11) The electrodes are manufactured in two standard lengths namely

Answer is:

350 mm and 450 mm

Welding MCQ with Answers

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12) The correct colours for oxygen and acetylene hoses are:

Answer is:

Black for oxygen and maroon for acetylene

Explanation:

Black for oxygen hose and maroon for acetylene hose.

The correct colours for oxygen and acetylene hoses are:

13) In an acetylene cylinder, the acetylene is dissolved in

Answer is:

Acetone

Explanation:

Acetylene is normally dissolved in a solvent, typically acetone, at pressures up to 19 barg (275 psig) at 20°C (68°F). The dissolved acetylene is packaged in specially designed cylinders filled with a porous material to prevent voids where gaseous acetylene could collect.