177 + Mcqs in General Page 2 McqOptions

51.	The alkaline salt present in the bricks, absorbs moisture from the air which on drying
A.	leaves pores and makes the bricks porous
B.	leaves high powder deposit on the brick
C.	makes the bricks brittle and weak
D.	all of these
Answer» C. makes the bricks brittle and weak

Discussion

52.	The compressive strength of felspar is
A.	equal to
B.	less than
C.	more than
Answer» C. more than

Discussion

53.	The commonly base used in a paint is
A.	iron oxide
B.	zinc oxide
C.	titanium white
D.	any one of these
Answer» E.

Discussion

54.	The hand made bricks are
A.	superior
B.	inferior
Answer» B. inferior

Discussion

55.	The advantage of adding pozzolana (or surkhi) to lime is to
A.	reduce shrinkage
B.	increase resistance to cracking
C.	increase resistance to chemical attack
D.	all of these
Answer» E.

Discussion

56.	Argillaceous rocks have their main constituent as
A.	carbonates of lime
B.	clay or alumina
C.	silica or sand
D.	all of these
Answer» C. silica or sand

Discussion

57.	Quick lime on reaction with water gives
A.	hydraulic lime
B.	slaked lime
C.	hydrated lime
D.	poor lime
Answer» C. hydrated lime

Discussion

58.	A limestone found in seams of great thickness in non-crystalline texture with earthy appearance, is called
A.	granular limestone
B.	compact limestone
C.	magnesium limestone
D.	lankar
Answer» C. magnesium limestone

Discussion

59.	The cementing property in cement is mainly due to
A.	lime
B.	silica
C.	iron oxide
D.	alumina
Answer» B. silica

Discussion

60.	The vehicle used in bronze paints is usually
A.	linseed oil
B.	naptha
C.	water
D.	nitro-cellulose lacquer
Answer» E.

Discussion

61.	The process of mixing clay, water and other ingredients to make bricks, is known as
A.	tempering
B.	pugging
C.	kneading
D.	moulding
Answer» D. moulding

Discussion

62.	The rapid hardening Portland cement has a
A.	lower heat of hydration
B.	higher heat of hydration
C.	lower shrinkage coefficient
Answer» C. lower shrinkage coefficient

Discussion

63.	When quarrying is to be done in hard stone and compact rocks, the usual method of quarrying is
A.	by wedging
B.	by channelling machine
C.	by blasting
D.	all of these
Answer» D. all of these

Discussion

64.	Gun cotton is made by saturating cotton with nitric acid.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

65.	The standard size of a masonry brick is 20 cm x 10 cm x 10 cm
A.	Agree
B.	Disagree
Answer» C.

Discussion

66.	The soundness of cement is tested by
A.	air permeability method
B.	Le-chatelier method
C.	Vicat's apparatus
D.	all of these
Answer» C. Vicat's apparatus

Discussion

67.	For railway ballast, the stone should be
A.	soft with a uniform texture
B.	hard, heavy, strong and durable
C.	hard, tough, resistant to abrasion and durable
D.	hard, dense, durable, tough and easily workable
Answer» E.

Discussion

68.	Gneiss is chemically classified as
A.	calcareous rock
B.	argillaceous rock
C.	silicious rock
D.	none of these
Answer» D. none of these

Discussion

69.	The strength of cement concrete is directly proportional to cement-water ratio.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

70.	The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known as
A.	calcination
B.	hydration
C.	slaking
D.	quenching
Answer» D. quenching

Discussion

71.	The chief ingredient of a paint is
A.	alcohol
B.	drier
C.	oil
D.	pigment
Answer» E.

Discussion

72.	Excess of silica in the clay
A.	makes the brick brittle and weak
B.	makes the brick crack and wrap on drying
C.	changes the colour of the brick from red to yellow
D.	improves impermeability and durability of the brick
Answer» B. makes the brick crack and wrap on drying

Discussion

73.	The maximum water-cement ratio for durable concrete is
A.	0.2
B.	0.4
C.	0.6
D.	0.8
Answer» E.

Discussion

74.	The size of mould for bricks should be
A.	equal to
B.	smaller than
C.	larger than
Answer» D.

Discussion

75.	The crushing strength of a stone depends upon its
A.	texture
B.	specific gravity
C.	workability
D.	both (a) and (b)
Answer» E.

Discussion

76.	The best primer used for structural steel work is
A.	white lead
B.	red lead
C.	zinc oxide
D.	iron oxide
Answer» C. zinc oxide

Discussion

77.	The durability of cement concrete is usually improved by
A.	increasing the quantity of coarse sand
B.	increasing the quantity of cement
C.	decreasing the water-cement ratio
D.	decreasing the proportion of fine aggregate
Answer» C. decreasing the water-cement ratio

Discussion

78.	A fine-grained granite
A.	offers higher resistance to weathering
B.	can be easily polished and worked
C.	is used for exterior facing of buildings
D.	all of these
Answer» E.

Discussion

79.	Lime occurs in a free state in nature.
A.	True
B.	False
Answer» C.

Discussion

80.	The wood generally used for railway sleepers is
A.	mango
B.	kail
C.	babul
D.	deodar
Answer» C. babul

Discussion

81.	According to Indian standard specifications, the concrete should be cured under a humidity of
A.	30%
B.	50%
C.	70%
D.	90%
Answer» E.

Discussion

82.	The specific gravity of stone should not, in any case be less than
A.	1
B.	1.5
C.	2
D.	2.5
Answer» E.

Discussion

83.	The burning of bricks in kilns is complete within
A.	12
B.	24
C.	48
D.	96
Answer» C. 48

Discussion

84.	The compressive strength of second elass bricks should bot be less than
A.	7.5 MN/m2
B.	9 MN/m2
C.	10.5 MN/m2
D.	12 MN/m2
Answer» B. 9 MN/m2

Discussion

85.	A good building stone is one which does not absorb more than
A.	5%
B.	10%
C.	15%
D.	25%
Answer» B. 10%

Discussion

86.	The time required for air seasoning of soft wood is
A.	15 to 30 days
B.	30 to 60 days
C.	60 to 90 days
D.	90 to 120 days
Answer» D. 90 to 120 days

Discussion

87.	The compressive strength of a good Portland cement and standard sand mortar after 3 days of curing should not be less than
A.	7 MN/m2
B.	11.5 MN/m2
C.	17.5 MN/m2
D.	21 MN/m2
Answer» C. 17.5 MN/m2

Discussion

88.	The addition of pozzolana to Portland cement causes
A.	less heat of hydration
B.	increase in shrinkage
C.	decrease in permeability
D.	all of these
Answer» E.

Discussion

89.	The drier in an oil paint should not be more than
A.	5%
B.	10%
C.	15%
D.	20%
Answer» C. 15%

Discussion

90.	The greater the percentage of tri-calcium silicate in the cement, the better will be the cement.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

91.	Which of the following constituent, when present in excess quantity in clay causes the bricks to melt and distort during burning?
A.	Alumina
B.	Silica
C.	Lime
D.	Alkalies
Answer» D. Alkalies

Discussion

92.	The hydraulic lime which resembles very much with Portland cement in its chemical composition is called.
A.	feebly hydraulic lime
B.	moderately hydraulic lime
C.	eminently hydraulic lime
D.	none of these
Answer» D. none of these

Discussion

93.	The paint which has high reflective property is
A.	cellulose paint
B.	casein paint
C.	bronze paint
D.	enamel paint
Answer» D. enamel paint

Discussion

94.	The shrinkage of ordinary concrete is about
A.	0.1 to 0.3 mm/m
B.	0.3 to 0.6 mm/m
C.	0.6 to 1.2 mm/m
D.	1.2 to 2.1 mm/m
Answer» C. 0.6 to 1.2 mm/m

Discussion

95.	A limestone containing about 30% of alumina and silica is called
A.	granular limestone
B.	compact limestone
C.	magnesium limestone
D.	kankar
Answer» E.

Discussion

96.	The silicious sandstone which has been subjected to metamorphic action, is called
A.	moorum
B.	laterite
C.	quartzite
D.	dolomite
Answer» D. dolomite

Discussion

97.	The lime which consists almost entirely of calcium oxide, is called
A.	poor lime
B.	rich lime
C.	hydraulic lime
D.	limestone
Answer» C. hydraulic lime

Discussion

98.	The dry process of mixing is usually employed in the manufacture of Portland cement when the raw material is
A.	blast furnace slag
B.	chalk
C.	clay
D.	all of these
Answer» B. chalk

Discussion

99.	The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as
A.	poor lime
B.	rich lime
C.	hydraulic lime
D.	limestone
Answer» B. rich lime

Discussion

100.	The initial setting of cement is caused due to
A.	di-calcium silicate
B.	tri-calcium silicate
C.	tri-calcium aluminate
D.	tri-calcium alumino ferrite
Answer» D. tri-calcium alumino ferrite

Discussion

Explore topic-wise MCQs in Building Materials.

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

The compressive strength of felspar is

The commonly base used in a paint is

The hand made bricks are

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

Argillaceous rocks have their main constituent as

Quick lime on reaction with water gives

A limestone found in seams of great thickness in non-crystalline texture with earthy appearance, is called

The cementing property in cement is mainly due to

The vehicle used in bronze paints is usually

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

The rapid hardening Portland cement has a

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

Gun cotton is made by saturating cotton with nitric acid.

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

The soundness of cement is tested by

For railway ballast, the stone should be

Gneiss is chemically classified as

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

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

The chief ingredient of a paint is

Excess of silica in the clay

The maximum water-cement ratio for durable concrete is

The size of mould for bricks should be

The crushing strength of a stone depends upon its

The best primer used for structural steel work is

The durability of cement concrete is usually improved by

A fine-grained granite

Lime occurs in a free state in nature.

The wood generally used for railway sleepers is

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

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

The burning of bricks in kilns is complete within

The compressive strength of second elass bricks should bot be less than

A good building stone is one which does not absorb more than

The time required for air seasoning of soft wood is

The compressive strength of a good Portland cement and standard sand mortar after 3 days of curing should not be less than

The addition of pozzolana to Portland cement causes

The drier in an oil paint should not be more than

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

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

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

The paint which has high reflective property is

The shrinkage of ordinary concrete is about

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

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

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

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

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

The initial setting of cement is caused due to