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- Question
The aggregate containing moisture in pores and having its suface dry, is known as
Options- A. moist aggregates
- B. very dry aggregates
- C. dry aggregates
- D. saturated surface dry aggregate
- E. none of these.
- Correct Answer
- saturated surface dry aggregate
- 1. Pick up the correct statement from the following:
Options- A. Water enables chemical reaction to take place with cement
- B. Water lubricates the mixture of gravel, sand and cement
- C. Only a small quantity of water is required for hydration of cement
- D. Strength of concrete structure largely depends upon its workability
- E. All the above. Discuss
- 2. The operation of removing humps and hollows of uniform concrete surface, is known as
Options- A. floating
- B. screeding
- C. trowelling
- D. finishing
- E. none of these. Discuss
- 3. Saw dust can be rendered chemically inert by boiling it in water containing
Options- A. ferrous sulphate
- B. potassium chloride
- C. ammonia
- D. nitric acid
- E. sulphuric acid. Discuss
- 4. The cement whose strength is a little lower than the ordinary cement during the first three months but attains afterwards the same strength, is known as
Options- A. low-heat Portland cement
- B. rapid hardening Portland cement
- C. Portland blast slag cement
- D. Portland pozzolana cement
- E. none of these. Discuss
- 5. For concreting tunnel linings, tran-portation of concrete is done by
Options- A. pans
- B. wheel borrows
- C. containers
- D. pumps
- E. belt conveyors. Discuss
- 6. The commercial name of white and coloured cement in India, is
Options- A. colocrete
- B. rainbow cement
- C. silvicrete
- D. snowcem
- E. all the above. Discuss
- 7. If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed
Options- A. 10 cm
- B. 15 cm
- C. 20 cm
- D. 25 cm
- E. 30 cm Discuss
- 8. Pick up the correct statement from the following:
Options- A. High percentage of C3S and low percentage of C2S cause rapid hardening
- B. High percentage of C3S and low percentage of C2S make the cement less resistive to chemical attack
- C. Low percentage of C3S and high percentage of C2S contribute to slow hardening
- D. Low percentage of C3S and high percentage of C2S provide greater resistance to chemical attack
- E. All the above. Discuss
- 9. Pick up the correct statement from the following:
Options- A. Calcium chloride acts as a retarder
- B. Gypsum (calcium sulphate) acts as an accelerator
- C. Gypsum (calcium sulphate) acts as a retarder
- D. Calcium chloride acts as an accelerator
- E. Both (c) and (d). Discuss
- 10. For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is
Options- A. 1 : 3 : 6
- B. 1 :
: 3 - C. 1 : 2 : 4
- D. 1 : 1 : 2
- E. 1 : 4 : 8. Discuss
Concrete Technology problems
Search Results
Correct Answer: All the above.
Correct Answer: screeding
Correct Answer: ferrous sulphate
Correct Answer: low-heat Portland cement
Correct Answer: pumps
Correct Answer: all the above.
Correct Answer: 20 cm
Correct Answer: All the above.
Correct Answer: Both (c) and (d).
Correct Answer: 1 : 2 : 4
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