Unconfmed compressive strength test is________________?

Related Mcqs:

1. A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively______________________?

   A. 0.5 N/mm2 and 30°
   B. 0.05 N/mm2 and 0°
   C. 0.2 N/mm2 and 0°
   D. 0.05 N/mm2 and 45°

2. If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is__________________?

   A. 90°
   B. 45°
   C. 22.5°
   D. 0°

3. In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as__________________?

   A. consolidated drained test
   B. consolidated undrained test
   C. unconsolidated drained test
   D. unconsolidated undrained test

4. For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?

   A. dry of OMC and wet of OMC
   B. wet of OMC and dry of OMC
   C. wet of OMC and wet of OMC
   D. dry of OMC and dry of OMC where OMC is optimum moisture content

5. The shear strength of a soil_________________?

   A. is directly proportional to the angle of internal friction of the soil
   B. is inversely proportional to the angle of internal friction of the soil
   C. decreases with increase in normal stress
   D. decreases with decrease in normal stress

6. Shear strength of a soil is a unique function of__________________?

   A. effective stress only
   B. total stress only
   C. both effective stress and total stress
   D. none of the above

7. 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

8. The most suitable method for drainage of fine grained cohesive soils is________________?

   A. well ppint system
   B. vacuum method
   C. deep well system
   D. electroosmosis method

9. Skempton’s pore pressure coefficient B for saturated soil is________________?

   A. 1
   B. zero
   C. between 0 and 1
   D. greater than 1

10. The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?

    A. vertical if the soil is in an active state of plastic equilibrium
    B. vertical if the soil is in a passive state of plastic equilibrium
    C. inclined at 45° to the vertical plane
    D. none of the above