Supervisor 1 - Pool Operations

Question 1

Of the following, the BEST method for controlling algae growth in an outdoor swimming pools is to:

Answer 1

Apply standard rates of copper sulphate

Question 2

To improve the capabilities of swimming pool filters, a jelly like substance called a “flock” must be deposited on the surface of the filter bed. The flock is formed by adding which of the following two chemicals to the water in the treatment tank?

Answer 2

Aluminum sulphate and sodium carbonate

Question 3

Pool water returning from the center drain of an outdoor swimming pool is called the

Answer 3

Effluent

Question 4

Backwashing in a conventional water treatment plant is USUALLY performed by the plant operator when the loss of head reaches _____ pounds per square inch

Answer 4

5 1/2 - 7 lbs per square inch

Question 5

Most outdoor swimming pool operations have large heating boilers. The spoilers have water comes with a look through water gauge is showing the water level in the boiler. Manual maintenance and operation of heating plants and auxiliary equipment specifies that, while the boilers in operation, the water column engage glass should be blown down

Answer 5

Daily

Question 6

Chlorine residual in municipal operated pools as required by department of health shall be kept at not less than ________ ppm (pounds per million)

Answer 6

1.0 ppm

Question 7

The filtration rate per square foot for a conventional filter is ________ Gallons per square foot.

Answer 7

3 gallons per sq ft

Question 8

Chlorine gas in steel cylinders is used as a sterilant in most outdoor swimming pools. If chlorine gas leaks occur from faulty connections, valve packing, etc., the standard procedure for locating the leaks promptly is to use

Answer 8

Concentrated ammonia

Question 9

What is the appropriate minimum for pH levels in a municipal pool?

Answer 9

Maintain the pH level of the water at 7.2–7.8.

Question 10

How often should a pools pH level be tested at minimum?

Answer 10

2 times a day, but hourly during heavy use

Question 11

What is the “turnover rate” for the water in the pool to be recirculated?

Answer 11

The entire pool volume should be recirculated every 6 hours, but pools built before 1976 may have an 8 hour turnover rate.

Question 12

What type of filtration system should a pool have?

Answer 12

Sand filters, Diatomaceous earth filters, Cartridge filters, or Flow measurement

Question 13

Sand filters

Answer 13

i) Gravity and pressure-type sand filters shall be operated at a filter rate not to exceed three gallons per minute per square foot (gpm/sf). High-rate sand filters (pressure or vacuum) can be operated at a filter rate up to 15 gpm/sf.
(ii) Filter air release valves shall be opened daily, or more frequently if necessary to remove air which collects in the filters.
(iii) Sand filters shall be backwashed at a flow rate of 12 to 15 gpm/sf or at the design rate recommended by the manufacturer.

Question 14

Diatomaceous earth filters

Answer 14

shall be properly maintained and operated according to the manufacturer’s instructions and at a filter rate not to exceed two gpm/sf with body feed or 1.5 gpm/sf without body feed.

(ii) Diatomaceous earth filter backwash water must discharge to the sewer system through a separation tank. The separation tank sludge shall be disposed of or treated as a solid waste material in accordance with local and State laws, rules and regulations.

Question 15

Cartridge filters.

Answer 15

Cartridge filters shall be operated at a filter rate not to exceed the design rate or a maximum of 0.375 gpm/sf.

(ii) Cleaning of cartridge filters must be in accordance with the manufacturer’s recommendations. One complete spare set of cartridges shall be available at all times to facilitate cleaning.

Question 16

Flow measurement

Answer 16

All flow meters shall be maintained in accordance with provisions in section 6-1.29, item 9.8, of this Subpart.