Slow oxidation
Fast oxidation
Fast hydration
Slow dehydration
✅ The correct answer is option A.
Materials and Construction MCQs
Which of the following is a non-magnetic material?
Cobalt
Zinc
Nickel
None of these
✅ The correct answer is option B.
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.
Which of the following is not used as the ceramic material in ‘cermets’?
Silicides
Oxides
Carbides
Nitrides
✅ The correct answer is option D.
Bush bearings are made of
Mild steel
Phosphorous bronze
White metal alloys
None of these
✅ The correct answer is option B.
18/8 steel is a/an __________ stainless steel.
Austenitic
Ferritic
Martensitic
None of these
✅ The correct answer is option A.
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.
Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.
High silicon iron, Kel-F and teflon
Tin and wood
Silicone rubber
Stainless steel
✅ The correct answer is option A.
Thermosetting resins are those polymers, which
Do not increase in plasticity with rise in temperature
Allow slip to occur between molecules
Do not take on a permanent set
None of these
✅ The correct answer is option A.
Presence of cobalt in steel improves its
Cutting ability
Corrosion resistance
Tensile strength
None of these
✅ The correct answer is option A.