1734. The heat treatment process to which castings and the steel balls produced by cold heading are subjected is
Tempering
Normalising
Annealing
None of these
✅ The correct answer is option B.
1737. Water gas generator is made of
Carbon steel-brick lined
Stainless steel-lead lined
Cast iron
High carbon steel-procelain lined
✅ The correct answer is option A.
1740. Ball bearings are generally made of
Plain carbon steel
Chrome carbon steel
Stainless steel
Malleable cast iron
✅ The correct answer is option B.
1742. Most suitable material of construction for the storage of concentrated nitric acid is
Cast iron
Monel
Karbate
Aluminium or chromium alloys (Cr > 18% for cold acid)
✅ The correct answer is option D.
1744. Maximum carbon content in cast iron is __________ percent.
3.8
5.2
4.8
4.3
✅ The correct answer is option D.
1746. Which of the following contains maximum percentage of carbon?
Boiler plate steel
Rail steel
Saws for cutting steel
Railway spring steel
✅ The correct answer is option C.
1748. Presence of manganese in alloy steel improves its
Corrosion resistance
Cutting ability
Abrasion resistance & toughness
Elasticity & creep resistance
✅ The correct answer is option C.
1750. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower
Price
Corrosion resistance
Thermal conductivity
Abundant availability
✅ The correct answer is option D.
1752. Clock pendulums are usually made of __________ steel.
High speed
Stainless
Heat resisting
None of these
✅ The correct answer is option D.
1754. In the kraft (sulphate) process for the paper manufacture, the digestor is made of
Cast iron
Stainless steel
Karbate carbon
Wrought iron
✅ The correct answer is option B.