Civil Engineering Archives

2311. In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear________________?

A. decreases

B. increases

C. remains unchanged

D. first increases and then decreases

✅ The correct answer is option A.

2312. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as_____________?

A. negative

B. zero

C. non-plastic (NP)

D. 1

✅ The correct answer is option B.

2313. The flownet for an earthen dam with 30 m water depth consists of 25 potential drops and 5 flow channels. The coefficient of permeability of dam material is 0.03 mm/sec. The discharge per meter length of dam is________________?

A. 0.00018 nrVsec

B. 0.0045 m3/sec

C. 0.18m3/sec

D. 0.1125m3/sec

✅ The correct answer is option A.

2314. Coefficient of compressibility is_______________?

A. constant for any type of soil

B. different for different types of soils and also different for a soil under different states of consolidation

C. different for different types of soils but same for a soil under different states of consolidation

D. independent of type of soil but depends on the stress history of soil

✅ The correct answer is option B.

2315. Which one of the following clays behaves like a dense sand ?

A. over-consolidated ciay with a high over-consolidation ratio

B. over-consolidated clay with a low over-consolidation ratio

C. normally consolidated clay

D. under-consolidated clay

✅ The correct answer is option A.

2316. During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 “N/mm2. Skempton’s pore pressure parameter B is___________________?

A. 0.5

B. -0.5

C. 2.0

D. – 2.0

✅ The correct answer is option A.

2317. Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability__________________?

A. increases by 25%

B. increases by 50%

C. increases by 33.3%

D. decreases by 33.3%

✅ The correct answer is option B.

2318. If the plasticity index of a soil mass is zero, the soil is______________?

A. sand

B. silt

C. clay

D. clayey silt

✅ The correct answer is option A.

2319. The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30° is___________________?

A. 1/3

B. 3

C. 1

D. 1/2

✅ The correct answer is option A.

2320. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?

A. less than specific gravity of soil

B. equal to specific gravity of soil

C. greater than specific gravity of soil

D. independent of specific gravity of soil

✅ The correct answer is option B.