Nevada C-10 Landscape Contractor
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of grading in landscape construction?
A. Improve plant color
B. Increase soil nutrients
C. Control drainage and prevent erosion
D. Reduce labor costs
Grading ensures proper water flow away from structures and
prevents erosion-related damage.
2. Which irrigation system is most water-efficient for planting beds?
A. Flood irrigation
B. Spray irrigation
C. Drip irrigation
D. Furrow irrigation
Drip irrigation delivers water directly to roots, minimizing
evaporation and runoff.
3. What is the standard slope away from a building foundation?
A. 1 inch per 10 feet
B. 6 inches over 10 feet
C. 1 foot per 10 feet
D. 3 inches per 10 feet
A 6-inch drop over 10 feet helps direct water away from foundations.
4. What does pH measure in soil?
A. Nutrient content
, B. Water retention
C. Acidity or alkalinity
D. Soil density
Soil pH determines nutrient availability and plant health.
5. Which material is best for improving clay soil drainage?
A. Sand only
B. Gravel
C. Organic compost
D. Lime
Organic compost improves structure and drainage in clay soils.
6. What is the purpose of mulch?
A. Increase soil pH
B. Attract insects
C. Retain moisture and suppress weeds
D. Harden soil
Mulch conserves moisture and reduces weed growth.
7. What type of valve controls water flow automatically in irrigation
systems?
A. Gate valve
B. Ball valve
C. Solenoid valve
D. Check valve
Solenoid valves are electrically controlled for automated irrigation.
8. What is backflow in irrigation?
A. Water moving forward
B. Contaminated water reversing into clean supply
C. Water pressure increase
D. Drainage runoff
Backflow can contaminate potable water, requiring prevention
devices.
9. Which device prevents irrigation backflow?
A. Pressure regulator
B. Backflow preventer
C. Timer
, D. Valve box
Backflow preventers protect drinking water systems.
10. What is the best time to water landscapes?
A. Noon
B. Afternoon
C. Early morning
D. Midnight
Early watering reduces evaporation and disease risk.
11. What is hardscape?
A. Plant materials
B. Soil amendments
C. Non-living landscape elements
D. Fertilizers
Hardscape includes patios, walls, and walkways.
12. Which material is commonly used for retaining walls?
A. Plastic
B. Concrete block
C. Paper
D. Foam
Concrete blocks provide strength and durability.
13. What is the function of a retaining wall?
A. Store water
B. Grow plants
C. Hold back soil
D. Increase sunlight
Retaining walls prevent soil movement on slopes.
14. What is compaction in soil?
A. Soil expansion
B. Reduction of air spaces in soil
C. Water saturation
D. Nutrient increase
Compaction limits root growth and drainage.
15. What tool is used to measure slope?
A. Tape measure
B. Level or transit
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of grading in landscape construction?
A. Improve plant color
B. Increase soil nutrients
C. Control drainage and prevent erosion
D. Reduce labor costs
Grading ensures proper water flow away from structures and
prevents erosion-related damage.
2. Which irrigation system is most water-efficient for planting beds?
A. Flood irrigation
B. Spray irrigation
C. Drip irrigation
D. Furrow irrigation
Drip irrigation delivers water directly to roots, minimizing
evaporation and runoff.
3. What is the standard slope away from a building foundation?
A. 1 inch per 10 feet
B. 6 inches over 10 feet
C. 1 foot per 10 feet
D. 3 inches per 10 feet
A 6-inch drop over 10 feet helps direct water away from foundations.
4. What does pH measure in soil?
A. Nutrient content
, B. Water retention
C. Acidity or alkalinity
D. Soil density
Soil pH determines nutrient availability and plant health.
5. Which material is best for improving clay soil drainage?
A. Sand only
B. Gravel
C. Organic compost
D. Lime
Organic compost improves structure and drainage in clay soils.
6. What is the purpose of mulch?
A. Increase soil pH
B. Attract insects
C. Retain moisture and suppress weeds
D. Harden soil
Mulch conserves moisture and reduces weed growth.
7. What type of valve controls water flow automatically in irrigation
systems?
A. Gate valve
B. Ball valve
C. Solenoid valve
D. Check valve
Solenoid valves are electrically controlled for automated irrigation.
8. What is backflow in irrigation?
A. Water moving forward
B. Contaminated water reversing into clean supply
C. Water pressure increase
D. Drainage runoff
Backflow can contaminate potable water, requiring prevention
devices.
9. Which device prevents irrigation backflow?
A. Pressure regulator
B. Backflow preventer
C. Timer
, D. Valve box
Backflow preventers protect drinking water systems.
10. What is the best time to water landscapes?
A. Noon
B. Afternoon
C. Early morning
D. Midnight
Early watering reduces evaporation and disease risk.
11. What is hardscape?
A. Plant materials
B. Soil amendments
C. Non-living landscape elements
D. Fertilizers
Hardscape includes patios, walls, and walkways.
12. Which material is commonly used for retaining walls?
A. Plastic
B. Concrete block
C. Paper
D. Foam
Concrete blocks provide strength and durability.
13. What is the function of a retaining wall?
A. Store water
B. Grow plants
C. Hold back soil
D. Increase sunlight
Retaining walls prevent soil movement on slopes.
14. What is compaction in soil?
A. Soil expansion
B. Reduction of air spaces in soil
C. Water saturation
D. Nutrient increase
Compaction limits root growth and drainage.
15. What tool is used to measure slope?
A. Tape measure
B. Level or transit
