Bricks MCQ – Building Materials

71. The compressive strength of perforated bricks should not be less than

  1. 4 MN/m2
  2. 5 MN/m2
  3. 6 MN/m2
  4. 7 MN/m2
Answer. d

72. The bricks after moulding should be dried in

  1. Open-air
  2. Sun for 3 to 8 days
  3. Air for 3 to 8 days but not in the sun
  4. Hot air for 3 days
Answer. c

73. Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning.

  1. Alumina
  2. Silica
  3. Lime
  4. Alkalies
Answer. c

74. Presence of which of the following is responsible for imparting yellow tint to bricks?

  1. Alumina
  2. Silica
  3. Magnesia
  4. Lime
Answer. c

75. Brick containing large proportion of soluble salts liable to become patches of white deposit are called as

  1. Bloating
  2. Efflorescences
  3. Under burning
  4. Laminates
Answer. b

76. Why are bricks soaked in water before using in brick masonry?

  1. for removing dust
  2. for reducing air voids
  3. for preventing depletion of moisture from mortar
  4. for reducing efflorescence
Answer. c

77. Consider the following stages in the manufacturing of bricks

  1. Weathering
  2. Moulding
  3. Tempering

The correct sequence of these stages in the manufacturing of bricks

  1. i, ii, iii
  2. i, iii, ii
  3. iii, ii, i
  4. ii, iii, i
Answer. b

78. As per Indian standard code 1077, the burnt clay building bricks having compressive strength less than ________ N/mm2 are known as common burnt clay bricks.

  1. 40
  2. 30
  3. 12.5
  4. 3.5
Answer. a

79. Pallet board is used

  1. to make frog in the brick
  2. to mount the mould
  3. for table moulding of brick
  4. none of the above
Answer. c

80. The compressive strength of heavy duty bricks should be more than

  1. 40 N/mm2
  2. 20 N/mm2
  3. 5 N/mm2
  4. 3.5 N/mm2
Answer. a
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