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- Question
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.
- Correct Answer
- rounded aggregate
- 1. 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
- 2. 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
- 3. Slump test of concrete is a measure ofits
Options- A. consistency
- B. compressive strength
- C. tensile strength
- D. impact value. Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. The type of aggregates of same nominal size, which contain less voids when compacted, are
Options- A. rounded spherical
- B. irregular
- C. flaky
- D. none of these. Discuss
- 10. The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is
Options- A. 100 kg/cm2
- B. 150 kg/cm2
- C. 200 kg/cm2
- D. 250 kg/cm2
- E. 300 kg/cm2 Discuss
Concrete Technology problems
Search Results
Correct Answer: concrete specimens may be tested at any temperature
Correct Answer: all the above.
Correct Answer: consistency
Correct Answer: 1 : 2 : 4
Correct Answer: Both (c) and (d).
Correct Answer: In single size aggregates, bulk density is maximum
Correct Answer: all the above.
Correct Answer: decreases the strength of concrete
Correct Answer: rounded spherical
Correct Answer: 150 kg/cm2
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