121. The material widely used for making pendulums of clocks is
stainless steel
high speed steel
heat resisting steel
nickel steel
✅ The correct answer is option D.
Engineering Materials MCQs
122. Iron-carbon alloys containing carbon __________ 4.3% are known as hyper-eutectic cast irons.
equal to
less than
more than
✅ The correct answer is option C.
123. The ability of a material to resist fracture due to high impact loads, is called
strength
stiffness
toughness
brittleness
✅ The correct answer is option C.
124. The property of a material essential for spring materials is
stiffness
ductility
resilience
plasticity
✅ The correct answer is option C.
125. Face centred cubic space lattice is found in gamma-iron, aluminium, copper, lead, silver and nickel.
TRUE
FALSE
✅ The correct answer is option A.
126. The portion of the blast furnace above its widest cross-section is called
hearth
stack
bosh
throat
✅ The correct answer is option B.
127. Which of the following metal shrinks most from molten state to solid state?
Cast iron
Cast steel
Brass
Admirality metal
✅ The correct answer is option D.
128. The steel widely used for motor car crankshafts is
nickel steel
chrome steel
nickel-chrome steel
silicon steel
✅ The correct answer is option B.
129. The main alloying elements high speed steel in order of increasing proportion are
vanadium, chromium, tungsten
tungsten, titanium, vanadium
chromium, titanium, vanadium
tungsten, chromium, ti
✅ The correct answer is option A.
130. When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of
mainly pearlite
mainly ferrite
ferrite and pearlite
pearlite and cementite
✅ The correct answer is option D.