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Water Operator Grade IV Certification - copy (AWWA) Questions and Answers
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Water Operator Grade IV Certification -copy (AWWA)
The main objective of a safety program is to _ _. - answerprevent accidents
_, _ _ is the most appropriate person for evaluating a potential safety hazard. -
answeryou
the operator
_, _ _ has the most to gain from an effective safety program. - answeryou
the operator
For a water system to have an effective safety program, the most important item that
operators can do is _ _ _ _ (_). - answercommit to the program (attitude)
Excavated material, tools, and other equipment needs to be placed at least __ feet
away from the surface edge of an excavation. - answer2
If the trench is _ feet deep or more it will require a fixed means of egress. - answer4
For a trench, exits must be provided at least every _ feet. - answer25
Ladders must be secured and extend a minimum of _ feet above the landing. - answer3
If a trench is _ feet deep or more it will require some means of protection - answer5
Why is shoring used in trenches? To prevent _ and _. - answerinjury
death
A flagger is required at least _ feet in front of an excavation site. - answer100
_ is the most common combustible gas. - answerMethane
One volume of liquid chlorine will expand _ to _ volumes of gaseous chlorine. This
means that it is important to rotate the tank so the rupture is at the top. - answer450
460
Chlorine gas is _ times denser than air. - answer2.5
Chlorine containers/cylinders are filled to _ % of capacity. - answer25
,To check for leaks use an ammonia solution. A _ _ will appear if there is a chlorine leak.
- answerwhite cloud
Repair Kit _ is used for for 150 lb. cylinders. - answera
Kit _ is used for ton containers. - answerb
A SCBA air supply will last _ on individual breathing patterns while under stress. -
answerdepending
The most dangerous type of chlorine incident is _ or _ of a cylinder. - answerrupture
failure
Fusible Plugs are used to prevent tank rupture for controlled leak situations and melt
between _ to _ Fahrenheit. - answer157
160
Ton containers have _ fusible plugs mounted on each end. - answer3
Exhaust fans should be ducted at _ _. - answerfloor level
Fresh air intake are ducted at the _. - answerceiling
_ _, _ _, _ _, _ _, and _ _ are recommended safety equipment when working with
fluoride chemicals. - answerchemical goggles
respirator mask
rubber gloves
rubber apron
rubber boots
Use _ _ to neutralize acid spills. This chemical is also know by its household name _ _.
- answersodium bicarbonate
baking soda
What are some potential hazards in confined spaces?
_ gases and/or _ oxygen content
_
_ of electrical equipment
_, _, and _. - answertoxic low
flooding
condensation
slips trips falls
, An atmosphere that has _ oxygen by volume is considered oxygen deficient. -
answer19.5
_ _ is the procedure that should be followed every time when working with electrical
equipment. This prevents accidental energizing of equipment. - answerLockout Tag
Lockout tags can be removed _ _ _ _ _ _ _ _. - answeronly by the person who put it on
_ _ and _ two types of electrical safety devices found in control panels. - answercircuit
breakers
fuses
Vulnerability Assessments are required for systems serving populations of _ or more. -
answer3300
_, _, and _ are the three stages of threat management. - answerpossible
credible
confirmatory
Water systems are concerned about Smallpox because it is both a _ and a _ that has a
high rate of _ transmission. - answerpathogen
biotoxin
secondary
What are the three FEMA disaster classifications? - answerWhat are the three FEMA
disaster classifications?
_ is legislation requiring utilities to report chemicals stored on site. - answersara
Password protect and change password every _ days. - answer90
Pathogenic are _ causing organisms. - answerdisease
Organisms that don't cause disease are _-_. - answernon-pathogenic
_ is a process to kill pathogenic organisms. - answerdisinfection
_ is a is a natural component of the earth's upper atmosphere, where it is primarily
formed photo chemically. - answerozone
Ozone doesn't leave a lasting _. - answerresidual
What is the molecular formula for ozone? - answero3
What is the molecular structure of oxygen gas? - answero2.
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