Civil Engineering - Building Materials

1.
Pick up the correct statement from the following:
The percentage of absorption for firebricks varies from 5 to 10
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
The compressive strength of silica bricks is about 150 kg/cm2
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Spirit varnish generally consists of
oil, wax and resin
alcohol, wax and turpentine
pigment and synthetic resin
spirit and shellac
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
Pick up the correct statement from the following:
Roasting is not necessary if iron ore is an oxide
Impurities float on the molten iron as slag
The slag contains lime about 45%
The molten iron is made to run, in a long channel formed in sand called 'sow'
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
The tendency of a stone is, to split along:
texture
fracture
cleavage
structure
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
Acrylic is the name of
cellulose resin
alkyd resin
methyl metha crylate
cumarone-indene.
Answer: Option
Explanation:
No answer description is available. Let's discuss.