Building Materials MCQs Practice Set

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  1. The rocks formed due to solidification of molten mass laying below or above the earth surface, are called
  • Aqueous rocks
  • Sedimentary rocks
  • Metamorphic rocks
  • Igneous rocks (correct)

2. The Sedimentary rocks are formed due to

  • solidification of molten mass laying below or above the earth surface
  • gradual deposition of materials like sand, clay, etc., generally by setting water (Ans)
  • alteration of original structure under heat and excessive pressure
  • none of the above

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

  • Agree (correct)
  • Disagree

4. Granite is an example of

  • Aqueous rocks
  • Sedimentary rocks
  • Metamorphic rocks
  • Igneous rocks (correct)

5. Igneous rocks has

  • Crystalline, glossy or fused texture (correct)
  • Foliated structure which is hard and durable
  • Layers of different composition, colour and structure
  • None of the above

6. Laterite is chemically classified as

  • Calcareous rock
  • Argillaceous rock (correct)
  • Silicious rock
  • Metamorphic rock

7. The calcareous rocks have………….as the main constituent.

  • Lime or calcium carbonate (correct)
  • Clay or alumina

8. Gneiss is chemically classified as

  • Calcareous rock
  • Argillaceous rock
  • Silicious rock (correct)
  • None of these

9. Which of the following is an example of Argillaceous rock ?

  • Kaolin
  • Slate
  • Laterite
  • All of these (correct)

10. Which of the following is an example of Silicious rock ?

  • Granite
  • Gneiss
  • Quartzite
  • All of these (correct)

11. Limestone is physically classified as……………..rock.

  • Stratified (correct)
  • Unstratified

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

  • Yes (correct)
  • No

13. Marble is an example of

  • Aqueous rocks
  • Metamorphic rocks (correct)
  • Sedimentary rocks
  • Igneous rocks

14. Slat in the form of tiles is used

  • For paving
  • As road metal
  • As an excellent roof covering material (correct)
  • For the manufacture of cement

15. Granite is mainly composed of

  • Quartz and mica
  • Felspar and mica
  • Quartz and Felspar
  • Quartz, Felspar and mica (Ans)

16. Sandstone consists of

  • Quartz and lime
  • Quartz and silica
  • Quartz, lime and silica (correct)
  • Silica,lime and alumina

17. Marble contains mostly lime and silica.

  • True
  • False (correct)

18. The compressive strength of granite is

  • 50 to 70 MN/m2
  • 70 to 130 MN/m(correct)
  • 130 to 170 MN/m2
  • 170 to 200 MN/m2

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

  • One month
  • Four month
  • Six to twelve months (correct)
  • Two years

20. A good building stone is one which does not absorb more than………….of its weight of water after one day’s immersion.

  • 5 % (correct)
  • 10 %
  • 15 %
  • 25 %

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

  • 1
  • 5
  • 2
  • 5 (correct)

22. Which of the following statement is wrong ?

  • A stone with large percentage of quartz is vary soft. (correct)
  • Quartz has a greasy lustre.
  • Felspar is a silicate of aluminium with varying amounts of potash, sada or lime.
  • All of these

23. Siliceous rocks have alumina or clay as their major constituent.

  • Yes
  • No (Ans)

24. Argillaceous rocks have their main constituent as

  • Carbonates of lime
  • Clay or alumina (correct)
  • Silica or sand
  • All of these

25.The colour of granite is

  • Grey
  • Green
  • Brown
  • All of these (correct)

26. A fine – grained granite

  • Offers higher resistance to weathering
  • Can be easily polished and worked
  • Is used for exterior facing of buildings
  • All of these (correct)

27. A limestone found in seams of great thickness in non – crystalline texture with early appearance, is called

  • Granular limestone
  • Compact limestone (correct)
  • Magnesium limestone
  • Kankar

28. A limestone containing about 30% of alumina and silica is called

  • Granular limestone
  • Compact limestone
  • Magnesium limestone
  • Kankar (correct)

29. The compressive strength of sandstone is

  • 40 MN/m2
  • 55 MN/m2
  • 65 MN/m(correct)
  • 80 MN/m2

30. The specific gravity of sandstone is

  • 1 to 1.8
  • 8 to 2.65
  • 65 to 2.95 (Ans)
  • 95 to 3.4

31. The silicious sandstone which has been subjected to metamorphic action, is called

  • Moorum
  • Laterite
  • Quartzite (correct)
  • Dolomite

32. For railway ballast, the stone should be

  • Soft with a uniform texture
  • Hard, tough, resistant to abrasion and durable
  • Hard, dense, durable, tough and easily workable (correct)

33. The quarrying of stone by the method of wedging is successfully crried out in

  • Sandstones
  • Limestones
  • Marbles
  • All of these (correct)

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

  • By wedging
  • By channeling machine
  • By blasting (correct)
  • All of these

35. The compressive strength of felspar is……………… quartz.

  • Equal to
  • Less than (correct)
  • More than

36. The most powerful explosive used in blasting is

  • Blasting power
  • Dynamite
  • Gun cotton (correct)
  • Cordite

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

  • Agree (correct)
  • Disagree

38. The dressing of stone is done

  • Immediately after quarrying (correct)
  • After seasoning
  • After three months of quarrying
  • Just before building

39. The crushing strength of a stone depends upon its

  • Texture
  • Specific gravity
  • Workability
  • Both (a) and (b) (correct)

40. For the construction of retaining walls, a…………stone must be used.

  • Soft
  • Hard
  • Heavy (correct)

41. The attrition test on stones is performed

  • To determine the crushing strength of the stone
  • For assessing the resistance of stone to the sun, rain, wind etc.
  • To ascertain the stability of the stone when exposed to acid fumes
  • For determining the rate of wear of stone due to grinding action under traffic (Ans)

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

  • Right (correct)
  • Wrong

43. A first class brick should not absorb water more than………………of its own dry weight after 24 hours immersion in cold water.

  • 10 %
  • 15 %
  • 20 % (correct)
  • 25 %

44. The brick earth is derived by the disintegration of……………..rocks.

  • Igneous (correct)
  • Metamorphic

45. The principle constituent of every kind of brick earth is alumina.

  • True (correct)
  • False

46. A first class brick should have a minimum crushing strength of

  • 7 MN / m2
  • 5 MN / m2 (correct)
  • 5 MN / m2
  • 14 MN / m2

47. The percentage of alumina in a good brick clay should vary from

  • 20 to 30 % (correct)
  • 30 to 40 %
  • 40 to 50 %
  • 50 to 60 %
  1. The percentage of silica in a good brick clay should vary from
  • 20 to 30 %
  • 30 to 40 %
  • 40 to 50 %
  • 50 to 60 % (correct)

49. Excess of alumina in the clay

  • Makes the brick brittle and weak
  • Makes the brick crack and warp on drying (correct)
  • Changes colour of the brick from red to yellow
  • Improves impermeability and durability of the brick

50. Excess of silica in the clay

  • Makes the brick brittle and weak (correct)
  • Makes the brick crack and warp on drying
  • Changes colour of the brick from red to yellow
  • Improves impermeability and durability of the brick

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

  • Correct (Ans)
  • Incorrect

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

  • Alumina
  • Silica
  • Lime (Ans)
  • Alkalies

53.The alkaline salt present in the bricks, absorbs moisture from the air which on drying

  • Leaves pores and makes the bricks porous
  • Leaves high powder deposit on the brick (Ans)
  • Makes the bricks brittle and weak
  • All of these

54.Th standard size of a masonry brick is 20 cm * 10 cm * 10 cm.

  • Agree
  • Disagree (Ans)

55.The size of mould for bricks should be…………….the specified size of the bricks.

  • Equal to
  • Smaller than
  • Larger than (Ans)

56.Efflorescence is caused if

  • The alkaline salt is present in the bricks
  • The clay used for making bricks contain pyrite
  • The water used for pugging the clay contains gypsum
  • All of the above (Ans)

57.The good clay for making bricks is

  • Unweathered clay
  • Weathered clay (Ans)
  • Silted soil
  • Black cotton soil

58.The process of mixing clay, water and other ingredients to make bricks, is known as

  • Tempering
  • Pugging
  • Kneading (Ans)
  • Moulding

59.The hand made bricks are…………..to machine made bricks for facing purposes

  • Superior (Ans)
  • Inferior

60.The bricks after moulding should be dried in

  • Open air
  • Sun for 3 to 8 days
  • Air for 3 to 8 days but not in sun (Ans)
  • Hot air for 3 days

61.The natural drying of bricks is also called hack drying.

  • True (Ans)
  • False

62.The indantation marks left on bricks during the process of moulding, are known as

  • Fillets
  • Frogs (Ans)
  • Projections
  • Marks

63.The frog of a brick is normally made on its

  • Longer face
  • Shorter face
  • Bottom face
  • Top face (Ans)

64.The average out – turn of first class bricks in clamp burning is about

  • 50 %
  • 60 % (Ans)
  • 70 %
  • 80 %
  1. .The average out – turn of first class bricks in kiln burning is
  • 50 to 60 %
  • 60 to 70 %
  • 70 to 80 %
  • 80 to 90 % (Ans)

66.The burning of bricks in kilns is complete within……………..hours.

  • 12
  • 24 (Ans)
  • 48
  • 96

67.The bricks after burning in kilns require about…………..days to cool down for unloading.

  • 4
  • 8
  • 10
  • 12 (Ans)

68.The bricks should be burnt at temperature from

  • 300oC to 500oC
  • 500oC to 700oC
  • 700oC to 1000oC
  • 1000oC to 1200oC (Ans)

69.The type of brick suitable for panal walls for multi – storeyed buildings is

  • Hollow bricks (Ans)
  • Perforated bricks (Ans)
  • Either (a) or (b)
  • None of these

70.The compressive strength of second class bricks should not be less than

  • 5 MN /m2 (Ans)
  • 9 MN /m2
  • 5 MN /m2
  • 12 MN /m2

71.Jhama bricks are

  • Well burnt having smooth and even surface
  • Slightly over burnt having rough surface
  • Under burnt and can be easily broken
  • Over burnt with irregular shape (Ans)

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

  • 4 MN /m2
  • 5 MN /m2
  • 6 MN /m2
  • 7 MN /m2 (Ans)

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

  • 20 MN /m2
  • 30 MN /m2
  • 40 MN /m2 (Ans)
  • 50 MN /m2

74.The length of a curved tile varies from

  • 10 to 12 cm
  • 12 to 15 cm
  • 15 to 20 cm(Ans)
  • 20 to 22.5 cm

75.Which of the following statement is wrong ?

  • The pan tiles are similar to pot tiles,but are less curved.
  • The pan tiles are comparatively heavier, stronger and durable than curved tiles.
  • The fire bricks are generally used for lining kilns.
  • None of the above (Ans)

76.For one cubic matre of brick masonry, the number of bricks required are

  • 400
  • 450
  • 500
  • 550 (Ans)

77.The dolomite bricks are

  • Ordinary bricks
  • Acid refractory bricks
  • Basic refractory bricks (Ans)
  • Neutral refractory bricks

78.A good refractory bricks should withstand high temperature. It should also have low coefficient of expansion and contraction.

  • Yes (Ans)
  • No

79.Lime is used

  • As a matrix for concrete
  • For plastering walls, ceilings etc.
  • For improving soil for agricultural purposes
  • All of the above (Ans)

80.Lime occurs in a free state in nature.

  • True
  • False (Ans)

81.Quick lime is a

  • Carbonate of lime
  • Oxide of calcium
  • Product left immediately after the calcination of pure limestone (Ans)
  • Lime quickly treated with water

82.The lime which consists almost entirely of calcium oxide, is called

  • Poor lime
  • Rich lime (Ans)
  • Hydraulic lime
  • Limestone

83.The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as

  • Poor lime (Ans)
  • Rich lime
  • Hydraulic lime
  • Limestone

84.Eminently hydraulic lime is one in which the percentage of silica, alumina and iron oxide is

  • 5 to 10 %
  • 10 to 25 %
  • 25 to 30 % (Ans)
  • 30 to 40 %

85.The hydraulic lime which resembles very much with Portland cement in its chemical composition is called

  • Feebly hydraulic lime
  • Moderately hydraulic lime
  • Eminently hydraulic lime (Ans)
  • None of these

86.Poor or lean lime

  • Slakes rapidly with considerable evolution of heat
  • Takes very long time to develop adequate strength
  • Has high plasticity
  • None of the above (Ans)

87.Rich or fat lime

  • Slakes rapidly with considerable evolution of heat
  • Takes very long time to develop adequate strength
  • Has high plasticity
  • All of these (Ans)

88.The commonly used lime for works under water or in damp situations is

  • Fat lime
  • Lean lime
  • Feebly hydraulic lime
  • Eminently hydraulic lime (Ans)

89.The slaking of moderately hydraulic lime is scaecely noticeable.

  • Yes
  • No (Ans)

90.Which of the following statement is correct ?

  • The fat lime swells two to three times of its original volume during slaking (Ans)
  • The poor lime is of pure white colour.
  • The feebly hydraulic lime slakes sluggishly
  • All of the above

91.The fuel generally used for burning limestone is

  • Coal
  • Charcoal
  • Firewood
  • Any one of these (Ans)

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

  • Gives hydraulic lime
  • Gives power of quick setting
  • Does not allow to be dissolved in the outside water when used in damp situations
  • All of the above (Ans)

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

  • Calcinations
  • Hydration
  • Slaking (Ans)
  • Quenching

94.The advantage of adding pozzolana ( or surkhi ) to lime is to

  • Reduce shrinkage
  • Increase resistance to cracking
  • Increase resistance to chemical attack
  • All of these (Ans)

95.The commonly used lime in white washing is

  • Quick lime
  • Fat lime (Ans)
  • Lean lime
  • Hydraulic lime

96.The lime mortar is made from

  • Quick lime
  • Fat lime
  • Lean lime
  • Hydraulic lime (Ans)

97.Quick lime on reaction with water gives

  • Hydraulic lime
  • Slaked lime (Ans)
  • Hydrated lime
  • Poor lime

98.Hydraulic lime generates…………..heat as compared to fat lime

  • Same
  • Less (Ans)
  • More

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

  • Silica
  • Sulphate (Ans)
  • Alkalies
  • Alumina

100.The main constituent of a Portland cement is

  • Lime (Ans)
  • Alumina
  • Iron oxide
  • Alkalies

101.The silica in Portland cement should be

  • 10 to 20 %
  • 20 to 25 % (Ans)
  • 25 to 40 %
  • 40 to 60 %

102.The dry process of mixing is usually employed in the manufacture of Portland cement when the raw material is

  • Blast furnace slag (Ans)
  • Chalk
  • Clay
  • All of these

103.The clinker is formed at a temperature of

  • 500oC
  • 1000oC
  • 1200oC
  • 1500oC (Ans)

104.The amount of gypsum, usually, added in the manufacture of cement is

  • 1 to 0.5 %
  • 5 to 1 %
  • 1 to 3 % (Ans)
  • 3 to 5 %

105.Gypsum is added in the manufacture of Portland cement

  • While mixing the raw materials
  • During burning in the rotary kiln
  • At the beginning of grinding the clinker
  • At the end of grinding the clinker into powder (Ans)
  1. Gypsum is added in the manufacture of Portland cement in order to
  • Shorten the setting time of cement
  • Lengthen the setting time of cement (Ans)
  • Decrease the burning temperature
  • Decrease the grinding time

107.The cementing property in cement is mainly due to

  • Lime (Ans)
  • Silica
  • Iron oxide
  • Alumina

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

  • Tri – calcium silicate
  • Di – calcium silicate
  • Tri – calcium aluminate
  • All of these (Ans)

109.The greater the percentage of tri – calcium silicate in the cement, the better will be the cement.

  • Correct (Ans)
  • Incorrect

110.The compound responsible for the initial setting of cement, is

  • Tri – calcium aluminate
  • Tetra – calcium alumino ferrite
  • Both (a) and (b) (Ans)
  • None of these

111.The ultimate strength of cement is provided by

  • Silica
  • Di – calcium silicate (Ans)
  • Tri – calcium silicate
  • Tri – calcium aluminate

112.A good quality cement should have higher percentage of

  • Silica
  • Free lime
  • Di – calcium silicate
  • Tri – calcium silicate (Ans)

113.The strength of white cement is……………..that of ordinary cement.

  • Equal to
  • Less than (Ans)
  • Greater than

114.The percentage of the slag component of Portland – slag cement varies from

  • 10 to 40 %
  • 40 to 70 % (Ans)
  • 70 to 80 %
  • 80 to 90 %

115.The rapid hardening Portland cement has a

  • Lower heat of hydration
  • Higher heat of hydration (Ans)
  • Lower shrinkage coefficient
  • Higher shrinkage coefficient (Ans)

116.The initial setting of cement is caused due to

  • Di – calcium silicate
  • Tri – calcium silicate
  • Tri – calcium aluminate (Ans)
  • Tri – calcium alumino ferrite
  1. The rapid hardening Portland cement is obtained by
  • Grinding the clinker to a high degree of fineness (Ans)
  • Adding calcium sulphate to the mixture
  • Adding gypsum after grinding
  • Burning the mixture at a lower temperature

118.The fineness of cement is tested by

  • Air – permeability method (Ans)
  • Le – chatelier method
  • Vicat’s apparatus
  • All of these

119.The soundness of cement is tested by

  • Air – permeability method
  • Le – chatelier method (Ans)
  • Vicat’s apparatus
  • All of these
  1. Vicat’s apparatus is used to determine the
  • Initial setting time of cement
  • Final setting time of cement
  • Normal consistency of cement
  • All of these (Ans)

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

  • True (Ans)
  • False

122.Le – chatelier method is used to determine

  • Initial setting of cement
  • Fineness of cement
  • Soundness of cement (Ans)
  • Normal consistency of cement

123.The expansion of cement should not exceed…………………for any type of Portland cement.

  • 5 mm
  • 10 mm (Ans)
  • 15 mm
  • 20 mm

124.The normal consistency of Portland cement is about

  • 10 %
  • 15 %
  • 20 %
  • 25 % (Ans)

125.The initial setting time of rapid hardening cement should not be less than

  • 30 min (Ans)
  • 1 hour
  • 4 hours
  • 8 hours

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

  • 2 hours
  • 4 hours
  • 8 hours
  • 10 hours (Ans)

127.The addition of pozzolana to Portland cement causes

  • Less heat of hydration
  • Increase in shrinkage
  • Decrease in permeability
  • All of these (Ans)

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

  • Sounness
  • Fineness (Ans)
  • Setting time
  • Tensile strength

129.The compressive strength of ordinary cement is less than its tensile strength.

  • Right
  • Wrong (Ans)

130.The percentage of the residue left after sieving good Portland cement in 90 micron sieve should not exceed

  • 5 %
  • 10 % (Ans)
  • 20 %
  • 30 %

131.The expansion in Portland cement can be tested by

  • Fineness test
  • Soundness test (Ans)
  • Setting time test
  • Normal consistency test

132.The specific surface (in cm/g) of a good Portland cement should not be less than

  • 500
  • 1100
  • 2250 (Ans)
  • 3200
  1. The expansion of Portland cement is caused by
  • Free lime
  • Magnesia
  • Silica
  • Both (b) and (c)
  1. The compressive strength of a good Portland cement and standard sand mortar after 3 days of curing should not be less than
  • 7 MN /m2
  • 5 MN /m(Ans)
  • 5 MN /m2
  • 21 MN /m2

135.The sand is mixed with lime mortar to

  • Reduce cost
  • Reduce setting time
  • Improve strength
  • Prevent shrinkage and cracking (Ans)

136.Which of the following statement is correct ?

  • The sand used for making mortar should be fine.
  • The rounded grains of sand produce a strong mortar.
  • The mortar made with coarse sand is stronger than the one made with fine stand. (Ans)
  • All of the above

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

  • 10 mm
  • 15 mm
  • 20 mm
  • 25 mm (Ans)

138.The bulking of sand……………with addition of water upto about 5 % by weigth.

  • Increases (Ans)
  • Decreases

139.Concrete is strong in tension but weak in compression.

  • True
  • False (Ans)

140.Consolidation of concrete should proceed

  • Before mixing
  • Before placing
  • Immediately after mixing
  • Immediately after placing
  1. The workability of cement concrete can be improved by
  • Increasing the quantity of cement (Ans)
  • Increasing the proportion of coarse aggregate
  • Increasing the quantity of sand
  • All of the above

142.The durability of concrete is proportional to

  • Sand content
  • Water – cement ratio
  • Cement – aggregate ratio (Ans)
  • Aggregate – water ratio

143.The maximum water – cement ratio for durable concrete is

  • 2
  • 4
  • 6
  • 8 (Ans)

144.The durability of cement concrete is usually improved by

  • Increasing the quantity of coarse sand
  • Increasing the quantity of cement (Ans)
  • Decreasing the water – cement ratio
  • Decreasing the proportion of fine aggregate

145.The strength of cement concrete increases with

  • Increase in the size of aggregate
  • Increase in the temperature of water of curing (Ans)
  • Increase in the size of aggregate
  • All of the above

146.The density of concrete………………with increase in the size of aggregate.

  • Does not change
  • Increases (Ans)
  • Decreases

147.The strength of cement concrete is directly proportional to cement – water ratio.

  • Agree(Ans)
  • Disagree

148.The shrinkage of concrete

  • Is proportional to contents of cement
  • Is directly proportional to water contents at the time of mixing
  • Increases with increase in the percentage of concrete (Ans)
  • All of the above

149.The shrinkage of concrete……………..its bond strength.

  • Does not change
  • Increases (Ans)
  • Decreases

150.The shrinkage of ordinary concrete is about

  • 1 to 0.3 mm/m
  • 3 to 0.6 mm/m (Ans)
  • 6 to 1.2 mm/m
  • 2 to 2.1 mm/m

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

  • Correct
  • Incorrect (Ans)

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

  • 30 %
  • 50 %
  • 70 %
  • 90 % (Ans)
  1. According to Indian standard specifications,the full strength of concrete is achieved after
  • 7 days
  • 14 days
  • 21 days
  • 28 days (Ans)
  1. According to Indian standard specifications,the temperature for curing is
  • 5oC
  • 10oC
  • 27oC (Ans)
  • 42oC

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

  • Consistency (Ans)
  • Tensile and compressive strength
  • Impact value
  • Homogeneity

156.The central part of a tree is called

  • Heart wood
  • Pith (Ans)
  • Sap wood
  • Cambium layer

157.The thin radial fibres extending from the pith to the cambium layer is called medullary rays.

  • Yes (Ans)
  • No

158.The defect caused due to over – maturity and unventilated storage of the wood during its transit, is called

  • Knot
  • Rind gall
  • Foxiness (Ans)
  • Heart shake
  1. The defect caused by imperfect seasoning, is called
  • Wet rot
  • Dry rot
  • Honeycombing (Ans)
  • Cup shake

160.Seasoning of timber

  • Increases the weight of timber
  • Improves strength properties of timber (Ans)
  • Does not give dimensional stability
  • All of these

161.The purpose of seasoning of timber is to

  • Change the direction of grains
  • Remove voids
  • Reduce moisture content (Ans)
  • All of these

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

  • 5 %
  • 10 %
  • 15 % (Ans)
  • 20 %

163.The time required for air seasoning of soft wood is

  • 15 to 30 days
  • 30 to 60 days
  • 60 to 90 days (Ans)
  • 90 to 120 days
  1. The time required for seasoning of timber in kiln seasoning is
  • 2 to 5 days
  • 5 to 10 days
  • 10 to 20 days (Ans)
  • 20 to 40 days

165.The timber whose thickness is less than 5 cm and the width exceeds 12 cm, is called a

  • Board (Ans)
  • Plank
  • Batten
  • Log

166.The strength of timber is maximum in the direction……………..to the grains.

  • Parallel (Ans)
  • Perpendicular

167.An assembled product made up of veneers and adhesives is called

  • Board
  • Plank
  • Plywood (Ans)
  • Batten

168.The thickness of five – ply sheet varies from

  • 3 to 6 mm
  • 6 to 9 mm (Ans)
  • 9 to 16 mm
  • 16 to 20 mm
  1. The thickness of lamin boards vary from
  • 5 to 12 mm
  • 12 to 15 mm
  • 12 to 25 mm (Ans)
  • 25 to 30 mm

170.The wood generally used for railway sleepers is

  • Mango
  • Kail (Ans)
  • Babul
  • Deodar

171.The chief ingredient of a paint is

  • Alcohol
  • Drier
  • Oil
  • Pigment (Ans)

172.The liquid medium used in oil paints is

  • Thinner
  • Alcohol
  • Linseed oil (Ans)
  • Turpentine

173.The pigment in paints is mixed to give desired

  • Smoothness
  • Colour (Ans)
  • Appearance
  • Durability

174.The liquid part of the paint is called

  • Pigment
  • Vehicle (Ans)
  • Solvent
  • Drier

175.The liquid medium used in enamel paints is

  • Thinner
  • Alcohol
  • Turpentine
  • Varnish (Ans)

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

  • Extender
  • Base (Ans)
  • Vehicle
  • Drier

177.The base in a paint is added to

  • Improve the quality of paint
  • Make smooth surface
  • Hide the surface to be painted (Ans)
  • All of these

178.The commonly base used in a paint is

  • Iron oxide
  • Zinc oxide
  • Titanium white
  • Any one of these (Ans)

179.The thinner used for oil paints is

  • Water
  • Turpentine (Ans)
  • Carbon tetrachloride
  • Any one of these

180.Linseed oil in paint is used as a

  • Base
  • Thinner
  • Carrier (Ans)
  • Pigment
  1. Linseed oil is rapidly soluble in
  • Alcohol
  • Turpentine
  • Naptha
  • All of these (Ans)

182.The commonly used extender in a paint is

  • Barium sulphate
  • Gypsum
  • Alcohol
  • Any one of these (Ans)

183.The drier in an oil paint should not be more than…………(by volume).

  • 5 %
  • 10 % (Ans)
  • 15 %
  • 20 %

184.The commonly used solvent in oil paints is

  • Turpentine (Ans)
  • Naptha
  • Either (a) or (b)
  • None of these

185.The best primer used for structural steel work is

  • White lead
  • Red lead (Ans)
  • Zinc oxide
  • Iron oxide

186.The vehicle used in bronze paints is usually

  • Linseed oil
  • Naptha
  • Water
  • Nitro – cellulose lacquer (Ans)

187.Bituminous paint consists of bitumen dissolved in

  • Spirit
  • Naptha
  • Linseed oil
  • Either (a) or (b) (Ans)

188.The bitumen paints are used for providing…………surface

  • Rough
  • Smooth
  • Protective (Ans)

189.The commonly used cement in cement paints is

  • White cement (Ans)
  • Portland cement
  • Alumina cement
  • Rapid hardening cement

190.The solvent used in cement paints is

  • Thinner
  • Turpentine
  • Water (Ans)
  • Spirit

191.Snocem is an oil paint

  • True
  • False (Ans)

192.Enamel paint is made by adding

  • White lead in varnish (Ans)
  • Bitumen in varnish
  • White lead in lacquer
  • Zinc white in spirit

193.The paint which has high reflective property is

  • Cellulose paint
  • Casein paint
  • Bronze paint (Ans)
  • Enamel paint

194.Which of the following paint is highly resistant to fire?

  • Cement paint
  • Asbestos paint (Ans)
  • Aluminium paint
  • Enamel paint

195.Lacquer paints are more durable than enamel paints.

  • Yes (Ans)
  • No

196.Spirit varnish consists of

  • Spirit and wax
  • Spirit and shellac (Ans)
  • Turpentine, spirit,and wax
  • Turpentine, spirit,and shellac

197.Distemper is used on

  • Brick walls
  • Concrete surfaces
  • Plastered surfaces exposed to weather
  • Plastered surfaces not exposed to weather (Ans)

198.The base material for distemper is

  • Chalk (Ans)
  • Lime
  • Clay
  • Lime putty

199.Which of the following statement is correct ?

  • Stains used as paints have synthetic pigments.
  • Stucco paints contain polyvinyl acetate. (Ans)
  • The solvent used in distempers is turpentine.
  • All of the above

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VideRime

Arbaj Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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