Print Options

Card layout: ?

← Back to notecard set|Easy Notecards home page

Instructions for Side by Side Printing
  1. Print the notecards
  2. Fold each page in half along the solid vertical line
  3. Cut out the notecards by cutting along each horizontal dotted line
  4. Optional: Glue, tape or staple the ends of each notecard together
  1. Verify Front of pages is selected for Viewing and print the front of the notecards
  2. Select Back of pages for Viewing and print the back of the notecards
    NOTE: Since the back of the pages are printed in reverse order (last page is printed first), keep the pages in the same order as they were after Step 1. Also, be sure to feed the pages in the same direction as you did in Step 1.
  3. Cut out the notecards by cutting along each horizontal and vertical dotted line
To print: Ctrl+PPrint as a list

43 notecards = 11 pages (4 cards per page)

Viewing:

B Exam: Filtration

front 1

The release of dissolved air in saturated cold water due to a decrease in pressure causes which of the following?

back 1

Air Binding

front 2

The color in filtered water is called?

back 2

True Color

front 3

What is the final step for removal of suspended solids?

back 3

Filtration

front 4

Which FAC Chapter addresses drinking water standards, monitoring, and reporting?

back 4

FAC 62-550

front 5

Inaccurate test results are generally due to?

back 5

Poor sampling techniques

front 6

What is the highest possible turbidity reduction expected when operating a filtration process under optimum conditions?

back 6

99.5%

front 7

How is pin point floc removed?

back 7

Filtration

front 8

Direct filtration omits which process?

back 8

Sedimentation

front 9

What are the main removal mechanisms in a filter?

back 9

Adsorption and sedimentation

front 10

Sand drying beds are similar to what type of filters?

back 10

Gravity Sand Filters

front 11

Which of the following coagulants is generally used as a filter aid?

back 11

Nonionic Polymer

front 12

What parameters are used to determine when to backwash a filter?

back 12

Head Loss, Turbidity, and Time

front 13

Where is the application point for a filter aid?

back 13

Filter Influent

front 14

Before starting the backwash process, what must you check first?

back 14

Water supply

front 15

Mudballs are caused by which of the following?

back 15

Improper backwash

front 16

How is the problem in question 15 corrected?

back 16

Properly backwash the filter

front 17

During a plant walk through, an operator discovers a filter is air bound. What action should she take?

back 17

Backwash the filter immediately

front 18

Media boils are caused by?

back 18

High backwash rates

front 19

What is the main goal of filtration?

back 19

Removal of turbidity

front 20

What is the 4th step in the backwash process?

back 20

Start the surface scours

front 21

How should an air bound filter be backwashed?

back 21

Slowly

front 22

The color in unfiltered water is called?

back 22

Apparent Color

front 23

After backwashing a filter, there is a high initial head loss. What is most likely cause?

back 23

Insufficient Backwash

front 24

What causes air binding?

back 24

Ans. Operating the filter at high head loss too long
Ans. The release of O2 in saturated cold water due to a decrease in pressure

front 25

During a plant tour, an operator noticed that Filter 16 has a sudden increase in head loss. What action should she take?

back 25

Do a jar test

front 26

What do you call the process of reversing the flow of water through filter media to remove trapped particles?

back 26

Filter Backwash

front 27

The common boundary layer between two substyances such as water and a solid is called?

back 27

Interface

front 28

The difference between the water surface and the media surface is called?

back 28

Submergence (Head)

front 29

What is the filter rate in GPM/sq ft of slow sand filters?

back 29

0.015-0.15 GPM/sq ft

front 30

High water temperatures require what type of backwash rates?

back 30

Higher Backwash rates

front 31

The Filter Backwash Rule requires the backwash water to be sent where after dewatering the sludge?

back 31

Upstream of all conventional or direct filtration systems (includes coagulation, filtration, and sedimentation)

front 32

What is the ripening period of a filter?

back 32

This occurs at startup of a new filter or after backwash of a filter

front 33

A filter 12' long and 8' wide drops 3" in 90 seconds. What is the filtration rate in GPM/sq ft?

back 33

front 34

What is the backwash rise rate in inches/minute if the backwash flow rate is 35 GPM/sq ft?

back 34

front 35

What is the backwash pumping rate in GPM for a filter 20' long x 30' wide with a desired backwash rate of 25 GPM/sq ft?

back 35

front 36

How much water is needed to back wash the filter in question 35 for 8 minutes?

back 36

120,000 Gallons (15,000 GPM x 8 min)

front 37

During a filter run, flow through the filter was 12.8 MG. It took 120,000 gallons to backwash the filter. What percent of the filter's water production was used for backwashing?

back 37

1%

front 38

What is the minimum treatment required for drinking water by the Surface Water Treatment Rule (SWTR)?

back 38

Filtration and Disinfection

front 39

Where should you install a particle counter at a WTP?

back 39

As close as possible to the point of measurement

front 40

The length of a sample line of a particle counter should be how long?

back 40

As short as possible

front 41

Pumping sample water to the particle counter may cause what problem?

back 41

Air bubbles, which may be erroneously counted as particles

front 42

What material is recommended for the sample line of a particle counter?

back 42

Black Nylon with Hytril Liner

front 43

What is the final step for removal of suspended solids?

back 43

Filtration