Nevada C-10 Landscape Contractor
Exam Practice Test Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. The primary purpose of a landscape grading plan is to:
A. Increase plant growth rate
B. Direct surface water away from structures
C. Improve soil fertility
D. Reduce irrigation costs
Answer: Direct surface water away from structures
Rationale: Grading plans are designed to control drainage and prevent
water accumulation near buildings.
2. Which soil type drains the fastest?
A. Clay
B. Silt
C. Sand
D. Loam
Answer: Sand
Rationale: Sand particles are large, allowing rapid water movement.
3. A backflow preventer is used to:
A. Increase water pressure
, B. Prevent contamination of potable water
C. Reduce irrigation time
D. Filter debris from water
Answer: Prevent contamination of potable water
Rationale: It stops reverse flow that could introduce contaminants into
clean water systems.
4. The best time to fertilize most turf grasses is:
A. During peak heat
B. During dormancy only
C. During active growth
D. After frost
Answer: During active growth
Rationale: Plants absorb nutrients most effectively when actively growing.
5. Erosion control blankets are primarily used to:
A. Increase soil compaction
B. Prevent soil erosion on slopes
C. Improve irrigation flow
D. Kill weeds
Answer: Prevent soil erosion on slopes
Rationale: They stabilize soil and reduce runoff impact.
6. Which irrigation system is most efficient for water conservation?
A. Sprinkler
B. Flood irrigation
C. Drip irrigation
D. Hose-end watering
Answer: Drip irrigation
Rationale: Delivers water directly to the root zone, minimizing
evaporation.
7. The term “pH” refers to:
A. Soil texture
B. Soil acidity or alkalinity
, C. Soil compaction
D. Nutrient density
Answer: Soil acidity or alkalinity
Rationale: pH measures hydrogen ion concentration in soil.
8. A retaining wall is primarily used to:
A. Increase plant growth
B. Hold back soil on a slope
C. Improve drainage only
D. Reduce irrigation needs
Answer: Hold back soil on a slope
Rationale: It stabilizes elevation changes and prevents soil movement.
9. Mulch is used to:
A. Increase evaporation
B. Conserve moisture and suppress weeds
C. Harden soil
D. Raise soil pH
Answer: Conserve moisture and suppress weeds
Rationale: Mulch reduces water loss and blocks weed growth.
10.Which tool is used to level soil over large areas?
A. Pruning shears
B. Rake
C. Laser level
D. Trowel
Answer: Laser level
Rationale: Laser levels ensure precise grading over large distances.
11.A common cause of irrigation runoff is:
A. Low water pressure
B. Overwatering
C. Poor soil fertility
D. Excess mulch
Exam Practice Test Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. The primary purpose of a landscape grading plan is to:
A. Increase plant growth rate
B. Direct surface water away from structures
C. Improve soil fertility
D. Reduce irrigation costs
Answer: Direct surface water away from structures
Rationale: Grading plans are designed to control drainage and prevent
water accumulation near buildings.
2. Which soil type drains the fastest?
A. Clay
B. Silt
C. Sand
D. Loam
Answer: Sand
Rationale: Sand particles are large, allowing rapid water movement.
3. A backflow preventer is used to:
A. Increase water pressure
, B. Prevent contamination of potable water
C. Reduce irrigation time
D. Filter debris from water
Answer: Prevent contamination of potable water
Rationale: It stops reverse flow that could introduce contaminants into
clean water systems.
4. The best time to fertilize most turf grasses is:
A. During peak heat
B. During dormancy only
C. During active growth
D. After frost
Answer: During active growth
Rationale: Plants absorb nutrients most effectively when actively growing.
5. Erosion control blankets are primarily used to:
A. Increase soil compaction
B. Prevent soil erosion on slopes
C. Improve irrigation flow
D. Kill weeds
Answer: Prevent soil erosion on slopes
Rationale: They stabilize soil and reduce runoff impact.
6. Which irrigation system is most efficient for water conservation?
A. Sprinkler
B. Flood irrigation
C. Drip irrigation
D. Hose-end watering
Answer: Drip irrigation
Rationale: Delivers water directly to the root zone, minimizing
evaporation.
7. The term “pH” refers to:
A. Soil texture
B. Soil acidity or alkalinity
, C. Soil compaction
D. Nutrient density
Answer: Soil acidity or alkalinity
Rationale: pH measures hydrogen ion concentration in soil.
8. A retaining wall is primarily used to:
A. Increase plant growth
B. Hold back soil on a slope
C. Improve drainage only
D. Reduce irrigation needs
Answer: Hold back soil on a slope
Rationale: It stabilizes elevation changes and prevents soil movement.
9. Mulch is used to:
A. Increase evaporation
B. Conserve moisture and suppress weeds
C. Harden soil
D. Raise soil pH
Answer: Conserve moisture and suppress weeds
Rationale: Mulch reduces water loss and blocks weed growth.
10.Which tool is used to level soil over large areas?
A. Pruning shears
B. Rake
C. Laser level
D. Trowel
Answer: Laser level
Rationale: Laser levels ensure precise grading over large distances.
11.A common cause of irrigation runoff is:
A. Low water pressure
B. Overwatering
C. Poor soil fertility
D. Excess mulch
