CAC Stream and Waterfall Construction 2

Question 1

What is the function of a weir box (spillway) at the top of an aquascape waterfall?

Accepted Answer

To create a uniform, consistent water sheet over the falls

Answer

To filter debris before water enters the stream

Answer

To aerate water before it reaches the pond

Answer

To measure total water volume in the system

Question 2

Which factor most directly determines the pump size needed for a waterfall and stream feature?

Accepted Answer

The width of the waterfall spillway and total head height

Answer

The color of liner used

Answer

The number of plants in the adjacent pond

Answer

The ambient temperature of the installation site

Question 3

What is the purpose of 'keying in' a waterfall boulder into the liner during stream construction?

Accepted Answer

To prevent the boulder from sliding downhill and to seal water against the rock face

Answer

To satisfy local building codes for structural stability

Answer

To provide a mounting point for underwater lighting

Answer

To anchor the liner to prevent floating

Question 4

In multi-tier waterfall construction, what is the preferred method to transition water between tiers to minimize splash loss?

Accepted Answer

Overlapping liner sections with a 12-inch plunge pool between tiers

Answer

Leaving gaps between tiers for natural waterfall effect

Answer

Using concrete channels between each tier

Answer

Installing micro-perforated pipe between tiers

Question 5

Which rock type is most commonly recommended for aquascape waterfall and stream construction due to its natural appearance and water-safe properties?

Accepted Answer

Fieldstone or granite boulders

Answer

Limestone

Answer

Sandstone

Answer

Quartzite

Question 6

When sizing a stream for a residential aquascape, what is the general rule for stream width relative to waterfall width?

Accepted Answer

The stream width should be similar to or slightly narrower than the waterfall

Answer

The stream should be twice as wide as the waterfall

Answer

The stream should always be at least 4 feet wide regardless of the waterfall

Answer

Stream width is irrelevant to waterfall width

Question 7

What is the primary reason gravel and cobble are placed on the stream bed liner after construction?

Accepted Answer

To promote beneficial bacteria colonization and improve aesthetics

Answer

To add structural support to the liner

Answer

To increase water flow speed

Answer

To prevent liner UV degradation