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- Question
For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is
Options- A. 1 : 3 : 6
- B. 1 :
: 3 - C. 1 : 2 : 4
- D. 1 : 1 : 2
- E. 1 : 4 : 8.
- Correct Answer
- 1 : 2 : 4
- 1. Pick up the correct statement from the following:
Options- A. Calcium chloride acts as a retarder
- B. Gypsum (calcium sulphate) acts as an accelerator
- C. Gypsum (calcium sulphate) acts as a retarder
- D. Calcium chloride acts as an accelerator
- E. Both (c) and (d). Discuss
- 2. Pick up the correct statement from the following:
Options- A. High percentage of C3S and low percentage of C2S cause rapid hardening
- B. High percentage of C3S and low percentage of C2S make the cement less resistive to chemical attack
- C. Low percentage of C3S and high percentage of C2S contribute to slow hardening
- D. Low percentage of C3S and high percentage of C2S provide greater resistance to chemical attack
- E. All the above. Discuss
- 3. If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed
Options- A. 10 cm
- B. 15 cm
- C. 20 cm
- D. 25 cm
- E. 30 cm Discuss
- 4. The commercial name of white and coloured cement in India, is
Options- A. colocrete
- B. rainbow cement
- C. silvicrete
- D. snowcem
- E. all the above. Discuss
- 5. The aggregate containing moisture in pores and having its suface dry, is known as
Options- A. moist aggregates
- B. very dry aggregates
- C. dry aggregates
- D. saturated surface dry aggregate
- E. none of these. Discuss
- 6. Slump test of concrete is a measure ofits
Options- A. consistency
- B. compressive strength
- C. tensile strength
- D. impact value. Discuss
- 7. The void ratio of
Options- A. single size coarse aggregate is roughly 0.45.
- B. graded coarse aggregate is roughly 0.040
- C. fine aggregate is roughly 0.45
- D. all the above. Discuss
- 8. The condition not applicable to water cement ratio law, is
Options- A. internal moisture conditions on hydration continue till complete strength is gained
- B. concrete specimens may be tested at any temperature
- C. concrete specimens need be of same age
- D. concrete specimens need be of same size
- E. none of these. Discuss
- 9. The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is
Options- A. rounded aggregate
- B. irregular aggregate
- C. angular aggregate
- D. flaky aggregate
- E. none of these. Discuss
- 10. Pick up the incorrect statement from the following:
Options- A. In properly graded aggregates, bulk density is more
- B. In single size aggregates, bulk density is least
- C. In single size aggregates, bulk density is maximum
- D. None of these. Discuss
Concrete Technology problems
Search Results
Correct Answer: Both (c) and (d).
Correct Answer: All the above.
Correct Answer: 20 cm
Correct Answer: all the above.
Correct Answer: saturated surface dry aggregate
Correct Answer: consistency
Correct Answer: all the above.
Correct Answer: concrete specimens may be tested at any temperature
Correct Answer: rounded aggregate
Correct Answer: In single size aggregates, bulk density is maximum
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