Chapter 6

Question 1

The correct definition of the term “in Rush current” is

Answer 1

The additional current required to actuate a valve solenoid when water pressure is increased.

Question 2

Wire may be laid in the same trench with pipes

Answer 2

And at the same depth

Question 3

The primary purpose of having a grounding conductor connected to electrical irrigation controllers is?

Answer 3

To eliminate the possibility of electrical shock

Question 4

The color code of the equipment grounding wire (conductor) in a residence is _______ or _______?

Answer 4

Green/Bare Copper

Question 5

What exception to this timing occurs when asphalt roadways are left unsurfaced or surface only with a base line?

Answer 5

Need to wait until all construction traffic has ceased.

Question 6

The three basic types of sprinkler systems are the spray, rotary and quick-coupling systems. The sprinkler systems that operates by hand labor only and not automatic timers, control valves, etc is the __________?

Answer 6

Quick-Coupling

Question 7

Gate valves should never be used for zone operating valves because?

Answer 7

Leaking occurs after continual use

Question 8

What is the limiting factor on the number of remote sprinkler control values which can operate simultaneously from a single controller?

Answer 8

Manufactures Specification

Question 9

In wiring an electrical solenoid valve, which of the following is not a factor in its operation?

Answer 9

The number of heads in the zone

Question 10

Low voltage landscape wiring is usually.

Answer 10

Flexible stranded wire, 2- #12 awg

Question 11

If corrosion in the neutral wire of a remote control valve (RCV) control circuit creates an open circuit __________?

Answer 11

All valves on the side of the break away from the controller will be made inoperative.

Question 12

Spray heads are _________ sprinklers?

Answer 12

Stationary

Question 13

Spray heads are popped out of the ground by _________ and spray water in the pattern you select?

Answer 13

Water pressure

Question 14

____________ move water in a circular manner and throw water longer distances?

Answer 14

Rotary Heads

Question 15

Rotary heads take and concentrate water into ________ that propel over long distances?

Answer 15

Thin Streams

Question 16

The two basic types of rotary heads most often used today are______?

Answer 16

Impact and gear drive heads

Question 17

___________ the placement of groundcover fills space most efficiently?

Answer 17

Alternating

Question 18

One benefit of mulching newly installed plants is _________________?

Answer 18

Prevents winter heaving of bulbs and ground covers

Question 19

The only way to improve the drainage of caliche soil is to _______________?

Answer 19

Break through it and remove the impermeable layer

Question 20

What direction should you face cactus when planting?

Answer 20

North

Question 21

After the soil has been backfilled, a mounded ring of compacted soil should be formed around the edge of the hole to ___________?

Answer 21

Catch and hold water

Question 22

Footing for freestanding walls should be installed when other footings are placed and masonry work completed before?

Answer 22

Finish grading is begun

Question 23

Plants that live at least 3 to 4 years are _________?

Answer 23

Perennials

Question 24

Caliche soil would be described as _________?

Answer 24

Highly alkaline due to lime content

Question 25

What is it called when a method is applied to trap and hold any applied water, preventing loss through run-off?

Answer 25

Retainage

Question 26

What is a tree 15-30 feet high with yellow blooms, low water tolerance and high tolerance to salt in the ground?

Answer 26

Chinese jujube

Question 27

When is the best season to plant native desert plants?

Answer 27

Coolest

Question 28

When transplanting a bareroot desert cactus plant, which of the following statements is incorrect?

Answer 28

Allow the roots remain in as much original soil as possible and water immediately after planting

Question 29

Desert landscapes are easier to maintain than tropical or temperatures landscapes because the dry climate _________?

Answer 29

Discourages many of the insects and diseases.

Question 30

When pulling PVC pipe through rocky ground during installation, the pipe may be damaged by __________?

Answer 30

Grooving

Question 31

________________ is how fast our soil is able to absorb water in inches of water per hour?

Answer 31

Permeability rate

Question 32

When connecting plastic pipe to metal pipe __________?

Answer 32

A plastic adapter with external threads should be used

Question 33

The two most important factor influencing water pressure at the supply side are _________?

Answer 33

Friction and elevation

Question 34

Avoid placing pipe so as to cause ______________?

Answer 34

Cross-trenching

Question 35

Placing parallel in the same trench works well where you can place __________?

Answer 35

A mainline