Roadside plantation of trees shrubs
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Question No. 1
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What percentage of particulate matter can be reduced by roadside tree planting according to research?
A.
More than 50%
B.
Around 10%
C.
Less than 20%
D.
Approximately 30%
Question No. 2
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What is the recommended spacing between two trees in a row along the road?
A.
20 m to 25 m
B.
5 m to 8 m
C.
9 m to 12 m
D.
15 m to 20 m
Question No. 3
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Which of the following is
NOT
an advantage of roadside vegetation?
A.
Carbon dioxide sequestration
B.
Increases soil erosion
C.
Removes dust and pollutants from air
D.
Provides shade to road users
Question No. 4
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At what minimum distance from the center of the carriageway should trees be planted?
A.
12 m
B.
8 m
C.
6 m
D.
15 m
Question No. 5
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Which country launched the Green Highways Policy in 2015?
A.
India
B.
China
C.
United States
D.
Netherlands
Question No. 6
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What is the recommended spacing between plant to plant for first and second row in rural roads?
A.
10 to 12 m
B.
8 to 10 m
C.
4 to 6 m
D.
2 to 3 m
Question No. 7
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Which tree species is known for high oxygen production and pollutant absorption capacity?
A.
Samanea saman (Trembesi)
B.
Lantana camara
C.
Prosopis juliflora
D.
Ficus religiosa
Question No. 8
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What is the primary function of roadside shrubs in dust control?
A.
They create wind barriers
B.
They trap dust with their leaves
C.
They generate moisture
D.
They absorb dust through roots
Question No. 9
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What is the minimum distance from the embankment toe for planting the first row of trees?
A.
1.0 m
B.
0.5 m
C.
2.0 m
D.
1.5 m
Question No. 10
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Which planting scheme involves using the same species on both sides of the road to ensure uniform growth?
A.
Mixed species planting
B.
Staggered planting
C.
Random planting
D.
Single species avenue planting
Question No. 11
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What leaf area density is needed to ensure downwind pollutant reductions for particulate matter?
A.
2.0 m²/m³ or higher
B.
1.0 m²/m³ or higher
C.
5.0 m²/m³ or higher
D.
3.0 m²/m³ or higher
Question No. 12
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Which of the following trees is suitable for drying waterlogged road areas?
A.
Cassia fistula
B.
Eucalyptus
C.
Bauhinia variegata
D.
Ficus religiosa
Question No. 13
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Cassia fistula
is commonly known for its:
A.
White flowers
B.
Red flowers
C.
Blue flowers
D.
Yellow flowers
Question No. 14
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What is the recommended row-to-row spacing for roadside tree plantation?
A.
Minimum 2 m
B.
Minimum 1 m
C.
Minimum 3 m
D.
Minimum 5 m
Question No. 15
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Which shrub is described as drought tolerant and suitable for erosion control?
A.
Tecoma stans
B.
Lantana camara
C.
Bougainvillea spectabilis
D.
Vernonia angustifolia
Question No. 16
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What happens to roadside vegetation with large gaps and high porosity?
A.
It improves air quality significantly
B.
It has no effect on air quality
C.
It may increase downwind pollutant concentrations
D.
It reduces pollution effectively
Question No. 17
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Which of the following is a direct benefit of roadside plantations to local communities?
A.
Reduced land availability
B.
Increased road construction
C.
Timber, fruits, and bee pollination
D.
Higher vehicle speeds
Question No. 18
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What is the recommended size of planting pits for roadside trees?
A.
45x45x45 cm
B.
60x60x60 cm
C.
90x90x90 cm
D.
30x30x30 cm
Question No. 19
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Which flowering tree combination blooms at the same time and creates a pleasing color effect?
A.
Ficus religiosa - Eucalyptus
B.
Alstonia scholaris - Swietenia mahagoni
C.
Cassia fistula (yellow) - Delonix regia (red)
D.
Mimusops elengi - Polyalthia longifolia
Question No. 20
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What is the primary ecosystem service provided by urban roadside trees?
A.
Blocking sunlight completely
B.
Noise generation
C.
Increasing urban heat
D.
Providing ecosystem services and human wellbeing
Question No. 21
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How much pollutant can a large healthy tree remove in one year?
A.
1.5 lbs
B.
5.5 lbs
C.
3.5 lbs
D.
2.5 lbs
Question No. 22
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Which tree species is recommended for shady avenue plantation?
A.
Mimusops elengi
B.
Bauhinia variegata
C.
Delonix regia
D.
Cassia fistula
Question No. 23
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What percentage of roadside pollution can tall and dense vegetation reduce?
A.
Approximately 30%
B.
Approximately 50%
C.
Approximately 20%
D.
Approximately 10%
Question No. 24
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Which characteristic makes a tree species suitable for roadside dust interception?
A.
Smooth and glossy leaves
B.
Large and rough leaf surface with hairy texture
C.
Small needle-like leaves
D.
Waxy coating on leaves
Question No. 25
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What is the recommended minimum height for tree saplings at the time of roadside planting?
A.
0.8 m
B.
0.5 m
C.
2.0 m
D.
1.2 m
Question No. 26
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Which type of trees should be planted in the third (last) row of roadside plantation?
A.
Small ornamental trees
B.
Medium-sized flowering trees
C.
Shrubs only
D.
Tall and shade bearing trees
Question No. 27
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Delonix regia
is characterized by which flower color?
A.
Blue
B.
Red
C.
Pink
D.
Yellow
Question No. 28
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What is the main advantage of staggered planting pattern in roadside plantation?
A.
Reduces planting cost
B.
Requires less maintenance
C.
Allows faster growth
D.
Provides better shade throughout the year
Question No. 29
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Which atmospheric gas is sequestered by roadside trees?
A.
Carbon dioxide (CO₂)
B.
Argon (Ar)
C.
Nitrogen (N₂)
D.
Oxygen (O₂)
Question No. 30
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What happens to soil stability when trees with deep root structures are planted along roadsides?
A.
Soil erosion increases
B.
No change in soil properties
C.
Soil stability increases and water retention improves
D.
Soil becomes less stable
Question No. 31
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Which of the following is a pollution-tolerant shrub suitable for roadside planting?
A.
Bougainvillea spectabilis
B.
Hibiscus rosa-sinensis
C.
Gardenia jasminoides
D.
Rosa indica
Question No. 32
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What is the primary challenge faced by young roadside trees during drought?
A.
Too much shade
B.
Not in touch with deep water reservoirs
C.
Over-fertilization
D.
Excessive water availability
Question No. 33
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How do roadside trees contribute to flood control?
A.
By blocking all water flow
B.
By creating water channels
C.
By slowing and absorbing road runoff
D.
By increasing surface runoff
Question No. 34
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Which tree species combination blooms at different times extending the colorful period?
A.
Teak - Sal
B.
Ficus religiosa - Ficus benghalensis
C.
Eucalyptus - Neem
D.
Cassia fistula - Jacaranda acutifolia
Question No. 35
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What is the ideal characteristic of roadside vegetation for effective air pollution mitigation?
A.
Thick with full coverage from ground to canopy
B.
Sparse with many gaps
C.
Only tall trees without understory
D.
Thin with minimal foliage
Question No. 36
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Which tree is NOT recommended for roadside plantation due to safety concerns in windy conditions?
A.
Polyalthia longifolia
B.
Azadirachta indica
C.
Samanea saman with overhanging branches
D.
Alstonia scholaris
Question No. 37
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At median cut and grade separator, how much blank space should be left for clear view of traffic?
A.
At least 10 m
B.
At least 3 m
C.
At least 2 m
D.
At least 5 m
Question No. 38
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Which native tree species is highly recommended for avenue plantation in urban areas?
A.
Mimusops elengi
B.
Conocarpus erectus
C.
Eucalyptus globulus
D.
Acacia mangium
Question No. 39
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What effect does roadside tree planting have on crop protection?
A.
Increases dust deposition on crops
B.
No effect on nearby crops
C.
Protects crops by trapping road dust
D.
Reduces crop yield significantly
Question No. 40
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Which parameter showed negative correlation with dust load in roadside trees?
A.
Proline content
B.
Photosynthetic pigments
C.
Ascorbic acid
D.
pH levels
Question No. 41
Marks
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What is the recommended average spacing that requires 84 plants per km along highways?
A.
15 m
B.
8 m
C.
10 m
D.
12 m
Question No. 42
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Which tree species showed the highest dust accumulation capacity in urban areas?
A.
Bougainvillea spectabilis
B.
Lantana camara
C.
Ficus benghalensis
D.
Prosopis juliflora
Question No. 43
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What percentage of road investment did India's Green Highways Policy allocate for tree development?
A.
0.5%
B.
5%
C.
1%
D.
2%
Question No. 44
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Which factor is
MOST critical
for successful roadside vegetation in pollution mitigation?
A.
Only tree height
B.
Density with no gaps in vegetation barrier
C.
Only leaf color
D.
Only species selection
Question No. 45
Marks
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Time
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☰
How do roadside trees affect the urban heat island effect?
A.
Provide shade and reduce temperatures
B.
Only affect humidity
C.
Increase urban temperatures
D.
Have no effect on temperature
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