Concrete Technology problems
- 1. Hydration of cement is due to chemical action of water with
Options- A. Tricalcium silicate and dicalcium silicate
- B. Dicalcium silicate and tricalcium aluminate
- C. Tricalcium aluminate and tricalcium alumino ferrite
- D. All the above. Discuss
Correct Answer: All the above.
- 2. Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor
is 0.95, the workability of concrete is
Options- A. extremely low
- B. very low
- C. low
- D. high
- E. none of these. Discuss
Correct Answer: high
- 3. The commonly used material in the manufacture of cement is
Options- A. sand stone
- B. slate
- C. lime stone
- D. graphite. Discuss
Correct Answer: lime stone
- 4. Slump test is done for
Options- A. clay
- B. sand
- C. lime
- D. concrete. Discuss
Correct Answer: concrete.
- 5. Internal friction between the ingredients of concrete, is decreased by using
Options- A. less water
- B. fine aggregates
- C. rich mix
- D. more water and coarse aggregates
- E. none of these. Discuss
Correct Answer: more water and coarse aggregates
- 6. If 20 kg of coarse aggregate is sieved through 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron and 150 micron standard sieves and the weights retained are 0 kg, 2 kg, 8 kg, 6 kg, 4 kg respectively, the fineness modulus of the aggregate, is
Options- A. 7.30
- B. 7.35
- C. 7.40
- D. 7.45
- E. none of these. Discuss
Correct Answer: 7.40
- 7. The mixture of different ingredients of cement, is burnt at
Options- A. 1000°C
- B. 1200°C
- C. 1400°C
- D. 1600°C
- E. 1800°C Discuss
Correct Answer: 1400°C
- 8. The ratio of the length to breadth of a wooden float, is
Options- A. 4.5
- B. 5.5
- C. 6.5
- D. 7.5
- E. 8.5 Discuss
Correct Answer: 7.5
- 9. The risk of segregation is more for
Options- A. wetter mix
- B. larger proportion of maximum size aggregate
- C. coarser grading
- D. all the above. Discuss
Correct Answer: all the above.
- 10. For given water content, workability decreases if the concrete aggregates contain an excess of
Options- A. thin particles
- B. flat particles
- C. elongated particles
- D. flaky paticles
- E. all the above. Discuss
Correct Answer: all the above.
More in Civil Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.