List of top Water Engineering and Management Questions on Soil Mechanics

A sample of saturated soil has a water content of 29.6%. If the specific gravity of solids is 2.7, the dry unit weight (in gram/cm\(^3\)) of the soil is equal to:

The most expansive clay mineral is:

The levels of soil density are given below: (A) Saturated density
(B) Submerged density
(C) Wet density
(D) Dry density
Choose the most appropriate sequence in the decreasing order of magnitude of the densities of a soil sample:

By placing a soil sample at 105° C for 24 hours in an oven, which of the following statements are correct? (A) Hygroscopic moisture is lost
(B) Capillary water is lost
(C) Free water is lost
(D) Structural water is lost
Which of the above statements are correct?

Consider the following statements related to pore pressure parameter \( A \), \( A_f \) (value of \( A \) at failure) and \( R \) (over consolidation ratio): (A) \( A_f \) is zero when \( R = 1 \)
(B) \( A_f \) is negative when \( R>4 \)
(C) \( A_f \) increases as \( R \) decreases
(D) \( A_f \) decreases as \( R \) decreases
Choose the most appropriate answer from the options given below:

If a sample of clay has a cohesion of 80 kPa and an angle of shearing resistance of 10°, the shear strength of clay at a normal stress of 100 kPa will be:

When effective stress on a normally consolidated clay is increased from 25 kN/m\(^2\) to 50 kN/m\(^2\), settlement becomes 5mm. If the stress is increased to 175 kN/m\(^2\), settlement will increase to (assuming coefficient of volume-decrease to be constant):

What will be the value of the coefficient of volume change if, in a consolidation test, the void ratio decreased from $0.70$ to $0.65$ when the load was changed from $50 \, \text{kN/m}^2$ to $100 \, \text{kN/m}^2$?

Calculate the critical hydraulic gradient for a soil deposit with a void ratio of 0.7 and having a specific gravity of 2.7.

Find the relation between $h_1$, $h_2$, and $h_3$ if, during a variable head permeability test on a soil sample, equal time intervals are noted for the head to drop from $h_1$ to $h_2$ and $h_2$ to $h_3$.

Water held by fine-grained soil particles due to electrochemical force of adhesion is known as:

The swelling and shrinking nature of black cotton soil is primarily due to the presence of:

If natural water content (w) of a soil sample is equal to its plastic limit (\(w_p\)), then the consistency index of the soil will be:

The natural dry density of a soil deposit was found to be $18.0 \, \text{kN/m}^3$. A sample of soil was brought to the laboratory, and the minimum and maximum dry density were found to be $15.0 \, \text{kN/m}^3$ and $20.0 \, \text{kN/m}^3$, respectively. The density index for the soil deposit will be:

If a soil has a plasticity index value of 10%, then the soil is classified as:

In a particle size distribution curve, the coefficient of curvature ($C_c$) for a soil having particle size $D_{10}$, $D_{30}$, $D_{60}$ corresponding to percentage finer value (N) 10%, 30%, and 60%, respectively, can be calculated as:

For a soil sample having void ratio e, porosity n, water content w, degree of saturation \(S_r\), specific gravity of soil \(G\), Unit weight of water\( γ_w\), and saturated unit weight of water\( γ_{sat}\), which of the following expressions stands true?

A soil sample in its undisturbed state was found to have a volume of 100 cm³ and a mass of 300 g. After oven drying, the mass got reduced to 200 g. What will be the value of the void ratio if the specific gravity of soil is 2.7? Assume the unit weight of water to be 1 g/cm³