Materials and Construction

201. High speed steel tools retain their hardness upto a temperature of _________ °C.

1. 500
2. 750
3. 900
4. 1100

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202. Hot working of lead is carried out at

1. 75° C
2. 373° K
3. 150° C
4. Room temperature

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203. How many atoms are there per unit cell in a body centred cubic lattice system?

1. 6
2. 5
3. 3
4. 2

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204. How many molecules per unit cell are there in a face centred cubic lattice?

1. 2
2. 4
3. 6
4. 8

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205. Hydrochloric acid absorber in made of

1. Cast iron
2. Mild steel
3. Karbate
4. Stainless steel

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206. Hydrochloric acid is _________ corrosive to common metals.

1. Least
2. Not
3. Mildly
4. Highly

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207. Hydrochloric acid is stored in a _________ steel vessel.

1. Lead lined
2. Rubber lined
3. Glass lined
4. Stainless

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208. Hydrochloric acid is stored in a _________vessel.

1. Lead lined steel
2. Rubber lined steel
3. Stainless steel
4. Cast iron

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209. Hydrocyanic acid is not shipped in

1. Cast iron vessels
2. Steel cylinders
3. Aluminium containers
4. Monel drums

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210. In a plate type heat exchanger, heat transfer plates are never made of

1. Stainless steel
2. Cast iron
3. Titanium
4. Hastelloy C

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