Concrete Technology problems
- 1. Di-calcium silicate (C2S)
Options- A. hydrates rapidly
- B. generates less heat of hydration
- C. hardens rapidly
- D. provides less ultimate strength to cement
- E. has less resistance to sulphate attack. Discuss
Correct Answer: generates less heat of hydration
- 2. The concrete mix which causes difficulty in obtaining a smooth finish, possess
Options- A. segregation
- B. internal friction
- C. hardness
- D. bleeding
- E. none of these. Discuss
Correct Answer: hardness
- 3. 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
Correct Answer: all the above.
- 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
Correct Answer: all the above.
- 5. 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
Correct Answer: All the above.
- 6. 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
Correct Answer: all the above.
- 7. 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
Correct Answer: soundness of cement
- 8. Sands of zone I are
Options- A. coarse
- B. medium
- C. medium to fine
- D. fine. Discuss
Correct Answer: coarse
- 9. 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
Correct Answer: all the above.
- 10. 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
Correct Answer: sodium carbonates and bicarbonates
More in Civil Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.