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Concrete Technology
Comments
Question
For preparing a test-specimen, it is necessary
Options
A. to mix cement and fine aggregate by dry hand
B. to mix coarse aggregates
C. to mix water to the cement, fine aggregates and coarse aggregates
D. to oil inner surface of the mould and the base plate, before placing concrete
E. all the above.
Correct Answer
all the above.
Concrete Technology problems
Search Results
1. Pick up the incorrect statement from the following:
Options
A. In properly graded aggregates, bulk density is more
B. In single size aggregates, bulk density is least
C. In single size aggregates, bulk density is maximum
D. None of these.
Show Answer
Scratch Pad
Discuss
Correct Answer: In single size aggregates, bulk density is maximum
2. 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
3. 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
4. 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.
5. 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
6. High temperature
Options
A. increases the strength of concrete
B. decreases the strength of concrete
C. has no effect on the strength of concrete
D. none of these.
Show Answer
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Discuss
Correct Answer: decreases the strength of concrete
7. The type of aggregates of same nominal size, which contain less voids when compacted, are
Options
A. rounded spherical
B. irregular
C. flaky
D. none of these.
Show Answer
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Discuss
Correct Answer: rounded spherical
8. The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is
Options
A. 100 kg/cm
2
B. 150 kg/cm
2
C. 200 kg/cm
2
D. 250 kg/cm
2
E. 300 kg/cm
2
Show Answer
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Discuss
Correct Answer: 150 kg/cm
2
9. Slump test of concrete is a meausre ofits
Options
A. consistency
B. compressive strength
C. tensile strength
D. impact value.
Show Answer
Scratch Pad
Discuss
Correct Answer: consistency
10. The bulk density of aggregates, is generally expressed as
Options
A. tonnes/cubic metre
B. kg/cubic metre
C. kg/litre
D. g/cm
3
E. none of these.
Show Answer
Scratch Pad
Discuss
Correct Answer: kg/litre
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