Quiznetik

Building Materials | Set 7

1. Gypsum is added in the manufacture of Portland cement

Correct : D. at the end of grinding the clinker into powder

2. The constituent in lime which retard the slaking action and increase the rapidity of setting, is

Correct : A. silica

3. For R.C.C. construction, the maximum size of coarse aggregate is limited to

Correct : D. 25 mm

4. Which of the following statement is correct?

Correct : A. The fat lime swells two to three times of its original volume during slaking.

5. The dolomite bricks are

Correct : C. basic refractory bricks

6. According to Indian standard specifications, the full strength of concrete is achieved after

Correct : D. 28 days

7. Igeous rock has

Correct : A. crystalline, glossy or fused texture

8. Poor or lean lime

Correct : D. none of the above

9. The workability of cement concrete can be improved by

Correct : A. increasing the quantity of cement

10. The liquid medium used in oil paints is

Correct : C. linseed oil

11. The good clay for making bricks is

Correct : B. weathered clay

12. The strength of timber is maximum in the direction

Correct : A. parallel

13. The liquid medium used in enamel paints is

Correct : D. varnish

14. Granite is an example of

Correct : D. igneous rocks

15. The sand is mixed with lime mortar to

Correct : D. prevent shrinkage and cracking

16. Bituminous paint consists of bitumen dissolved in

Correct : D. either (a) or (b)

17. The colour of brick depends upon the amount of iron oxide present in the clay.

Correct : A. Correct

18. The bricks should be burnt at temperature from

Correct : D. 1000?C to 1200?C

19. The principal constituent of every kind of brick earth is alumina.

Correct : A. True

20. The thickness of lamin boards vary from

Correct : C. 12 to 25 mm

21. The purpose of seasoning of timber is to

Correct : C. reduce moisture content

22. Rich or fat lime

Correct : D. all of these

23. Le-chatelier method is used to determine

Correct : C. soundness of cement

24. The fuel generally used for burning limestone is

Correct : D. any one of these

25. The specific gravity of sandstone is

Correct : C. 2.65 to 2.95

26. The commonly used cement in cement paints is

Correct : A. white cement

27. The most powerful explosive used in blasting is

Correct : C. gun cotton

28. The quarrying of stone by the method of wedging is successfully carried out in

Correct : D. all of these

29. The indentation marks left on bricks during the process of moulding, are known as

Correct : B. frogs

30. Efflorescence is caused if

Correct : D. all of the above

31. The moisture content in timber for framework should not exceed

Correct : C. 15%

32. The strength of white cement is

Correct : B. less than

33. The thinner used for oil paints is

Correct : B. turpentine

34. The bitumen paints are used for providing

Correct : C. protective

35. The slump test of concrete is used to measure its

Correct : A. consistency

36. The bulking of sand

Correct : A. increases

37. The percentage of silica in a good brick clay should vary from

Correct : D. 50 to 60%

38. The sedimentary rocks are formed due to

Correct : B. gradual deposition of materials like sand, clay, etc., generally by setting water

39. In order to dry the quarry sap of a freshly quarried slone, it should be exposed to open air for a period of

Correct : C. six to twelve months

40. The metallic oxide used in the form of powder in a paint is called

Correct : B. base

41. A first class brick should not absorb water more than

Correct : C. 20%

42. The colour of granite is

Correct : D. all of these

43. The stone used for the construction of curved or ornamental work should be soft.

Correct : A. Right

44. Moorum is a decomposed laterite and has deep brown or red colour.

Correct : A. Yes

45. The rocks formed due to alteration of original structure under heat and excessive pressure are called metamorphic rocks.

Correct : A. Agree

46. The silica in Portland cement should be

Correct : B. 20 to 25%

47. Excess pf alumina in the clay

Correct : B. makes the brick crack and warp on drying

48. The final setting time of ordinary cement should not be more than

Correct : D. 10 hours

49. The brick earth is derived by the disintegration of

Correct : A. igneous

50. The central part of a tree is called

Correct : B. pith

51. Which of the following is an example of silicious rock?

Correct : D. all of these

52. During the process of burning limestone, clay forms certain compound which

Correct : D. all of the above

53. The clinker is formed at a temperature of

Correct : D. 1500?C

54. The ultimate strength of cement is provided by

Correct : B. di-calcium silicate

55. The slaking of moderately hydraulic lime is scarcely noticeable.

Correct : B. No

56. The durability of concrete is proportional to

Correct : C. cement-aggregate ratio

57. The rate of hydration and hydrolysis of cement depends upon its

Correct : B. fineness

58. The expansion of cement should not exceed

Correct : B. 10 mm

59. Distemper is used on

Correct : D. plastered surfaces not exposed to weather

60. Slate in the form of tiles is used

Correct : C. as an excellent roof covering material

61. A good Portland cement when tested for fineness, the percentage of residue left after sieving in 90 micron IS sieve should not exceed 10 percent.

Correct : A. True

62. Lime is used

Correct : D. all of the above

63. For the construction of retaining walls, a

Correct : C. heavy

64. Quick lime is a

Correct : C. product left immediately after the calcination of pure limestone

65. Enamel paint is made by adding

Correct : A. white lead in varnish

66. Jhama bricks are

Correct : D. over burnt with irregular shape

67. The pigment in paints is mixed to give desired

Correct : B. colour

68. Granite is mainly composed of

Correct : D. quartz, felspar and mica

69. The coefficient of linear expansion of concrete is almost the same as that of steel.

Correct : A. Correct

70. For one cubic metre of brick masonry, the number of bricks required are

Correct : D. 550

71. The defect caused by imperfect seasoning, is called

Correct : C. honeycombing

72. A good quality cement should have higher percentage of

Correct : D. tri-calcium silicate

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

Correct : D. 7 MN/m2

74. The average out-turn of first class bricks in kiln burning is

Correct : D. 80 to 90%

75. Gneiss is chemically classified as

Correct : C. silicious rock

76. The chief ingredient of a paint is

Correct : D. pigment

77. The setting and hardening of cement paste is mainly due to the hydration and hydrolysis of

Correct : D. all of these

78. The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known as

Correct : C. slaking

79. The fineness of cement is tested by

Correct : A. air-permeability method

80. The standard size of a masonry brick is 20 cm x 10 cm x 10 cm

Correct : B. Disagree

81. Which of the following statement is correct?

Correct : C. The mortar made with coarse sand is stronger than the one made with fine stand.

82. When quarrying is to be done in hard stone and compact rocks, the usual method of quarrying is

Correct : C. by blasting

83. The soundness of cement is tested by

Correct : B. Le-chatelier method

84. The wood generally used for railway sleepers is

Correct : B. kail

85. Which of the following statement is correct?

Correct : B. Stucco paints contain polyvinyl acetate.

86. Gun cotton is made by saturating cotton with nitric acid.

Correct : A. Agree

87. The maximum water-cement ratio for durable concrete is

Correct : D. 0.8

88. According to Indian standard specifications, the concrete should be cured under a humidity of

Correct : D. 90%

89. The durability of cement concrete is usually improved by

Correct : B. increasing the quantity of cement

90. The specific gravity of stone should not, in any case be less than

Correct : D. 2.5

91. The burning of bricks in kilns is complete within

Correct : B. 24

92. A fine-grained granite

Correct : D. all of these

93. Excess of silica in the clay

Correct : A. makes the brick brittle and weak

94. For railway ballast, the stone should be

Correct : D. hard, dense, durable, tough and easily workable

95. The crushing strength of a stone depends upon its

Correct : D. both (a) and (b)

96. The strength of cement concrete is directly proportional to cement-water ratio.

Correct : A. Agree

97. Lime occurs in a free state in nature.

Correct : B. False

98. The best primer used for structural steel work is

Correct : B. red lead

99. The size of mould for bricks should be

Correct : C. larger than

100. The paint which has high reflective property is

Correct : C. bronze paint