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Entry Level Certificate > Water Treatment > Flashcards

Water Treatment Flashcards

0
Q

What is the application of calcium carbonate ?

A

Hardness And alkalinity

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1
Q

What is the common application for alum or aluminum sulphate?

A

coagulation

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2
Q

Common application for calcium hydroxide or lime

A

Ph adjustment, softening

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3
Q

Calcium hypochlorite is used for?

A

Disinfection

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4
Q

Chlorine is used for?

A

Disinfection

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5
Q

Chlorine dioxide is used for ?

A

Disinfection

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6
Q

Potassium permanganate is used for?

A

Oxidation

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7
Q

Sodium hypochlorite is used for?

A

Disinfection

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8
Q

True or false. Sodium silicate is used as a coagulant aid. And for sequestering?

A

True

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9
Q

Sulphuric acid is used for?

A

Ph adjustment

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10
Q

True or false. Water pressure is related to water depth?

A

True

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11
Q

What is static pressure?

A

Static pressure is the pressure of fluid at rest

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12
Q

What is headloss?

A

Headloss is loss of pressure due to friction cause by things like pipe diameter valves and pipe smoothness

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13
Q

What is water hammer and what causes it?

A

Water hammer is force cause by a sudden change in water velocity. It can be caused by opening and closing valves, starting and stopping pumps. These can cause pipe rupture or main breaks

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14
Q

Define cavitation

A

Cavitation is the formation or collapse of a gas bubble that can damage equipment.

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15
Q

Turbidity is measured in what units?

A

NTU

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16
Q

Why is Turbidity harmful to the treatment process?

A

Because particles that cause Turbidity can hide or entrap harmful organisms so that the disinfectant can’t reach and destroy the organisms

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17
Q

At what level does Turbidity become visible ?

A

5.0 NTU

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18
Q

Colour of wAter can suggest what?

A

Presence of decomposed organic material like leaves and roots

19
Q

What are DBP’s?

A

Disinfection by products

20
Q

At what temperature do nuisance organisms stop producing in water

A

15^C

21
Q

What ph range is required in water quality standards ?

A

6.5-8.5

22
Q

What treatment processes depend on alkalinity ?

A

Coagulation and floculation

23
Q

Lime and soda ash can increase what?

A

Alkalinity

24
Q

What colour can iron and manganese turn water ?

A

Red black and brown

25
Q

Eutrophication is caused by what ?

A

Excess nutrient loading

26
Q

What does GUDI stand for?

A

Groundwater Under the Direct Influence of surface water

27
Q

In order what steps does a conventional water treatment system implement?

A

Intake, low lift pumping, coagulation, flocculation, sedimentation\filtration, high lift pumping to distribution.

28
Q

Alum requires what ph range to insure effectiveness?

A

5.5-6.0

29
Q

True or false. Cold water is typically harder to coagulate?

A

True

30
Q

Name a few common filtration media

A

GAC, sand, anthracite (coal), sand, garnet, gravel

31
Q

What is back washing ?

A

Back washing is pushing clean water backwards through filters to clean them periodically

32
Q

Reverse osmosis is a type of what kind of filtration process?

A

Membrane filtration.

33
Q

What is coagulation ?

A

Coagulation is the process by which small particles collide to for larger particles called floc. Coagulants neutralize the small particles allowing them to come closer together to cluster

34
Q

What is flocculation.

A

Flocculation is the gathering together of fine particles to form larger particles which settle faster

35
Q

What is sedimentation.

A

Sedimentation is a process which solid particles settle out of being treated water

36
Q

OWRA

A

Ontario Water Resources Act.

37
Q

SDWA

A

Safe Drinking Water Act.

38
Q

O. Reg 163/03 is also known as what ?

A

Drinking water quality standards regulation

39
Q

O. Reg 170/03 is also known as ?

A

Drinking water systems regulation

40
Q

The safe drinking water act deals

With ?

A

The protection of human health through regulation and control of water systems. Municipalities require a c of a under this act

41
Q

Ontario drinking water quality standards are ?

A

Minimum level of drinkin water quality for human consumption. Including microbial standards. Chemical standards and radiological standards

42
Q

Drinking water systems require what value of chlorine residual?

A

0.05 mg/L

43
Q

What is disinfection ?

A

Disinfection is the process of removal/inactivation of pathogenic organisms by physical or chemical means.

44
Q

True or false. Uv light is not a physical process of disinfection?

A

False

Entry Level Certificate (1 decks)

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