WATER LICENSE LVL 3

Question 1

Overflow and air vents not screened may allow what problem to occur?

Answer 1

Contamination by wildlife

Question 2

When the water velocity increases, what conditions will increase?

Answer 2

Corrosion

Question 3

When chlorine is added to H20, what reaction takes place?

Answer 3

Water Ph goes down

Question 4

Pipes or hoses connected to fire hydrants and laid on top of the ground , which provided emergency water for customers are called?

Answer 4

High line jumpers

Question 5

The hydraulic gradient always slopes in which direction?

Answer 5

Downwards in direction of flow

Question 6

Where is the operating valve on a dry hydrant?

Answer 6

Bottom

Question 7

What velocity is needed to flush debris from mains?

Answer 7

2.5 ft/sec up to 5 ft/sec

Question 8

What should be done with pavement, rocks, and stones from excavations?

Answer 8

Remove ASAP

Question 9

Name 2 disease causing bacteria

Answer 9

Cholera and Typhoid

Question 10

What amount of chlorine in a room will cuase death within seconds?

Answer 10

1000 ppm or 0.1%

Question 11

What is the main purpose for storage tanks?

Answer 11

To provide water at PHF (peak hourly flows)

Question 12

What are the secondary purposes for storage tanks?

Answer 12

Detention time for disinfection
Fire fighting
Reserve storage for maintenance
Maintain PSI

Question 13

Who is responsible for your safety?

Answer 13

You are

Question 14

Before entering a confined space what must be done?

Answer 14

Test atmosphere

Question 15

A confined space permit is written by whom?

Answer 15

Competent person

Question 16

Who inspects excavations?

Answer 16

Competent person

Question 17

Who oversees OSHA?

Answer 17

Labor department

Question 18

When was the OSHA law enacted?

Answer 18

Started in 1970

Question 19

What is MSDS

Answer 19

Material safety data sheet

Question 20

What are the most common causes of accidents?

Answer 20

Carelessness and negligence

Question 21

When are restrained joints used?

Answer 21

When soil movement may be expected

Question 22

What are as-builts?

Answer 22

Exact finished construction plans

Question 23

What is the best way to prevent backflow

Answer 23

Permanently eliminate the hazard

Question 24

How is atmospheric breaker installed?

Answer 24

Above highest outlet

Question 25

What backflow device is used when there is a high degree od hazard?

Answer 25

RP (RPZ)

Question 26

What backflow device provides the least protection?

Answer 26

Double check valve

Question 27

What is used to fill elevate tank?

Answer 27

Booster pump

Question 28

What term is used to describe the formation and collapse of air bubbles or gas pocket on the blade of an impeller?

Answer 28

Cavitation

Question 29

What is the most often cause of a sound within a pump like that of someone pounding on the impeller with a hammer?

Answer 29

Cavitation

Question 30

What are the main purposes of hydro pneumatic tanks?

Answer 30

Maintain PSI and operate pumps

Question 31

What do you call the gradual de compensation of material by chemical action, often due to an electromechanical reaction?

Answer 31

Corrosion

Question 32

What factors increase corrosion?

Answer 32

Low ph, soft water, high tds and dissolved oxygen

Question 33

What durable metal plate is located on equipment and lists critical info concerning equipment?

Answer 33

Nameplate

Question 34

The nameplate should never be?

Answer 34

Covered with paint

Question 35

What parameter is used to measure the clarity of water?

Answer 35

Turbidity

Question 36

What is the purpose of water rings ?

Answer 36

Plug internal leakage

Question 37

Exercising valves is an example of what type of maintenance?

Answer 37

Preventive maintenance

Question 38

What are the 3 type of maintenance?

Answer 38

Predictive Preventive Corrective

Question 39

What type of equipment is used to monitor distribution storage and water pressure?

Answer 39

SCADA

Question 40

A water line must be how many feet horizontally from a sewer pipe?

Answer 40

10 feet

Question 41

A person capable of identifying existing and or predictable hazards in the work environment is called?

Answer 41

Competent person

Question 42

A water distribution system should be in what configuration?

Answer 42

Looped or Grid

Question 43

How much cover to bury a pipe?

Answer 43

Minimum of 30” cover

Question 44

When the pipe is being laid downhill, in which direction should the bell be laid?

Answer 44

Bell should face uphill

Question 45

What does the C facture measure?

Answer 45

Interior wall of pipe smoothness

Question 46

The development of small amounts pf corrosion on the inside walls of an iron pipe is called?

Answer 46

Tuberculation

Question 47

The higher the C factor the _______, the pipe

Answer 47

Smoother

Question 48

What is the action level for lead?

Answer 48

0.015mg/L

Question 49

A form of backflow caused by a negative or below atmospheric pressure is called

Answer 49

Backsiphonage

Question 50

A reverse flow condition, created by a difference in water pressure, which causes water to flow back into the distribution system pipes is called?

Answer 50

Backflow

Question 51

What backflow device provides the most positive protection?

Answer 51

Air Gap

Question 52

What is the largest cause of waterbone illness in the USA?

Answer 52

Crossconection

Question 53

The spoils must be placed how far back from the edge of the trench?

Answer 53

2ft OSHA requirements

Question 54

If a trench cannot be shored, what other method can be used to keep employees safe?

Answer 54

Sloping

Question 55

What is the most common pump used in water system?

Answer 55

Centrifugal

Question 56

What is the minimum PST allowed in a distribution system?

Answer 56

20 PSI

Question 57

What is the purpose of a surge chamber

Answer 57

Eliminate water hammer

Question 58

What is the most commonly used meter in residential areas?

Answer 58

Nutating Disc

Question 59

What is the most commonly used meter in residential areas?

Answer 59

Nutating Disc

Question 60

When was the safe drinking water act enacted?

Answer 60

1974

Question 61

Any space that has limited means of exit entry and is not meant for human occupancy is referred to as?

Answer 61

Confined space

Question 62

Who can write a permit for a confined space?

Answer 62

Competent person

Question 63

What chemical is used to determine chlorine residual?

Answer 63

DPD

Question 64

What does HTH mean?

Answer 64

High test hypochlorite

Question 65

What is the most numerical range of PH

Answer 65

0-14

Question 66

A ph below 7 indicates that the water may be on what state?

Answer 66

Acidic

Question 67

Water with Ph of 7 is considered?

Answer 67

Neutral

Question 68

Water with ph above 7 is considered?

Answer 68

Base

Question 69

What type of bolts are used on split sleeves, repair clamps and couplings?

Answer 69

Stainless steel

Question 70

All excavations 4ft deep are considered to be?

Answer 70

Confined spaces

Question 71

What backflow device gives the least protection ?

Answer 71

Double check

Question 72

What is the minimum coverage for a buried pipe?

Answer 72

30”