Concrete Technology problems
- 1. M 150 grade of concrete approximates
Options- A. 1 : 3 : 6 mix
- B. 1 : 1 :2 mix
- C. 1 : 2 : 4 mix
- D. 1 : 1.5 : 3 mix
- E. none of these. Discuss
Correct Answer: 1 : 1 :2 mix
- 2. For ensuring quality of concrete, use
Options- A. single sized aggegates
- B. two sized aggregate
- C. graded aggregates
- D. coarse aggregates. Discuss
Correct Answer: graded aggregates
- 3. Proper proportioning of concrete, ensures
Options- A. desired strength and workability
- B. desired durability
- C. water tightness of the structure
- D. resistance to water
- E. all the above. Discuss
Correct Answer: all the above.
- 4. Pick up the correct statement from the following:
Options- A. The weight of ingredients of concrete mix, is taken in kilograms
- B. Water and aggregates are measured in litres
- C. The finished concrete is measured in cubic metres
- D. 20 bags of cement make one tonne
- E. All the above. Discuss
Correct Answer: All the above.
- 5. Workability improved by adding
Options- A. air-entraining agent
- B. foaming agent
- C. oily-agent
- D. aluminium compound
- E. all the above. Discuss
Correct Answer: all the above.
- 6. Concrete mainly consists of
Options- A. cement
- B. aggregates
- C. admixture
- D. water
- E. all the above. Discuss
Correct Answer: all the above.
- 7. Permissible compressive strength of M 300 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
Correct Answer: 300 kg/cm2
- 8. Construction joints are provided
Options- A. where B.M. and S.F. are small
- B. where the member is supported by other member
- C. at 18 m apart in huge structures
- D. in concrete wall at sill level of windows
- E. all the above. Discuss
Correct Answer: all the above.
- 9. The high strength of rapid hardening cement at early stage, is due to its
Options- A. finer grinding
- B. burning at high temperature
- C. increased lime cement
- D. higher content of tricalcium. Discuss
Correct Answer: increased lime cement
- 10. The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known
Options- A. grading
- B. curing
- C. mixing
- D. batching
- E. none of these. Discuss
Correct Answer: batching
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