102 Construction Materials Chapter Wise McQ Test of 25 Question #12 Construction Materials Chapter Wise McQ Test of 25 Question for PSC, NEC, UPSC, SSC and Many more. 1 / 25 1. The cement becomes useless, if it absorbed moisture more than: A. 2% B. 3% C. 4% D. 5% 2 / 25 2. The material which are added in cement mortar or concrete to improve upon their quality is called A. qualifier B. improver C. gypsum D. admixture 3 / 25 3. What do you mean by admixtures? A. Ingredients which are added to in cement before or after concrete mix B. Ingredients which are added to make aggregates healthier C. Ingredients added in cement to make it shinier D. Ingredients added in concrete to make good workability 4 / 25 4. Accelerator used as admixture in cement A. increases rate of hydration B. decreases rate of hydration C. makes concrete water proof D. all of the above 5 / 25 5. The presence of calcium chloride in water A. accelerates setting of cement B. accelerates hardening of cement C. causes little effect on quality of concrete D. all of these 6 / 25 6. Most commonly used accelerator for concreting is A. Gypsum B. Calcium chloride C. Calcium oxide D. Calcium sulphate 7 / 25 7. The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is A. 1 B. 2 C. 3 D. 4 8 / 25 8. Accelerators are used in concrete for______ A. Earlier removal of the form work B. Reduction of required period of curing C. Earlier replacement of structure in service D. All of the above 9 / 25 9. The excess quantity of Calcium chloride (CaCl2> 2), Triethanolamine (>0.06%) admixture behaves like a A. Accelerator B. Retarder C. Both (a) and (b) of above D. None of above 10 / 25 10. Retarder is used in concreting in A. cold weather B. hot weather C. both of above D. none of above 11 / 25 11. The basic purpose of a retarder in concrete is A. to increase the initial setting time of cement paste in concrete B. to decrease the initial setting time of cement paste in concrete C. to render the concrete more water tight D. to improve the workability of concrete mix 12 / 25 12. Sugar is A. accelerator for concrete B. retarder for concrete C. water proofer D. air entraining agent 13 / 25 13. The most commonly used retarder in cement is A. Gypsum B. Calcium chloride C. Calcium carbonate D. None of above 14 / 25 14. The possibility of bleeding, segregation and laitance is reduced by A. Colouring agent B. Bleeding agent C. Water proofer D. Air entraining agent 15 / 25 15. The breaking up of cohesion in a mass of concrete is called A. workability B. bleeding C. segregation D. creep 16 / 25 16. Separation of water on fresh concrete is known as A. segregation B. hydration C. bleeding D. none of above 17 / 25 17. The property of concrete in which the water tends to rise to the surface while placing and compacting is called A. segregation B. bleeding C. bulking D. creep 18 / 25 18. Badly mixed concrete results in A. segregation B. bleeding C. honey combing D. none of above 19 / 25 19. Pick up the air entraining agent from the following: A. Animal fats B. Natural wood resigns C. Alkali salts D. All of the above 20 / 25 20. Workability of concrete can be improved by the addition of ____ A. Iron B. Sodium C. Zinc D. Sulphur 21 / 25 21. Pozzolanic properties exist in A. shales B. fly ash C. pumicite D. all of the above 22 / 25 22. Byproduct of coal is called A. surkhi B. fly ash C. lime D. cement 23 / 25 23. The main constituent of fly-ash, is A. aluminium oxide B. silica C. ferrous oxide D. All of these 24 / 25 24. …………. is added to make white concrete A. fly ash B. metakaoline C. rice husk D. pigment 25 / 25 25. Admixture is added in concrete A. to increase or decrease rate of hydration B. to improve workability of concrete C. to make concrete imperbiable D. All of the above Your score is The average score is 54% 0% Restart quiz Exit civil engineerconstruction materialsmcq civilmock testnecpscsub engineerupsc
