Is used as an alloying element for both ferrous & non-ferrous alloys
Is paramagnetic below 415° C (its Curie temperature)
Dimagnetic
Has a body centred cubic (bcc) crystal lattice structure
✅ The correct answer is option A.
Materials and Construction MCQs
Which of the following is the most widely used insulating material for steam carray-ing pipelines?
Ceramic fibre blanket
Glass wool and 85% magnesia
Vermiculite
Slag wool
✅ The correct answer is option B.
Glass lined vessels are not used for handling/storing
Dilute H₂SO₄
Dilute HNO₃
Dilute HCl
Hydroflouric acid
✅ The correct answer is option D.
Which of the following metals in not used for coating of the base metal to guard it against corrosion?
Lead
Cadmium
Magnesium
Aluminium
✅ The correct answer is option C.
The main purpose of galvanising iron sheets is to
Harden the surface
Increase its glossiness and lustre
Prevent the action of water
Prevent the action of oxygen
✅ The correct answer is option C.
Addition of nickel to copper improves its
Machinability
Ductility
Strength
Hardness
✅ The correct answer is option D.
White cast iron as compared to grey cast iron is
More durable
Very brittle
Very hard
All of the above
✅ The correct answer is option D.
A bearing metal should not have
Enough plasticity
Low thermal conductivity
Low co-efficient of friction
High toughness
✅ The correct answer is option B.
Percentage of silver in German silver is
5
10
20
0
✅ The correct answer is option D.
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of
Nickel
Copper
Stainless steel
Brass
✅ The correct answer is option B.