162. Putty is
A. made with finely powdered chalk and linseed oil
B. used for fixing glass panes
C. softened by a solution of pearl ash and quick-lime soaked in water
D. all the above.

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163. Bitumen in
A. solid state, is called asphalt
B. semi fluid-state, is called mineral tar
C. fluid state, is called petroleum
D. all the above.

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164. Mastic asphalt is
A. water proof
B. fire proof
C. elastic
D. all the above.

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165. According to ISI, bitumen is classified into
A. 2 grades
B. 4 grades
C. 6 grades
D. 10 grades.

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166. Bitumen is generally obtained from
A. organic material
B. synthetic material
C. petroleum product
D. coal.

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167. Bitumen may be dissolved in
A. carbondioxide
B. water
C. sodium chloride
D. carbon disulphide

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168.  Plastic bitumen is generally used for
A. road pavements
B. expansion joints
C. crack fillings
D. none to these.

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