Review Questions for Final

Review Questions for Final These start where the components review ended Micro- Systems What is the most efficient irrigation system? A micro system should include 2 extra components ( what are they?) When is drip tubing used instead of micro spray heads or emitters? Pumps What pump needs to be primed? What type of pump is most efficient? What type of pump is often used in shallow water? What type of pump is installed in a wet well because the line shaft has to be vertical? What type of pump has the motor underwater? What type of pump will you most often see? What is a VFD used for? Design Which of the following has to be included in the irrigation site plan? Plot plan, landscape plan, lighting plan, grading plan or elevations, soil type, microenvironments, style and color of house, water source, power source. What 2 pieces of information do you have to gather at the source? After site evaluation and client interview, what is the first step in designing an irrigation system? What is the ideal way to layout sprinklers in an irrigation design? How do you determine how many sprinklers per zone? What must all the sprinklers in one zone have in common? What determines a hydrozone? What 2 factors are needed to size a pipe? What is the recommended maximum velocity for water in a pipe? Why is friction loss calculated at the design stage? What does a full circle on a design indicate? What about an hour glass symbol? Installation What is a valve box used for? When should a valve box be used? What type of material goes under a valve box? Where is the valve box usually located? What is the advantage of using dura fittings? How deep is the trench in an irrigation install? What type of machinery is least damaging to the existing landscape? What type of pipe is most commonly used in residential systems? What type of fitting is commonly used on PE pipe? What is the difference between ¾” PE 75psi and ¾” 100 psi pipe? In a turf zone what is used between the sprinkler head and the pipe? When should teflon tape be used? What is the purpose of the swing joint? What is done to the sprinkler before the nozzles are installed? When would you use a sprinkler with a check valve? What gauge of wire is used in residential/ light commercial systems? Should microsprays be in the same zone as turf sprinklers? Troubleshooting and Maintenance What is part of spring startup?Adjust sprinklers, do an audit, pressure check BFPD, plug in controller, blow out excess water, Change out broken sprinklers, connect valve wires, change battery in controller. What would indicate a pipe was broken? What causes a pipe to break? What are the 3 groups of problems that can occur in an irrigation system? When dealing with electrical problems? What 3 areas should be checked? When checking the controller where should you set your voltmeter? When checking a solenoid where should you set your voltmeter? What is a good reading on a solenoid? What voltage does a controller run off? Transforms from what to what? When blowing out a residential system with a source psi of 50 what should the compressor be set at? Soil Plant water Relations What is infiltration? Percolation? Does water percolate more vertically in a sand or a clay soil? In a clay soil would you choose a drip system with emitters closer together or further apart compared to a sand soil? What is ET?What is used to determine reference ET? How would you determine Landscape ET? Where is water available to the plant? Between what storage terms? How is available water lost in the soil? What factor determines available water in the soil? What is Plant Available water? What is MAD? What is the default % for MAD? How do you determine when to water? How do you determine how long to set your controller in any single day? Auditing What is the purpose of an audit? What must be done before an audit can be performed? How are the catch cans placed? How long would you run an audit of spray heads? How do you calculate distribution uniformity? What is considered in scheduling the run time on a controller? Water Conservation Why is water conservation important in irrigation? What ways are the industry working to conserve water? What ways are the designers, contractors working to conserve water?