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Concrete Technology
Comments
Question
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).
Correct Answer
Both (c) and (d).
Concrete Technology problems
Search Results
1. Pick up the correct statement from the following:
Options
A. High percentage of C
3
S and low percentage of C
2
S cause rapid hardening
B. High percentage of C
3
S and low percentage of C
2
S make the cement less resistive to chemical attack
C. Low percentage of C
3
S and high percentage of C
2
S contribute to slow hardening
D. Low percentage of C
3
S and high percentage of C
2
S provide greater resistance to chemical attack
E. All the above.
Show Answer
Scratch Pad
Discuss
Correct Answer: All the above.
2. 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
Show Answer
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Discuss
Correct Answer: 20 cm
3. 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.
Show Answer
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Discuss
Correct Answer: all the above.
4. 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.
Show Answer
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Discuss
Correct Answer: saturated surface dry aggregate
5. 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.
Show Answer
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Discuss
Correct Answer: All the above.
6. 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.
Show Answer
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Discuss
Correct Answer: 1 : 2 : 4
7. Slump test of concrete is a measure ofits
Options
A. consistency
B. compressive strength
C. tensile strength
D. impact value.
Show Answer
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Discuss
Correct Answer: consistency
8. The void ratio of
Options
A. single size coarse aggregate is roughly 0.45.
B. graded coarse aggregate is roughly 0.040
C. fine aggregate is roughly 0.45
D. all the above.
Show Answer
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Discuss
Correct Answer: all the above.
9. The condition not applicable to water cement ratio law, is
Options
A. internal moisture conditions on hydration continue till complete strength is gained
B. concrete specimens may be tested at any temperature
C. concrete specimens need be of same age
D. concrete specimens need be of same size
E. none of these.
Show Answer
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Discuss
Correct Answer: concrete specimens may be tested at any temperature
10. The type of aggregates not suitable for high strength concrete and for pavements subjected to tension, is
Options
A. rounded aggregate
B. irregular aggregate
C. angular aggregate
D. flaky aggregate
E. none of these.
Show Answer
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Discuss
Correct Answer: rounded aggregate
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