Nevada C-10 Landscape Contractor
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. Which soil type is most suitable for most landscape plants due to its
good drainage and nutrient retention?
A. Sand
B. Clay
C. Loam
D. Silt
Rationale: Loam is considered ideal for landscape plants because it
balances drainage, aeration, and nutrient retention.
2. What is the recommended minimum depth for planting a tree's root
ball?
A. 6 inches
B. 12 inches
C. Same depth as it was in the container or nursery
D. 24 inches
Rationale: Planting at the same depth prevents root suffocation and
promotes healthy establishment.
3. Which of the following is the best method to prevent soil erosion on a
steep slope?
A. Using sand
B. Planting ground covers or terraces
C. Adding mulch only
D. Sprinkler irrigation
Rationale: Ground covers or terraces stabilize soil and reduce erosion
effectively on slopes.
,4. What is the main purpose of a drip irrigation system?
A. To water the lawn quickly
B. To provide slow, targeted watering to plant roots
C. To wash away weeds
D. To fertilize only
Rationale: Drip irrigation delivers water directly to the root zone,
conserving water and reducing runoff.
5. Which landscape plant is considered drought-tolerant?
A. Fern
B. Lavender
C. Rice
D. Azalea
Rationale: Lavender can survive with minimal water once
established, making it drought-tolerant.
6. When installing a retaining wall, what factor is most important to
ensure stability?
A. Wall color
B. Proper drainage behind the wall
C. Planting flowers on top
D. Using only clay soil
Rationale: Drainage prevents hydrostatic pressure build-up, which
can cause wall failure.
7. What is the recommended slope for proper drainage in a landscape?
A. 1–2% away from structures
B. 5–10% toward structures
C. 1–2% away from structures
D. Flat is acceptable
Rationale: A slight slope of 1–2% directs water away from buildings
to prevent damage.
8. Which pruning technique is used to encourage flowering in shrubs?
A. Deadheading
B. Heading back
C. Coppicing
D. Pollarding
Rationale: Heading back encourages new growth that produces more
flowers.
, 9. Which type of mulch is best for reducing soil evaporation and
controlling weeds?
A. Plastic mulch
B. Organic mulch like bark or wood chips
C. Sand
D. Gravel only
Rationale: Organic mulch retains moisture, suppresses weeds, and
improves soil quality as it decomposes.
10. What is the most important factor in selecting turfgrass for a
Nevada landscape?
A. Color
B. Drought tolerance
C. Height
D. Texture
Rationale: Due to Nevada’s arid climate, selecting drought-tolerant
grass conserves water and ensures survival.
11. What is a xeriscape landscape designed for?
A. Maximum water use
B. Minimal water use
C. High maintenance
D. Full shade only
Rationale: Xeriscaping focuses on water-efficient landscaping using
drought-tolerant plants and materials.
12. Which of the following is a benefit of using native plants in
landscaping?
A. They require more water
B. They grow slower
C. They are adapted to local conditions and require less
maintenance
D. They attract pests
Rationale: Native plants thrive in their natural environment,
reducing irrigation and care needs.
13. When installing irrigation, what is the standard pressure range for
residential sprinkler systems?
A. 5–10 psi
B. 10–15 psi
C. 30–50 psi
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. Which soil type is most suitable for most landscape plants due to its
good drainage and nutrient retention?
A. Sand
B. Clay
C. Loam
D. Silt
Rationale: Loam is considered ideal for landscape plants because it
balances drainage, aeration, and nutrient retention.
2. What is the recommended minimum depth for planting a tree's root
ball?
A. 6 inches
B. 12 inches
C. Same depth as it was in the container or nursery
D. 24 inches
Rationale: Planting at the same depth prevents root suffocation and
promotes healthy establishment.
3. Which of the following is the best method to prevent soil erosion on a
steep slope?
A. Using sand
B. Planting ground covers or terraces
C. Adding mulch only
D. Sprinkler irrigation
Rationale: Ground covers or terraces stabilize soil and reduce erosion
effectively on slopes.
,4. What is the main purpose of a drip irrigation system?
A. To water the lawn quickly
B. To provide slow, targeted watering to plant roots
C. To wash away weeds
D. To fertilize only
Rationale: Drip irrigation delivers water directly to the root zone,
conserving water and reducing runoff.
5. Which landscape plant is considered drought-tolerant?
A. Fern
B. Lavender
C. Rice
D. Azalea
Rationale: Lavender can survive with minimal water once
established, making it drought-tolerant.
6. When installing a retaining wall, what factor is most important to
ensure stability?
A. Wall color
B. Proper drainage behind the wall
C. Planting flowers on top
D. Using only clay soil
Rationale: Drainage prevents hydrostatic pressure build-up, which
can cause wall failure.
7. What is the recommended slope for proper drainage in a landscape?
A. 1–2% away from structures
B. 5–10% toward structures
C. 1–2% away from structures
D. Flat is acceptable
Rationale: A slight slope of 1–2% directs water away from buildings
to prevent damage.
8. Which pruning technique is used to encourage flowering in shrubs?
A. Deadheading
B. Heading back
C. Coppicing
D. Pollarding
Rationale: Heading back encourages new growth that produces more
flowers.
, 9. Which type of mulch is best for reducing soil evaporation and
controlling weeds?
A. Plastic mulch
B. Organic mulch like bark or wood chips
C. Sand
D. Gravel only
Rationale: Organic mulch retains moisture, suppresses weeds, and
improves soil quality as it decomposes.
10. What is the most important factor in selecting turfgrass for a
Nevada landscape?
A. Color
B. Drought tolerance
C. Height
D. Texture
Rationale: Due to Nevada’s arid climate, selecting drought-tolerant
grass conserves water and ensures survival.
11. What is a xeriscape landscape designed for?
A. Maximum water use
B. Minimal water use
C. High maintenance
D. Full shade only
Rationale: Xeriscaping focuses on water-efficient landscaping using
drought-tolerant plants and materials.
12. Which of the following is a benefit of using native plants in
landscaping?
A. They require more water
B. They grow slower
C. They are adapted to local conditions and require less
maintenance
D. They attract pests
Rationale: Native plants thrive in their natural environment,
reducing irrigation and care needs.
13. When installing irrigation, what is the standard pressure range for
residential sprinkler systems?
A. 5–10 psi
B. 10–15 psi
C. 30–50 psi
