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1 . In a mortar, the binding material is
A. cement B. sand
C. surkhi D. cinder.

2 . Lacquer paints
A. are generally applied on structural steel
B. are less durable as compared to enamel paints
C. consist of resin and nitro-cellulose
D. all the above.

3 . Wrought iron contains carbon upto
A. 0.25%
B. 1.0%
C. 1.5%
D. 2%.

4 . Pick up the polymineralic rock from the following:
A. Quartz sand
B. Pure gypsum
C. Magnesite
D. Granite

5 . Pick up the correct statement from the following:
A. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
B. For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
C. For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
D. All the above.




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