Sample T1-T2 Water Treatment Operator Test

Front 1

The term for the combined process which transfer liquid water on earths surface into water in the gas phase in the atmosphere is:

Back 1

Evapotranspiration

Front 2

The height to which water will rise in wells located in an artisan aquifer is called the:

Back 2

Piezometric surface

Front 3

Quality problems encountered with raw water withdrawn from below the thermocline in stratified lakes usually stem from:

Back 3

Oxygen depletion

Front 4

Hardness in water is due to dissolved :

Back 4

Calcium and Magnesium

Front 5

The time normally required to obtain total coliform results from the Presumptive Test is:

Back 5

48 hours

Front 6

A disinfection by product associated with ozone is:

Back 6

Bromate

Front 7

The multiple tube fermentation analysis consists of:

Back 7

Presumptive, confirmed, and completed tests.

Front 8

Common mixing methods in the flocculation process include:

Back 8

Hydraulic mixing, turbine mixers, and horizontal paddle wheels .

Front 9

Particles that are removed readily by sedimentation and filtration process are:

Back 9

Suspended

Front 10

A bacteriological test that measures only the presence or absence of coliform is:

Back 10

Colilert

Front 11

Raw surface water taste and odor problems are most likely the result of:

Back 11

Blue green algae growth.

Front 12

The purpose of flocculation is:

Back 12

Increase particle size

Front 13

Disinfection by products can be formed by the reaction of disinfectants with:

Back 13

Natural organic matter

Front 14

The unique ingredient in the confirmed test of the MPN method is:

Back 14

Brilliant green bile

Front 15

A primary drinking water regulation is based upon:

Back 15

Health effects

Front 16

Alkalinity in drinking water can be contributed by:

Back 16

Carbonate, bicarbonate and hydroxide.

Front 17

Increasing disinfectant dosage is likely to lead to an increase in:

Back 17

Disinfection by products

Front 18

The main advantage of chloramination over chlorination is:

Back 18

Reduced by product formation.

Front 19

The term "CT" stands for:

Back 19

The product of residual concentration multiplied by disinfection time.

Front 20

In the colilert method, the presence of E. Coli can be detected:

Back 20

In 24 hours.

Front 21

The concentration of available chlorine in chlorine gas from 1 ton containers is:

Back 21

100%

Front 22

The device used to regulate and control the rate of feed of chlorine gas is called a:

Back 22

Chlorinator

Front 23

This is a secondary drinking water standard:

Back 23

Odor

Front 24

Chlorine residual is measured in the field using the:

Back 24

DPD colorimetric method.

Front 25

The device that generates the vacuum conditions for chlorine gas application is called a:

Back 25

Eductor

Front 26

Algae growth in untreated surface water reservoirs can be reduced by applying:

Back 26

Copper sulfate

Front 27

The vertical distance between the static water level and the pumping water level in an operating well is known as the:

Back 27

Drawdown

Front 28

The main focus of the surface water treatment rule is the control of:

Back 28

Pathogens

Front 29

Bacteria and viruses are particles of a size category that is called:

Back 29

Colloidal

Front 30

The main purpose of coagulation is to:

Back 30

Destabilize colloidal particles

Front 31

Colloidal particles resist coalescing and coagulation because of their:

Back 31

Surface charge

Front 32

To comply with the surface water treatment rule, plants must address pathogens by:

Back 32

Physical removal and chemical inactivation

Front 33

A chemical frequently applied prior to coagulation is:

Back 33

Chlorine

Front 34

The most common form of coagulant aid is:

Back 34

Cationic polymer

Front 35

This treatment technology is approved by the SWTR:

Back 35

Diatomaceous earth filtration

Front 36

When flocculation mixing intensity drops from stage to stage, it is termed:

Back 36

Tapered flocculation

Front 37

The layer of a stratified lake that is most likely to be impacted by algae is called the:

Back 37

Epilimnion

Front 38

Typical filtration rates for dual media filters in conventional treatment plants are:

Back 38

2-6 gallons per minute per square foot.

Front 39

The single most important indicator of filter performance is the removal of:

Back 39

Turbidity

Front 40

As a typical filter run proceeds , head loss in the filter media will:

Back 40

Gradually increase

Front 41

A chemical that is frequently applied just prior to filtration is:

Back 41

Anionic or nonionic polymer

Front 42

The most common reason for ending a filter run is:

Back 42

Terminal head loss

Front 43

A common form of sludge removal in rectangular sedimentation basins is:

Back 43

Chain and flight collectors

Front 44

This is likely to occur within the first few minutes after a filter has been backwashed:

Back 44

Initial turbidity spike

Front 45

A filter contains 24" of anthracite coal over 12" of sand over 12" of gravel. Such a filter is termed:

Back 45

A dual media filter

Front 46

A clay layer in the soil resists the flow of groundwater. Such a layer is called:

Back 46

An aquitard.

Front 47

During a filter run, the varying head loss associated with particle capture is offset mechanically by the automatic adjustment of the:

Back 47

Filter effluent valve

Front 48

The lowest reportable concentration of any constituent in drinking water is the:

Back 48

Detection level for reporting

Front 49

If you encounter a liquid chlorine leak in a one ton container, what action should you take first, to reduce the severity of the leak?

Back 49

Rotate the container to place the leak at the top.

Front 50

Chlorine is applied at a dosage rate of 2.5 mg/l. After a reaction time of over 4 hours in the clear wells, the chlorine residual is 1.5 mg/l. What is the chlorine demand?

Back 50

1.0 mg/l

Front 51

The biological transformation of liquid water into gaseous water vapor is called:

Back 51

Transpiration

Front 52

The surest indicator that any single tube in a multiple tube fermentation test has positive results is:

Back 52

Gas formation

Front 53

The surface water treatment rule requires that the combined removal and inactivation of Giardia cysts must be at least:

Back 53

3.0 logs

Front 54

The pH value of pure water is:

Back 54

7.0

Front 55

The fusible plug that is in all chlorine containers:

Back 55

Should never be removed or tampered with.

Front 56

Secondary drinking water standards are generally based upon:

Back 56

Aesthetic properties

Front 57

The term for a water bearing formation in the soil:

Back 57

Aquifer

Front 58

An aquifer is usually composed of:

Back 58

Sand and gravel