1999Mechanical EngineeringMedium
Machining properties of steel are improved by adding________?
Achromium, nickel
Bsulphur, lead, phosphorous
Cvanadium, aluminium
Dsilicon, aluminium, titanium
Elubricants
Correct answer
B. sulphur, lead, phosphorous
Explanation
The correct answer is sulphur, lead, phosphorous.