০০। 260 g of wet soil was taken in a pycnometer jar of weight 400 g in order to find the moisture content in the soil, with specific gravity of soil particles 2.75. The weight of soil and remaining water filled in pycnometer without air bubbles was 1415 g and the weight of pycnometer filled with water alone was 1275 g. The moisture content in the soil is
ক) 24.2%
খ) 18.2%
গ) 53.8%
ঘ) none of these.
০১। A clay subjected to pressure in excess to its present over-burden, is said to be
ক) pre-compressed
খ) pre-consolidated
গ) over-consolidated
ঘ) all the above.
০২। A coarse-grained soil has a voids ratio 0.75, and specific gravity as 2.75. The critical gradient at which quick sand condition occurs, is
ক) 0.25
খ) 0.50
গ) 0.75
ঘ) 1.00
০৩। A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm3. If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is
ক) 11.1%
খ) 55.6%
গ) 69.6%
ঘ) none of these.
০৪। A critical hydraulic gradient may occur when
ক) flow is in upward direction
খ) seepage pressure is in upward direction
গ) effective pressure is zero
ঘ) all the above.
০৫। A decrease in water content results in a reduction of the volume of a soil in
ক) liquid state
খ) plastic state
গ) semi solid state
ঘ) all of these.
০৬। A direct shear test possesses the following disadvantage:
ক) A relatively thin thickness of sample permits quick drainage
খ) A relatively thin thickness of sample permits quick dissipation of pore pressure developed during the test
গ) As the test progresses the area under shear, gradually changes
ঘ) none of these.
০৭। A failure wedge develops if a retaining wall
ক) moves away from the backfill
খ) moves towards the backfill
গ) sinks downwards
ঘ) stresses equally by vertical and horizontal forces.
০৮। A flow line makes angles θ1 and θ2 with the normal to the interface of the soils having permeabilities k1, k2 before and after deflection. According to the law of deflection of the flow lines at the interface of the dissimilar soils
ক)
খ)
গ)
ঘ)
০৯। A flow net may be utilised for the determination of
ক) exit gradient
খ) seepage
গ) hydrostatic pressure
ঘ) seepage pressure
ঙ) all the above.
১০। A fundamental equation of void ratio(e), specific gravity (G), water content (ω) and degree of saturation (Sr) is
ক) e =
খ) ω =
গ) G =
ঘ) Sr =
১১। A grillage foundation
ক) is provided for heavily loaded isolated columns
খ) is treated as spread foundation
গ) consists of two sets of perpendicularly placed steel beams
ঘ) all the above.
১২। A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is
ক) 54%
খ) 64%
গ) 74%
ঘ) 84%
১৩। A moist soil sample weighing 108 g has a volume of 60 cc. If water content is 25% and value of G = 2.52, the void ratio is
ক) 0.55
খ) 0.65
গ) 0.75
ঘ) 0.80
১৪। A partially saturated sample of soil has a unit weight of 2.0 g/cm3 and specific gravity of soil particles is 2.6. If the moisture content in the soil is 20%, the degree of saturation is
ক) 20%
খ) 77%
গ) 92%
ঘ) none of these.
১৫। A partially saturated soil is classified as
ক) one phase soil
খ) two phase soil
গ) three phase soil
ঘ) four phase soil.
১৬। A phreatic line is defined as the line within a dam section below which there are
ক) positive equipotential lines
খ) positive hydrostatic pressure
গ) negative hydrostatic pressure
ঘ) negative equipotential lines
ঙ) none of these.
১৭। A pile is being driven with a drop hammer weighing 1800 kg and having a free fall of 1.00 m. If the penetration with last blow is 5 mm, the load carrying capacity of the pile, -according to the Engineering News formula, is
ক) 100 tonnes
খ) 50 tonnes
গ) 20 tonnes
ঘ) 10 tonnes.
১৮। A plane inclined at an angle φ to the horizontal at which the soil is expected to stay in the absence of any lateral support, is known as