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Landscape Irrigation Design Manual


Quiz Questions

1. Hydraulics is defined as the study of _____________ behavior, at rest and in motion.
Fluid
Solid
Gas
None of the above
2. Water is relatively:
Compressible
Incompressible
3. The formula for water pressure is force divided by:
Area
Volume
Weight
Distance
4. The force is created by the weight of the water _________ the point where it is being measured.
Below
Above
5. When the area is constant, then the force in pounds is dependent on the __________ of the water.
Weight
Volume
Height
none of the above
6. The word hydrostatic refers to the properties of water:
At rest
In motion
7. Dynamic water pressure or "working pressure" differs from static pressure because it __________ throughout the system due to friction losses, as well as elevation gains or losses.
Stays the same
Changes
8. Reference evapotranspiration is the ___________ average rate of water use for plants in a given climate.
Minimum
Maximum
9. Soil is made up of:
Sand
Silt
Clay particles
All of the above
10. Emitters should not be used in very course soils as water will percolate downward before it can spread far:
Vertically
Horizontally
11. Field capacity represents the boundary between water and capillary water. It is the ________ limit for soil moisture that is usable by plants.
Lower
Upper
12. Rolling terrain further complicates the problem of matching the application rate from the sprinklers with the intake rate of the soil. As the angle of slope increases, the intake rate _________ because of the higher potential for runoff.
Increases
Decreases
Does not change
None of the above
13. The pressure loss through the water meter should not exceed what percent of the minimum static water pressure available in the city main?
10%
35%
50%
75%
14. Of these three rules for calculating the flow for the irrigation system, we will choose the flow that is the most _________ to establish our system capacity.
Liberal
Restrictive
15. One of the most important rules in circuiting sprinklers is to avoid mixing _______ types of sprinklers together on the same valve whenever possible.
Different
Similar
16. Spray sprinklers are required for __________ landscaped areas.
Bigger
Smaller
17. ___________ operating pressures are common for rotating sprinklers compared to spray sprinklers.
Higher
Lower
18. The ________ radius sprinklers are usually more economical, and energy and water efficient for large-area irrigation, where their streams are uninterrupted and allowed full coverage.
Large
Small
19. The time period available for irrigation is called the:
Seepage limit
Water time
Hydraulic limit
Water window
20. The valve should either be the same size as the __________ pipe in the lateral it serves, or no more than one nominal size smaller than that pipe.
Smallest
Largest

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