593Mechanical EngineeringMedium
The machinability of steel is increased by________?
Aphosphorous, lead and sulphur
Bsilicon and sulphur
Cnone of the above
Dphosphorous and aluminium
Esulphur, graphite and aluminium
Correct answer
A. phosphorous, lead and sulphur
Explanation
The correct answer is phosphorous, lead and sulphur.