Construction Materials

141) Excessive free lime and excessive magnesia present in the cement make the cement

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unsound

142) The dry process of manufacturing cement has become obsolete, because, in comparison to wet process

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the quality of cement produced by it is inferior

143) The aggregate is called the cyclopean aggregate if its size is

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75 mm to 150 mm

144) The process of applying cement mortar under pressure through a nozzle is called

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guniting

145) Pointing is the process whereby

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the masonry joints are filled up with mortar after raking out for small depth

146) The purpose of pointing is

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all the above

147) The strength of cement Concrete for a given mix depends on

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water-cement ratio

148) The process of keeping concrete wet to enable it to attain full strength is known

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curing

149) The ingredient which gives the desired colour to a paint is called

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pigment

150) The most commonly used substance as a vehicle in the oil paints is

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linseed oil

Subject Notes

Objective Box

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