WV CLASS 2 WASTE WATER EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED!!!! ALREADY GRADED A+
Rules - (ANSWER)* a class 2 plant must have a class 2 operator on call 24 hours per day 7 days a week.
*a class 2 plant must have one certified operator in addition to the chief operator
* a class 2 plant must have a class 2 on site 40 hours per week
*Form Es-53 for certification
*renewal every 2 years with proof of 12 cehs using form EW-212 30 to 60 days prior to expiration
*exam grade is good for 2 years
* experience from non-operational jobs can only count for 600 hours toward certification
* class 2 plant will have flows of more than 1 mgd but less than or equal to 1.75 MGD
*it is up to the chief operator to applg for an OIT certification for a new hire. the owner should be able to
depend on ghe chief operator to do this.
Trickling filters - (ANSWER)*secondary treatment process
*removes more than 90% of TSS
3 most common secondary treatment processes - (ANSWER)*RBC's
*Activated sludge
*trickling filters
basic trickling filter parts - (ANSWER)*media or the retaining structure
*underdrain system
*distribution system
what does media do? - (ANSWER)provides an area for the biological slime growth develops
media requirements - (ANSWER)*filter MUST stay aerobic
*Rock size ISN'T very important but the rock should be uniform in size for adequate ventilation
*depth 3'-8' rock media
,WV CLASS 2 WASTE WATER EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED!!!! ALREADY GRADED A+
*15'-30' synthetic media
what is media made of? - (ANSWER)*Rock, Slag, Coal, Brick, redwood blocks, molded plastic.
what is one of the worst problems with a trickling filter? - (ANSWER)the deterioration of the media &'
the cost burden it puts on the owner
What are voids for? - (ANSWER)ventilation
What do void spaces in the filter media allow? - (ANSWER)Ventilation
What can cause ponding ? - (ANSWER)When voids get clogged
What is the best operational control of a trickling filter? - (ANSWER)recirculation
which recirculation rate will render good results? - (ANSWER)the lowest
what do lower recirculation rates do? - (ANSWER)save energy and cost
What are Rbc's? - (ANSWER)a suspended growth system
for nutrient removal what density media would you need? - (ANSWER)High Density Media
what do RBC's with more effective use of the media have ? - (ANSWER)A uniform growth
, WV CLASS 2 WASTE WATER EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED!!!! ALREADY GRADED A+
Disadvantages of RBC's compared to trickling filters? - (ANSWER)*no recirculation, which isn't needed
but sometimes could improve treatment, and more sensitive to industrial waste if they entered the
system.
Disinfection - (ANSWER)* the use of pipe lines in the contact chamber are very effective
*feeding chlorine is usually a lot more effective if the diffuser is at the inlet end
if the gas chlorine is too low what is it usually caused by? - (ANSWER)a dirty strainer
what do organisms compete with each other for? - (ANSWER)food
an increase in organisms will require what? - (ANSWER)more oxygen
The proper DO must be maintained so solids will? - (ANSWER)settle properly
pros of mechanical aerators? - (ANSWER)they mix better and are more energy efficient.
fine bubble diffusers - (ANSWER)Clog very easily but transfer more air
what will lack of DO cause? - (ANSWER)Filamentous Bacteria to thrive
Too much oxygen will cause? - (ANSWER)pinpoint floc
DO - (ANSWER)DO is an essential control factor
Aeration - (ANSWER)Serves a dual purpose of providing mixing and DO
100% VERIFIED!!!! ALREADY GRADED A+
Rules - (ANSWER)* a class 2 plant must have a class 2 operator on call 24 hours per day 7 days a week.
*a class 2 plant must have one certified operator in addition to the chief operator
* a class 2 plant must have a class 2 on site 40 hours per week
*Form Es-53 for certification
*renewal every 2 years with proof of 12 cehs using form EW-212 30 to 60 days prior to expiration
*exam grade is good for 2 years
* experience from non-operational jobs can only count for 600 hours toward certification
* class 2 plant will have flows of more than 1 mgd but less than or equal to 1.75 MGD
*it is up to the chief operator to applg for an OIT certification for a new hire. the owner should be able to
depend on ghe chief operator to do this.
Trickling filters - (ANSWER)*secondary treatment process
*removes more than 90% of TSS
3 most common secondary treatment processes - (ANSWER)*RBC's
*Activated sludge
*trickling filters
basic trickling filter parts - (ANSWER)*media or the retaining structure
*underdrain system
*distribution system
what does media do? - (ANSWER)provides an area for the biological slime growth develops
media requirements - (ANSWER)*filter MUST stay aerobic
*Rock size ISN'T very important but the rock should be uniform in size for adequate ventilation
*depth 3'-8' rock media
,WV CLASS 2 WASTE WATER EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED!!!! ALREADY GRADED A+
*15'-30' synthetic media
what is media made of? - (ANSWER)*Rock, Slag, Coal, Brick, redwood blocks, molded plastic.
what is one of the worst problems with a trickling filter? - (ANSWER)the deterioration of the media &'
the cost burden it puts on the owner
What are voids for? - (ANSWER)ventilation
What do void spaces in the filter media allow? - (ANSWER)Ventilation
What can cause ponding ? - (ANSWER)When voids get clogged
What is the best operational control of a trickling filter? - (ANSWER)recirculation
which recirculation rate will render good results? - (ANSWER)the lowest
what do lower recirculation rates do? - (ANSWER)save energy and cost
What are Rbc's? - (ANSWER)a suspended growth system
for nutrient removal what density media would you need? - (ANSWER)High Density Media
what do RBC's with more effective use of the media have ? - (ANSWER)A uniform growth
, WV CLASS 2 WASTE WATER EXAM WITH COMPLETE SOLUTIONS
100% VERIFIED!!!! ALREADY GRADED A+
Disadvantages of RBC's compared to trickling filters? - (ANSWER)*no recirculation, which isn't needed
but sometimes could improve treatment, and more sensitive to industrial waste if they entered the
system.
Disinfection - (ANSWER)* the use of pipe lines in the contact chamber are very effective
*feeding chlorine is usually a lot more effective if the diffuser is at the inlet end
if the gas chlorine is too low what is it usually caused by? - (ANSWER)a dirty strainer
what do organisms compete with each other for? - (ANSWER)food
an increase in organisms will require what? - (ANSWER)more oxygen
The proper DO must be maintained so solids will? - (ANSWER)settle properly
pros of mechanical aerators? - (ANSWER)they mix better and are more energy efficient.
fine bubble diffusers - (ANSWER)Clog very easily but transfer more air
what will lack of DO cause? - (ANSWER)Filamentous Bacteria to thrive
Too much oxygen will cause? - (ANSWER)pinpoint floc
DO - (ANSWER)DO is an essential control factor
Aeration - (ANSWER)Serves a dual purpose of providing mixing and DO
