Discussion
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- Question
A concrete having a slump of 6.5 cm, is said to be
Options- A. dry
- B. earth moist
- C. semi-plastic
- D. plastic
- E. none of these.
- Correct Answer
- plastic
- 1. The entrained air in concrete
Options- A. increases workability
- B. decreases workability
- C. decreases resistance to weathering
- D. increases strength
- E. neither affects workability nor strength. Discuss
- 2. Non-uniform compaction may cause the concrete
Options- A. porous
- B. non-homogeneous
- C. reduced strength
- D. all the above. Discuss
- 3. Pick up the incorrect statement from the following:
Options- A. Admixtures accelerate hydration
- B. Admixtures make concrete water proof
- C. Admixtures make concrete acid proof
- D. Admixtures give high strength
- E. None of these. Discuss
- 4. If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is
Options- A. M 100
- B. M 150
- C. M 200
- D. M 250
- E. M 300 Discuss
- 5. Gypsum is added for
Options- A. colour
- B. strength
- C. controlling setting time
- D. none of these. Discuss
- 6. Pick up the incorrect statement from the following. While performing preliminary test on concrete
Options- A. proportions of the material and water should be the same as to be used at the work site
- B. cement should be mixed by hand in order to maintain uniformity
- C. concrete mix should be stored in air-tight containers
- D. concrete ingredients should be kept at a temperature of 37° ± 2°C
- E. none of these. Discuss
- 7. For preparing ordinary concrete, the quantity of water used, is
Options- A. 5% by weight of aggregates plus 20% of weight of cement
- B. 10% by weight of aggregates plus 10% of weight of cement
- C. 5% by weight of aggregates plus 30% of weight of cement
- D. 30% by weight of aggregates plus 10% of weight of cement
- E. none of these. Discuss
- 8. Cement used for normal concrete construction, is obtained by burning a mixture of
Options- A. silicious and argillaceous materials
- B. argilaceous and calcareous materials
- C. silicious and catcareous materials
- D. silicious, argillaceous and calcareous materials
- E. none of these. Discuss
- 9. Permissible compressive strength of M 200 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
- 10. The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be
Options- A. between 150 to 300 kg/cm2
- B. between 350 to 600 kg/cm2
- C. between 150 to 500 kg/cm2
- D. below 200 kg/cm2
- E. none of these. Discuss
Concrete Technology problems
Search Results
Correct Answer: increases workability
Correct Answer: all the above.
Correct Answer: Admixtures accelerate hydration
Correct Answer: M 100
Correct Answer: controlling setting time
Correct Answer: concrete ingredients should be kept at a temperature of 37° ± 2°C
Correct Answer: 5% by weight of aggregates plus 30% of weight of cement
Correct Answer: silicious, argillaceous and calcareous materials
Correct Answer: 200 kg/cm2
Correct Answer: below 200 kg/cm2
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