Water Supply and Irrigation Systems Flashcards
Quiz 4
Nozzle bodies for overhead boom systems can only attach one type of nozzle tip
T or F
False
Nozzles can be switched out for different functions
A drip irrigation system would be an appropriate choice for hanging baskets and NFT production systems
T or F
False
NFT require a constant flow
When checking the moisture content of a growing mix before use, a grower knows that the media is at the optimal moisture content when he is able to press water out mix using the “squeeze test”.
T or F
False
The soil should hold it’s shape but not have excess water squeeze out, if water is coming out then you need to add more dry growing media
A leak prevention device is used in an irrigation system to prevent leaks in the main irrigation line
T or F
False
A LPD monitors the flow rate, it also prevents a leak with a rubber seal
It is the impeller on a pump that spins to create the centrifugal force needed to draw water in from the inlet and force the water out on the outlet side.
T or F
True
Overhead irrigation systems make the most efficient use of water and nutrients.
T or F
False
If the plants are not perfectly aligned there will always be water that falls through
Most subsurface irrigation systems include some method to capture drainage water for treatment and recirculation
T or F
True
Why is it important to have a check valve on the inlet side of your nutrient dosing equipment?
to prevent backfeeding of the nutrient solution or chemical into your main water supply.
A centrifugal pump can be used to draw water from a source, but not to supply irrigation water to the crop.
T or F
False
Type of pump that uses an impeller, normally used for moving larger volumes of water from the water source and/or to the plants
Type of filters in an irrigation system can include
inline disc filters
nozzle screen filters
sand or charcoal system filters
manual cleaning filters
self cleaning filters
In a stationary overhead or drip irrigation system, it is important to maintain a minimum amount of pressure in the lines so that all the emitters work properly.
T or F
True
A capillary mat system is a great method of irrigation for small 4” pots and trays.
T or F
False
The minimum you would be able to do is 8”, the pots need to weigh enough so that the capillary mat actually works
When installing a travelling boom system, what is it important to consider?
Support systems for the boom, water lines, electrical cords
The type and flow rate of the nozzle tips being used
Drip irrigation systems apply water to the bottom of the substrate or container and rely on capillary action to moisten the substrate.
T or F
False
Uptake of soil not capillaries
What is a traditional flood floor?
A traditional flood floor is one that is shaped in a “V” and fills from the centre and drain back down to the centre.