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- Question
Sands of zone I are
Options- A. coarse
- B. medium
- C. medium to fine
- D. fine.
- Correct Answer
- coarse
- 1. Le-Chatelier's apparatus is used for testing
Options- A. soundness of cement
- B. hardness of cement
- C. strength of cement
- D. durability of cement. Discuss
- 2. If a grading curve is horizontal bet-wen the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain
Options- A. 20 mm particles
- B. 10 mm particles
- C. 4.75 mm particles
- D. all the above. Discuss
- 3. Pick up the correct statement from the following:
Options- A. The bulk density of fine aggregate is usually about 10 per cent more than that of coarse aggregate of similar composition
- B. The specific gravity of aggregate is important for the determination of the moisture content
- C. The absorption and porosity of an aggregate influence the property of the concrete
- D. A highly absorptive aggregate reduces the workability of concrete considerably
- E. All the above. Discuss
- 4. The aggregate impact value of the aggregate used in
Options- A. building concrete is less than 45
- B. road pavement concrete is less than 30
- C. runway concrete is less than 30
- D. all the above. Discuss
- 5. The specifications of a cement bag for storage, are
Options- A. weight 50 kg
- B. height 18 cm
- C. plan area 3000 sq. cm
- D. volume 35 litres
- E. all the above. Discuss
- 6. The lower water cement ratio in concrete, introduces
Options- A. smaller creep and shrinkage
- B. greater density and smaller permeability
- C. improved frost resistance
- D. greater wear resistance and improved bond strength
- E. all the above. Discuss
- 7. The impurity of mixing water which affects the setting time and strength of concrete, is
Options- A. sodium sulphates
- B. sodium chlorides
- C. sodium carbonates and bicarbonates
- D. calcium chorides
- E. calcium bicarbonates Discuss
- 8. On a grading curve, the gap grading is represented by
Options- A. a horizontal line
- B. a vertical line
- C. N.W. inclined line
- D. N.E. inclined line
- E. none of these. Discuss
- 9. The cement becomes useless if its absorbed moisture content exceeds
Options- A. 1%
- B. 2%
- C. 3%
- D. 4%
- E. 5% Discuss
- 10. Pick up the incorrect statement from the following:
Options- A. With passage of time, the strength of cement increases
- B. With passage of time, the strength of cement decreases
- C. After a period of 24 months, the strength of cement reduces to 50%
- D. The concrete made with storage deteriorated cement, gains strength with time
- E. None of these. Discuss
Concrete Technology problems
Search Results
Correct Answer: soundness of cement
Correct Answer: all the above.
Correct Answer: All the above.
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: sodium carbonates and bicarbonates
Correct Answer: a horizontal line
Correct Answer: 5%
Correct Answer: With passage of time, the strength of cement increases
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