stainless steel
high speed steel
invar
heat resisting steel
✅ The correct answer is option C.
Engineering Materials MCQs
18-4-1 high speed steel contains
vanadium 4%, chromium 18% and tungsten 1%
vanadium 1%, chromium 4% and tungsten 18%
vanadium 18%, chromium 1% and tungsten 4%
none of the above
✅ The correct answer is option B.
The addition of manganese to aluminium improves corrosion resistance.
Correct
Incorrect
✅ The correct answer is option A.
The addition of which of the following improves machining of copper?
Sulphur
Vanadium
Tin
Zinc
✅ The correct answer is option A.
Quenching is not necessary when hardening is done by
case hardening
flame hardening
nitriding
any one of these
✅ The correct answer is option C.
German silver contains
70% copper and 30% zinc
60% copper and 40% zinc
59% copper, 40% zinc and 1% tin
60.45% copper, 35.2% z
✅ The correct answer is option D.
Muntz metal (Yellow brass) contains
70% copper and 30% zinc
60% copper and 40% zinc
59% copper, 40% zinc and 1% tin
60.45% copper, 35.2% z
✅ The correct answer is option B.
A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel.
TRUE
FALSE
✅ The correct answer is option A.
The ductility is the property of a material due to which it
can be drawn into wires
breaks with little permanent distortion
can be rolled or hammered into thin sheets
can resist fracture du
✅ The correct answer is option A.
In induction hardening __________ is high.
current
voltage
frequency
temperature
✅ The correct answer is option C.