MCQOPTIONS

Explore topic-wise MCQs in Geotechnical Engineering.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Geotechnical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.	When the surcharge angle reduces to zero, the coefficient of active earth pressure is given by
A.	K<sub>a</sub>=1
B.	(K_a= frac{1-sin }{1+sin } )
C.	(K_a= frac{1+sin }{1-sin } )
D.	K<sub>a</sub>=0
Answer» C. (K_a= frac{1+sin }{1-sin } )

2.	For backfill with sloping surface, the coefficient of active earth pressure is given by ______
A.	(K_a= frac{ sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
B.	(K_a= frac{cos + sqrt{cos^2 -cos^2 }}{cos - sqrt{cos^2 -cos^2 }} )
C.	(K_a= frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
D.	(K_a=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
Answer» E.

3.	The Rankine s lateral pressure ratio is given by ________
A.	(K= frac{ sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
B.	(K= frac{cos + sqrt{cos^2 -cos^2 }}{cos - sqrt{cos^2 -cos^2 }} )
C.	(K= frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
D.	(K=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )
Answer» D. (K=cos frac{cos - sqrt{cos^2 -cos^2 }}{cos + sqrt{cos^2 -cos^2 }} )

4.	The vertical and the lateral pressures have the same angle of obliquity .
A.	True
B.	False
Answer» B. False

5.	For finding out the active earth pressure for a backfill with sloping surface, the Rankine s theory makes as additional assumption of ________
A.	vertical and lateral stresses are normal to surcharge
B.	vertical and lateral stresses are tangential to surcharge
C.	vertical and lateral stresses are conjugate
D.	vertical and lateral stresses are negligible
Answer» D. vertical and lateral stresses are negligible

6.	The height of fill Ze, equivalent to uniform surcharge intensity is __________
A.	q/
B.	q-
C.	q+
D.	q*
Answer» B. q-

7.	If the backfill carries a uniform surcharge q, then the lateral pressure at the depth of wall H is ____________
A.	p<sub>a</sub>=K<sub>a</sub> z+K<sub>a</sub> q
B.	p<sub>a</sub>=K<sub>a</sub> z-K<sub>a</sub> q
C.	p<sub>a</sub>=K<sub>a</sub> z*K<sub>a</sub> q
D.	p<sub>a</sub>=K<sub>a</sub> z/K<sub>a</sub> q
Answer» B. p<sub>a</sub>=K<sub>a</sub> z-K<sub>a</sub> q

8.	For the different value of , the backfill is partly submerged to height H2 and the backfill is moist to a depth H1. Find the lateral pressure intensity at the base of wall for 1> 2.
A.	p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>-K<sub>a2</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub>
B.	p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+K<sub>a2</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub>
C.	p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub>
D.	p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+K<sub>a2</sub> H<sub>2</sub>
Answer» C. p<sub>a</sub>=K<sub>a2</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub>

9.	For the same value of , the backfill is partly submerged to height H2 and the backfill is moist to a depth H1. Find the lateral pressure intensity at the base of wall.
A.	p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>-K<sub>a</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub>
B.	p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+K<sub>a</sub> H<sub>2</sub>+ <sub>w</sub> H<sub>2</sub>
C.	p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub>
D.	p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+K<sub>a</sub> H<sub>2</sub>
Answer» C. p<sub>a</sub>=K<sub>a</sub> H<sub>1</sub>+ <sub>w</sub> H<sub>2</sub>

10.	If the angle of internal friction decreases, then Ka ___________
A.	decreases
B.	increases
C.	equal to zero
D.	does not change
Answer» C. equal to zero

11.	If free water stands on both side of a retaining wall, the lateral earth pressure is given by ____
A.	p<sub>a</sub>=K<sub>a</sub> z
B.	p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub> z
C.	p<sub>a</sub>=K<sub>a</sub> z+ <sub>w</sub> z
D.	p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub> z
Answer» B. p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub> z

12.	For a submerged backfill, the active earth pressure is given by _________
A.	p<sub>a</sub>=K<sub>a</sub> z
B.	p<sub>a</sub>=K<sub>a</sub> z- <sub>w</sub>z
C.	p<sub>a</sub>=K<sub>a</sub> z+ <sub>w</sub>z
D.	p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub>z
Answer» D. p<sub>a</sub>=K<sub>a</sub> z* <sub>w</sub>z

13.	The resultant active pressure per unit length of wall for dry backfill with no surcharge acting at _________ above the base of wall.
A.	H/2
B.	H
C.	H/6
D.	H/3
Answer» E.

14.	The resultant active pressure per unit length of wall for dry backfill with no surcharge is _______
A.	(P_a= frac{1}{2}K_a H^2 )
B.	P<sub>a</sub>= H<sup>2</sup>
C.	P<sub>a</sub>=K<sub>a</sub> H<sup>2</sup>
D.	P<sub>a</sub>=K<sub>a</sub> H<sup>2</sup>
Answer» B. P<sub>a</sub>= H<sup>2</sup>

15.	For a dry backfill with no surcharge, the active earth pressure intensity is _________
A.	p<sub>a</sub>=K<sub>a</sub> H
B.	p<sub>a</sub>= H
C.	p<sub>a</sub>=K<sub>a</sub> H
D.	p<sub>a</sub>=K<sub>a</sub>
Answer» B. p<sub>a</sub>= H