make the steel tougher and harder
raise the yield point
make the steel ductile and of good bending qualities
all of the above
✅ The correct answer is option C.
Engineering Materials MCQs
Grey cast iron has
carbon in the form of free graphite
high tensile strength
low compressive strength
all of these
✅ The correct answer is option A.
When filing or machining cast iron makes our hands black, then it shows that __________ is present in cast iron.
cementite
free graphite
✅ The correct answer is option B.
In induction hardening, the depth of hardening is controlled by controlling the voltage.
Correct
Incorrect
✅ The correct answer is option A.
Aluminium has low density and addition of silicon improves its fluidity and therefore, its castability.
Correct
Incorrect
✅ The correct answer is option A.
Which of the following is an amorphous material?
Mica
Silver
Lead
Glass
✅ The correct answer is option D.
18/8 stainless steel consists of
18% nickel and 8% chromium
18% chromium and 8% nickel
18% nickel and 18% chromium
8% nickel and 8% chrom
✅ The correct answer is option B.
Macro-structure of a material is, generally, examined by
naked eye
optical microscope
metallurgical microscope
X-ray techniques
✅ The correct answer is option A.
The casting ability of aluminium increases when __________ is added to aluminium.
copper
magnesium
silicon
lead and bismuth
✅ The correct answer is option C.
White cast iron has
carbon in the form of carbide
low tensile strength
high compressive strength
all of these
✅ The correct answer is option D.