Concrete Technology problems
- 1. 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
Correct Answer: All the above.
- 2. 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
Correct Answer: Both (c) and (d).
- 3. 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. Discuss
Correct Answer: 1 : 2 : 4
- 4. Slump test of concrete is a measure ofits
Options- A. consistency
- B. compressive strength
- C. tensile strength
- D. impact value. Discuss
Correct Answer: consistency
- 5. 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
Correct Answer: all the above.
- 6. 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
Correct Answer: concrete specimens may be tested at any temperature
- 7. 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
Correct Answer: rounded aggregate
- 8. 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
Correct Answer: In single size aggregates, bulk density is maximum
- 9. For preparing a test-specimen, it is necessary
Options- A. to mix cement and fine aggregate by dry hand
- B. to mix coarse aggregates
- C. to mix water to the cement, fine aggregates and coarse aggregates
- D. to oil inner surface of the mould and the base plate, before placing concrete
- E. all the above. Discuss
Correct Answer: all the above.
- 10. High temperature
Options- A. increases the strength of concrete
- B. decreases the strength of concrete
- C. has no effect on the strength of concrete
- D. none of these. Discuss
Correct Answer: decreases the strength of concrete
More in Civil Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.