Building Materials

201. Formula for quick lime, is

  1. CaCO3
  2. Ca(OH)2
  3. CO3CO2
  4. None to these

Correct answer: (A)
CaCO3

202. The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called

  1. Cementation process
  2. Crucible process
  3. Bessemer process
  4. Open hearth process

Correct answer: (A)
Cementation process

203. The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is

  1. 1
  2. 2
  3. 3
  4. 4

Correct answer: (B)
2

204. Which one of the following polymers is obtained from condensation polymerization?

  1. Phenol formaldehyde
  2. Carbamide
  3. Melamine-formaldehyde
  4. All of these

Correct answer: (D)
All of these

205. The portion of a brick cut to form angles other than right angles in plan, is known as

  1. Queen closer
  2. King closer
  3. Closer
  4. Squint brick

Correct answer: (D)
Squint brick

206. The moisture content in a well seasoned timber is

  1. 4 % to 6 %
  2. 10 % to 12 %
  3. 15 % to 20 %
  4. 1

Correct answer: (B)
10 % to 12 %

207. The cement becomes unsound by the presence of excess

  1. Sulphur
  2. Magnesia
  3. Lime
  4. All of these

Correct answer: (D)
All of these

208. For one cubic metre of brick masonry, number of bricks required, is

  1. 400
  2. 425
  3. 450
  4. 500

Correct answer: (D)
500

209. Rapid hardening cement contains

  1. Tri-calcium silicate
  2. Tri-calcium aluminate
  3. Tetra-calcium alumino-ferrite
  4. Di-calcium silicate

Correct answer: (A)
Tri-calcium silicate

210. In order of increasing percentage of silica, the correct sequence is

  1. Sandy clay, calcareous clay, pure clay
  2. Calcareous clay, pure clay, sandy clay
  3. Pure clay, sandy clay, calcareous clay
  4. None of these

Correct answer: (B)
Calcareous clay, pure clay, sandy clay

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