Civil Engineering Practice - Building Material & Const. - Question Bank - Set-3

 

If you are preparing for any competitive exams like UPSC IES, GATE, SSC JE, State PSC, etc. or want to check your knowledge about any particular subject of Civil Engineering then solving MCQ's can be the best option. In this way you can also know your weakness about particular section of the subject. 

MULTIPLE CHOICE QUESTIONS

Level - Beginner (Ideal for SSC JE, State PSC and other Small Level Exams

51. The impurity not desirable in the soil used for brick formation is

(a) Alkali

(b) Kankar

(c) Both (a) and (b) above

(d) None of the above

 

52. Red colour is imparced to bricks due to

(a) Iron oxide

(b) Lime

(c) Silica

(d) Magnesia

53. The weight of common bricks varies from

(a) 1200 to 1400 kg/m²

(b) 1400 to 1600 kg/cm²

(c) 1600 to 1920 kg/m³

(d) 2000 kg/m³

 

54. The number of bricks required per cubic metre of brick masonry is

(a) 400

(b) 450

(c) 500

(d) 550

 

55. The crushing strength of a first class brick is

(a) 30 kg/cm²

(b) 55 kg/cm²

(c) 75 kg/cm²

(d) 105 kg/cm²

 

56. Fire bricks are used to

(a) Increase heat flow

(b) Decrease heat flow

(c) Reflect heat

(d) Protect building against lightening

 

57. The ingredient of the brick earth which enables the brick to retain shape is

(a) Alumina

(b) Silica

(c) Iron oxide

(d) magnesia

 

58. Percentage of silica in a good brick earth lies between

(a) 10 - 20%

(b) 20 - 40%

(c) 50 - 60%

(d) None of the above

 

59. The percentage of alumina in good brick earth lies between

(a) 10 - 20%

(b) 20 - 30%

(c) 30 - 40%

(d) 40 - 50%

 

60. Excess of silica in brick earth causes

(a) Loss of cohesion

(b) Impermeability

(c) Cracking and warping on drying

(d) Brittleness

 

61. The main function of alumina in brick earth is to

(a) Impart plasticity

(b) Increase durability

(c) Prevent shrinkage

(d) Increase impermeability

 

62. The process of mixing clay, water and other ingredients to make brick is called

(a) Moulding

(b) tempering

(c) Pugging

(d) Blending

 

63. Lime is mixed with brick earth to

(a) Impart plasticity

(b) Increase durability

(c) Prevent shrinkage

(d) Increase impermeability

 

64. The maximum percentage of water absorption of I class bricks in 24 hrs should be limited to

(a) 10%

(c) 20%

(b) 15%

(d) 24%

 

65. A relatively high water absorption of a common burnt clay brick indicates.

(a) High bond strength with mortar

(b) High shrinkage of brick

(c) Low strength of brick

(d) Need for more mortar for bedding.

 

66. The maximum percentage of water absorption of II class bricks in 24 hrs should be limited to

(a) 10%

(b) 15%

(c) 20%

(d) 24%

 

67. The crushing strength of I class brick should not be less than

(a) 35 kg/cm2

(b) 70 kg/cm2

(c) 105 kg/cm2

(d) 140 kg/cm2

 

68. The minimum compressive strength of II class brick should be

(a) 35 kg/cm²

(b) 70 kg/cm²

(c) 105 kg/cm²

(d) 140 kg/cm²

 

69. The temperature at which bricks are burnt varies from

(a) 400° to 700°C

(b) 700° to 1000°C

(c) 1000° to 1200°C

(d) 1200° to 1500°C

 

70. The average compressive strength of a burnt clay brick is less than 12.5 N/mm². The allowable rating of efflorescence is

(a) Moderate

(b) Serious

(c) Heavy

(d) Zero

 

71. The internal size of mould used in brick preparation is

(a) Smaller than the size of fully burnt brick

(b) Larger than the size of fully burnt brick

(c) Equal to the size of fully burnt brick

(d) None of the above

 

72.If fine sand or ash is sprinkled on the inner surface of mould, the bricks are known as

(a) Slope moulded

(b) Sand moulded

(c) Table moulded

(d) Machine moulded

 

73. Pug mill is used for

(a) Clay preparation

(b) Clay moulding

(c) Brick drying

(d) Brick burning

 

74. Advantage of clamp burning as compared to kiln burning is

(a) Less initial cost

(b) Takes less time

(c) When large number of bricks are required

(d) None of the above

 

75. The overground continuous kiln is called

(a) Bull's hench kiln

(b) Hoffman's kiln

(c) Tunnel kiln

(d) All of the above

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