Building Materials MCQs Practice Set

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/m² (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/m² (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 %

48. 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 %

65. .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

• 300^oC to 500^oC
• 500^oC to 700^oC
• 700^oC to 1000^oC
• 1000^oC to 1200^oC (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

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

106. 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

117. 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

120. 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 cm² /g) of a good Portland cement should not be less than

• 500
• 1100
• 2250 (Ans)
• 3200

133. The expansion of Portland cement is caused by

• Free lime
• Magnesia
• Silica
• Both (b) and (c)

134. 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 /m² (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

141. 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)

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

• 7 days
• 14 days
• 21 days
• 28 days (Ans)

154. According to Indian standard specifications,the temperature for curing is

• 5^oC
• 10^oC
• 27^oC (Ans)
• 42^oC

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

159. 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

164. 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

169. 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

181. 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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