Workshop Technology
The instrument which has all the features of try-square, bevel protractor, rule and scriber, is

Depth gauge micrometer
Outside micrometer
Combination set
Inside micrometer

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Workshop Technology
During hot working of metals

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

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Workshop Technology
The diaphragm moulding machine is used to

Ram the sand harder at the back of the mould and softer on the pattern face
Give uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

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