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C-10 Landscape Trade > Chapter 6 > Flashcards

Chapter 6 Flashcards

1
Q

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

A

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

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2
Q

Wire may be laid in the same trench with pipes

A

And at the same depth

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3
Q

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

A

To eliminate the possibility of electrical shock

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4
Q

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

A

Green/Bare Copper

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5
Q

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

A

Need to wait until all construction traffic has ceased.

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6
Q

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 __________?

A

Quick-Coupling

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7
Q

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

A

Leaking occurs after continual use

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8
Q

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

A

Manufactures Specification

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9
Q

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

A

The number of heads in the zone

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10
Q

Low voltage landscape wiring is usually.

A

Flexible stranded wire, 2- #12 awg

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11
Q

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

A

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

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12
Q

Spray heads are _________ sprinklers?

A

Stationary

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13
Q

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

A

Water pressure

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14
Q

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

A

Rotary Heads

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15
Q

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

A

Thin Streams

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16
Q

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

A

Impact and gear drive heads

17
Q

___________ the placement of groundcover fills space most efficiently?

A

Alternating

18
Q

One benefit of mulching newly installed plants is _________________?

A

Prevents winter heaving of bulbs and ground covers

19
Q

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

A

Break through it and remove the impermeable layer

20
Q

What direction should you face cactus when planting?

A

North

21
Q

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

A

Catch and hold water

22
Q

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

A

Finish grading is begun

23
Q

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

A

Perennials

24
Q

Caliche soil would be described as _________?

A

Highly alkaline due to lime content

25
Q

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

A

Retainage

26
Q

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

A

Chinese jujube

27
Q

When is the best season to plant native desert plants?

A

Coolest

28
Q

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

A

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

29
Q

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

A

Discourages many of the insects and diseases.

30
Q

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

A

Grooving

31
Q

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

A

Permeability rate

32
Q

When connecting plastic pipe to metal pipe __________?

A

A plastic adapter with external threads should be used

33
Q

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

A

Friction and elevation

34
Q

Avoid placing pipe so as to cause ______________?

A

Cross-trenching

35
Q

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

A

A mainline

C-10 Landscape Trade (6 decks)

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