441. Hydrochloric acid is stored in a __________ steel vessel.
Lead lined
Rubber lined
Glass lined
Stainless
✅ The correct answer is option B.
Materials and Construction MCQs
442. __________ possesses viscoelastic properties.
Cork
Glass
Graphite
Rubber
✅ The correct answer is option D.
443. High speed steel tools retain their hardness upto a temperature of __________ °C.
500
750
900
1100
✅ The correct answer is option C.
444. Which of the following is the softest material?
Quartz
Calcite
Corrundum
Flourite
✅ The correct answer is option B.
445. Concentrated HCl at 30°C can be stored in a vessel made of
PTFE and porcelain
Cast iron and aluminium
Stainless steel and high silicon cast iron
None of these
✅ The correct answer is option A.
446. Work hardening of a material
Decreases its tensile strength
Decreases its ductility
Increases its ductility
Does not affect its ductility
✅ The correct answer is option B.
447. The material of construction of pressure mills used for squeezing out the juice from sugar cane is
Stainless steel
Cast iron
Mild steel
Monel
✅ The correct answer is option B.
448. Dies for wire drawing are generally made of
Mild steel
Stainless steel
Carbides
High carbon steel
✅ The correct answer is option C.
449. Copper is dissolved from its ore by H₂SO₄ in a percolation tank made of
Wood
Stainless steel
Reinforced concrete lined with lead
High silicon iron (14% Si)
✅ The correct answer is option C.
450. Lead alone is not used in storing equipment, because it
Is very costly
Corrodes easily
Is having low creep strength
None of these
✅ The correct answer is option C.