Q. Workability of concrete is measured by

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Q. The rock which is not calcareous, is :

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Q. For quality control of Portland cement, the test essentially done is

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Q. If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

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Q. Under normal conditions using an ordinary cement, the period of removal of the form work, is :

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Q. Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor Wp/Wf is 0.95, the workability of concrete is

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Q. For given water content, workability decreases if the concrete aggregates contain an excess of

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Q. Internal friction between the ingredients of concrete, is decreased by using

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Q. For road pavements, the cement generally used, is

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Q. Construction joints are generally provided in concrete

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Q. M10 grade of concrete approximates

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Q. For ensuring quality of concrete, use

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Q. According to I.S. : 456, the number of grades of concrete mixes, is

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Q. The mixture of different ingredients of cement, is burnt at

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Q. The risk of segregation is more for

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Q. After casting, an ordinary cement concrete on drying

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Q. Hydration of cement is due to chemical action of water with

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Q. To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between

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Q. Permissible compressive strength of M 300 concrete grade is

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Q. The standard sand now a days used in India, is obtained from

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