381. Aqueous nitric acid is stored in __________ vessel.
Plain carbon steel
Stainless steel
Cast iron
Thermosetting plastic material
✅ The correct answer is option C.
Materials and Construction MCQs
382. Spray dryer for evaporating milk to produce milk powder is made of
Lead lined steel
Stainless steel
Aluminium
Cast iron
✅ The correct answer is option B.
383. Interchain forces are the weakest in case of
Plastics
Fibres
Elastomers
Both rubber & elastomers
✅ The correct answer is option D.
384. Platinum and silver are corroded by
Caustic soda solution
Phosphoric acid
Sulphuric acid (10%)
None of these
✅ The correct answer is option D.
385. A steel alloy containing 36% nickel is called __________ , which has a zero co- efficient of expansion.
Austenitic stainless steel
Heat resisting steel
Invar
High speed steel
✅ The correct answer is option C.
386. Common house hold glass (i.e., soda-lime glass) is a/an __________ material.
Fully crystalline
Partly crystalline
Amorphous
None of these
✅ The correct answer is option B.
387. In a plate type heat exchanger, heat transfer plates are never made of
Stainless steel
Cast iron
Titanium
Hastealloy C
✅ The correct answer is option B.
388. The specific gravity of coal depends mainly on its __________ content.
Carbon
Volatile matter
Ash
Moisture
✅ The correct answer is option C.
389. In SO₃ absorber (Contact Process), packing material used is of
Cast iron
Chemical stoneware
Karbate
Mild steel
✅ The correct answer is option B.
390. Tin in its pure form is used for making
Cans for food packing
Collapsible tubes for toilet preparations
Foil for wrapping cheese
All of the above
✅ The correct answer is option D.