1761. Softening of hardned steel is done by its
Normalising
Tempering
Annealing
Carburising
✅ The correct answer is option B.
1763. Anodic material used for the cathodic protection of underground buried steel pipeline is
Nickel or copper
Zinc or magnesium
Bronze
Brass
✅ The correct answer is option B.
1765. Molten phthalic anhydride is stored in a/an __________ vessel.
Aluminium
Nickel clad steel
Lead lined steel
Glass lined steel
✅ The correct answer is option A.
1767. Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress.
Ultimate
Yield point
Proof
None of these
✅ The correct answer is option C.
1769. Nitriding of steel is done (in electric furnace) at __________ °C.
510
1720
2210
910
✅ The correct answer is option A.
1772. The most commonly used resin for making reinforced plastic is
Unsaturated polyester
Polypropylene
Polyurathane
Nylon-6
✅ The correct answer is option A.
1775. The ability of a material to offer resistance to scratching or indentation is a measure of its
Brittleness
Toughness
Hardness
Resilience
✅ The correct answer is option C.
1778. Lead lined equipments & vessels are suitable for handling
Hydrochloric acid (10%)
Nitric acid
Sulphuric acid upto 60°C
All of the above
✅ The correct answer is option C.
1781. Maximum permissible sulphur content in steel is __________ percent.
0.015
0.055
0.505
0.805
✅ The correct answer is option B.
1784. Cast iron compared to steel is better in
Ductility
Fluidity & castability
Strength
Malleability
✅ The correct answer is option B.