2158. For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
Stainless steel
Cast iron
Aluminium
Nickel
✅ The correct answer is option B.
2161. Gas holder of a gobar (cowdung) gas plant is made of
Molybdenum stainless steel
Tin
Mild steel
Aluminium
✅ The correct answer is option C.
2164. 18/8 stainless steel means, that it contains
18% chromium and 8% nickel
18% chromium and 8% molybdenum
18% nickel and 8% chromium
18% molybdenum and 8% chromium
✅ The correct answer is option A.
2167. Rubber lined vessels are corroded by the action of
Aqua regia
Chloroform
Sulphuric acid (95%)
All of the above
✅ The correct answer is option D.
2169. The chlorinator used in the manufacture of DDT is made of
Glass
Glass lined steel
Teflon
Bakelite
✅ The correct answer is option B.
2171. Pipes for bi-cycle frames are made of __________ steel.
Hot rolled
Chrome carbon
Cold rolled
Stainless
✅ The correct answer is option C.
2173. Nickel and molybdenum are the basic constituents of
Hastealloy
German silver
Inconel
Solder
✅ The correct answer is option A.
2175. Balls in a ball mill are usually made of
Steel
Cast iron
Stainless steel
Bronze
✅ The correct answer is option A.
2177. __________ iron is produced, when molten pig iron is allowed to cool gradually.
White cast
Grey cast
Wrought
None of these
✅ The correct answer is option B.
2179. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called
Constantan
Kanthal
Chromel
German silver
✅ The correct answer is option A.