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31
The commonly used color pigment in paints, is
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Answer: Option D
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32
The rocks having alumina or clay as their major constituents are known as
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Answer: Option B
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33
The harmonious mixing of the clay ingredients, is known as
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Answer: Option B
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34
The basic purpose of a retarder in concrete is
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Answer: Option A
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35
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
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Answer: Option C
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36
Which of the following is the purest form of iron?
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Answer: Option B
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37
The most common admixture which is used to accelerate the initial set of concrete is
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Answer: Option B
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38
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
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Answer: Option A
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39
Fibre glass
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Answer: Option D
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40
The base material for distemper, is
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Answer: Option A
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