CPO Regulations and Compliance Test 2

Question 1

What is the maximum flow rate per sq. ft. for both pressure and vacuum type DE filters in public pools without slurry?

Accepted Answer

2 gpm

Answer

For both pressure and vacuum type Diatomaceous Earth (DE) filters in public pools without slurry, the maximum recommended flow rate is 2 gallons per minute (gpm) per square foot (sq. ft.). This specific flow rate ensures optimal filtration efficiency, allowing the DE media to effectively trap particulate matter without excessive pressure or premature clogging, maintaining clear water.

Question 2

What is used to radiate the high temperature of the water and cool it enough to allow the remainder of the circulation piping to the PVC?

Accepted Answer

Heat sink

Answer

A heat sink, or more accurately a heat exchanger in this context, is used to radiate the high temperature of the water and cool it enough to allow the remainder of the circulation piping to be PVC. In pool heating systems, it transfers heat from the primary heating circuit to the pool water, often using materials that can withstand high temperatures before the water enters standard PVC piping, which has a lower temperature tolerance.

Question 3

What is considered the necessary backwash rate to achieve proper agitation when backwashing sand filters?

Accepted Answer

15 gpm/sf

Answer

To achieve proper agitation and effectively clean the filter media when backwashing sand filters, a backwash rate of 15 gallons per minute per square foot (gpm/sf) is considered necessary. This flow rate is strong enough to lift and separate the sand bed, releasing trapped debris and ensuring thorough cleaning, which is vital for filter efficiency and water clarity.

Question 4

How many percent available chlorine by weight in Calcium hypochlorite?

Accepted Answer

65

Answer

Calcium hypochlorite (Cal Hypo) typically contains approximately 65% available chlorine by weight. This high concentration makes it an effective and widely used sanitizer for swimming pools, as it readily releases chlorine into the water to kill bacteria, viruses, and algae, maintaining hygienic conditions.

Question 5

According to the Certified Pool - Spa Operator Handbook, what is the ideal level for total water alkalinity?

Accepted Answer

80-120

Answer

According to the Certified Pool/Spa Operator Handbook, the ideal level for total water alkalinity is 80-120 parts per million (ppm). Maintaining alkalinity within this range is crucial for buffering the pH, preventing rapid pH fluctuations, and ensuring the stability and effectiveness of other pool chemicals, contributing to overall water balance.

Uncategorized Practice Test

Uncategorized Practice Test

CPO Regulations and Compliance Test 2