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4th year cram cards > Chapter 19 Lawn Sprinkler Systems > Flashcards

Chapter 19 Lawn Sprinkler Systems Flashcards

1
Q

Connections to water Distribution system

Need this to connect to the potable water distribution system

A

Approved backflow preventer

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2
Q

1901

Electrical Specifications

At this length of roll, electrical wiring for sprinkler systems needs to go from a minimum 18 gauge UL approved underground feed multi strand to a 14 gauge UL approved underground feed wire.

A

500 feet

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3
Q

1902

Electrical specifications

Underground connections need to be made with

A

An approved waterproof connection

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4
Q

1902

Electrical Connections

At these voltages a blank must be called

A

12 and 24

Lawn sprinkler contractor

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5
Q

1902

Electrical specifications

All controllers with a _________ require hard wiring directly into circuit wiring installed by a _____. Also needs to have this installed at the controller.

A

Internal transformer
Liscensed electrician
Disconnect switch

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6
Q

1902

Electrical Specifications

All ___________ need to be installed in valve boxes

A

All underground electrical or hydraulic control valves

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7
Q

1902

Electrical Specifications

Exposed, above grade wires before entering a structure shall be encased in a __________

A

Approved electrical raceway

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8
Q

1902

Electrical specifications

When master valves are installed in a building

A

Shall be brass and operated by a 24 volt solenoid

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9
Q

1903

Minimum design standards

  1. Prevent ________
  2. System velocity not to exceed _________
  3. Static pressure not to exceed ________
A
  1. Overspray
  2. 5 feet per second
  3. 80 Paige
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10
Q

1903

Minimum design standards

Operating pressures fall between these ranges

Fixed heads______
Rotary heads_______

A

15-30 psi

40-70 psi

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11
Q

1903

Minimum design standards

Head spacing

  1. Areas greater than 10 ft _______ pattern and ____
  2. Areas less than 10 ft designed for _____. EXCEPTION
  3. Whenever possible ______
A
  1. Square or triangle and minimum head to head coverage
  2. Minimum head to head coverage
    EXCEPTION: drip emitters or. Bubblers
  3. Matched precipitation rates
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12
Q

1904

Materials and specifications

Pressure main lines shall be at least_______ and installed at a minimum depth of __________

A

160 psig polyvinyl chloride pipe

Eight inches

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13
Q

1904

Materials and specifications

Lateral lines and control valves shall be at least___________ or ____________ and installed at a depth of ___________

A
  1. 80 Psig polyethylene pipe
  2. Polyvinyl chloride pipe
  3. 8 inches
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14
Q

1904

Material specifications

All polyvinyl chloride pipe shall be _________ or __________

A
  1. Ring tight

2. Solvent welded

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15
Q

1904

Material specifications

All polyethylene pipe shall be installed with __________ using __________ made of ________ and clamped over the ___________.

A
  1. Polyvinyl chloride insert fittings
  2. Pinch
  3. Screw clamps
  4. Barbed portion
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16
Q

1904

Materials and specifications

All PVC larger than ______ shall be ______ with _______

A
  1. One inch
  2. Double clamped
  3. One clamp directly over the barbs and one clamp behind the barbs
17
Q

1904

Materials and specifications

Saddles may be used if:
1.
2. Saddle is part is made of ____ or ____ with ___ or ______

A
  1. Gasket is part of the saddle
                         And
  2. Brass or plastic material, stainless steel or brass screws
18
Q

1904

Materials and specifications

Underground control valves to be manufactured of ________

A
  1. A non-corrosive material
19
Q

1904

Materials and specifications

All underground lawn sprinkler heads shall be setback at least_______ from the ________ or _______ of any _____ or _______

A
  1. 2 feet
  2. Curb or road surface
  3. Public street
  4. Right-of-way
20
Q

1905

Valves and controls

All single-family lawn sprinkler systems and all other systems of ______ with a ____ may be equipped with _______

A
  1. 50 heads or less
  2. 1 inch or smaller
  3. Pressure Vacuum Breaker
21
Q

1905

Valves and controls

All single-family lean sprinkler systems and all other systems of _______ with a _____ may be equipped with a _______

A
  1. 50 heads or less
  2. 1 inch or smaller tap
  3. Pressure vacuum breaker
22
Q

1905

Valves and controls

All other instillations shall require a ______

A
  1. Reduced principle backflow preventer assembly
23
Q

1905

Valves and controls

All PVBs shall be installed________

A
  1. Outside of the building
24
Q

1905

Valves and controls

A reduced pressure backflow preventer assembly can be installed inside a building if

A
  1. Approved drainage is provided
25
Q

1905

Valves and controls

  • Copper pipe shall be run froM the ______ to approximately _______. If the backflow assembly is _______ the copper pipe shalll _____ to the building at least _____ from the building.
  • ________ shall not be allowed on pressurized main line.
A
  1. Discharge side of the backflow preventer
  2. 8 inches below grade.
  3. Within 3 feet of the building foundation
  4. Continue perpendicular
  5. At least 3 feet
  6. Atmospheric Vacuum Breakers
26
Q

49-1905

Valves and controls

Any sprinkler system that has a _______ attached you it must have a ______ installed according to the code.

A
  1. Chemical or fertilizer injection system

2. Reduced pressure principle backflow assembly

4th year cram cards (2 decks)

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