TEXAS IRRIGATION STUDY EXAM FULL
QUESTIONS AND ANSWERS 2026 GRADED A+
◉ What are some examples of back flow prevention methods?
Answer: 1. an air gap
2. an atmospheric vacuum breaker (AVB)
3. a pressure vacuum breaker (PVB)
4. spill-resistant pressure vacuum breaker (SRPVB)
5. a double check valve assembly (DCVA)
6. a reduced pressure principle assembly (RPPA)
◉ Type of rotary sprinkler in which rotation is achieved by a steel
ball which is set into a circular motion by water passing through the
head. Answer: Ball Driven Head
◉ A section of sprinklers controlled by one zone valve. Answer:
Block (of heads)
◉ The exterior case or shell of the sprinkler. Answer: Body (of
heads)
◉ A pump which is installed in the water supply line and is designed
to raise the pressure in the irrigation system. Answer: Booster Pump
,◉ A type of sprinkler head designed to irrigate level and defined
shrub beds. It is mounted on a riser and puts out a very small
umbrella-shaped adjustable flow of water. Answer: Bubblers
◉ The pipe fitting used to change an irrigation component to a
larger or smaller size. Answer: Bushing
◉ The main effect distributing water horizontally through the soil.
Answer: Capillary Action
◉ Containers that are used to collect measurable water in order to
conduct a water audit. Answer: Catchment Devices
◉ Rating of the smoothness of the inside of pipe. The higher the ----,
the smoother the inside diameter of the pipe. PVC has a ---- of 150,
whereas copper is 140. Generally, the ---- decreases over time
indicating the pipe gets rougher, resulting in increased friction loss.
Answer: C-Factor
◉ A valve which permits water to flow in one direction only. Answer:
Check Valve
◉ These devices are usually located within the sprinkler head for
the purpose of preventing water in the piping to drain out of the
,sprinkler heads when the system is shut off. Therefore, this type of
anti-drain check valve becomes an individual tool for managing
water when dealing with sloped landscapes. Answer: Check valve for
"low head drainage"
◉ A method by which PVC pipe is grouped according to the working
pressure. Pressure rated with a wall thickness in direct ratio to the
diameter. All sizes in that class have the same working pressure.
Answer: Class Pipe
◉ A line of equal elevation drawn on a plan. For example, a ---
labeled "250" means that everywhere along that line is 250 feet
above mean sea level. ---- are usually accurate to +/- one-half of the
contour interval; ie. when a contour interval of one-foot is indicated
on a plan, a particular ---- will be accurate to +/- 6 inches. Answer:
Contour line
◉ The wires (from the automatic controller) which transit signals to
the automatic electrical valves to open and close. Answer: Control
Wires
◉ An automatic timing device, which signals the automatic valves to
open or close according to the prescribed program. Because of
current technological advances, --- have expanded from very simple
mechanical devices to very sophisticated central control units that
operate numerous satellite units in the field. Wireless automatic
systems are emerging and PC irrigation --- interface hardware and
, software solutions are becoming the standard for city parks, golf,
and commercial sites.. Answer: Controller
◉ A bronze tube with a handle which inserts into a quick coupler
valve (and turned one quarter revolution) for supplemental water.
May be fitted with a sprinkler head, hose swivel or faucet. Answer:
Coupler Key
◉ The pattern of water that a certain sprinkler covers. Various
sprinklers or sprinkler nozzles have varying patterns of coverage:
quarter, half, full, etc. Most manufactures even have adjustable arc
nozzles that suffice for many odd-shaped areas. Answer: Coverage
◉ Any actual or potential connection between a potable water
supply and any source of contamination or pollution. Answer: Cross
Connection
◉ Refers to one complete operation of the controller through a
watering program. Answer: Cycle
◉ Coefficient used to adjust the potential (or reference)
evapotranspiration to reflect the usage of water in relation to the
density of the planting. Answer: Density Factor
QUESTIONS AND ANSWERS 2026 GRADED A+
◉ What are some examples of back flow prevention methods?
Answer: 1. an air gap
2. an atmospheric vacuum breaker (AVB)
3. a pressure vacuum breaker (PVB)
4. spill-resistant pressure vacuum breaker (SRPVB)
5. a double check valve assembly (DCVA)
6. a reduced pressure principle assembly (RPPA)
◉ Type of rotary sprinkler in which rotation is achieved by a steel
ball which is set into a circular motion by water passing through the
head. Answer: Ball Driven Head
◉ A section of sprinklers controlled by one zone valve. Answer:
Block (of heads)
◉ The exterior case or shell of the sprinkler. Answer: Body (of
heads)
◉ A pump which is installed in the water supply line and is designed
to raise the pressure in the irrigation system. Answer: Booster Pump
,◉ A type of sprinkler head designed to irrigate level and defined
shrub beds. It is mounted on a riser and puts out a very small
umbrella-shaped adjustable flow of water. Answer: Bubblers
◉ The pipe fitting used to change an irrigation component to a
larger or smaller size. Answer: Bushing
◉ The main effect distributing water horizontally through the soil.
Answer: Capillary Action
◉ Containers that are used to collect measurable water in order to
conduct a water audit. Answer: Catchment Devices
◉ Rating of the smoothness of the inside of pipe. The higher the ----,
the smoother the inside diameter of the pipe. PVC has a ---- of 150,
whereas copper is 140. Generally, the ---- decreases over time
indicating the pipe gets rougher, resulting in increased friction loss.
Answer: C-Factor
◉ A valve which permits water to flow in one direction only. Answer:
Check Valve
◉ These devices are usually located within the sprinkler head for
the purpose of preventing water in the piping to drain out of the
,sprinkler heads when the system is shut off. Therefore, this type of
anti-drain check valve becomes an individual tool for managing
water when dealing with sloped landscapes. Answer: Check valve for
"low head drainage"
◉ A method by which PVC pipe is grouped according to the working
pressure. Pressure rated with a wall thickness in direct ratio to the
diameter. All sizes in that class have the same working pressure.
Answer: Class Pipe
◉ A line of equal elevation drawn on a plan. For example, a ---
labeled "250" means that everywhere along that line is 250 feet
above mean sea level. ---- are usually accurate to +/- one-half of the
contour interval; ie. when a contour interval of one-foot is indicated
on a plan, a particular ---- will be accurate to +/- 6 inches. Answer:
Contour line
◉ The wires (from the automatic controller) which transit signals to
the automatic electrical valves to open and close. Answer: Control
Wires
◉ An automatic timing device, which signals the automatic valves to
open or close according to the prescribed program. Because of
current technological advances, --- have expanded from very simple
mechanical devices to very sophisticated central control units that
operate numerous satellite units in the field. Wireless automatic
systems are emerging and PC irrigation --- interface hardware and
, software solutions are becoming the standard for city parks, golf,
and commercial sites.. Answer: Controller
◉ A bronze tube with a handle which inserts into a quick coupler
valve (and turned one quarter revolution) for supplemental water.
May be fitted with a sprinkler head, hose swivel or faucet. Answer:
Coupler Key
◉ The pattern of water that a certain sprinkler covers. Various
sprinklers or sprinkler nozzles have varying patterns of coverage:
quarter, half, full, etc. Most manufactures even have adjustable arc
nozzles that suffice for many odd-shaped areas. Answer: Coverage
◉ Any actual or potential connection between a potable water
supply and any source of contamination or pollution. Answer: Cross
Connection
◉ Refers to one complete operation of the controller through a
watering program. Answer: Cycle
◉ Coefficient used to adjust the potential (or reference)
evapotranspiration to reflect the usage of water in relation to the
density of the planting. Answer: Density Factor
