Building Materials

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

1. Clay
2. Feldspar
3. Quartz
4. All of these

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

1. Increases
2. Decreases
3. First increases to a certain maximum value and then decreases
4. First decreases to a certain minimum value and then increases

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103. Pick up the correct statement from the following:

1. Soft stones are required for carving
2. Light stones are required for arches
3. Hard stones are required to stand high pressure
4. All the above

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104. As per IS specifications, the maximum final setting time for ordinary Portland cement should be

1. 30 minutes
2. 1 hour
3. 6 hours
4. 10 hours

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105. Shingle is

1. Decomposed laterite
2. Crushed granite
3. Water bound pebbles
4. Air weathered rock

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106. Proper amount of entrained air in concrete results in
(i) Better workability
(ii) Better resistance to freezing and thawing
(iii) Lesser workability
(iv) Less resistance to freezing and thawing
The correct answer is

1. (i) and (ii)
2. (i) and (iv)
3. (ii) and (iii)
4. (iii) and (iv)

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107. Pick up the correct statement from the following: Method of sawing timber

1. Tangentially to annual rings, is known as tangential method
2. In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
3. Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
4. All the above

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108. Assertion A : Paints with white lead base are not recommended for painting of iron works. Reason R : Paints with white lead base do not check rusting of iron. Select your answer according to the coding system given below:

1. Both A and R is true and, R is the correct explanation of A
2. Both A and R is true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

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109. Pick up the correct statement from the following:

1. Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
2. Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
3. Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
4. All the above

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110. Expansion Joints in masonry walls are provided in wall lengths usater than

1. 10 m
2. 20 m
3. 30 m
4. 40 m

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