Florida Irrigation Contractor
Examination 2026 — 100 Questions &
Answers with Detailed Rationales |
Complete Practice Exam & Study Guide
1. What is the primary purpose of an irrigation system?
A. To increase soil compaction
B. To deliver water to plants at the required rate and time
C. To eliminate all natural rainfall
D. To increase fertilizer concentration
Answer: To deliver water to plants at the required rate and time
Rationale: An irrigation system is designed to apply water efficiently and
uniformly to meet landscape or plant water requirements.
2. Which hydraulic principle states that pressure decreases as elevation
increases?
A. Bernoulli's principle
B. Pascal's law
C. Hydrostatic equilibrium
D. Boyle's law
Answer: Bernoulli's principle
,Rationale: Bernoulli's equation accounts for changes in pressure, velocity, and
elevation within flowing water systems.
3. Approximately how much pressure is lost due to elevation gain of 1 foot?
A. 0.10 psi
B. 0.43 psi
C. 1.00 psi
D. 2.31 psi
Answer: 0.43 psi
Rationale: A vertical water column produces approximately 0.433 psi of pressure
change per foot of elevation.
4. Approximately how many feet of water column are equivalent to 1 psi?
A. 0.43 feet
B. 1.00 foot
C. 2.31 feet
D. 10.00 feet
Answer: 2.31 feet
Rationale: One psi is approximately equal to 2.31 feet of water head.
5. What does GPM stand for?
A. Gallons per minute
B. Gallons per meter
C. Gravity pressure measurement
D. Groundwater pressure movement
Answer: Gallons per minute
Rationale: GPM is the standard flow-rate unit commonly used when sizing
irrigation piping, pumps, and zones.
6. What is the main purpose of dividing an irrigation system into zones?
,A. To eliminate valves
B. To operate all sprinklers simultaneously
C. To match water demand with available flow and pressure
D. To increase pipe friction
Answer: To match water demand with available flow and pressure
Rationale: Zoning allows irrigation demand to remain within the available
hydraulic capacity of the water source and piping.
7. What is friction loss?
A. Water gained through pipe movement
B. Pressure or energy lost as water flows through pipe and fittings
C. Pressure created by a pump
D. Water lost only through evaporation
Answer: Pressure or energy lost as water flows through pipe and fittings
Rationale: Friction between moving water and the interior of pipes and fittings
causes energy loss, reducing available pressure downstream.
8. Which generally produces less friction loss for a given flow?
A. Smaller pipe
B. Larger pipe
C. Smaller valve
D. Smaller fitting
Answer: Larger pipe
Rationale: Larger pipe provides greater flow area and generally reduces velocity
and friction loss.
9. What is the purpose of an irrigation valve?
A. To measure rainfall
B. To control water flow to an irrigation zone
, C. To increase soil pH
D. To filter fertilizer
Answer: To control water flow to an irrigation zone
Rationale: Irrigation control valves open and close to regulate water delivery to
individual zones or sections.
10.What component commonly activates an automatic irrigation valve?
A. Solenoid
B. Pressure gauge
C. Strainer
D. Rotor
Answer: Solenoid
Rationale: An electrically operated solenoid controls the opening and closing of
many automatic irrigation valves.
11.What is the purpose of an irrigation controller?
A. To increase pipe diameter
B. To schedule and control irrigation operation
C. To filter groundwater
D. To calculate soil density
Answer: To schedule and control irrigation operation
Rationale: Controllers determine when irrigation zones operate and, depending
on the system, can adjust run times based on environmental conditions.
12.What does a rain sensor typically do?
A. Increase irrigation during rainfall
B. Interrupt or suspend irrigation when sufficient rainfall occurs
C. Increase pump speed
D. Increase sprinkler pressure
Examination 2026 — 100 Questions &
Answers with Detailed Rationales |
Complete Practice Exam & Study Guide
1. What is the primary purpose of an irrigation system?
A. To increase soil compaction
B. To deliver water to plants at the required rate and time
C. To eliminate all natural rainfall
D. To increase fertilizer concentration
Answer: To deliver water to plants at the required rate and time
Rationale: An irrigation system is designed to apply water efficiently and
uniformly to meet landscape or plant water requirements.
2. Which hydraulic principle states that pressure decreases as elevation
increases?
A. Bernoulli's principle
B. Pascal's law
C. Hydrostatic equilibrium
D. Boyle's law
Answer: Bernoulli's principle
,Rationale: Bernoulli's equation accounts for changes in pressure, velocity, and
elevation within flowing water systems.
3. Approximately how much pressure is lost due to elevation gain of 1 foot?
A. 0.10 psi
B. 0.43 psi
C. 1.00 psi
D. 2.31 psi
Answer: 0.43 psi
Rationale: A vertical water column produces approximately 0.433 psi of pressure
change per foot of elevation.
4. Approximately how many feet of water column are equivalent to 1 psi?
A. 0.43 feet
B. 1.00 foot
C. 2.31 feet
D. 10.00 feet
Answer: 2.31 feet
Rationale: One psi is approximately equal to 2.31 feet of water head.
5. What does GPM stand for?
A. Gallons per minute
B. Gallons per meter
C. Gravity pressure measurement
D. Groundwater pressure movement
Answer: Gallons per minute
Rationale: GPM is the standard flow-rate unit commonly used when sizing
irrigation piping, pumps, and zones.
6. What is the main purpose of dividing an irrigation system into zones?
,A. To eliminate valves
B. To operate all sprinklers simultaneously
C. To match water demand with available flow and pressure
D. To increase pipe friction
Answer: To match water demand with available flow and pressure
Rationale: Zoning allows irrigation demand to remain within the available
hydraulic capacity of the water source and piping.
7. What is friction loss?
A. Water gained through pipe movement
B. Pressure or energy lost as water flows through pipe and fittings
C. Pressure created by a pump
D. Water lost only through evaporation
Answer: Pressure or energy lost as water flows through pipe and fittings
Rationale: Friction between moving water and the interior of pipes and fittings
causes energy loss, reducing available pressure downstream.
8. Which generally produces less friction loss for a given flow?
A. Smaller pipe
B. Larger pipe
C. Smaller valve
D. Smaller fitting
Answer: Larger pipe
Rationale: Larger pipe provides greater flow area and generally reduces velocity
and friction loss.
9. What is the purpose of an irrigation valve?
A. To measure rainfall
B. To control water flow to an irrigation zone
, C. To increase soil pH
D. To filter fertilizer
Answer: To control water flow to an irrigation zone
Rationale: Irrigation control valves open and close to regulate water delivery to
individual zones or sections.
10.What component commonly activates an automatic irrigation valve?
A. Solenoid
B. Pressure gauge
C. Strainer
D. Rotor
Answer: Solenoid
Rationale: An electrically operated solenoid controls the opening and closing of
many automatic irrigation valves.
11.What is the purpose of an irrigation controller?
A. To increase pipe diameter
B. To schedule and control irrigation operation
C. To filter groundwater
D. To calculate soil density
Answer: To schedule and control irrigation operation
Rationale: Controllers determine when irrigation zones operate and, depending
on the system, can adjust run times based on environmental conditions.
12.What does a rain sensor typically do?
A. Increase irrigation during rainfall
B. Interrupt or suspend irrigation when sufficient rainfall occurs
C. Increase pump speed
D. Increase sprinkler pressure
