201. Mild steel is used for making
Fish plates
Die block
Channels
Drop forging
✅ The correct answer is option C.
Materials and Construction MCQs
202. Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)
Do not require heat treatment for any of its applications
Are used for leaf and coiled springs
Do not have good resilience properties
Is tempered at 850°C
✅ The correct answer is option B.
203. Plasticisers are added to polymers to improve their
Tensile strength
Softness & flexibility
Acid resistance
Alkali resistance
✅ The correct answer is option B.
204. Atmospheric corrosion of metals result from their
Slow oxidation
Fast oxidation
Fast hydration
Slow dehydration
✅ The correct answer is option A.
205. Which of the following is a non-magnetic material?
Cobalt
Zinc
Nickel
None of these
✅ The correct answer is option B.
206. Slow plastic deformation of metals under a constant stress is termed as __________ failure.
Fatigue
Endurance
Creep
None of these
✅ The correct answer is option C.
207. Which of the following is not used as the ceramic material in ‘cermets’?
Silicides
Oxides
Carbides
Nitrides
✅ The correct answer is option D.
208. Bush bearings are made of
Mild steel
Phosphorous bronze
White metal alloys
None of these
✅ The correct answer is option B.
209. 18/8 steel is a/an __________ stainless steel.
Austenitic
Ferritic
Martensitic
None of these
✅ The correct answer is option A.
210. Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its
High strength to weight ratio
Low temperature strength properties
Its ability to be cast, rolled, forged & stamped
High strength and corrosion & oxidation-resistance at elevated temperature
✅ The correct answer is option A.