CAMT Pool and Spa Maintenance 3

Question 1

What should be added to pool water when calcium hardness is too low (below 150 ppm)?

Accepted Answer

Calcium chloride

Answer

Calcium chloride is added to pool water to raise calcium hardness and prevent the water from becoming corrosive to pool surfaces and equipment.

Question 2

What is 'shocking' a pool?

Accepted Answer

Adding a large dose of oxidizer or chlorine to break down combined chlorine and contaminants

Answer

Shocking involves adding a high concentration of chlorine or non-chlorine oxidizer to destroy combined chlorine, algae, and organic contaminants.

Question 3

At what approximate water temperature does algae growth in pools become significantly more likely?

Accepted Answer

Above 60°F (15.5°C)

Answer

Algae growth accelerates significantly above 60°F and becomes aggressive above 80°F, requiring more diligent chlorination in warm conditions.

Question 4

What does 'combined chlorine' (chloramines) refer to in pool water testing?

Accepted Answer

Chlorine that has bonded with nitrogen waste compounds and is no longer effective as a sanitizer

Answer

Combined chlorine consists of chloramines formed when free chlorine reacts with ammonia and nitrogen compounds, causing eye irritation and the 'pool smell' while providing little sanitizing benefit.

Question 5

What is the purpose of a pool Safety Vacuum Release System (SVRS)?

Accepted Answer

To prevent drain entrapment by releasing suction when a blockage is detected

Answer

An SVRS automatically shuts off or reverses pump suction when a drain blockage is detected, preventing dangerous suction entrapment injuries.

CAMT - Certified Apartment Maintenance Technician Practice Test

CAMT - Certified Apartment Maintenance Technician Practice Test

CAMT Pool and Spa Maintenance 3