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BARC OCES 2022 Quiz 3
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Question 1
Statement 1) The aim is to use the lowest allowable water cement ratio in concrete.
Statement 2) The increase in the water cement ratio causes the increase in the workability of concrete.
Statement 2) The increase in the water cement ratio causes the increase in the workability of concrete.
Question 2
The target means strength fcm for concrete mix design obtained from the characteristic strength fck and standard deviation σ, as defined in IS:456-2000, is
Question 3
Grading of aggregates for concrete is mainly done to?
Question 4
Which following is not the method of volumetric proportioning of concrete?
Question 5
The minimum grade of concrete for R.C.Cunder moderate exposure with 20 mm nominal size of aggregate is
Question 6
The liquid limit (LL), plastic limit (PL) and shrinkage limit (SL) of a cohesive soil satisfy the relation
Question 7
Which of the following statement(s) is (are) correct?
1) Activity is a measure of the water holding capacity of clayey soils.
2) As the plasticity index decreases as the amount of clay fraction increases.
3) Highly active minerals can produce a large increase in the plasticity index when present in small quantity.
4) A high value of toughness index indicates a low percentage of colloidal active clay minerals.
1) Activity is a measure of the water holding capacity of clayey soils.
2) As the plasticity index decreases as the amount of clay fraction increases.
3) Highly active minerals can produce a large increase in the plasticity index when present in small quantity.
4) A high value of toughness index indicates a low percentage of colloidal active clay minerals.
Question 8
Consider the following list 1 and list 2
List 1
1) Thixotropy
2) Sensitivity
3) Flow index
4) Toughness index
List 2
a) Is a measure of the soil shearing strength of the soil at plastic limit.
b) Is the rate at which a soil mass losses shear strength with an increase in water content.
c) Gain in strength or the soil with with passage of time after it has been remoulded.
d) Weakening of soil due to remoulding.
List 1
1) Thixotropy
2) Sensitivity
3) Flow index
4) Toughness index
List 2
a) Is a measure of the soil shearing strength of the soil at plastic limit.
b) Is the rate at which a soil mass losses shear strength with an increase in water content.
c) Gain in strength or the soil with with passage of time after it has been remoulded.
d) Weakening of soil due to remoulding.
Question 9
The relationship between water content (w%) and number of blows (N) in soils, as obtained from Casagrande's liquid limit device, is given by
w = 20 – log10 N
The liquid limit of the soil is
w = 20 – log10 N
The liquid limit of the soil is
Question 10
The laboratory tests on a soil sample gave the following results:
1). Natural water content, wn = 25%
2). Liquid limit, wL = 60%
3). Plastic limit, wp = 35%
4). Percentage of particle less than 2μ = 20%
The value of activity number is
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ESE & GATE CEGeneralMar 4ESE & GATE CE
