Chemical Engineering Basics
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

Simple cubic
Body centred cubic (bcc)
Hexagonal close, packed (hcp)
Face centred cubic (fcc)

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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% ?

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

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