closed first

Correct Answer: Acetylene cylinder valve closed first

5) What is the angle of blow pipe held in right ward welding?

Blow pipe held at an angle of 40 Degree- 50 Degree Blow pipe held at an angle of 30 Degree- 40 Degree Blow pipe held at an angle of 20 Degree- 30 Degree Blow pipe held at an angle of 10 Degree- 20 Degree

Correct Answer: Blow pipe held at an angle of 40 Degree- 50 Degree

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