Concrete Technology problems
- 1. Curing
Options- A. reduces the shrinkage of concrete
- B. preserves the properties of concrete
- C. prevents the loss of water by evaporation
- D. all of the above. Discuss
Correct Answer: all of the above.
- 2. Curing a concrete for long period ensures better
Options- A. volume stability
- B. strength
- C. water resistance
- D. water tightness and durability
- E. all the above. Discuss
Correct Answer: all the above.
- 3. The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning
Options- A. 1 : 1 : 2
- B. 1 : 2 : 4
- C. 1 : 3 : 6
- D. 1 : 2 : 8
- E. 1 : 4 : 10 Discuss
Correct Answer: 1 : 4 : 10
- 4. If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,
Options- A. 20%
- B. 25%
- C. 30%
- D. 35%
- E. 40% Discuss
Correct Answer: 25%
- 5. The increased cohesiveness of concrete, makes it
Options- A. less liable to segregation
- B. more liable to segregation
- C. more liable to bleeding
- D. more liable for surface scaling in frosty weather
- E. none of these. Discuss
Correct Answer: less liable to segregation
- 6. To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temperature between
Options- A. 1100° and 1200°C
- B. 1200° and 1300°C
- C. 1300° and 1400°C
- D. 1400° and 1500°C
- E. 1500° and 1600°C Discuss
Correct Answer: 1400° and 1500°C
- 7. M10 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 : 3 : 6 mix
- 8. The rock which is not calcareous, is :
Options- A. lime stone
- B. macl
- C. chalk
- D. laterite
- E. none of these. Discuss
Correct Answer: laterite
- 9. Under normal conditions using an ordinary cement, the period of removal of the form work, is :
Options- A. 7 days for beam soffits
- B. 14 days for bottom slabs of spans 4.6 m and more
- C. 21 days for bottom beams over 6 m spans
- D. 2 days for vertical sides of columns
- E. all the above. Discuss
Correct Answer: all the above.
- 10. The standard sand now a days used in India, is obtained from
Options- A. Jaipur (Rajasthan)
- B. Jullundur (Punjab)
- C. Hyderabad (Andhra Pradesh)
- D. Ennore (Madras)
- E. Cuttuck (Orissa). Discuss
Correct Answer: Ennore (Madras)
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