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Civil Engineering - Concrete Technology

Exercise : Concrete Technology - Section 4
41.
According to IS : 382-1963, a good aggregate should be
chemically inert
sufficiently strong
hard and durable
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be
between 150 to 300 kg/cm2
between 350 to 600 kg/cm2
between 150 to 500 kg/cm2
below 200 kg/cm2
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation
0.1P + 0.3Y + 0.1Z = W/C x P
0.3P + 0.1Y + 0.01Z = W/C x P
0.4P + 0.2Y + 0.01Z = W/C x P
0.5P + 0.3Y + 0.01Z = W/C x P
0.2P + 0.5Y + 0.1Z = W/C x P
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
For the construction of thin R.C.C. structures, the type of cement to be avoided, is
ordinary Portland cement
rapid hardening cement
low heat cement
blast furnace slag cement
sulphate resisting cement.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Vicat apparatus is used for
fineness test
consistency test
test for setting time
test for tensile strength
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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