Workshop Technology
A hacksaw blade cuts on the

Forward stroke
Both forward and return strokes
Return stroke
Cutting depends upon the direction of force

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Workshop Technology
During hot working of metals

Mechanical properties are improved due to refinement of grains
Porosity of the metal is largely eliminated
All of the listed here
Grain structure of the metal is refined

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Workshop Technology
Shift is a casting defect which

Occurs as sand patches on the upper surface of a casting
Results in a mismatching of the top and bottom parts of a casting
Occurs near the ingates as rough lumps on the surface of a casting
Results in general enlargement of a casting

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