Adem Wastewater Grade 3 Exam Questions with Verified Answers| Latest Update Graded A+
How many persons are required to enter a manhole? 3
If the volatile acids/alkalinity ratio is increasing and the pH is dropping, which of the following
should be done? Decrease the raw sludge feed to the that digester
To permit proper flow of chlorine from a container rotate the valve stem in a counter clockwise
direction One turn
Return activated sludge flow rate may be adjusted or controlled by which of the following?
SVI approach
A plant operated at a longer MCRT of _____ effluent
days will produce a nitrified 15-20
The primary element in a control system is also called a sensor
Denitrification in the secondary clarifier in an activated sludge system indicates: Sludge
withdrawal is too slow
A Sludge blanket depths may be measured by the use of Ultrasonic transmitters and
receivers
When collecting a fecal sample, it should be A grab sample preserved with sodium
thiosulfate
The presence of white pillowing foam on an aeration tank indicates The aeration tank is
underloaded organically
, The correct amount of chemical used to remove turbidity is known as the Optimum dosage
The optimum temperature for composting is between 130-140°F
In order to get coagulation to proceed, a chemical change process must occur which is called.
Precipitation
What is the correct compound for Alum? Al2 (SO4)3
Operators must be very careful whenever strongly acidic and basic solutions are mixed because
of the potential for Generation of heat
Production of toxic gases
Splattering of the mixture
Precipitation of heavy metals
All of the above
A jar test can be used to determine The most economical coagulation dosage
What is the one invariable requirement in all jar test procedures? Test conditions should
match actual plant conditions
In the membrane filter method, the number of coliforms is estimated by the Number of
colonies grown
Clarifier efficiency is determined using Influent and effluent 24-hour composite samples
Generally speaking, phosphorus levels in wastewater have dropped due to Phosphate
detergent ban
How many persons are required to enter a manhole? 3
If the volatile acids/alkalinity ratio is increasing and the pH is dropping, which of the following
should be done? Decrease the raw sludge feed to the that digester
To permit proper flow of chlorine from a container rotate the valve stem in a counter clockwise
direction One turn
Return activated sludge flow rate may be adjusted or controlled by which of the following?
SVI approach
A plant operated at a longer MCRT of _____ effluent
days will produce a nitrified 15-20
The primary element in a control system is also called a sensor
Denitrification in the secondary clarifier in an activated sludge system indicates: Sludge
withdrawal is too slow
A Sludge blanket depths may be measured by the use of Ultrasonic transmitters and
receivers
When collecting a fecal sample, it should be A grab sample preserved with sodium
thiosulfate
The presence of white pillowing foam on an aeration tank indicates The aeration tank is
underloaded organically
, The correct amount of chemical used to remove turbidity is known as the Optimum dosage
The optimum temperature for composting is between 130-140°F
In order to get coagulation to proceed, a chemical change process must occur which is called.
Precipitation
What is the correct compound for Alum? Al2 (SO4)3
Operators must be very careful whenever strongly acidic and basic solutions are mixed because
of the potential for Generation of heat
Production of toxic gases
Splattering of the mixture
Precipitation of heavy metals
All of the above
A jar test can be used to determine The most economical coagulation dosage
What is the one invariable requirement in all jar test procedures? Test conditions should
match actual plant conditions
In the membrane filter method, the number of coliforms is estimated by the Number of
colonies grown
Clarifier efficiency is determined using Influent and effluent 24-hour composite samples
Generally speaking, phosphorus levels in wastewater have dropped due to Phosphate
detergent ban
