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CHAPTER 4 - EARTH RETAINING STRUCTURE

Total questions: 16

Worksheet time: 16mins

Name
Class
Date
1.

The main function of retaining walls is

a)

stabilize hillsides

b)

Control erosion

c)

to reduce the grades of roads

d)

all are correct

2.

The coefficient of active earth pressure is_______ than the coefficient of passive pressure.

a)

less than

b)

greater than

c)

equal to

d)

insufficient data

3.

If the angle of internal friction decreases, then Ka ___________

a)

decreases

b)

increases

c)

equal to zero

d)

does not change

4.

The ratio of horizontal stress σh to vertical stress σv is _______

a)

coefficient of earth pressure

b)

coefficient of volume change

c)

coefficient of compressibility

d)

coefficient of consolidation

5.

Below are design consideration of retaining wall except?

a)

Types of wall

b)

Ground water behind the wall

c)

Material used in the construction of wall

d)

cost involve

e)

Types of soil

6.

This wall resist the earth pressure exerted by backfill by its own self weight.

a)

gravity wall

b)

anchored wall

c)

cantilever wall

d)

pile wall

7.

All of there are components of retaining wall except?

a)

toe

b)

stem

c)

weep holes

d)

heel

e)

surcharge

8.

Gravity type retaining wall type is suitable for retaining backfill up to

a)

3-5 m

b)

5-8 m

c)

4 - 7 m

d)

Any hight

9.

Sheet piles are generally made of

a)

Concrete

b)

Steel

c)

Timber

d)

All of the above

10.

Point of contra flexure observed in which type of sheet pile

a)

Free cantilever sheet pile

b)

Cantilever Sheet Pile Wall with Backfill

c)

Free earth support anchored piles

d)

Fixed earth support anchored piles.

11.

Weep holes provided into retaining wall for the purpose of

a)

to provide drainage

b)

to prevent cracks due to shrinkage

c)

to avoid friction behind the wall

d)

to improve appearance

12.

An anchor sheet pile driven to a shallow depth will have

a)

free earth support

b)

fixed earth support

c)

roller support

d)

roller support

13.

The material retained by the retaining wall is known as_________

a)

slab

b)

roof

c)

backfill

d)

footing

14.

During the active state of plastic equilibrium, the retaining wall moves _______

a)

towards the fill

b)

away from the fill

c)

does not change its position

d)

remains in equilibrium

15.

During the passive state of plastic equilibrium, the retaining wall moves _______

a)

towards the fill

b)

away from the fill

c)

does not change its position

d)

remains in equilibrium

16.

On designing retaining walls it is necessary to take care of __________ exerted by soil mass.

a)

Erosion

b)

Lateral pressure

c)

Surcharge

d)

Lateral stress