| 1. | The quarrying of stone by the method of wedging is successfully carried out in ? | |
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sandstones
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limestones
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marbles
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all of these
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Report Question| 2. | The wood generally used for railway sleepers is ? | |
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mango
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kail
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babul
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deodar
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| 3. | The alkaline salt present in the bricks, absorbs moisture from the air which on drying ? | |
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leaves pores and makes the bricks porous
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leaves high powder deposit on the brick
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makes the bricks brittle and weak
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all of these
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| 4. | The lime which consists almost entirely of calcium oxide, is called ? | |
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poor lime
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rich lime
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hydraulic lime
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limestone
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| 5. | The advantage of adding pozzolana (or surkhi) to lime is to ? | |
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reduce shrinkage
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increase resistance to cracking
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increase resistance to chemical attack
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all of these
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| 6. | The setting and hardening of cement paste is mainly due to the hydration and hydrolysis of ? | |
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tri-calcium silicate
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di-calcium silicate
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tri-calcium aluminate
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all of these
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| 7. | Le-chatelier method is used to determine ? | |
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initial setting of cement
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fineness of cement
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soundness of cement
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normal consistency of cement
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| 8. | Granite is mainly composed of ? | |
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quartz and mica
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felspar and mica
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quartz and felspar
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quartz, felspar and mica
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| 9. | Which of the following statement is correct ? | |
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The sand used for making mortar should be fine
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The rounded grains of sand produce a strong mortar
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The mortar made with coarse sand is stronger than the one made with fine stand
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all of the above
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| 10. | The workability of cement concrete can be improved by ? | |
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increasing the quantity of cement
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increasing the proportion of coarse aggregate
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increasing the quantity of sand
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all of the above
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