Geotechnical Engineering

Particle Size Distribution Curve

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The curve situated at the right side of the particle size distribution curve is _________
Coarse-grained soil
Fine-grained soil
coarse-grained soil
None of the mentioned
Explanation:
The right side the particle size distribution curve shows the coarse-grained while the left shows the relatively fine-grained soil.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
For coarse grained soil, the particle size D10 is sometimes called as __________
Effective size and effective diameter
Uniform diameter
All of the mentioned
None of the mentioned
Explanation:
The size D10 is sometimes called as the effective size or effective diameter.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The shape of the particle size curve is represented by _________
Effective size
Effective diameter
Uniform coefficient
Co-efficient of curvature
Explanation:
Coefficient of the curvature Cc represent the shape of the particle size curve given by CC = (D40)2/D10×D30.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The time of settlement of the finest particle of soil sample is 15hr20min49sec. calculate the height of the water tank. Take D=0.01 mm, γ=0.905D2.
5 m
7 m
12 m
4 m
Explanation:
γ=0.905(0.01)
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The D10 represents a size, such that _________ of the particles are finer than this size.
20%
60%
10%
100%
Explanation:
The D10 represents a size, in mm such that 10% of the particle is finer than D10 size.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The shape of particle size curve, which is represented by the coefficient of curvature (Cc) is given by __________
Cc = (D30)2/D10×D40
Cc = (D40)2/D10×D30
Cc = (D30)2/D10×D60
Cc = D60/D10
Explanation:
The coefficient of curvature (Cc) is given by the equation
Question 7
Marks : +2 | -2
Pass Ratio : 100%
A curve with a flat portion, in particle size distribution curve represent __________
Intermediate size particle are missing
Intermediate size particles are present
Smaller size particle are present
Large size particles are present
Explanation:
A curve with a flat portion represents oil in which intermediate size particle are missing.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
A soil sample may be well graded if __________
If it has most number of particles of same size
Excess of certain particles
Good representation of particles of all size
None of the mentioned
Explanation:
A soil is said to be well graded when it has a good representation of particle of all size.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The coefficient of uniformity (CV) is the ratio of _________
D60 and D10
D30 and D10
D10 and D30
D10 and D30
Explanation:
The coefficient of uniformity CV, is defined as the ratio of D60 and D10
Question 10
Marks : +2 | -2
Pass Ratio : 100%
What is the time of settlement of coarse particle of a soil sample, of diameter 0.5?
11.6 seconds
72.8 seconds
14 seconds
22.1 seconds
Explanation:
γ=0.905(0.5)2=0.2263 m/sec