Materials and Construction

251. Mild steel is

1. A low carbon steel (0.05 to 0.3% carbon)
2. Highly resistant to corrosion (as much as stainless steel)
3. A high carbon steel (0.5 to 1.5% carbon)
4. Very poor in strength & ductility

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252. Mild steel is a/an _________ steel.

1. Low carbon
2. Medium carbon
3. High carbon
4. High alloy

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253. Mild steel is used for making

1. Fish plates
2. Die block
3. Channels
4. Drop forging

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254. Mild steel storage vessels are suitable for the storage of

1. Anhydrous ammonia
2. Fatty acids
3. Hydrochloric acid (95%)
4. Sulphuric acid (25%)

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255. Mixing vessel used for the chlorination of methane to produce methyl chloride is made of

1. Copper
2. Cast iron
3. Aluminium
4. High carbon steel

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256. Molten phthalic anhydride is stored in a/an _________ vessel.

1. Aluminium
2. Nickel clad steel
3. Lead lined steel
4. Glass lined steel

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257. Molybdenum steels containing 0.15 to 0.40% molybdenum

1. Are prone to temper brittleness
2. Are used for automobile parts like gears, axle, shaft, bearings etc.
3. Have very poor fatigue resistance
4. Do not contain nickel or chromium or both

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258. Monel alloy is

1. The costliest of all the alloys of nickel
2. Not suitable for making kitchen utensils
3. Used for making steam valves and turbine blades as it resists steam attack at high temperature
4. Not used in cast and wrought forms

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259. Monel metal is an alloy of

1. Molybdenum and nickel
2. Nickel and copper
3. Molybdenum and aluminium
4. Molybdenum and zinc

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260. Most common stainless steel type 316, which is highly resistant to corrosion contains

1. 16-13% Cr 10-14% Ni and 2-3% Mo
2. 20-22% Cr, and 8-10% Ni
3. 2-4% Cr, 22% NI and 2-4% Mo
4. None of these

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