94.
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have

95.
The compressive strength of cement should not be less than about 110 Kg/cm2 after three days & not less than 170 Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2/gm.

97.
Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

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