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
Related Mcqs:
- The most commonly used retarder in cement is_________________?
A. gypsum
B. calcium chloride
C. calcium carbonate
D. none of the above - The slump recommended for mass concrete is about_______________?
A. 25 mm to 50 mm
B. 50 mm to 100 mm
C. 100 mm to 125 mm
D. 125 mm to 150 mm - Which of the following cements is suitable for use in massive concrete structures such as large dams ?
A. ordinary Portland cement
B. low heat cement
C. rapid hardening cement
D. sulphate resisting cement - The most common admixture which is used to accelerate the initial set of concrete is______________?
A. gypsum
B. calcium chloride
C. calcium carbonate
D. none of the above - Proper amount of entrained air in concrete results in__________?
1. better workability
2. better resistance to freezing and thawing
3. lesser workability
4. less resistance to freezing and thawing The correct answer is:A. (1) and (2)
B. (1)and(4)
C. ((2)and (3)
D. (3)and (4) - Granite is not suitable for ordinary building purpose because_______________?
A. it can not be polished
B. it is not a fire proof material
C. it is costly
D. it has less crushing strength - The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is_______________?
A. segmental arch
B. pointed arch
C. relieving arch
D. flat arch - Three basic raw materials which are needed in large quantities for production of steel are_______________?
A. iron ore, coal and sulphur
B. iron ore, carbon and sulphur
C. iron ore, coal and lime stone
D. iron ore, carbon and lime stone - The predominant constituent which is responsible for strength in granite is_____________?
A. quartz
B. feldspar
C. mica
D. none of the above - Minimum thickness of wall where single flemish bond can be used is_____________?
A. half brick thick
B. one brick thick
C. one and a half bricks thick
D. two bricks thick
