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Geosynthetics Quiz

Total questions: 50

Worksheet time: 40mins

Name
Class
Date
1.

Which type of geotextile is most suitable for road reinforcement due to its high tensile strength?

a)

Knitted

b)

Non-woven

c)

Woven

d)

Composite

2.

Who first introduced geotextiles in the 1950s?

a)

Netlon Ltd.

b)

R.J. Barrett

c)

ASTM International

d)

Maccaferri

3.

The main function of geogrids is:

a)

Filtration

b)

Reinforcement

c)

Drainage

d)

Protection

4.

Which geogrid type provides strength mainly in one direction?

a)

Uniaxial

b)

Biaxial

c)

Triaxial

d)

Multilayer

5.

Geonets are primarily used for:

a)

Soil reinforcement

b)

Drainage

c)

Separation

d)

Waterproofing

6.

HDPE geomembranes are mostly preferred for:

a)

Flexibility and ease of installation

b)

High durability and chemical resistance

c)

Resistance to UV degradation in outdoor ponds

d)

Cost-effectiveness

7.

Which geosynthetic is often used as a substitute for granular soil filters?

a)

Geogrids

b)

Geonets

c)

Geotextiles

d)

Geomembranes

8.

The test method used to determine geotextile puncture resistance is:

a)

ASTM D6637

b)

ASTM D5261

c)

ASTM D6241

d)

ASTM D4595

9.

A biaxial geogrid is most suitable for:

a)

Landfills

b)

Retaining walls

c)

Road stabilization

d)

Mining

10.

Which geomembrane type is known for being elastic and long-lasting in outdoor conditions?

a)

HDPE

b)

EPDM

c)

PVC

d)

LLDPE

11.

The main disadvantage of geonets is:

a)

Poor drainage

b)

Limited strength for reinforcement

c)

High installation cost

d)

Susceptibility to UV degradation

12.

Which geotextile type is best for filtration and drainage?

a)

Woven

b)

Non-woven

c)

Knitted

d)

Composite

13.

The first commercial geogrid was developed in:

a)

USA

b)

France

c)

United Kingdom

d)

Japan

14.

Which ASTM test measures tensile strength of geogrids?

a)

ASTM D6637

b)

ASTM D7737

c)

ASTM D7864

d)

ASTM D5199

15.

What is the primary function of geomembranes?

a)

Reinforcement

b)

Impermeability

c)

Filtration

d)

Separation

16.

Which geosynthetic prevents mixing of two soil layers?

a)

Geonets

b)

Geogrids

c)

Geotextiles

d)

Geomembranes

17.

A triplanar geonet is used to:

a)

Increase tensile resistance

b)

Improve in-plane flow

c)

Provide separation

d)

Reduce soil mixing

18.

In slope stabilization projects, which material is most effective for reinforcement?

a)

Geonet

b)

Geogrid

c)

Geotextile (non-woven)

d)

Geomembrane

19.

Which geomembrane type is prone to UV degradation if left uncovered?

a)

HDPE

b)

LDPE

c)

PVC

d)

EPDM

20.

Which geosynthetic material was used in the Central Luzon Link Expressway (CLLEx) as basal reinforcement?

a)

Non-woven geotextile

b)

HDPE geomembrane

c)

Woven geotextile

d)

Triaxial geogrid

21.

A permeable fabric used for separation, filtration, and drainage.

(a)  

22.

Net-like geosynthetic used for in-plane drainage of fluids and gases.

(a)  

23.

Synthetic liner used as an impermeable barrier in landfills.

(a)  

24.

Geosynthetic material designed to reinforce soil with grid-like apertures.

(a)  

25.

The geotextile type produced by interlooping yarns, similar to knitting.

(a)  

26.

The ASTM test for water flow capability in geotextiles.

(a)  

27.

The process of welding geomembrane seams for leak-proof joints.

(a)  

28.

The property of geogrids that prevents significant stretching under load.

(a)  

29.

The country where geogrids were first commercialized in 1978.

(a)  

30.

The geomembrane type most commonly used for heap leach pads in mining.

(a)  

31.

A geotextile function that prevents two soil layers from mixing.

(a)  

32.

The ASTM test for determining junction strength of geogrids.

(a)  

33.

A disadvantage of geotextiles related to environmental pollution.

(a)  

34.

The geomembrane type considered the most expensive but highly UV and ozone resistant.

(a)  

35.

The geosynthetic used in NAIA Expressway for road base reinforcement.

(a)  

36.

Enumerate three types of geotextiles.

(a)  

37.

Enumerate three applications of geogrids.

(a)  

38.

Enumerate two main functions of geonets.

(a)  

39.

Enumerate three functions of geotextiles.

(a)  

40.

Enumerate three applications of geomembranes.

(a)  

41.

Enumerate four ASTM test methods for geotextiles.

(a)  

42.

Enumerate three advantages of geogrids.

(a)  

43.

Enumerate two disadvantages of geomembranes.

(a)  

44.

Enumerate three geomembrane types and their uses.

(a)  

45.

Enumerate two local Philippine projects using geotextiles.

(a)  

46.

Enumerate two local projects where geogrids were applied.

(a)  

47.

Enumerate two international projects using geomembranes.

(a)  

48.

Enumerate three disadvantages of geotextiles.

(a)  

49.

Enumerate three advantages of geomembranes.

(a)  

50.

Enumerate four suppliers of geosynthetics in the Philippines (any type).

(a)