1
WATER OPERATOR GRADE IV
CERTIFICATION
The main objective of a safety program is to _ _. correct answerprevent
accidents
_, _ _ is the most appropriate person for evaluating a potential safety
hazard. correct answeryou
the operator
_, _ _ has the most to gain from an effective safety program. correct
answeryou
the operator
For a water system to have an effective safety program, the most
important item that operators can do is _ _ _ _ (_). correct
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. correct
answer2
,2
If the trench is _ feet deep or more it will require a fixed means of
egress. correct answer4
For a trench, exits must be provided at least every _ feet. correct
answer25
Ladders must be secured and extend a minimum of _ feet above the
landing. correct answer3
If a trench is _ feet deep or more it will require some means of
protection correct answer5
Why is shoring used in trenches? To prevent _ and _. correct
answerinjury
death
A flagger is required at least _ feet in front of an excavation site. correct
answer100
_ is the most common combustible gas. correct answerMethane
,3
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. correct answer450
460
Chlorine gas is _ times denser than air. correct answer2.5
Chlorine containers/cylinders are filled to _ % of capacity. correct
answer25
To check for leaks use an ammonia solution. A _ _ will appear if there is
a chlorine leak. correct answerwhite cloud
Repair Kit _ is used for for 150 lb. cylinders. correct answera
Kit _ is used for ton containers. correct answerb
A SCBA air supply will last _ on individual breathing patterns while
under stress. correct answerdepending
The most dangerous type of chlorine incident is _ or _ of a cylinder.
correct answerrupture
failure
, 4
Fusible Plugs are used to prevent tank rupture for controlled leak
situations and melt between _ to _ Fahrenheit. correct answer157
160
Ton containers have _ fusible plugs mounted on each end. correct
answer3
Exhaust fans should be ducted at _ _. correct answerfloor level
Fresh air intake are ducted at the _. correct answerceiling
_ _, _ _, _ _, _ _, and _ _ are recommended safety equipment when
working with fluoride chemicals. correct answerchemical goggles
respirator mask
rubber gloves
rubber apron
rubber boots
Use _ _ to neutralize acid spills. This chemical is also know by its
household name _ _. correct answersodium bicarbonate
baking soda
What are some potential hazards in confined spaces?
WATER OPERATOR GRADE IV
CERTIFICATION
The main objective of a safety program is to _ _. correct answerprevent
accidents
_, _ _ is the most appropriate person for evaluating a potential safety
hazard. correct answeryou
the operator
_, _ _ has the most to gain from an effective safety program. correct
answeryou
the operator
For a water system to have an effective safety program, the most
important item that operators can do is _ _ _ _ (_). correct
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. correct
answer2
,2
If the trench is _ feet deep or more it will require a fixed means of
egress. correct answer4
For a trench, exits must be provided at least every _ feet. correct
answer25
Ladders must be secured and extend a minimum of _ feet above the
landing. correct answer3
If a trench is _ feet deep or more it will require some means of
protection correct answer5
Why is shoring used in trenches? To prevent _ and _. correct
answerinjury
death
A flagger is required at least _ feet in front of an excavation site. correct
answer100
_ is the most common combustible gas. correct answerMethane
,3
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. correct answer450
460
Chlorine gas is _ times denser than air. correct answer2.5
Chlorine containers/cylinders are filled to _ % of capacity. correct
answer25
To check for leaks use an ammonia solution. A _ _ will appear if there is
a chlorine leak. correct answerwhite cloud
Repair Kit _ is used for for 150 lb. cylinders. correct answera
Kit _ is used for ton containers. correct answerb
A SCBA air supply will last _ on individual breathing patterns while
under stress. correct answerdepending
The most dangerous type of chlorine incident is _ or _ of a cylinder.
correct answerrupture
failure
, 4
Fusible Plugs are used to prevent tank rupture for controlled leak
situations and melt between _ to _ Fahrenheit. correct answer157
160
Ton containers have _ fusible plugs mounted on each end. correct
answer3
Exhaust fans should be ducted at _ _. correct answerfloor level
Fresh air intake are ducted at the _. correct answerceiling
_ _, _ _, _ _, _ _, and _ _ are recommended safety equipment when
working with fluoride chemicals. correct answerchemical goggles
respirator mask
rubber gloves
rubber apron
rubber boots
Use _ _ to neutralize acid spills. This chemical is also know by its
household name _ _. correct answersodium bicarbonate
baking soda
What are some potential hazards in confined spaces?
