C-27 LANDSCAPING CONTRACTOR LICENSE EXAM – ACTUAL EXAM
PRACTICE QUESTIONS AND 100% VERIFIED CORRECT ANSWERS |
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CORE DOMAINS
Planning and Estimation: Project math, plan reading, and material take-offs.
Hardscape Installation: Masonry, drainage, lighting, and woodwork.
Irrigation Systems: Design, hydraulics, controllers, and backflow prevention.
Planting and Turf: Plant identification, soil preparation, and sod/seed
installation.
Maintenance: Pruning, pest control, and fertilization.
Safety and Environmental Compliance: OSHA regulations and water
management.
TABLE OF CONTENTS
1. Introduction ........................................................... Page 1
2. Core Domain Overview .................................................... Page 1
3. Section 1: Questions 1–35 ............................................... Page 2
4. Section 2: Questions 36–70 .............................................. Page 6
, 5. Section 3: Questions 71–105 ............................................. Page 10
6. Section 4: Questions 106–140 ............................................ Page 14
7. Section 5: Questions 141–200 ............................................ Page 18
8. Answer Key Summary ...................................................... Page 25
INTRODUCTION
The C-27 Landscaping Contractor Practice Exam is designed to prepare candidates
for the rigorous California state licensing process. This assessment focuses on the
essential skills required to design, install, and maintain exterior spaces that are both
aesthetically pleasing and structurally sound. The exam evaluates a candidate's
knowledge of irrigation hydraulics, soil science, hardscape construction, and
regulatory safety standards. Through a mix of theoretical questions and practical,
scenario-based problems, this testbank emphasizes professional decision-making and
the application of environmental laws, ensuring that a licensed contractor can operate
effectively and safely in the field.
SECTION 1: QUESTIONS 1–35
1. Which of the following is the most important factor when determining the size of a
mainline pipe for a large irrigation system?
A. The number of valves in the system
🔴 B. The total GPM required and the available water pressure
C. The distance from the controller to the last valve
D. The type of plant material being irrigated
, 🔵 Explanation: Sizing a mainline requires calculating the flow rate (GPM) to
ensure the velocity does not exceed 5 feet per second, preventing water hammer
and pressure loss.
2. When installing a low-voltage lighting system, what happens to the voltage as the
distance from the transformer increases?
A. Voltage increases
B. Voltage remains constant
🔴 C. Voltage drops
D. Amperage increases
🔵 Explanation: Voltage drop occurs due to the resistance of the wire over a long
distance; larger gauge wire is often needed to compensate.
3. What is the standard slope required for a residential patio to ensure proper
drainage away from a structure?
A. 1/8 inch per foot
🔴 B. 1/4 inch per foot
C. 1/2 inch per foot
D. 1 inch per foot
🔵 Explanation: A 2% grade, or 1/4 inch per foot, is the industry standard to
prevent water from pooling or running back toward the foundation.
4. Which soil type has the highest water-holding capacity but the slowest infiltration
rate?
A. Sand
B. Loam
🔴 C. Clay
, D. Silt
🔵 Explanation: Clay particles are the smallest and most tightly packed, allowing
them to hold more water while significantly slowing the rate at which water enters
the soil.
5. What is the primary purpose of a backflow prevention device in an irrigation
system?
🔴 A. To prevent contaminated water from entering the potable water supply
B. To regulate the pressure going to the sprinkler heads
C. To prevent the pump from losing its prime
D. To stop water from draining out of the lowest head
🔵 Explanation: Backflow preventers are required by law to protect the public
drinking water system from fertilizers or pesticides that may enter the irrigation
lines.
6. A contractor is estimating a lawn installation for a 2,500 square foot area using
sod. If each piece of sod is 10 square feet, how many pieces are needed,
including a 5% waste factor?
A. 250
B. 255
🔴 C. 263
D. 275
🔵 Explanation: 2,500 divided by 10 equals 250 pieces. 250 multiplied by 1.05
(5% waste) equals 262.5, which rounds up to 263.
7. Which of the following is a symptom of nitrogen deficiency in most ornamental
plants?
PRACTICE QUESTIONS AND 100% VERIFIED CORRECT ANSWERS |
COMPLETE EXAM PREP TESTBANK | GUARANTEED PASS | INSTANT
DOWNLOAD PDF
CORE DOMAINS
Planning and Estimation: Project math, plan reading, and material take-offs.
Hardscape Installation: Masonry, drainage, lighting, and woodwork.
Irrigation Systems: Design, hydraulics, controllers, and backflow prevention.
Planting and Turf: Plant identification, soil preparation, and sod/seed
installation.
Maintenance: Pruning, pest control, and fertilization.
Safety and Environmental Compliance: OSHA regulations and water
management.
TABLE OF CONTENTS
1. Introduction ........................................................... Page 1
2. Core Domain Overview .................................................... Page 1
3. Section 1: Questions 1–35 ............................................... Page 2
4. Section 2: Questions 36–70 .............................................. Page 6
, 5. Section 3: Questions 71–105 ............................................. Page 10
6. Section 4: Questions 106–140 ............................................ Page 14
7. Section 5: Questions 141–200 ............................................ Page 18
8. Answer Key Summary ...................................................... Page 25
INTRODUCTION
The C-27 Landscaping Contractor Practice Exam is designed to prepare candidates
for the rigorous California state licensing process. This assessment focuses on the
essential skills required to design, install, and maintain exterior spaces that are both
aesthetically pleasing and structurally sound. The exam evaluates a candidate's
knowledge of irrigation hydraulics, soil science, hardscape construction, and
regulatory safety standards. Through a mix of theoretical questions and practical,
scenario-based problems, this testbank emphasizes professional decision-making and
the application of environmental laws, ensuring that a licensed contractor can operate
effectively and safely in the field.
SECTION 1: QUESTIONS 1–35
1. Which of the following is the most important factor when determining the size of a
mainline pipe for a large irrigation system?
A. The number of valves in the system
🔴 B. The total GPM required and the available water pressure
C. The distance from the controller to the last valve
D. The type of plant material being irrigated
, 🔵 Explanation: Sizing a mainline requires calculating the flow rate (GPM) to
ensure the velocity does not exceed 5 feet per second, preventing water hammer
and pressure loss.
2. When installing a low-voltage lighting system, what happens to the voltage as the
distance from the transformer increases?
A. Voltage increases
B. Voltage remains constant
🔴 C. Voltage drops
D. Amperage increases
🔵 Explanation: Voltage drop occurs due to the resistance of the wire over a long
distance; larger gauge wire is often needed to compensate.
3. What is the standard slope required for a residential patio to ensure proper
drainage away from a structure?
A. 1/8 inch per foot
🔴 B. 1/4 inch per foot
C. 1/2 inch per foot
D. 1 inch per foot
🔵 Explanation: A 2% grade, or 1/4 inch per foot, is the industry standard to
prevent water from pooling or running back toward the foundation.
4. Which soil type has the highest water-holding capacity but the slowest infiltration
rate?
A. Sand
B. Loam
🔴 C. Clay
, D. Silt
🔵 Explanation: Clay particles are the smallest and most tightly packed, allowing
them to hold more water while significantly slowing the rate at which water enters
the soil.
5. What is the primary purpose of a backflow prevention device in an irrigation
system?
🔴 A. To prevent contaminated water from entering the potable water supply
B. To regulate the pressure going to the sprinkler heads
C. To prevent the pump from losing its prime
D. To stop water from draining out of the lowest head
🔵 Explanation: Backflow preventers are required by law to protect the public
drinking water system from fertilizers or pesticides that may enter the irrigation
lines.
6. A contractor is estimating a lawn installation for a 2,500 square foot area using
sod. If each piece of sod is 10 square feet, how many pieces are needed,
including a 5% waste factor?
A. 250
B. 255
🔴 C. 263
D. 275
🔵 Explanation: 2,500 divided by 10 equals 250 pieces. 250 multiplied by 1.05
(5% waste) equals 262.5, which rounds up to 263.
7. Which of the following is a symptom of nitrogen deficiency in most ornamental
plants?
