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- Question
For the construction of cement con-certe dams, the maximum permissible size of the aggregates, is
Options- A. 40 mm
- B. 50 mm
- C. 60 mm
- D. 70 mm
- E. 80 mm
- Correct Answer
- 40 mm
- 1. Water cement ratio is
Options- A. volume of water to that of cement
- B. weight of water to that of cement
- C. weight of concrete to that of water
- D. volume of concrete to that of water
- E. both (a) and (b) of the above. Discuss
- 2. Workability of concrete mix with low water cement ratio is determined by
Options- A. tensile strength test
- B. slump test
- C. compaction factor test
- D. flexural strength test
- E. none of these. Discuss
- 3. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. seive No. 9, more than
Options- A. 5%
- B. 10%
- C. 15%
- D. 20%
- E. 25% Discuss
- 4. Separation of water or water sand cement from a freshly concrete, is known
Options- A. bleeding
- B. creeping
- C. segregation
- D. flooding
- E. none of these. Discuss
- 5. To obtain a very high strength concrete, use very fine grained
Options- A. Granite
- B. Magnetite
- C. Barite
- D. Volcanic scoria. Discuss
- 6. Permissible compressive strength of M 150 concrete grade is
Options- A. 100 kg/cm2
- B. 150 kg/cm2
- C. 200 kg/cm2
- D. 250 kg/cm2
- E. 300 kg/cm2 Discuss
- 7. Pick up the correct statement from the following:
Options- A. An increase in water content must be accompanied by an increase in cement content
- B. Angular and rough aggregates reduce the workability of the concrete
- C. Large size aggregates increase the workability due to lesser surface area
- D. The slump of the concrete mix decreases due to an increase in temperature
- E. All the above. Discuss
- 8. The top diameter, bottom diameter and the height of a slump mould are :
Options- A. 10 cm, 20 cm, 30 cm
- B. 10 cm, 30 cm, 20 cm
- C. 20 cm, 10 cm, 30 cm
- D. 20 cm, 30 cm, 10 cm
- E. 30 cm, 20 cm, 10 cm Discuss
- 9. For concreting tunnel linings, tran-portation of concrete is done by
Options- A. pans
- B. wheel borrows
- C. containers
- D. pumps
- E. belt conveyors. Discuss
- 10. The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as
Options- A. low-heat Portland cement
- B. rapid hardening Portland cement
- C. Portland blast slag cement
- D. Portland pozzolana cement
- E. none of these. Discuss
Concrete Technology problems
Search Results
Correct Answer: both (a) and (b) of the above.
Correct Answer: compaction factor test
Correct Answer: 10%
Correct Answer: bleeding
Correct Answer: Granite
Correct Answer: 150 kg/cm2
Correct Answer: All the above.
Correct Answer: 10 cm, 20 cm, 30 cm
Correct Answer: pumps
Correct Answer: low-heat Portland cement
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