Concrete Technology Sheet 1
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1) Question.
The strength of concrete after one year as compared to 28 days strength is about
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2) Question.
The percentage of voids in cement is approximately
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3) Question.
The most commonly used admixture which prolongs the setting and hardening time is
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4) Question.
Admixtures which cause early setting, and hardening of concrete are called
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5) Question.
As compared to ordinary portland cement, use of pozzuolanic cement
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6) Question.
Increase in the moisture content in concrete
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7) Question.
According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm^2) can be taken as
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8) Question.
The compressive strength of 100 mm cube as compared to 150 mm cube is always
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9) Question.
The relation between modulus of rupture fcr and characteristic strength of concrete fck is given by
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10) Question.
Strength of concrete increases with
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11) Question.
The approximate value of the ratio between direct tensile strength and flexural strength is
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12) Question.
The relation between modulus of rupture fcr, splitting strength fcs and direct term strength fct is given by
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13) Question.
Air entertainment in the concrete increases
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14) Question.
Approximate value of shrinkage strain concrete, is
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15) Question.
Workability of concrete is inversely proportional to
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16) Question.
Workability of concrete is directly proportional to
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17) Question.
The property of the ingredients to separate from each other while placing the concrete is called
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18) Question.
Select the incorrect statement
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19) Question.
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
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20) Question.
To determine the modulus of rupture, the size of test specimen used is
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