CAC Stream and Waterfall Construction 3

Question 1

Which tool is most commonly used on a job site to level the top edge of a stream berm before liner installation?

Accepted Answer

Rotary laser level

Answer

A rotary laser level allows installers to quickly establish a consistent grade around the entire stream perimeter, ensuring the berm is level to prevent liner overflow.

Question 2

How does installing a check valve on the pump discharge line benefit a stream and waterfall system?

Accepted Answer

It prevents backflow from draining the feature when the pump shuts off

Answer

A check valve closes when the pump stops, preventing water from siphoning back through the pump and draining the stream or waterfall basin.

Question 3

What is a 'disappearing stream' in aquascape terminology?

Accepted Answer

A stream feature where water flows into a hidden below-grade basin rather than a visible pond

Answer

A disappearing stream is designed so the water collects in a gravel-filled underground basin at the stream's end, creating the illusion that the stream vanishes.

Question 4

During stream construction on a slope with unstable soil, which technique prevents the liner from shifting downhill over time?

Accepted Answer

Using a soil anchor trench at the stream header and along the berm edges

Answer

Burying the liner in anchor trenches at the header and berm edges locks it in place and prevents gravity from pulling the liner downhill as soil settles.

Question 5

What is the recommended practice when two sections of EPDM liner must be seam-bonded together in a stream?

Accepted Answer

Clean, prime, and bond with EPDM splice tape and seam primer per manufacturer specs

Answer

A proper EPDM seam requires cleaning, applying seam primer, and bonding with EPDM-specific splice tape to ensure a watertight, long-lasting connection.

(CAC) Certified Aquascape Contractor Practice Test

(CAC) Certified Aquascape Contractor Practice Test

CAC Stream and Waterfall Construction 3