Civil Engineering - Concrete Technology

16. 

Ordinary Portland cement is manufactured from

A. lime stone and clay
B. gypsum and lime
C. pozzolana
D. lime, pozzolana and clay.

Answer: Option B

Explanation:

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17. 

A flaky aggregate is said to be elongated if its length is

A. equal to the mean size
B. twice the mean size
C. thrice the mean size
D. four times the mean size
E. five times the mean size.

Answer: Option B

Explanation:

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18. 

To prevent segregation, the maximum height for placing concrete, is

A. 100 cm
B. 125 cm
C. 150 cm
D. 200 cm
E. 250 cm

Answer: Option A

Explanation:

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19. 

If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is

A. M 100
B. M 150
C. M 200
D. M 250
E. M 300

Answer: Option A

Explanation:

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20. 

Water cement ratio is generally expressed in volume of water required per

A. 10 kg
B. 20 kg
C. 30 kg
D. 40 kg
E. 50 kg

Answer: Option E

Explanation:

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