1811. Sulphur melting pit in the sulphuric acid plant is made of
Lead lined stainless steel
Cast iron
Steel or cement-brick lined
Hard wood
✅ The correct answer is option C.
1814. Steel rods are used in reinforced concrete to increase its __________ strength.
Shear
Tensile
Compressive
None of these
✅ The correct answer is option B.
1817. Nickel is a constituent of
Bronze
Solder
Duralumin
Monel metal
✅ The correct answer is option D.
1820. A metallic alloy in general as compared to their pure metal components is
More corrosion resistant
Having higher melting point
Having lower hardness, reactivity and fusibility
Having lower electrical conductivity
✅ The correct answer is option A.
1822. Graphite is corroded by
Sulphuric acid (10%)
Sea water
Hydrochloric acid
None of these
✅ The correct answer is option D.
1824. The maximum percentage of chromium that can be added to steel is about
12
18
24
30
✅ The correct answer is option B.
1826. Constantan used in thermocouples is an alloy of
Iron & copper
Copper & aluminium
Lead & tin
None of these
✅ The correct answer is option D.
1828. Very high sulphur in pig iron makes
Its casting unsound
Its hard and machinable
Its brittle and malleable
All of the above
✅ The correct answer is option A.
1830. Tin coating on metals is not done by
Spraying
Powder metallurgy
Hot dipping
Electro-deposition
✅ The correct answer is option B.
1832. Carbon supply in pack carburising process is in the form of
Charcoal
Calcium carbide
Hydrocarbon oil
Graphite
✅ The correct answer is option A.