Which property is improved by the drawing process?

A$.$ Ductility

B$.$ Hardness

C$.$ Brittleness

D$.$ Porosity

Which of the following is NOT a type of drawing process?

A$.$ Tube drawing

B$.$ Wire drawing

C$.$ Sheet drawing

D$.$ Bar drawing

A two$-$part sand mould must contain a riser. What is the primary function of the riser?

A$.$ To enable the easy removal of the core without destruction of the cope when the mould is raised

B$.$ To feed the mould cavity during pouring

C$.$ To perform the function of the runners within the vertical section of the mould

D$.$ To enable the flow of the melted metal through the actual mould until the solidification of the casting is complete

The cooling time of the riser has to be

A$.$ Shorter by $25\%$ than the cooling time of the mold

B$.$ Same as the one of the mold

C$.$ Longer by $30\%$ than the cooling time of the mold

D$.$ There is no such rule: risers feed the shrinkage of the mold

The typical oxyacetylene flame uses the two gases in a determined proportion to achieve a neutral flame. However, for copper welding, for an example, the oxidizing flame is used while for highcarbon steels, the carburizing flame is used. The three types of flames exhibit different range of temperatures. Which of the below sequence is in order of increasing temperature?

A$.$ Neutral, Carburizing, Oxidizing

B$.$ Neutral, Oxidizing, Carburizing

C$.$ Oxidizing, Neutral, Carburizing

D$.$ Carburizing, Neutral, Oxidizing

In sheet metal forming, springback occurs when:

A$.$ The material retains its bent shape after forming

B$.$ The material attempts to return to its original shape after bending

C$.$ The material breaks during forming

D$.$ The material becomes more ductile during bending

Which sheet metal forming process is used to punch holes in a workpiece?

A$.$ Stamping

B$.$ Bending

C$.$ Shearing

pep drawing

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