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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 3
21.
Pick up the correct statement from the following:
Calcium chloride acts as a retarder
Gypsum (calcium sulphate) acts as an accelerator
Gypsum (calcium sulphate) acts as a retarder
Calcium chloride acts as an accelerator
Both (c) and (d).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Joints in concrete structures, are provided
to reduce the tensile stresses likely to be developed due to evaporation of water
to minimise the change in the dimensions of the slab
to minimise the necessary cracking
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is
15, 900 litres
16, 900 litres
17, 900 litres
18, 900 litres
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The condition not applicable to water cement ratio law, is
internal moisture conditions on hydration continue till complete strength is gained
concrete specimens may be tested at any temperature
concrete specimens need be of same age
concrete specimens need be of same size
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
High temperature
increases the strength of concrete
decreases the strength of concrete
has no effect on the strength of concrete
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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