Quiznetik

Building Materials | Set 1

1. Which of the following has more fire resisting characteristics?

Correct : C. Compact sand stone

2. The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

Correct : A. Plutonic rocks

3. Plywood has the advantage of

Correct : C. Same tensile strength in all directions

4. Due to attack of dry rot, the timber

Correct : C. Reduces to powder

5. Excess of alumina in brick earth makes the brick

Correct : D. To crack and warp on drying

6. Pick up the correct statement from the following:

Correct : D. All the above

7. The constituent of cement which is responsible for all the undesirable properties of cement is

Correct : C. Tri-calcium aluminate

8. Inner part of a timber log surrounding the pitch, is called

Correct : C. Heart wood

9. For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of

Correct : B. 1 : 3

10. If is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is

Correct : D. 0.85 P

11. The basic purpose of a retarder in concrete is

Correct : A. To increase the initial setting time of cement paste in concrete

12. Clay and silt content in a good brick earth must be at least

Correct : A. 50 %

13. Which of the following is the purest form of iron?

Correct : B. Wrought iron

14. If the iron ore contains clay as an impurity, the flux added during calcination, is

Correct : B. Lime stone

15. The stretcher bond in brick masonry can be used only when the thickness of wall is

Correct : A. 90 mm

16. The plywood

Correct : C. Has greater impact resistance to blows than ordinary wood

17. Pick up the correct statement from the following:

Correct : D. All the above

18. Advantage of a clamp compared to a kiln for burning bricks is that

Correct : C. It has less initial cost

19. Pick up the correct statement from the following:

Correct : D. All the above

20. Assertion A : Pure lime takes a long time to develop adequate strength. Reason R : Pure lime has slow hardening characteristics. Select your answer according to the coding system given below:

Correct : A. Both A and R is true and R is correct explanation of A

21. During pudding

Correct : D. All the above

22. Early attainment of strength in rapid hardening cement is mainly due to

Correct : B. Finer grinding

23. Pick up the correct statement from the following:

Correct : D. All the above

24. Which of the following cements contains maximum percentage of dicalcium silicate?

Correct : B. Low heat cement

25. Pick up the incorrect statement from the following:

Correct : D. None of these

26. Which of the following stresses is used for identifying the quality of structural steel?

Correct : B. Yield stress

27. Quick lime

Correct : D. All the above

28. Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:

Correct : B. Both A and R is true but R is not the correct explanation of A

29. Putty is

Correct : D. All the above

30. A mortar joint in masonry which is normal to the face of wall is known as

Correct : C. Cross joint

31. A volatile substance added to a paint to make its application easy and smooth, is known as

Correct : B. Solvent

32. Jumper is a tool used for

Correct : B. Quarrying of stones

33. Pick up the volcanic rock from the following:

Correct : C. Basalt

34. Sapwood consists of

Correct : B. Portion of timber between heartwood and cambium layer

35. Strength of cement concrete primarily depends upon

Correct : D. Water-cement ratio

36. The main function of alumina in brick earth is

Correct : A. To impart plasticity

37. Cast iron

Correct : D. All the above

38. Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

Correct : B. Silica and alkalies

39. Pick up the correct statement from the following:

Correct : D. All the above

40. Hydraulic lime is obtained by

Correct : B. Burning of kankar

41. Oil varnish generally consists of

Correct : C. Resin, oil and turpentine

42. For testing compressive strength of cement, the size of cube used is

Correct : B. 70.6 mm

43. When a brick is immersed in water for 24 hours and then dried, if

Correct : D. All the above

44. For sanitary pipes and chemical stonewares,

Correct : A. Salt glazing is used

45. The most commonly used retarder in cement is

Correct : A. Gypsum

46. The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called

Correct : B. Hypabyssal rocks

47. The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is

Correct : A. Less than 1

48. Non acid-resistant asbestos is:

Correct : B. Chrysotile asbestos

49. The pressure acting on the stones in stone masonry construction should be

Correct : D. Perpendicular to the direction of bedding planes

50. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

Correct : A. Alumina

51. The type of bond provided in brick masonry for carrying heavy loads is

Correct : C. English bond

52. Blister steel

Correct : D. All the above

53. Gypsum is a

Correct : C. Chemically precipitated sedimentary rock

54. Seasoning of timber is done

Correct : D. To remove water

55. Which of the following is a rock?

Correct : C. Gypsum

56. The tendency of a stone is, to split along:

Correct : C. Cleavage

57. Which of the following stone is best suited for construction of piers and abutments of a railway bridge?

Correct : A. Granite

58. Cast iron contains carbon approximately

Correct : A. 1.5% to 5.5%

59. Which of the following trees yields hard wood?

Correct : C. Shishum

60. Soundness of cement is tested by

Correct : B. Le-chatelier apparatus

61. First class timber has an average life of

Correct : D. More than 10 years

62. Bitumen may be dissolved in

Correct : D. Carbon disulphide

63. Which of the following ingredients of the brick earth enables the brick to retain its shape?

Correct : B. Silica

64. Veneering means

Correct : C. Thick layer of superior wood glued to inferior wood

65. Number of bricks required for one cubic metre of brick masonry is

Correct : C. 500

66. Which one of the following is used for preparing porcelain?

Correct : D. All of these

67. The main ingredients of Portland cement are

Correct : A. Lime and silica

68. Pick up the correct statement from the following:

Correct : D. All the above

69. After storage, the strength of cement

Correct : A. Decreases

70. A bull nose brick is not used for

Correct : D. Arches

71. The most common admixture which is used to accelerate the initial set of concrete is

Correct : B. Calcium chloride

72. Chlorite, a green colour mineral is mainly derived from the decomposition of

Correct : A. Augite

73. The ultimate tensile strength of structural mild steel is about

Correct : C. 420 N/mm²

74. Asbestos

Correct : D. All the above

75. A queen closer is a

Correct : C. Brick having the same length and depth as the other bricks but half the breadth

76. The percentage of alumina and silica in good fire clay vary respectively is

Correct : A. 25, 75

77. The proportions of lime and sand in the mortar normally used in brick construction are

Correct : A. 1 : 2

78. Index number expressing the relative sizes of both coarse and fine aggregates, is called

Correct : B. Fineness modulus

79. Which of the following sedimentary rocks changes into quartzite by metamorphic action?

Correct : A. Sand stone

80. Lime putty

Correct : D. All of above

81. The stone suitable for rubble masonry should be.

Correct : A. Hard

82. Pick up the correct statement from the following:

Correct : D. All the above

83. Spalling hammer is used for

Correct : B. Rough dressing of stones

84. Bullet proof glass is made of thick glass sheet sandwiched by a layer of

Correct : C. High test plastic

85. Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

Correct : D. 90°

86. According to IS 399-1963, the weight of the timber is specified at

Correct : C. 12% moisture content

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

Correct : C. Greater than the size of a fully burnt brick

88. Pick up the correct statement from the following:

Correct : D. All the above

89. Quick lime is

Correct : B. Calcium oxide

90. Pick up the correct statement from the following:

Correct : D. All the above

91. The initial setting time for ordinary Portland cement as per IS specifications should not be less than

Correct : B. 30 minutes

92. Rapid hardening cement attains early strength due to

Correct : A. Larger proportion of lime grounded finer than normal cement

93. With increase in moisture content, the bulking of sand

Correct : C. First increases to a certain maximum value and then decreases

94. Plywood is normally available

Correct : D. 3 mm to 4 mm thick

95. Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is

Correct : D. (i) and (iv)

96. In a mortar, the binding material is

Correct : A. Cement

97. The vehicle used in case of enamel paints is usually

Correct : C. Varnish

98. In the method of condensation polymerization,

Correct : D. All of the above

99. The slenderness ratio for masonry walls should not be more than

Correct : B. 20

100. Sand stone is

Correct : A. Sedimentary rock