Lesson 2 pre-test

1. Why is cleaning of surface and edges of metal so important?

• It provides good appearance of the cut material

• It is given in the instruction.

• Dirt and other substances are detrimental to weld quality.

• It makes it easy to fit-up joint.

1. what tool is used to easily remove metal scales, old paints and rust.

• Grinder

• Scraper

• Chipping hammer

• Metal sand paper

Why is an air tight fit-up necessary for Tee-joint preparation?

• Dirt or contaminant will not stick

• Gas pockets associated with unfit fit-up are avoided.

• Rusting of joint is avoided.

• None of the above

Beveled joint is considered “critical” in the category of weld. This means that:

• Weld joint is necessary for radiography

• Weld joint is for visual

• Weld joint needs no inspection

• All of the above

Root face of beveled joint will not exceed a maximum of

• 3 mm .

• 5 mm

• 2 mm

• 6 mm