CR 21 LANDSCAPES AND IRRIGATION AZROC
TEST PREP COMPLETE STUDY GUIDE 2026
◉ Backflow preventer. Answer: A device in an irrigation system that
prevents contaminated water from flowing back into the potable
water supply.
◉ Drip irrigation. Answer: An irrigation method that delivers water
directly to the roots of plants, minimizing evaporation and water
loss, making it highly efficient in arid climates.
◉ Solenoid valve. Answer: A device in an irrigation system that
opens and closes water flow electronically, controlled by the
irrigation controller.
◉ Precipitation rate. Answer: The speed at which water is applied to
an area in irrigation systems, indicating how much water is applied
over a given area in a specific period.
◉ Micro-sprinklers. Answer: Irrigation sprinklers that are ideal for
irregularly shaped landscapes, allowing targeted water application
with flexible coverage patterns.
,◉ Soil type. Answer: A critical factor when designing an irrigation
system, influencing water infiltration and retention.
◉ Rain sensor. Answer: It shuts off the system during rainfall.
◉ PVC (Polyvinyl Chloride). Answer: PVC is durable, lightweight, and
resistant to corrosion, making it the preferred material for
residential irrigation pipelines.
◉ Zone valve. Answer: To divide the system into manageable areas.
◉ Irrigation scheduling factors. Answer: Weather conditions and soil
moisture levels.
◉ Ideal water pressure for drip irrigation. Answer: 10-20 psi.
◉ Head-to-head coverage. Answer: Overlapping sprinkler coverage
for uniform watering.
◉ Drip emitter. Answer: To release water slowly to the base of
plants.
◉ Issue caused by overwatering. Answer: Increased pest activity.
,◉ Irrigation Controller. Answer: To program and automate watering
schedules.
◉ Clay Soil. Answer: Requires shorter, more frequent irrigation
cycles to prevent water runoff.
◉ Smart Irrigation System. Answer: Increased water efficiency and
conservation.
◉ Polyethylene Tubing. Answer: Flexibility and ease of installation.
◉ Flow Sensor. Answer: Volume of water passing through the
system.
◉ Drip Irrigation (Sloped Terrain). Answer: Prevents water runoff
on sloped terrain by delivering water directly to the plant roots at a
slow, steady rate.
◉ Tensiometer. Answer: Measures soil moisture tension, helping to
determine when irrigation is needed.
◉ Sprinkler Spacing. Answer: To ensure uniform water distribution.
, ◉ Drip Irrigation Component. Answer: Helps to filter debris and
prevent clogging in a drip irrigation system.
◉ Filter. Answer: Filters remove debris and contaminants from the
water supply, preventing clogs in drip emitters and tubing.
◉ Rotor head. Answer: Rotor heads deliver water in a rotating
stream, making them effective for covering large areas with uniform
watering.
◉ Lateral line. Answer: Lateral lines distribute water to sprinklers or
drip emitters within individual irrigation zones.
◉ Water hammer. Answer: Water hammer occurs when valves are
opened or closed too quickly, causing pressure surges.
◉ Check valve. Answer: Check valves prevent water from draining
out of the sprinkler head, avoiding puddling and erosion around the
sprinkler.
◉ Subsurface irrigation system. Answer: Subsurface irrigation
delivers water below the soil surface, reducing water loss due to
evaporation and runoff, especially in hot and windy conditions.
TEST PREP COMPLETE STUDY GUIDE 2026
◉ Backflow preventer. Answer: A device in an irrigation system that
prevents contaminated water from flowing back into the potable
water supply.
◉ Drip irrigation. Answer: An irrigation method that delivers water
directly to the roots of plants, minimizing evaporation and water
loss, making it highly efficient in arid climates.
◉ Solenoid valve. Answer: A device in an irrigation system that
opens and closes water flow electronically, controlled by the
irrigation controller.
◉ Precipitation rate. Answer: The speed at which water is applied to
an area in irrigation systems, indicating how much water is applied
over a given area in a specific period.
◉ Micro-sprinklers. Answer: Irrigation sprinklers that are ideal for
irregularly shaped landscapes, allowing targeted water application
with flexible coverage patterns.
,◉ Soil type. Answer: A critical factor when designing an irrigation
system, influencing water infiltration and retention.
◉ Rain sensor. Answer: It shuts off the system during rainfall.
◉ PVC (Polyvinyl Chloride). Answer: PVC is durable, lightweight, and
resistant to corrosion, making it the preferred material for
residential irrigation pipelines.
◉ Zone valve. Answer: To divide the system into manageable areas.
◉ Irrigation scheduling factors. Answer: Weather conditions and soil
moisture levels.
◉ Ideal water pressure for drip irrigation. Answer: 10-20 psi.
◉ Head-to-head coverage. Answer: Overlapping sprinkler coverage
for uniform watering.
◉ Drip emitter. Answer: To release water slowly to the base of
plants.
◉ Issue caused by overwatering. Answer: Increased pest activity.
,◉ Irrigation Controller. Answer: To program and automate watering
schedules.
◉ Clay Soil. Answer: Requires shorter, more frequent irrigation
cycles to prevent water runoff.
◉ Smart Irrigation System. Answer: Increased water efficiency and
conservation.
◉ Polyethylene Tubing. Answer: Flexibility and ease of installation.
◉ Flow Sensor. Answer: Volume of water passing through the
system.
◉ Drip Irrigation (Sloped Terrain). Answer: Prevents water runoff
on sloped terrain by delivering water directly to the plant roots at a
slow, steady rate.
◉ Tensiometer. Answer: Measures soil moisture tension, helping to
determine when irrigation is needed.
◉ Sprinkler Spacing. Answer: To ensure uniform water distribution.
, ◉ Drip Irrigation Component. Answer: Helps to filter debris and
prevent clogging in a drip irrigation system.
◉ Filter. Answer: Filters remove debris and contaminants from the
water supply, preventing clogs in drip emitters and tubing.
◉ Rotor head. Answer: Rotor heads deliver water in a rotating
stream, making them effective for covering large areas with uniform
watering.
◉ Lateral line. Answer: Lateral lines distribute water to sprinklers or
drip emitters within individual irrigation zones.
◉ Water hammer. Answer: Water hammer occurs when valves are
opened or closed too quickly, causing pressure surges.
◉ Check valve. Answer: Check valves prevent water from draining
out of the sprinkler head, avoiding puddling and erosion around the
sprinkler.
◉ Subsurface irrigation system. Answer: Subsurface irrigation
delivers water below the soil surface, reducing water loss due to
evaporation and runoff, especially in hot and windy conditions.
