is brittle
warps due to changes in humidity
strength is lowered when saturated by water
all the above
Correct answer is D
No explanation has been provided for this answer.
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%
Correct answer is A
No explanation has been provided for this answer.
Brittleness of cold is due to an excess of
sulphur
carbon
phosphorus
silicon
Correct answer is C
No explanation has been provided for this answer.
Due to attack of dry rot, the timber
cracks
shrinks
reduces to powder
none of these
Correct answer is C
No explanation has been provided for this answer.
Which one of the following is acid resistant asbestos
actinolite asbestos
amosite asbestos
anthophylite asbestos
crocidolite asbestos
All the above
Correct answer is E
No explanation has been provided for this answer.