Building Materials - Section 7 Multiple Questions and Answers.




6.If the ore impurities is
A. clay, lime stone is used as flux
B. lime stone, clay is used as flux
C. quartz, lime stone and argallaceous iron ores are used as flux
D. All the above.

7.The plastics prepared from Vinyl resin are
A. odourless
B. non-toxic
C. transparent
D. all of these.

8.Chlorite, a green colour mineral is mainly derived from the decomposition of
A. augite
B. biotite
C. horn blende
D. All of these.

9.During smelting process, the combination of fuel in the furnace
A. forms carbon dioxide
B. carbon dioxide with carbon forms carbon mono-oxide
C. carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
D. all the above.

10.Lime stones are generally known as
A. aqueous rocks
B. sedimentary rocks
C. stratified rocks
D. all the above.

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