Bricks MCQ – Building Materials

51. The main disadvantage of concrete blocks used for masonry as Compared to bricks is

  1. lower strength
  2. higher moisture content
  3. more requirement of mortar
  4. shrinkage due to moisture movement
Answer. d

52. The bricks which are extensively used for basic refractories in furnaces are

  1. Chrome bricks
  2. Sillimanite bricks
  3. Magnesite bricks
  4. Fosterite bricks
Answer. c

53. Load applied during the compressive strength test of brick till its failure is at the rate of _______ kg/cm2 per minute.

  1. 100
  2. 10
  3. 140
  4. 160
Answer. c

54. Unit weight of common burnt clay bricks used as building material as per IS : 875 (Part 1) – 1987 is

  1. 1600 to 1920 kg/m3
  2. 700 kg/m3
  3. 2500 kg/m3
  4. 1400 kg/m3
Answer. a

55. The Bureau of Indian Standards (BIS) has classified the common burnt clay bricks on the basis of

  1. compressive strength
  2. size of the brick
  3. water absorption capacity
  4. efflorescence on brick
Answer. a

56. When the deposit of efflorescence is more than 10% but less than 50% of the exposed area of the brick, the presence of efflorescence is

  1. moderate
  2. slight
  3. heavy
  4. serious
Answer. a

57. Consider the following statements:

  1. IS 3583 refers to Burnt Clay Paving Bricks.
  2. IS 5779 refers to Burnt Clay Soling Bricks.
  3. IS 3952 refers to Burnt Clay Hollow Bricks.
  4. IS 2222 refers to Burnt Clay Bricks.

Which of the above statements are correct?

  1. i, ii and iii only
  2. i, ii and iv only
  3. iii and iv only
  4. i, ii, iii and iv
Answer. a

58. Consider the following statements regarding refractory bricks in furnaces:

  1. The furnace is fired at temperatures more than 1700°C.
  2. Silica content in the soil should be less than 40%
  3. Water absorption of bricks should not exceed 10%
  4. Chrome bricks are known as basic bricks.

Which of the above statements are correct?

  1. i and ii only
  2. ii and iv only
  3. i and iii only
  4. iii and iv only
Answer. c

59. Which of the following statements are wholly correct regarding broken-brick aggregate usable in concretes?

  1. Broken-brick aggregate is obtained by crushing waste bricks and it has a density varying between 1000 kg/m3 – 1200 kg/m3
  2. Such aggregate is usable in concrete for foundation in light buildings, floorings and walkways.
  3. Such aggregate may also be used in light-weight reinforced concrete floors.
  1. i and ii only
  2. ii and iii only
  3. i and iii only
  4. i, ii and iii
Answer. d

60. Efflorescence test is conducted for burnt clay bricks to find out the

  1. presence of alkaline substance
  2. hardness
  3. soundness
  4. presence of cracks or holes
Answer. a
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