Chemical Engineering Basics
Powder metallurgy is used to produce

High precision components with complex cavities and sharp features
Components of large size
Porosity free components
Components of such alloys whose constituents do not form alloys readily

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Chemical Engineering Basics
Compression ratio of an I.C. engine is the ratio of the

Pressure after compression to that before compression
None of these
Clearance volume to the volume swept by piston per stroke
Volume of air in cylinder before compression to that after compression

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