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Water > Class C Water > Flashcards

Class C Water Flashcards

1
Q

What is the proper way to store 150# chlorine cylinders
A) only full cylinders should be chained in an upright position
B) empty cylinders should be laid on their sides until sent back to the chemical company
C) all cylinders should be stored upright and securely chained to a wall
D) store in a room with at least 50% relative humidity

A

C) all cylinders should be stored upright and securely chained to a wall

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2
Q 
At what temp does a fusible plug in a chlorine cylinder melt
A) 158-165 degrees F
B) 210-212 degrees F
C) 158-165 degrees C
D) 110-125 degrees F
A

A) 158-165 degrees F

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3
Q

What is the purpose of a fusible plug in a chlorine cylinder?
A) allows more chlorine to enter the chlorine feed line
B) melts to prevent buildup of pressure and possible rupture due to fire or high temperatures
C) prevents chlorine cylinder from freezing up due to high feed rates
D) helps convert liquid chlorine in the tank to gaseous state

A

B) Melts to prevent buildup of pressure and possible rupture due to fire or high temperatures

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4
Q 
What is the maximum rate (in pounds/day) of chlorine that can be removed from a 150# chlorine cylinder
A) 20 lbs
B) 30 lbs
C) 40 lbs
D) 150 lbs
A

C) 40 lbs

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5
Q

Water should never be applied to a leaking chlorine cylinder because__________
A) it will cause the cylinder to freeze up and prevent adequate feeding rates
B) It will cause the leak to become worse
C) it will cause an explosion
D) All of the above

A

B) It will cause the leak to become worse

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6
Q

If a chlorine cylinder is leaking what should be done first
A) call for help in the form of trained personnel
B) evacuate the entire area
C) submerge the chlorine cylinder in a water tank
D) get yourself to a safe area

A

D) get yourself to a safe area

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7
Q 
How many times heavier is chlorine gas than air?
A) 1.5
B) 2.5
C) 3.0
D) 10.0
A

B) 2.5

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8
Q 
How much does a 150# chlorine cylinder weigh?
A) 150 lbs
B) 200 lbs
C) 225 lbs
D) 270-300 lbs
A

D) 270-300 lbs

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9
Q

What occurs if more than 40 lbs of chlorine gas/day is removed from a 150 lb cylinder?
A) the fusible plug in the cylinder will melt
B) “freezing” can occur and less chlorine will be delivered
C) the cylinder feed lines will break
D) the gas in the cylinder will only last 3 days

A

B) “freezing” can occur and less chlorine will be delivered

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10
Q

If a water plant needs to feed more than 40 pounds of chlorine gas per day and still uses 150# cylinders how can it do it without problems occurring?
A) Shut off the chlorine cylinder part of the time
B) install booster pump on the chlorine feed line
C) just feed 40 lbs and lower your chlorine residual
D) install a manifold and pull gas from 2 or more cylinders at the same tim

A

D) install a manifold and feed gas from 2 or more cylinders at the same time

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11
Q 
Where must the vent fan in a gas chlorine room be located
A) in the ceiling
B) Built into an interior door
C) near the floor of a wall
D) built into an exterior door
A

C) near the floor of a wall

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12
Q

Where must chlorine equipment be located
A) in the same room with the rest of the chemicals
B) in a separate room with an exterior access door
C) in the lowest part of the treatment plant
D) near the final point of application of the chemicals

A

B) in a separate room with an exterior access door

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13
Q

Where should the self-contained oxygen tank (SCOT) pack be stored
A) in the chlorine room
B) in an accessible location elsewhere in the plant
C) at the fire house
D) at home

A

B) in an accessible location elsewhere in the plant

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14
Q

What should an operator use to test chlorine cylinders for leaks
A) his nose
B) his assistant’s nose
C) an ammonia solution held near the cylinder/valve
D) an approved chlorine gas meter

A

C) an ammonia solution held near the cylinder/valve

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15
Q 
What occurs if ammonia is introduced near a chlorine leak
A) white smoke will appear
B) the cylinder will explode
C) the cylinder will "freeze up"
D) nothing
A

A) white smoke will appear

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16
Q

The swab which has been soaked with ammonia solution should not touch the brass cylinder. Why?
A) it will cause the cylinder to leak at a later time
B) it will damage the brass plating on the cylinder valve
C) it will cause the valve to leak immediately
D) it will make the valve harder to turn

A

B) it will damage the brass plating on the cylinder valve

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17
Q 
A chlorine cylinder valve must be opened\_\_\_\_\_\_to operate at full capacity
A) at least 1/4 turn
B) at least 1 full turn
C) all the way
D) fully then backed off 1/2 turn
A

B) at least 1 full turn

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18
Q

What is the purpose of a rotameter on a chlorinator
A) measures the flow rate of gaseous chlorine into the feed lines
B) records the number of pounds of chlorine used in a 24 hour period
C) Neither a or b
D) both a and b

A

A) measures the flow rate of the gaseous chlorine into the feed lines

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19
Q

Chlorine gas in itself is non-flammable and non-explosive

T or F

A

T

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20
Q

Since the gaskets used on a chlorine cylinder are made of lead they can be used mere than once
T or F

A

F

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21
Q

What is CT time in regards to disinfection
A) Where T is the time in minutes and where C is the concentration of the disinfection residual in mg/L “c”x”t” provides a measure of pathogenic inactivation
B) contact time
C) concentration techniques
D) chlorine testing

A

A) Where T is the time in minutes and where C is the concentration of the disinfection residual in mg/L “C”x”T” provides a measure of the pathogenic inactivation

22
Q

A plant uses a hypochlorinator as its disinfection equipment. What is a hypochlorinator?
A) a gas chlorination unit
B) a chlorination unit that uses sodium hypochlorite as the disinfecting agent
C) a chlorination unit that uses calcium hypochlorite as its disinfection agent
D) a chlorination unit that uses calcium hypochlorite stacked in a plastic slot and water which disinfects the water

A

B) a chlorination unit that uses sodium hypochlorite as the disinfection agent

23
Q 
What safety equipment should be used when filling a hypochlorinator
A) rubber gloves
B) goggles or face protection
C) chemical resistant apron
D) all of the above
A

D) all of the above

24
Q

A plant uses gas a gas chlorination unit. Water is venting to the atmosphere. What is the probable cause
A) excess water pressure to the vacuum regulator
B) venturi meter failure
C) tailway failure
D) injector failure

A

A) excess water pressure to the vacuum regulator

25
Q 
What should the chlorine dose of water that has a demand of 2.5 mg/L be if a residual of 0.6 mg/L is desired
A) 2.3 mg/L
B) 3.1 mg/L
C) 0.6 mg/L
D) 1.9 mg?l
A

B) 3.1 mg/L
(add the demand and the desired residual)
2.5 mg/L + 0.6 mg/L = 3.1 mg/L

26
Q 
What component listed below is not part of a chlorine gas cylinder
A) valve packing gland
B) fusible plug
C) packing nut
D) injector
A

D) injector

27
Q

A gas chlorinator rotometer has a small ball that acts as an indicator of how many pounds per day of chlorine is being fed. If the rotometer is replaced the ball should be __________
A) cleaned in soapy water and replaced
B) held with a dry clean cloth to avoid moisture when reinserting it into the rotometer
C) while being held with tweezers it should be soaked in alcohol, flamed, and reinserted into the rotometer
D) replaced with a heavier ball

A

B) held with a dry clean cloth to avoid moisture when reinserting into the rotometer

28
Q

If an operator experiences a mild case of chlorine gas inhalation the following should be done:
A) leave the contaminated area , move slowly, remain calm, remove any contaminated clothing, and keep warm
B) run immediately for assistance, breathe in deep breaths, act in a crazy way
C) shower, put on clean clothes, resist coughing
D) A and C

A

D) A and C

29
Q

If a chlorine gas victim has a slight throat irritation what action should be taken
A) breathe in copious amounts of cold air
B) drink milk
C) drink spirits of peppermint
D) both B and C

A

D) Both B and C

30
Q 
A chemical feed pump used to pump solutions such as sodium hypochlorite of HFS acid works best when it is operated at \_\_\_\_\_\_\_%
A) 100%
B) 25%
C) 45-60%
D) doesn't matter
A

C) 45-60%

31
Q

If phosphate is added to your water you should _____ the amount chlorine that you fed before
A) increase
B) Decrease
C) continue

A

A) Increase

32
Q 
An applicant for the class C operator certification examination must have \_\_\_\_\_ years "hands on" experience.  Assume that the applicant is a high school graduate and has taken no approved training
A) six months
B) one year
C) two years
D) three years
A

B) one year

6 mo = class d
1 yr = class c
2 yr = class b
3 yr = class a
33
Q

Monthly water reports completed at a class 3 facility should at a minimum contain
A) total gallons pumped on a daily basis
B) the amount of each chemical used each day
C) the results of all lab tests conducted
D) all of the above

A

D) all of the above

34
Q

The addition of fluoride to drinking water in the 0.7 mg/l range helps prevent _____
A) the formation of plaque on teeth
B) human bones from becoming brittle
C) dental caries (concerns)

A

C) dental caries (concerns)

35
Q

Fluoride exists naturally in water, rocks, and soil

T or F

A

T

36
Q

Every public water supply in Illinois must add fluoride to their finished water, if its natural fluoride level is below 0.7 mg/l
T or F

A

T

37
Q 
If your supply is a participant in the IEPA Lab Fee Program you will receive bottles from the IEPA lab and you return the fluoride sample to the IEPA for analysis.  The fluoridation program in Illinois is under the
A) IEPA
B) USEPA
C) US Health and Human Services
D) Illinois Department of Health
A

D) Illinois Department of Health

38
Q 
The maximum level of fluoride (in mg/l) allowed in drinking water without the requirement of public notice is
A) 1.2 mg/l
B) 2.0 mg/l
C) 2.5 mg/l
D) 4.0 mg/l
A

B) 2.0 mg/l

39
Q

What is a fluoride saturator
A) a chemical feed machine that includes a plastic tank, and electric agitator, and a chemical feed pump
B) a fluoride chemical feed machine that includes a plastic tank, a chemical feed pump, a layer of sand and gravel, and plastic underdrain
C) a fluoride chemical feed machine that utilizes hydrofoluosilicic acid (HFS acid) as its base
D) a fluoride chemical feed machine that produces its own fluoride on site

A

B) a fluoride chemical feed machine that uses a plastic tank, a chemical feed pump, a layer of sand and gravel, and a plastic underdrain

40
Q

Why should a small amount of chlorine bleach be added to a fluoride saturator on a routine basis
A) to disinfect the water leaving the tank
B) to prevent algae growth from forming in the media
C) regulations require a 10 mg/l residual
D) both b and c

A

B) to prevent algae growth from forming in the media

41
Q

If an operator is using HFS acid as his chemical of choice he should not allow fumes to escape from the chemical tank or drum because
A) the fumes can etch glass surfaces
B) the fumes can cause distress if breathed
C) the fumes will cause damage to concrete surfaces
D) both a and b

A

D) both a and b

42
Q

The two most common types of fluoride used in water supply treatment are _____
A) sodium fluoride and Hydrofluosilicic acid
B) sodium fluoride and SPANDs solution
C) HFS acid and standard fluoride solution
D) sodium fluoride and breakpoint fluoridation

A

A) sodium fluoride and hydrofluosilicic acid

43
Q

If a well pump and or column has been removed from a well it should be properly disinfected before it is re-installed in the wel. Why?
A) to remove any buildup of from the parts
B) to prevent the growth of iron bacteria
C) to disinfect the water in the casing
D) to assist in priming the pump after re-installation

A

B) to prevent the growth of iron bacteria

44
Q

A foot valve is often placed at the inlet to the pump suction line in a well. What purpose does this serve?
A) maintains the “prime” on the pump
B) prevents reversal of flow into the well when the pump shuts off
C) eliminates problems created when there is no means of discharging air in the column pipe and the air can enter the system
D) all of the above

A

D) all of the above

Foot Valve = Check Valve

45
Q 
What are some of the different techniques used to preform casing and screen maintenance? Check all that apply
\_\_Surging
\_\_high velocity jetting
\_\_acid treatment
\_\_chlorine treatment
\_\_polyphosphates
\_\_explosive charges
A

ALL OF THEM

46
Q

What is a pitless adapter
A) a fitting which allows the well casing to be extended above grade while having a discharge connection located below the frost line
B) a fitting that allows water to enter the main when the pump is turned on but prevents water from flowing back into the well when the pump is off
C) a fitting that eliminates the need for a pit or a pump house
D) all of the above

A

D) all of the above

47
Q 
A public water supply must submit bacti samples every month.  A standardized report sheet is submitted with these samples.  A copy of this report must be sent back to you with the lab analysis results.  These reports must be kept on file for a minimum of \_\_\_\_\_
A) one calendar year
B) tow years
C) three years
D) five years
A

D) five years

48
Q 
Once an operator receives his or her water treatment plant operator certificate, it is renewable every \_\_\_\_
A) every year
B) every 3 years
C) every 5 years
D) never needs renewed
A

B) every 3 years

49
Q 
What percentage is 8 lbs of water to 100 gallons
A) .96%
B) 80%
C) 92%
D) 0.009%
A

A) .96%

50
Q 
What percentage is 8 gallons of water of 100 lbs
A) 34%
B) 66.7%
C) .66%
D) non of the above
A

C) 66.7%

Water (1 decks)

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