COLORADO WASTEWATER TREATMENT OPERATOR
CLASS D EXAMINATION ACTUAL FINAL EXAM
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST VERSION!!
What turns consumers clothes black? - ANSWER--High
amount of Manganese
What % of oxygen is needed in confined spaces? -
ANSWER--19.5%
What is sodium hypochlorite? - ANSWER--Bleach, it
disinfects water.
,Which type of filter do you skim, not backwash? -
ANSWER--Cartridge Filters
What is used to detect chlorine gas leaks? - ANSWER--
10% solution of ammonia hydroxide
Powered activated carbon is usually used to control what?
- ANSWER--Organic Compounds Responsible for Tastes
and Odors
All chlorine gas rooms... - ANSWER--Should have a
window in the door so an operator can look into the room
to detect any abnormal conditions
, Post sedimentation process, the turbidity of settled water
before it is applied to the filters should be kept below? -
ANSWER--1-2 NTU
By what factor does the hydrogen ion concentration
change when the pH changes from 8.0 to 9.0? -
ANSWER--10
A 50% solution of caustic soda will begin to crystallize if
the temperature drops below? - ANSWER--54 F
If the water temperature decreases this will cause the
disinfection action of chlorine to? - ANSWER--Decrease
CLASS D EXAMINATION ACTUAL FINAL EXAM
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST VERSION!!
What turns consumers clothes black? - ANSWER--High
amount of Manganese
What % of oxygen is needed in confined spaces? -
ANSWER--19.5%
What is sodium hypochlorite? - ANSWER--Bleach, it
disinfects water.
,Which type of filter do you skim, not backwash? -
ANSWER--Cartridge Filters
What is used to detect chlorine gas leaks? - ANSWER--
10% solution of ammonia hydroxide
Powered activated carbon is usually used to control what?
- ANSWER--Organic Compounds Responsible for Tastes
and Odors
All chlorine gas rooms... - ANSWER--Should have a
window in the door so an operator can look into the room
to detect any abnormal conditions
, Post sedimentation process, the turbidity of settled water
before it is applied to the filters should be kept below? -
ANSWER--1-2 NTU
By what factor does the hydrogen ion concentration
change when the pH changes from 8.0 to 9.0? -
ANSWER--10
A 50% solution of caustic soda will begin to crystallize if
the temperature drops below? - ANSWER--54 F
If the water temperature decreases this will cause the
disinfection action of chlorine to? - ANSWER--Decrease
