3. Ask questions of 4 different types:1) Ask General questions to

3. Ask questions of 4 different types:

1) Ask General questions to the sentences:

a) Drawing consists of pulling metal through a die.

b) Finally the edges are sheared off to give the final dimensions.

c) The metal is stretched just beyond its yield point (2 to 4 percent strain) in order to retain the new shape.

d) Bending can be done by pressing between two dies.

2. Ask Alternative questions to the sentences:

a) Products may have a complex cross section.

b) The most common rolled product is sheet.

c) Density is measured in kilograms per cubic metre.

d) Heat is lost by conduction through the base metal.

3. Ask Special questions to the sentences:

a) Resistance welding is widely employed in many fields of sheet metal or wire manufacturing .

b) In 1896 Hall in America and Heroult in France discovered a molten solution capable of yielding aluminium under electrolyses.

c) Silica dissolved during the extraction process must be eliminated from the solution.

d) The processes of welding can be divided into two main groups - pressure welding and heat welding.

4. Ask Disjunctive questions to the sentences:

a) Upsetting involves a flow of the metal back upon itself.

b) Such inclusions can be avoided by proper manufacturing procedures.

c) Welding processes are classified according to the sources of heat and pressure used.

d) Fusion welding is more effective with alternating current.

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