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WATER LEVEL 3 Part 2 > WATER LICENSE LVL 3 > Flashcards

WATER LICENSE LVL 3 Flashcards

1
Q

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

A

Contamination by wildlife

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2
Q

When the water velocity increases, what conditions will increase?

A

Corrosion

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3
Q

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

A

Water Ph goes down

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4
Q

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

A

High line jumpers

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5
Q

The hydraulic gradient always slopes in which direction?

A

Downwards in direction of flow

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6
Q

Where is the operating valve on a dry hydrant?

A

Bottom

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7
Q

What velocity is needed to flush debris from mains?

A

2.5 ft/sec up to 5 ft/sec

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8
Q

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

A

Remove ASAP

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9
Q

Name 2 disease causing bacteria

A

Cholera and Typhoid

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10
Q

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

A

1000 ppm or 0.1%

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11
Q

What is the main purpose for storage tanks?

A

To provide water at PHF (peak hourly flows)

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12
Q

What are the secondary purposes for storage tanks?

A

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

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13
Q

Who is responsible for your safety?

A

You are

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14
Q

Before entering a confined space what must be done?

A

Test atmosphere

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15
Q

A confined space permit is written by whom?

A

Competent person

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16
Q

Who inspects excavations?

A

Competent person

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17
Q

Who oversees OSHA?

A

Labor department

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18
Q

When was the OSHA law enacted?

A

Started in 1970

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19
Q

What is MSDS

A

Material safety data sheet

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20
Q

What are the most common causes of accidents?

A

Carelessness and negligence

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21
Q

When are restrained joints used?

A

When soil movement may be expected

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22
Q

What are as-builts?

A

Exact finished construction plans

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23
Q

What is the best way to prevent backflow

A

Permanently eliminate the hazard

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24
Q

How is atmospheric breaker installed?

A

Above highest outlet

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25
Q

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

A

RP (RPZ)

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26
Q

What backflow device provides the least protection?

A

Double check valve

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27
Q

What is used to fill elevate tank?

A

Booster pump

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28
Q

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

A

Cavitation

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29
Q

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

A

Cavitation

30
Q

What are the main purposes of hydro pneumatic tanks?

A

Maintain PSI and operate pumps

31
Q

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

A

Corrosion

32
Q

What factors increase corrosion?

A

Low ph, soft water, high tds and dissolved oxygen

33
Q

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

A

Nameplate

34
Q

The nameplate should never be?

A

Covered with paint

35
Q

What parameter is used to measure the clarity of water?

A

Turbidity

36
Q

What is the purpose of water rings ?

A

Plug internal leakage

37
Q

Exercising valves is an example of what type of maintenance?

A

Preventive maintenance

38
Q

What are the 3 type of maintenance?

A

Predictive
Preventive
Corrective

39
Q

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

A

SCADA

40
Q

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

A

10 feet

41
Q

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

A

Competent person

42
Q

A water distribution system should be in what configuration?

A

Looped or Grid

43
Q

How much cover to bury a pipe?

A

Minimum of 30” cover

44
Q

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

A

Bell should face uphill

45
Q

What does the C facture measure?

A

Interior wall of pipe smoothness

46
Q

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

A

Tuberculation

47
Q

The higher the C factor the _______, the pipe

A

Smoother

48
Q

What is the action level for lead?

A

0.015mg/L

49
Q

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

A

Backsiphonage

50
Q

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

A

Backflow

51
Q

What backflow device provides the most positive protection?

A

Air Gap

52
Q

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

A

Crossconection

53
Q

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

A

2ft OSHA requirements

54
Q

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

A

Sloping

55
Q

What is the most common pump used in water system?

A

Centrifugal

56
Q

What is the minimum PST allowed in a distribution system?

A

20 PSI

57
Q

What is the purpose of a surge chamber

A

Eliminate water hammer

58
Q

What is the most commonly used meter in residential areas?

A

Nutating Disc

59
Q

What is the most commonly used meter in residential areas?

A

Nutating Disc

60
Q

When was the safe drinking water act enacted?

A

1974

61
Q

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

A

Confined space

62
Q

Who can write a permit for a confined space?

A

Competent person

63
Q

What chemical is used to determine chlorine residual?

A

DPD

64
Q

What does HTH mean?

A

High test hypochlorite

65
Q

What is the most numerical range of PH

A

0-14

66
Q

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

A

Acidic

67
Q

Water with Ph of 7 is considered?

A

Neutral

68
Q

Water with ph above 7 is considered?

A

Base

69
Q

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

A

Stainless steel

70
Q

All excavations 4ft deep are considered to be?

A

Confined spaces

71
Q

What backflow device gives the least protection ?

A

Double check

72
Q

What is the minimum coverage for a buried pipe?

A

30”

WATER LEVEL 3 Part 2 (1 decks)

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