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Mechanical Engineering · Q151

Engineering Materials

Engineering and GATE · Mechanical Engineering · question 151

Q151

The machinability of steel is increased by

A.
Silicon and sulphur
B.
Phosphorous, lead and sulphur
Answer
C.
Sulphur, graphite and aluminium
D.
Phosphorous and aluminium

Answer: Option B

Solution

Answer: Option B
Solution:
Phosphorous, lead and sulphur improves machinability and resistance to corrosion and it intensifies the effects of other alloying elements
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