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- Question
The maximum amount of dust which may be permitted in aggregates is
Options- A. 5% of the total aggregates for low workability with a coarse grading
- B. 10% of the total aggregates for low workability with a fine grading
- C. 20% of the total aggregates for a mix having high workability with fine grading
- D. all the above.
- Correct Answer
- all the above.
- 1. For quality control of Portland cement, the test essentially done is
Options- A. setting time
- B. soundness
- C. tensile strength
- D. consistency
- E. all the above. Discuss
- 2. Construction joints are generally provided in concrete
Options- A. roads
- B. retaining walls
- C. lining of canals
- D. lining of tunnels
- E. all the above. Discuss
- 3. While compacting the concrete by a mechanical vibrator, the slump should not exceed
Options- A. 2.5 cm
- B. 5.0 cm
- C. 7.5 cm
- D. 10 cm
- E. 15 cm Discuss
- 4. To ensure constant moisture content in aggregates
Options- A. area of each aggregate pile should be large
- B. height of each aggregate pile should not exceed 1.50 m
- C. aggregate pile should be left for 24 hours before aggregates are used
- D. conical heaps of aggregates should be avoided to prevent moisture variation
- E. all the above. Discuss
- 5. Vicat's apparatus is used for
Options- A. fineness test
- B. consistency test
- C. setting time test
- D. soundness test
- E. compressive strength test. Discuss
- 6. Pick up the correct statement from the following:
Options- A. Insufficient quantity of water makes the concrete mix harsh
- B. Insufficient quantity of water makes the concrete unworkable
- C. Excess quantity of water makes the concrete segregated
- D. Excess quantity of water causes bleeding in concrete
- E. All the above. Discuss
- 7. For the construction of cement concrete floor, the maximum permissible size of aggregate, is
Options- A. 4 mm
- B. 6 mm
- C. 8 mm
- D. 10 mm
- E. 12 mm Discuss
- 8. For road pavements, the cement generally used, is
Options- A. ordinary Portland cement
- B. rapid hardening cement
- C. low heat cement
- D. blast furnace slag cement
- E. none of these. Discuss
- 9. Pick up the correct proportions of chemical ingredients of cement
Options- A. Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
- B. Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3
- C. Alumina : Silica : Lime : Iron oxide : 63 : 22 : 6 : 3
- D. Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3 Discuss
- 10. If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is
Options- A.
- B.
- C.
- D.
- E.
Discuss
Concrete Technology problems
Search Results
Correct Answer: all the above.
Correct Answer: all the above.
Correct Answer: 5.0 cm
Correct Answer: all the above.
Correct Answer: consistency test
Correct Answer: All the above.
Correct Answer: 10 mm
Correct Answer: rapid hardening cement
Correct Answer: Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
Correct Answer:
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