The site selected for a water feature should be _______________________.
- under shade trees
- on a slope
- be located where it can be enjoyed from the house, patio or other vista
- near deciduous trees and shrubs
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| Answer: c |
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Pond water circulation rate should be once every one to two hours, less if
there is a filter device in use (once every four to six hours) for which of the following reason?
- It improves oxygen content of the water.
- It reduces water quality.
- It increases the collection of debris on the water surface.
- It keeps snail populations in check.
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| Answer: a |
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What are aquatic plants, which live completely in the water or are just barely emergent?
- marginal plants
- floating plants
- oxygenators
- sedges
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| Answer: c |
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When installing a pool liner be sure to _______________________________.
- expose portions of it to UV light
- remove any rocks, debris, or roots; smooth out lumps and holes by tamping in loose soil; and add a 2 inch layer of fine, damp sand over all surfaces
- put the liner in a chilled area to keep it from expanding
- place it a bit off-center
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| Answer: b |
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What is a small groove cut all the way across on the underside of the channel
which breaks the surface tension of water?
- a gunite
- a EPDM liner
- a canyon
- a reglet
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| Answer: d |
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Which is the best reason why larger bodies of water for pond construction are preferred?
a)Due to the cost of installation it is much more economical to make the pond larger.
b)Large bodies of water allow for water features such as fountains and waterfalls.
c)Larger fish and more types of fish can be raised in a large pond verses a small pond.
d)The health of the system is more easily accomplished with a larger body of water.
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| Answer: d |
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What is a disadvantage of most preformed pools in northern climates?
a)They are quite expensive and require contracting specialists.
b)They are pushed up from the ground due to frost heave.
c)They break down from UV radiation during the winter months.
d)They lack the depth needed for overwintering fish to survive.
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| Answer: d |
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Why is high-quality clay used in pond construction?
a)A 3 to 6 inch layer can be virtually waterproof.
b)High-quality clay absorbs toxins and pollutants.
c)High-quality clay supports a range of aquatic life.
d)It can be molded to form channels and waterfalls.
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| Answer: a |
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Why is water circulation in a pond important?
a)It causes the collection of debris on the water’s surface.
b)It helps regulate water temperature for aquatic life.
c)It improves the oxygen content of the pond water.
d)It keeps the water cleaner by reducing biological filtration.
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| Answer: c |
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What is essential for biological pond filters to remove organic wastes and chemicals from the water?
a)activated charcoal
b)bacteria
c)oxygenator plants
d)sponges
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| Answer: b |
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The formula to calculate the proper liner size is: Add twice the pool’s depth to its width, and add an extra 2 feet. Do the same for the length of the pool. What is the liner’s needed dimensions for a pool measuring 8 feet wide, 14 feet long, and 3 feet deep?
a)10 x 16
b)13 x 19
c)16 x 22
d)21 x 33
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| Answer: c |
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What can be done to avoid a discrepancy in the height of the pond’s rim?
a)Angle the sides at about 20 degrees.
b)Check to see that the rim is level.
c)Excavate an extra 2 inches deep.
d)Install edging after the construction.
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| Answer: b |
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Why is a ground fault circuit interrupter required for electrical work around ponds?
a)It automatically adjusts electrical power to what is needed.
b)It cuts a circuit if either moisture or a short is detected.
c)It improves the flow of electricity even in wet conditions.
d)It reduces the voltage to a level compatible with pumps.
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| Answer: b |
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Why is a hole for a pond made with a flexible liner excavated 2 inches deeper than the final pond depth?
a)to account for the settling of soil around the pond
b)to allow for the addition of a 2-inch layer of sand
c)to protect the liner from hidden rocks and roots
d)to remove folds by allowing the liner to stretch
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| Answer: b |
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Care must be taken in constructing waterfalls to _____.
a)avoid excessive loss of water
b)build the structure with gunite
c)cut grooves with the channel
d)install a deep catch basin
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| Answer: a |
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