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MCQ
21661. The liquidity index (in percentage) is given by-
(ω_p-ω)*100/I_p
(ω_L-ω)*100/I_p
(ω_L-ω_p )*100/I_p
(ω-ω_p )*100/I_p
ব্যাখ্যা: Here, ω = Natural water content ω_p = Plastic limit I_p= Plasticity index
21662. Which of the following is highly permeable?
Gravel
Sand mixture
Coarse sand
Clay
21663. The sensitivity of a normal clay is about-
2 to 4
8 to 15
4 to 8
15 to 20
21664. The unconfined compressive strength of a hard clay is-
10 to 25kN/m²
150 to 400kN/m²
25 to 150kN/m²
above 400kN/m²
21665. The relation between dry unit weight (γ_d), S.G. (G), void ratio (e) or porosity N is-
γ_d=(Gγ_ω)/(1+e)
γ_d=(Gγ_ω)/(1-e)
γ_d=Gγ_ω (1-n)
γ_d=Gγ_ω (1+n)
21666. Which of the following have an influence on the value of permeability?
Grain size
Void ratio
Degree of saturation
all of these
21667. 1.5m × 1.0m × 2.0m আয়তনের একটি বস্তুর পানিতে ওজন 3000kg; এর Specific gravity কত? [MOCA-19]
0.8
0.9
1.0
1.1
ব্যাখ্যা: Specific gravity =তরলের ওজন/ সমআয়তনের পানির ওজন = 3000/(3 * 1000) = 1
21668. The unconfined compressive strength of a very soft clay is-
10 to 25kN/m²
150 to 400kN/m²
25 to 150kN/m²
above 400kN/m²
21669. Triaxial apparatus কোন test-এর জন্য ব্যবহৃত হয়? [MOCA-19]
Unconsolidated undrain
Consolidated undrain
Drained
সবগুলো
21670. The plasticity index is the ratio of liquidity index and flow index.
Right
Wrong
21671. Shrinkage index কী? [MOCA-19]
Liquid limit - Shrinkage limit
Liquid limit + Plastic limit
Plastic limit - Liquid limit
Shrinkage limit - Liquid limit
ব্যাখ্যা: মৃত্তিকার তারল্য সীমা এবং সংকোচন সীমার পার্থক্যকে সংকোচন সূচক বলে। অর্থাৎ, SI = LL - SI Shrinkage index = Liquid limit - Shrinkage limit.
21672. The liquid limit exists in-
sandy soils
gravel soils
silty soils
clays
21673. একটি মাটির Porosity ০.৪৫ হলে Void ratio কত? [LGED-19]
০.৩১
১.২২
০.৪১
০.৮২
ব্যাখ্যা: e = n/(1 - n) = (0.45)/(1- 0.45) =0.82
21674. একটি Soil নমুনার Voids volume = Solids Volume হলে Porosity কত? [MOLE - 19 ]
0.5
1.0
2.0
ব্যাখ্যা: Viod ratio, e = V_(v )/V_(s ) =1 again , n=e/1+e = 1/1+1 = 0.5
21675. The liquid limit minus plastic limit is termed as-
flow index
plasticity index
shrinkage index
liquidity index
21676. The unit weight of a completely saturated soil (γ_sat) is given by-
((G+e)γ_ω)/(1+e)
((1+e)γ_ω)/(G+e)
((G-1)γ_ω)/(1+e)
((1-e)γ_ω)/(G+e)
21677. বিদ্যমান Over-burden pressure-এ মাটি যদি Fully consolidated না হয়, তখন তাকে কী বলে? [MOCA-19]
Pre-consolidated
Normally consolidated
Over consolidated
কোনোটিই নয়
21678. The plastic limit exists in-
sandy soils
gravel soils
silty soils
clays
21679. When the consistency index is zero, then the soil is at its-
elastic limit
plastic limit
liquid limit
semi-solid state
21680. The water content in a soil at which just shear strength develops is called-
liquid limit
elastic limit
plastic limit
shrinkage limit