CWEA Exam Correctly Answered
What precautions should be taken for a chemical with a high flammability hazard?
- ✅✅ Keep them stored in approved containers, keep emergency extinguishing
agents on hand when handling and near them in storage
What are some examples of toxic chemicals? - ✅✅ disinfectants, insect
repellent, antifreeze, ammonia, mothballs, motor oils, rat poison, windshield wiper
fluid, weed killers
What factors create a reactivity hazard? - ✅✅ peroxide-forming chemicals,
water-reactive chemicals, self-reactive chemicals, incompatibility.
What is corrosivity? - ✅✅ chemicals that can cause tissue damage (permanent
bodily harm to the skin, eyes or respiratory tract)
What are the routes of exposure for chemicals? - ✅✅ Inhalation, injection,
absorption, ingestion
What are the characteristics of a permit required confined space? - ✅✅ A
possibly Hazardous Atmosphere, the possibility of Engulfment, Internal
Configuration that could trap and asphyxiate an entrant, contains any other
recognized health hazard
,What is the difference between 25% oxygen and 100% oxygen? - ✅✅ Neither
are suitable for work, but 25% is an increased fire risk and 100% can cause brain
damage
What are all 7 steps of LOTO procedure? - ✅✅ 1. Identify potential hazards
2. Notify all affected employees
3. Turn off/disable/isolate controls
4. Lock out all energy control switched (sign and date)
5. Test by turning on controls and accounting for personnel before the safety test
6. Turn control to off
7. Perform task (when complete, only the person who tagged out may remove the
lock and tag)
What is the difference between a trench and an excavation? - ✅✅ A trench is an
excavation! Trenches specifically are deeper than they are wide, have a bottom
width of 15 feet or less and have a higher potential for wall cave in. Excavations
are any man-made work-related functions affected by earth removal or disturbance
(i.e. Cuts, trenches or depressions)
What is the "pipe zone" in the trench? - ✅✅ the portion of the excavation where
the pipe is located.
What is the "haunch zone" of an excavation? - ✅✅ Either side of the arched
section in the bottom half of the pipe
Why are gasoline and volatile solvents objectionable when present in a sewer? -
✅✅ They produce an explosion hazard
, You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless - ✅✅ You know what you
are doing, are qualified and are authorized
What are the different areas of traffic zones? - ✅✅ Advance Warning Area,
Transition Area, Activity Area (buffer space and work space), Termination Area.
Why should hydrogen sulfide be controlled? - ✅✅ to protect from corrosion and
odors
Personnel entering a Permit Required Confined Space must have the following
training - ✅✅ entry and rescue
To find protective gear before application of a product, you should: - ✅✅ look at
the MSDS
The gas most commonly associated with septic wastewater is? - ✅✅ Hydrogen
Sulfide
The lack of an unpleasant odor in a manhole, lift station or other structures does
not always mean that dangerous gases are not present because? - ✅✅ some
dangerous gases are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - ✅✅
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
What does the "transition area" mean in traffic control? - ✅✅ It moves traffic out
of its normal path
What precautions should be taken for a chemical with a high flammability hazard?
- ✅✅ Keep them stored in approved containers, keep emergency extinguishing
agents on hand when handling and near them in storage
What are some examples of toxic chemicals? - ✅✅ disinfectants, insect
repellent, antifreeze, ammonia, mothballs, motor oils, rat poison, windshield wiper
fluid, weed killers
What factors create a reactivity hazard? - ✅✅ peroxide-forming chemicals,
water-reactive chemicals, self-reactive chemicals, incompatibility.
What is corrosivity? - ✅✅ chemicals that can cause tissue damage (permanent
bodily harm to the skin, eyes or respiratory tract)
What are the routes of exposure for chemicals? - ✅✅ Inhalation, injection,
absorption, ingestion
What are the characteristics of a permit required confined space? - ✅✅ A
possibly Hazardous Atmosphere, the possibility of Engulfment, Internal
Configuration that could trap and asphyxiate an entrant, contains any other
recognized health hazard
,What is the difference between 25% oxygen and 100% oxygen? - ✅✅ Neither
are suitable for work, but 25% is an increased fire risk and 100% can cause brain
damage
What are all 7 steps of LOTO procedure? - ✅✅ 1. Identify potential hazards
2. Notify all affected employees
3. Turn off/disable/isolate controls
4. Lock out all energy control switched (sign and date)
5. Test by turning on controls and accounting for personnel before the safety test
6. Turn control to off
7. Perform task (when complete, only the person who tagged out may remove the
lock and tag)
What is the difference between a trench and an excavation? - ✅✅ A trench is an
excavation! Trenches specifically are deeper than they are wide, have a bottom
width of 15 feet or less and have a higher potential for wall cave in. Excavations
are any man-made work-related functions affected by earth removal or disturbance
(i.e. Cuts, trenches or depressions)
What is the "pipe zone" in the trench? - ✅✅ the portion of the excavation where
the pipe is located.
What is the "haunch zone" of an excavation? - ✅✅ Either side of the arched
section in the bottom half of the pipe
Why are gasoline and volatile solvents objectionable when present in a sewer? -
✅✅ They produce an explosion hazard
, You should never attempt to install, maintain, repair or replace electrical
equipment panels, controls, wiring or circuits unless - ✅✅ You know what you
are doing, are qualified and are authorized
What are the different areas of traffic zones? - ✅✅ Advance Warning Area,
Transition Area, Activity Area (buffer space and work space), Termination Area.
Why should hydrogen sulfide be controlled? - ✅✅ to protect from corrosion and
odors
Personnel entering a Permit Required Confined Space must have the following
training - ✅✅ entry and rescue
To find protective gear before application of a product, you should: - ✅✅ look at
the MSDS
The gas most commonly associated with septic wastewater is? - ✅✅ Hydrogen
Sulfide
The lack of an unpleasant odor in a manhole, lift station or other structures does
not always mean that dangerous gases are not present because? - ✅✅ some
dangerous gases are odorless (for example, carbon monoxide)
What are the four conditions necessary to create an explosion? - ✅✅
combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen
What does the "transition area" mean in traffic control? - ✅✅ It moves traffic out
of its normal path
