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Civil Engineering - Building Materials

Exercise : Building Materials - Section 2
26.
Inhaling of fly-ash over a long period causes
silicosis
fibrosis of lungs
bronchitis
pneumonitis
All of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Minimum required water cement ratio for a workable concrete, is
0.30
0.40
0.50
0.60
1.0.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
sedimentary rocks
igneous rocks
metamorphic rocks
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The compound of Portland cement which contributes to the strength after two to three years is
Tricalcium silicate
Di-calcium silicate
Tricalcium aluminate
Tetracalcium alumino ferrite.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
For slaking of 10 kg of CaO, the theoretical amount of water is
2.2 kg
1.5 kg
3.2 kg
None of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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