- Chemical Engineering Basics - Section 1
- Chemical Engineering Basics - Section 2
- Chemical Engineering Basics - Section 3
- Chemical Engineering Basics - Section 4
- Chemical Engineering Basics - Section 5
- Chemical Engineering Basics - Section 6
- Chemical Engineering Basics - Section 7
- Chemical Engineering Basics - Section 8
- Chemical Engineering Basics - Section 9
- Chemical Engineering Basics - Section 10
- Chemical Engineering Basics - Section 11
- Chemical Engineering Basics - Section 12
- Chemical Engineering Basics - Section 13
- Chemical Engineering Basics - Section 14
- Chemical Engineering Basics - Section 15
- Chemical Engineering Basics - Section 16
- Chemical Engineering Basics - Section 17
- Chemical Engineering Basics - Section 18
- Chemical Engineering Basics - Section 19
- Chemical Engineering Basics - Section 20
- Chemical Engineering Basics - Section 21
- Chemical Engineering Basics - Section 22
- Chemical Engineering Basics - Section 23
- Chemical Engineering Basics - Section 24
- Chemical Engineering Basics - Section 25
- Chemical Engineering Basics - Section 26
- Chemical Engineering Basics - Section 27
- Chemical Engineering Basics - Section 28


Chemical Engineering Basics - Engineering
Q1: Pick out the correct statement.A Hot worked materials are subjected to annealing to remove internal stresses.
B Annealing of steel hardens it slightly
C Normalising of a material induces stresses.
D Tempering of a material improves ductility & toughness but reducess hardness & brittlenes.
ANS:D - Tempering of a material improves ductility & toughness but reducess hardness & brittlenes. Tempering is a heat treatment process often applied to hardened steel to improve its mechanical properties. When steel is initially hardened, it becomes very hard but also quite brittle. Tempering involves reheating the hardened steel to a temperature below its critical point (lower than the temperature at which it was hardened) and then cooling it, usually in still air or slightly agitated air. During tempering, several changes occur in the steel's microstructure:
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