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

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

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Chemical Engineering Basics
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?

Forgings like can shaft, structural steel plate, threading dies and drawing dies
Mandrels, twist drills, small lathe tools and razors
Small punches, broaches reamers and springs
Cutlery, screws, rivets and files

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