Civil Engineering - Building Materials

26.
Which one of the following is acid resistant asbestos:
actinolite asbestos
amosite asbestos
anthophylite asbestos
crocidolite asbestos
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
Due to attack of dry rot, the timber
cracks
shrinks
reduces to powder
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
Brittleness of cold is due to an excess of
sulphur
carbon
phosphorus
silicon.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
For the manufacture of Portland cement, the proportions of raw materials used, are
lime 63% ; silica 22% ; other ingredients 15%
lime 22% ; silica 63% ; other ingredients 15%
silica 40% ; lime 40% ; other ingredients 20%
silica 70% ; lime 20% ; other ingredients 10%.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
Asbestos cement
is brittle
warps due to changes in humidity
strength is lowered when saturated by water
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.