Chemical Engineering Basics
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.

Heat rejection is lower
Maximum temperature is higher
Expansion & compression are isentropic
Combustion is at constant volume

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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
Cutlery, screws, rivets and files
Small punches, broaches reamers and springs
Mandrels, twist drills, small lathe tools and razors

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