Dilute HCI
Acetic acid
Concentrated H₂SO₄
None of these
✅ The correct answer is option B.
Materials and Construction MCQs
To improve the machinability of steel, it is generally subjected to
Spheroidising
Tempering
Normalising
Annealing
✅ The correct answer is option A.
Hydrochloric acid is stored in a __________ steel vessel.
Lead lined
Rubber lined
Glass lined
Stainless
✅ The correct answer is option B.
__________ possesses viscoelastic properties.
Cork
Glass
Graphite
Rubber
✅ The correct answer is option D.
High speed steel tools retain their hardness upto a temperature of __________ °C.
500
750
900
1100
✅ The correct answer is option C.
Which of the following is the softest material?
Quartz
Calcite
Corrundum
Flourite
✅ The correct answer is option B.
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.
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.
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.
Dies for wire drawing are generally made of
Mild steel
Stainless steel
Carbides
High carbon steel
✅ The correct answer is option C.