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LHAP 3rd > Water & Light > Flashcards

Water & Light Flashcards

1
Q

what is toxic to fish that small water features accumulate more of?

A

carbon dioxide

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2
Q

what factors should be looked into when designing residential water features?

A

desired sound levels, local regulations, access to power

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3
Q

which flexible pond liner has the longest life span on the prairies?

A

EPDM

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4
Q

why would you choose to install a floating heater in a water feature?

A

to help fish overwinter, by allowing CO2 to be released

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5
Q

what can you finish the edge of a water feature with?

A

pebbles, indigenous rock, complementary plant material

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6
Q

how many direct hours of direct sunlight do hardy water lilies require?

A

5 -6 hours

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7
Q

one of the steps in balancing the ecosystem in water features is?

A

add oxygenating plants to the pond

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8
Q

which pond liner is susceptible to punctures and deterioration from UV rays

A

polyethylene

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9
Q

to help keep water features in balance, what % of the surface should be covered?

A

50 - 75%

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10
Q

how any days should chlorinated water sit before adding in fish and plants?

A

2 days

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11
Q

if a single lamp fails during a low voltage system test, what should be done first?

A

test the failed lamp

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12
Q

typical function of a bollard fixture?

A

lighting walkways or driveways

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13
Q

which type of lighting highlights the texture of a fence?

A

accent lighting

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14
Q

what is a GFI - ground fault indicator

A

Provide protection against electrical shock. Shut off power if a bare wire touches a ground object. Monitors the flow of electrical current in the circuit

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15
Q

when laying out a lighting system, where should the transformer be located?

A

in the centre of the design

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16
Q

how do you reduce voltage drop in a lighting install?

A

change from a 12 - 2 cable to a 10 - 2 cable

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17
Q

how do you go about installing the low voltage cable for a light system?

A

Start at the transformer and work out to the last fixture. Lay cable on soil surface. Bury the cable 10 - 15cm

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18
Q

some standard maintenance actions for low voltage system would be?

A

remove dust, run adjacent plant material, spray silicone lubricant in light sockets

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19
Q

what stage should maintenance for a low voltage light system begin?

A

at the design phase

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20
Q

T/F water is the most versatile and adaptable element you can introduce to a landscape?

A

true

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21
Q

T/F water features must be constructed in full sun and receive 6 hours direct sunlight?

A

false

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22
Q

T/F all features must have a large open body of water as part of design and construction?

A

false

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23
Q

T/F water feature can be designed either formal or informal?

A

true

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24
Q

T/F water features not need to match the scale of the property, existing landscape and buildings?

A

false

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25
Q

T/F in some municipalities a permit may be required to install water features?

A

true

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26
Q

T/F in some cases, small water features are ideal because they require less maintenance than large ones?

A

false

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27
Q

T/F protecting property is a major reason for installing night lighting?

A

true

28
Q

T/F night scape lighting should look as natural as possible?

A

true

29
Q

T/F lighting looks best when the source is hidden?

A

true

30
Q

T/F downlighting is used to focus on a specific plant or area in the landscape?

A

false

31
Q

T/F contour lighting is a form of downlighting mainly used for safety?

A

true

32
Q

T/F shadow lighting is similar to silhouette lighting except the light source is placed behind the object?

A

false

33
Q

T/F perspective lighting is often used to make a garden space seem smaller than it is?

A

false

34
Q

T/F preformed or molded liners are manufactured from polyethylene or fibreglass?

A

true

35
Q

T/F concrete is an ideal choice for pond construction on the prairies?

A

false

36
Q

T/F a bubbling rock install is a fast and easy feature to install?

A

true

37
Q

T/F some water pumps can be left in the water without harming the pump?

A

true, newer pumps can be frozen

38
Q

how would you describe a puddled earth pond?

A

built on clay subsoil sites, good for large scale installs, requires steady water

39
Q

what pond liner can be welded into a variety of shapes?

A

butyl rubber

40
Q

a valuable characteristic of EPDM?

A

remains flexible at extremely cold temps

41
Q

when choosing a pump what should you look for?

A

a pump that can move a minimum of 2 times the volume of water/hour

42
Q

lifespan pf an LED bulb?

A

50k hours

43
Q

lifespan of a halogen bulb?

A

3k hours

44
Q

lifespan of incandescent bulb?

A

1200 hours

45
Q

incandescent bulbs converts most of the energy it produces into heat, what % is that?

A

90%

46
Q

a GFI will shut off power in the event of a short in?

A

1/40th of a second

47
Q

voltage drop formula

A

watts x length of cable / cable size constant

48
Q

how wide and deep should marginal shelves be?

A

30cm x 30cm

49
Q

hole for a preformed pond should be how much wider than the pond itself?

A

8cm

50
Q

the walls of a water feature should have an angle of?

A

30 degrees

51
Q

the ratio of height to length for a water feature is?

A

1 : 3

52
Q

how do you tune a waterfall?

A

add smoother rocks, modify angle of water or add an echo chamber

53
Q

what soil is needed for bog plants to survive?

A

1 : 1 mix of loam and organic matter

54
Q

formula for volume?

A

length x width x depth

55
Q

constant to convert to imperial gallons?

A

6.25

56
Q

constant to convert to US gallons?

A

7.5

57
Q

Y/N the cable for low voltage lighting needs to be protected in conduit?

A

no

58
Q

Y/N wire connectors must be CSA approved for outdoor use?

A

yes

59
Q

Y/N 30 - 45cm of wire should be coiled and left at each fixture and transformer?

A

yes

60
Q

Y/N do transformers need to be connected to a socket with a GFI?

A

yes

61
Q

what % of water needs to be replaced at one time?

A

10%

62
Q

what’s the typical amount of evaporation from a feature?

A

3 - 5cm

63
Q

how long do water lily blooms last?

A

3 days

64
Q

why do you add native water to a pond as part of the balancing process?

A

to inoculate the pond with natural beneficial bacteria and other aquatic life

65
Q

Y/N does lighting cable need to be replaced every 3 - 5 years?

A

no

66
Q

what lighting systems are resistant to road salt damage?

A

bronze, copper and cast aluminium

LHAP 3rd (8 decks)

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