Explore topic-wise MCQs in Soil Mechanics.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Soil Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.

The relationship between the quantity of flow with respect to the hydraulic radius and the voids ratio is given by ________

A. (q= frac{ _w R_H^2}{ } frac{e}{1+e}iA )
B. (=C_S frac{ _w R_H^2}{ } frac{e}{1+e} )
C. (=C_S frac{ _w R_H^2}{ }iA )
D. (=C_S frac{ _w R_H^2}{ } frac{e}{1+e}iA )
Answer» E.
Discussion
2.

The quantity of flow for circular tube with respect to the hydraulic radius is given by ________

A. (q= frac{1}{2} frac{ _w R_H^2}{ } )
B. (q= frac{1}{2} frac{ _w R_H^2}{ }ia )
C. (q= frac{1}{2} frac{ _w R_H^2}{ }i )
D. (q= frac{1}{2} frac{ _w R_H^2}{ }a )
Answer» C. (q= frac{1}{2} frac{ _w R_H^2}{ }i )
Discussion
3.

The hydraulic radius RH is related with the voids ratio as ________

A. R<sub>H</sub>=V<sub>s</sub>/eA<sub>s</sub>
B. R<sub>H</sub>=eV<sub>s</sub>A<sub>s</sub>
C. R<sub>H</sub>=e/A<sub>s</sub>V<sub>s</sub>
D. R<sub>H</sub>=eV<sub>s</sub>/A<sub>s</sub>
Answer» E.
Discussion
4.

The hydraulic radius RH of circular tube is given by ________

A. R<sub>H</sub>=R/4
B. R<sub>H</sub>=R/6
C. R<sub>H</sub>=R/2
D. R<sub>H</sub>=R/12
Answer» D. R<sub>H</sub>=R/12
Discussion
5.

The hydraulic radius RH is the ratio of the area of the tube to its volume.

A. True
B. False
Answer» B. False
Discussion
6.

The average velocity of the tube of area a is given by _________

A. (v_{av}= frac{i _w}{8 }a )
B. (v_{av}= frac{ frac{i _w}{8 }}{a} )
C. (v_{av}= frac{i _w}{2 }a )
D. (v_{av}= frac{ frac{i _w}{4 }}{a} )
Answer» B. (v_{av}= frac{ frac{i _w}{8 }}{a} )
Discussion
7.

The total quantity of water with respect to the hydraulic gradient flowing through the capillary tube is given by _________

A. ( q= frac{hi _w}{4 L} R^2 )
B. ( q= frac{h _w}{4 L} R^4/i )
C. ( q= frac{i _w}{8 } R^2 )
D. ( q= frac{i _w}{8 } R^4 )
Answer» E.
Discussion
8.

The total quantity of water flowing through the capillary tube is given by _________

A. (q= frac{h _w}{4 L} R^2 )
B. (q= frac{h _w}{4 L} R^4 )
C. (q= frac{h _w}{8 L} R^2 )
D. (q= frac{h _w}{8 L} R^4 )
Answer» E.
Discussion
9.

The quantity of water flowing in thin cylindrical sheet of thickness dr is ____________

A. (dq= frac{h _w}{4 L}(R^2-r^2)2 rdr )
B. (dq= frac{h _w}{4 L}(R^2-r^2)4 rdr )
C. (dq= frac{h _w}{4 L}(R^2-r^2)8 rdr )
D. (dq= frac{h _w}{4 L}(R^2-r^2)12 rdr )
Answer» B. (dq= frac{h _w}{4 L}(R^2-r^2)4 rdr )
Discussion
10.

The velocity of flow of water at the centre of tube is _______ when the head is 0.1m, =8.9*10-3 dynes-s/cm2, w=1 g/cm3, the length is 10m and the diameter is 20cm.

A. 20 cm/s
B. 22 cm/s
C. 28 cm/s
D. 30 cm/s
Answer» D. 30 cm/s
Discussion
11.

In Poiseuille s law of flow, the variation of the velocity is given by _______

A. v = ( frac{h _w}{4 L}(r^2-R^2) )
B. v = ( frac{h _w}{14 L}(R^2-r^2) )
C. v = ( frac{h _w}{4 L}(R^2-r^2) )
D. v = ( frac{h _w}{8 L}(R^2-r^2) )
Answer» D. v = ( frac{h _w}{8 L}(R^2-r^2) )
Discussion
12.

For flow of water in tube, the velocity at surface is ___________

A. zero
B. equal to velocity at 1/3 of diameter
C. equal to velocity at 1/2 of diameter
D. equal to velocity at centre
Answer» B. equal to velocity at 1/3 of diameter
Discussion