471. A suitable material of construction to use with fuming sulphuric acid is
Carbon steel
Stainless steel type 304
Nickel
Monel
✅ The correct answer is option D.
Materials and Construction MCQs
472. Which of the following is produced by condensation polymerisation?
Bakelite
Polythene
Poly vinyl chloride
Polystyrene
✅ The correct answer is option A.
473. Coke oven walls are lined with __________ bricks.
Silica
Tar-dolomite
Low thermal conductivity
Fire clay
✅ The correct answer is option A.
474. Nickel and copper are the basic constituents of
Hastelloy
Monel metal
German silver
Inconel
✅ The correct answer is option B.
475. The softest material just next to talc in the Mho’s scale is
Quartz
Gypsum
Feldspar
Fluorite
✅ The correct answer is option B.
476. Nickel as a material of construction
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.
477. 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.
478. Glass lined vessels are not used for handling/storing
Dilute H₂SO₄
Dilute HNO₃
Dilute HCl
Hydroflouric acid
✅ The correct answer is option D.
479. 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.
480. 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.