91. Phosphorus is added in low carbon steels to raise its yield point.
TRUE
FALSE
✅ The correct answer is option A.
Engineering Materials MCQs
92. The silicon steel is widely used for
connecting rods
cutting tools
generators and transformers in the form of laminated cores
motor car crankshafts
✅ The correct answer is option C.
93. The property of a material necessary for forgings, in stamping images on coins and in ornamental work, is
elasticity
plasticity
ductility
malleability
✅ The correct answer is option B.
94. The process in which carbon and nitrogen both are absorbed by the metal surface to get it hardened is known as
carburising
cyaniding
flame hardening
induction hardening
✅ The correct answer is option B.
95. The type of space lattice found in alpha-iron is
face centred cubic space lattice
body centred cubic space lattice
close packed hexagonal space lattice
none of these
✅ The correct answer is option B.
96. Ball bearings are, usually, made from
low carbon steel
high carbon steel
medium carbon steel
chrome steel
✅ The correct answer is option D.
97. A steel is heated at about 875° C where the structure consists of entirely austenite. It is then cooled suddenly at a temperature of about 250° C to 525° C. This process of heat treatment is known as
normalising
annealing
austempering
martempering
✅ The correct answer is option C.
98. A coarse grained steel
is less tough and has a greater tendency to distort during heat treatment
is more ductile and has a less tendency to distort during heat treatment
is less tough and has a less tendency to distort during heat treatment
is more ductile and ha
✅ The correct answer is option A.
99. Phosphor bronze has
high resistance to corrosion
good wearing qualities and high elasticity
valuable cold working property
all of these
✅ The correct answer is option B.
100. The acidic bessemer process is suitable for producing steel from pig iron containing large quantities of phosphorus.
Correct
Incorrect
✅ The correct answer is option B.