RRB JE Stage II : Civil Engineering Quiz | 17th August

Dear aspirants,

RRB JE Stage II exam is scheduled to be conducted from 28th August to 1st September 2019. The overall merit for the selection will be made on the basis of the marks scored in stage II, so candidates need to prepare thoroughly for the second stage. To help the aspirants, Adda247 has come up with a study plan in which we will provide you daily quizzes of all technical subjects. The below quiz will be helpful for the candidates who opted Civil as the exam group in RRB JE stage II. 

Q1. The collapsible soil is associated with
(a) dune sands
(b) laterite soils
(c) loess
(d) black cotton soils

S1. Ans.(c)
Sol.

Q2. Bentonite is a material obtained due to the weathering of
(a) limestone
(b) quartzite
(c) volcanic ash
(d) shales

S2.Ans.(c)
Sol. Bentonite is decomposed volcanic ash containing high percentage of clay mineral-montmorillonite.

Q3. The laboratory tests on a sample yielded the following results:
Plasticity index : 32%
Liquidity index : 0.15
Activity number : 1.58
Which of the following inferences can be drawn?
1. The soil is very stiff.
2. The soil is medium soft.
3. The soil is highly plastic.
4. The soil is medium plastic.
5. The soil is active.
Select the correct answer using the codes given below:
(a) 1, 3 and 5
(b) 1, 3 and 4
(c) 2, 3 and 5
(d) 1, 2 and 4

Q4. A soil has bulk density of 22 kN/m³ and water content 10%. The dry density is
(a) 20 kN/m³
(b) 15 kN/m³
(c) 18 kN/m³
(d) 19 kN/m³

Q5. The porosity of a soil sample is 30% and specific gravity of its particles is 2.75. Then saturated unit weight is equal to
(a) 1.69 gm/cm³
(b) 1.94 gm/cm³
(c) 2.23 gm/cm³
(d) 2.46 gm/cm³

Q6. A soil has plastic limit of 20% and plasticity index of 40%. If the natural water content of the soil is 34%, then the consistency index is equal to
(a) 0.35
(b) 0.65
(c) 0.82
(d) 1.00

 

S7. Ans.(a)
Sol.


(a) Liquidity index
(b) Shrinkage ratio
(c) Consistency index
(d) Toughness index

S8. Ans.(c)
Sol. The consistency index indicates the consistency (firmness) of a soil. It shows the nearness of the water contents of the soil to its plastic limit. A soil with a consistency index of zero is at the liquid limit. It is extremely soft and has negligible shear strength. On the other hand, a soil at a water content equal to the plastic limit has a consistency index of 100%, indicating that the soil is relatively firm.


(a) Stoke’s law
(b) Darcy’s law
(c) Archimede’s principle
(d) Poiseuille’s law

S9. Ans.(c)
Sol. When the soil exists below water, it is in a submerged condition. When a volume V of soil is submerged in water, then according to Archimede’s principle it displaces an equal volume of water. Thus the net mass of soil when submerged is reduced.

Q10. Which one of the following gives the correct ecreasing order of the densities of a soil sampile?
(a) Saturated, submerged, wet, dry
(b) Saturated, wet, submerged, dry
(c) Saturated, wet, dry, submerged
(d) Wet, saturated, submerged, dry

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