A. Reduces the upper shelf energy
B. Increasing the ductility transition temperature
C. Decreases brittleness
D. Decreases hardness
Related Mcqs:
- Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies - Increasing sulphur content in pig iron tends to make it ________________?
A. Soft
B. Hard
C. Tough
D. Ductile & malleable - With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and _____________ is not affected ?
A. Impact strength
B. Percent elongation
C. Hardness
D. Both B & C - The minimum carbon content in steel should be ____________________ percent for it to respond to a hardening treatment ?
A. 0.2
B. 0.4
C. 0.6
D. 0.8 - Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?
A. 0.01 to 0.10
B. 0.2 to 0.4
C. 0.5 to 0.7
D. 0.8 to 1.0 - Resilience of a bolt can be increased by increasing its __________________?
A. Length
B. Shank diameter
C. Head diameter
D. None of these - In case of brasses, with decreasing zinc percentage and increasing copper percentage, its _____________ increases ?
A. Percentage elongation
B. Brinell hardness
C. Tensile strength
D. All A, B & C - Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part ?
A. Anodising
B. Tempering
C. Carburising
D. Annealing - The specific gravity of coal depends mainly on its __________________ content ?
A. Carbon
B. Volatile matter
C. Ash
D. Moisture - The Al2O3 content of cryolite in Hall-Heroult cell is maintained between _______________ percent ?
A. 2-5
B. 18-20
C. 12-15
D. 6-12
