Building Materials

341. Bitumen in

  1. Solid state, is called asphalt
  2. Semi fluid state, is called mineral tar
  3. Fluid state, is called petroleum
  4. All the above

Correct answer: (D)
All the above

342. Varnish is a transparent or semi-transparent solution of resinous substances in

  1. Alcohol
  2. Linseed
  3. Turpentine
  4. All the above

Correct answer: (D)
All the above

343. Refractory bricks are used for

  1. Retaining walls
  2. Columns
  3. Piers
  4. Combustion chambers

Correct answer: (D)
Combustion chambers

344. Minimum required water cement ratio for a workable concrete, is

  1. 0.30
  2. 0.40
  3. 0.50
  4. 0.60

Correct answer: (B)
0.40

345. Minimum of 40% of iron, is available in

  1. Magnetite
  2. Red haematite
  3. Limonite
  4. Black band

Correct answer: (D)
Black band

346. Portland pozzolana cement possesses

  1. Higher resistance to chemical attack
  2. Lower heat of hydration
  3. Lower shrinkage on drying
  4. All the above

Correct answer: (D)
All the above

347. Dextrin is

  1. Animal glue
  2. Starch glue
  3. Albumin glue
  4. Rubber based adhesive

Correct answer: (D)
Rubber based adhesive

348. Mastic asphalt is normally used for

  1. Sound insulation
  2. Water proofing
  3. Fire proofing
  4. None to these

Correct answer: (B)
Water proofing

349. The steel which contains fissures and cavities, is manufactured by

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

Correct answer: (A)
Cementation process

350. Based on flow quality, the sequence of pipes is

  1. A.C. pipes, G.I. pipes, C.I. pipes, PVC pipes
  2. C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes
  3. C.I. pipes, G.I. pipes, PVC pipes, A.C. pipes
  4. None of these

Correct answer: (B)
C.I. pipes, G.I. pipes, A.C. pipes, PVC pipes

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