500 Best Building Materials MCQ
Q25). Kaolin is chemically classified as
a).metamorphic rock
b).argillaceous rock
c).calcareous rock
d).silicious rock.
Correct Answer:
argillaceous rock
Explanation:
Q26). Which one of the following is acid resistant asbestos:
a).actinolite asbestos
b).amosite asbestos
c).anthophylite asbestos
d).All the above.
Correct Answer:
All the above.
Explanation:
Q27). Due to attack of dry rot, the timber
a).cracks
b).shrinks
c).reduces to powder
d).none of these.
Correct Answer:
reduces to powder
Explanation:
Q28). Brittleness of cold is due to an excess of
a).sulphur
b).carbon
c).phosphorus
d).silicon.
Correct Answer:
phosphorus
Explanation:
Q29). For the manufacture of Portland cement, the proportions of raw materials used, are
a).lime 63% ; silica 22% ; other ingredients 15%
b).lime 22% ; silica 63% ; other ingredients 15%
c).silica 40% ; lime 40% ; other ingredients 20%
d).silica 70% ; lime 20% ; other ingredients 10%.
Correct Answer:
lime 63% ; silica 22% ; other ingredients 15%
Explanation:
Q30). Asbestos cement
a).is brittle
b).warps due to changes in humidity
c).strength is lowered when saturated by water
d).all the above.
Correct Answer:
all the above.
Explanation:
Q31). Gniess is obtained from
a).igneous rocks
b).metamorphic rocks
c).sedimentary rocks
d).sedimentary metamorphic rocks.
Correct Answer:
sedimentary metamorphic rocks.
Explanation:
Q32). The rocks formed by gradual deposition, are called
a).sedimentary rocks
b).igneous rocks
c).metamorphic rocks
d).none of these.
Correct Answer:
sedimentary rocks
Explanation: