Building Materials Quiz

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81. Number of bricks required for one cubic meter of brick masonry is:

A) 400
B) 450
C) 500
D) 550

... Answer : C)
Explanation : 500

82. Glazing is used to make earthenware:

A) Hard
B) Soft
C) Porous
D) Impervious

... Answer : D)
Explanation : Impervious

83. Quick lime is:

A) Calcium carbonate
B) Calcium oxide
C) Calcium hydroxide
D) None of the above

... Answer : B)
Explanation : Calcium oxide

84. Quick lime is: 

                             (i) Slow in setting, 

                             (ii) Rapid in slacking, 

                             (iii) Good in strength 

 The correct answer is

A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) Both (ii) and (iii)

... Answer : C)
Explanation : Both(i) and (ii)

85. Assertion A : Pure lime takes a long time develop adequate strength. 

      Reason R : Pure lime has slow hardening characteristics. 

Select your answer according to the coding system given below :

A) Both A and R are true and R is correct explanation of A.
B) Both A and R are true and R is not a correct explanation of A.
C) A is true bur R is false.
D) A is false but R is true.

... Answer : C)
Explanation : A is true bur R is false.

86. Hydraulic lime is obtained by:

A) Burning of lime stone
B) Burning of kankar
C) Adding water to quick lime
D) Calcinations of pure clay

... Answer : B)
Explanation : Burning of kankar

87. The main constituent which imparts hydraulicity to hydraulic lime is:

A) Calcium oxide
B) Silica
C) Clay
D) Water

... Answer : C)
Explanation : Clay

88. Study the following statements: 

(i) Hydraulic lime is suitable for white washing,

(ii) Fat lime is suitable for white washing, 

(iii) Hydraulic lime is suitable for making mortar. 

(iv) Flat lime is suitable for making mortar. 

 

The correct answer is:

A) (i) and (iv)
B) (ii) and (iii)
C) (i) and (ii)
D) (iii) and (iv)

... Answer : B)
Explanation : (ii) and (iii)

89. The main ingredients of Portland cement are:

A) Lime and silica
B) Lime and alumina
C) Silica and alumina
D) Lime and iron

... Answer : A)
Explanation : Lime and silica

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

A) Dicalcium silicate
B) Tricalcium silicate
C) Tricalcium aluminate
D) Tetra calcium alumina ferrite

... Answer : C)
Explanation : Tricalcium aluminate

91. Le Chatelier’s device is used for determining the:

A) Setting time of cement
B) Soundness of cement
C) Tensile strength of cement
D) Compressive strength of cement

... Answer : B)
Explanation : Soundness of cement

92. The main constituent of cement which is responsible for initial setting of cement is:

A) Dicalcium silicate
B) Tricalcium silicate
C) Tricalcium aluminates
D) All of the above

... Answer : C)
Explanation : Tricalcium aluminates

93. The initial setting time for ordinary Portland cement as per IS specification should not be less than:

A) 10 minutes
B) 30 minutes
C) 60 minutes
D) 600 minutes

... Answer : B)
Explanation : 30 minutes

94. As per Is specification the maximum final setting time for ordinary Portland cement should be:

A) 30 minutes
B) 1 hour
C) 6 hours
D) 10 hours

... Answer : D)
Explanation : 10 hours

95. For testing compressive strength of cement the size of cube used is:

A) 50mm
B) 70.6mm
C) 100mm
D) 150mm

... Answer : B)
Explanation : 70.6mm

96. The normal consistency of ordinary Portland cement is about:

A) 10%
B) 20%
C) 30%
D) 40%

... Answer : C)
Explanation : 30%

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

A) Gypsum
B) Finer grinding
C) Tricalcium silicate
D) Tricalcium aluminates

... Answer : B)
Explanation : Finer grinding

98. After storage, the strength of cement:

A) Decreases
B) Increases
C) Remain same
D) May increase or decrease

... Answer : A)
Explanation : Decreases

99. According to IS specification the compressive strength of ordinary Portland cement after three days should not be less than:

A) 7 Mpa
B) 11.5 Mpa
C) 16 Mpa
D) 21 Mpa

... Answer : C)
Explanation : 16 Mpa

100. Additional of pozzolona to ordinary Portland cement increases

A) Bleeding
B) Shrinkage
C) Permeability
D) Heat of hydration

... Answer : B)
Explanation : Shrinkage

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