Marageing steel
Nimonic alloys
Kanthal wire
Nichrome
✅ The correct answer is option A.
Engineering
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2122. Acetylene gas holder is made of
Copper
Cast iron
Steel
Monel metal
✅ The correct answer is option C.
2123. Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property?
Silicon
Phosphorus
Sulphur
None of these
✅ The correct answer is option A.
2124. Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by
Dilute HC₁
Acetic acid
v
None of these
✅ The correct answer is option B.
2125. Liners of a ball mill are never made of
Lead
Alloy steel
Rubber or ceramic material
Cast iron
✅ The correct answer is option A.
2126. Alpha iron is stable __________ °C.
Above 1403
Upto 910
Above 1800
Between 910 & 1403
✅ The correct answer is option B.
2127. Gunmetal and bronze are not corroded by the action of
Wet chlorine
Synthetic detergent solution
Hydrochloric acid (10%)
Nitric acid (< 25%)
✅ The correct answer is option B.
2128. Wood is corroded by
Hydrochloric acid
SO₂ (dry or wet)
Chlorine (dry or wet)
All of the above
✅ The correct answer is option D.
2129. __________ can replace tungsten in high speed steel,
Chromium
Vanadium
Cobalt
Molybdenum
✅ The correct answer is option D.
2130. Brine (15% concentration) can be stored in a vessel made of
Monel
Karbate
Cast iron
None of these
✅ The correct answer is option A.