Continued

Question 1

Separation of water main and sewer

Answer 1

6ft 1ft horizontally and 6” preferably 1ft above

Question 2

Tuberculation process is?

Answer 2

Chemical Process of buildup of minerals

Question 3

After chlorine level is met the amount of chlorine in water is called

Answer 3

Residual Chlorine level

Question 4

Chloramines are formed by combination of chlorine and ?

Answer 4

Ammonia

Question 5

Back flow is a condition that

Answer 5

Has reversed flow due to pack pressure

Question 6

Minimum distance that soil pile should be placed from edge of trench

Answer 6

2 feet

Question 7

How many ladders are required in 4ft trench 100 ft long

Answer 7

Two

Question 8

What type of pump is used to pump water into a system

Answer 8

Centrifugal pump

Question 9

Total dynamic head consists of

Answer 9

Suction lift- friction head - discharge head- velocity head

Question 10

What is static head

Answer 10

Pressure due to depth of elevation of water

Question 11

What is hydrostatic pressure testing used for in new mains

Answer 11

To locate leaks

Question 12

Florida drinking water regulations include man contaminant levels except for

Answer 12

Color contaminants

Question 13

What does 1991 coliform rule require

Answer 13

95 percent of samples must be free of coliform

Question 14

What affects chlorine disinfectant properties

Answer 14

Temperature

Question 15

Chlorine is most affective at

Answer 15

Ph of 7

Question 16

Minimum feet per second water main should be flushed

Answer 16

2.5 feet per second

Question 17

Max pressure of service connection

Answer 17

Less than 100 psi

Question 18

What does not describe unindirectional flushing

Answer 18

Uses more water

Question 19

Total amount of chlorine pumped into a system is called

Answer 19

Chlorine dose

Question 20

3 methods of disinfecting

Answer 20

Slug, continuous, tablet

Question 21

Main continuint in water that causes corrosion of metals

Answer 21

Dissolved oxygen

Question 22

Amount of chlorine used in reaction with inorganic and organic impurities is known as

Answer 22

Chlorine demand

Question 23

Difference between ground water and surface water

Answer 23

Ground- more minerals
Surface- more toxicants

Question 24

Back flow is

Answer 24

Reversed flow due to back pressure

Question 25

Advantage of preventive maintenance

Answer 25

Improved performance

Question 26

Trench for type c soil should be

Answer 26

1 1/2 to 1 or greater

Question 27

For lead and copper test water should be in pipe for how long

Answer 27

6 hrs

Question 28

Where should mains be anchored

Answer 28

When pipe changes size direction and at dead ends

Question 29

What metal is used as an expendable anode

Answer 29

Magnesium

Question 30

When does chlorine become corrosive

Answer 30

When moisture is added

Question 31

How long should MORs sanitary surveys and cross connection control programs reports be kept

Answer 31

10 years

Question 32

What is caused when there is negative water pressure

Answer 32

Back siphonage

Question 33

Where should coliform test samples be taken from

Answer 33

Locations tapped directly into the main

Question 34

Why is sodium thiosulfate added to the microbiological sample bottle

Answer 34

It gets rid of any chlorine residual in the bottle

Question 35

Hydrant with flow rate of 1500gpm should be what color

Answer 35

Blue

Question 36

Can a butterfly valve be used for throttling

Answer 36

Yes

Question 37

Difference between ground water and surface water contamination

Answer 37

Ground water takes longer to recover from contamination

Question 38

What happens when metals are connected

Answer 38

Galvanic action will occur

Question 39

If pipeline is not restrained thrust blocks can be used where

Answer 39

Every bend and transition