Chemical Engineering Basics
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.

None of these
Shows inversion of solubility
Increases
Decreases

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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
Volume of air in cylinder before compression to that after 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% ?

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

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