Wastewater Collections Grade 1 Final Exam
What device is used during sewer excavation to protect A) Trench box
workers an consist of portable rectangular box open at?
A) Trench box
B) Solid sleeting
C) bucket box
D) Frame shoring
When entering a manual, ventilation shall be procured? B) Anytime a manhole is entered
A) Only before entering
B) Anytime a manhole is entered
C) Only after leaving
D) only when explosive atmospheres are present
What should a collection system operator know in order D) How to identify problems, causes, and potential solutions
to troubleshoot?
A) How to correct process operator problems
B) How to correct equipment operational problems
C) How to prevent process operational problems
D) How to identify problems, causes, and potential
solutions
Evidence of a chlorine leak can be detected by? D) Green or reddish deposits on material
A) checking the leak gauge
B) An explosimeter
C) Spring water on suspected leaks
D) Green or reddish deposits on material
A pump that operates continuously needs to be A) Daily
inspected for cleanliness and leakage?
A) Daily
B) Weekly
C) Monthly
D) Yearly
In a pressure sensing controller, for every foot water A) 0.433 psi per foot
rises in a wet well, how much psi air will be required to
overcome the water pressure?
A) 0.433 psi per foot
B) 0.866 psi per foot
C) 7.480 psi per foot
D) 8.340 psi per foot
Which of the following is required for the maintenance of C) Proper alignment
couplings between the driving and driven elements?
A) Proper tuning
B) Proper Curvature
C) Proper alignment
D) Proper moisture draining
Check valves are used to? C) Permit flow in only one direction
A) Stop flow in both directions
B) Regulate velocity
C) Permit flow in only one direction
D) Permit air to escape from the pipe
What common error in maintenance of bearings cause B) Overlubricating the bearings
heat problems?
A) Lubricating the pump while it is not running
B) Overlubricating the bearings
C) Lubricating on the wrong day
D) Lubricating on the same day of the week
How is the rate of air from the ventilation blower normally A) Cubic feet per minute
measured?
A) Cubic feet per minute
B) Milligrams per liter
C) Feet per minute
D) Grains per gallon
, Wastewater Collections Grade 1 Final Exam
So electric motors in a facility are three phase powered B) Slower and heat up
with no phase protection- if one phase was interrupted
the motor would run?
A) Faster and cooler
B) Slower and heat up
C) Slower and cooler
D) Faster and heat up
What is the purpose of forced draft ventilation in a lift A) Remove dangerous gases
station?
A) Remove dangerous gases
B) Prevent odors
C) Keep the air pressure equalized
D) Cool the pump
Inorganic solids in wastewater are? B) Inert and not subject to decay
A) Mostly floatable solids
B) Inert and not subject to decay
C) Generally, of animals and vegetables organic
D) Mostly dissolved solids
What should be checked as a part of the maintenance B) Float cleanliness
required for a lift station float control?
A) Probe
B) Float cleanliness
C) Power supply
D) Air tube
Enclosed open and semi closed are terms that were B) Impellers
designated and selection of?
A) Stuffing box
B) Impellers
C) Lantern rings
D) Sleeves
Accidental spills can be reduced and prevented by? B) Allowing only authorized persons to operate valves
A) Starting a volume reduction program
B) Allowing only authorized persons to operate valves
C) Having operators keep waste segregated
D) Implementing a strength reduction program
What is the most important purpose of a fuse or circuit B) To protect electrical equipment
breaker in an electric unit?
A) To disconnect the system when it is not in use
B) To protect electrical equipment
C) To regulate current flow in the circuit
D) To increase the current carrying capacity of the circuit
If the float on the rotameter is a ball an operator should A) Center of the ball
read across the?
A) Center of the ball
B) Bottom of the ball
C) Top of the ball
Why should operator use an air gap device? C) To prevent backflow of wastewater into drinking water supply
A) To ventilate pump station
B) To prevent excessive vibration in pipe joint
C) To prevent backflow of wastewater into drinking water
supply
D) To increase oxygen content in the water
In order to comply with safety regulations, all couplings C) Guarded
must be?
A) Tight
B) Able to rotate freely
C) Guarded
D) Properly aligned
What device is used during sewer excavation to protect A) Trench box
workers an consist of portable rectangular box open at?
A) Trench box
B) Solid sleeting
C) bucket box
D) Frame shoring
When entering a manual, ventilation shall be procured? B) Anytime a manhole is entered
A) Only before entering
B) Anytime a manhole is entered
C) Only after leaving
D) only when explosive atmospheres are present
What should a collection system operator know in order D) How to identify problems, causes, and potential solutions
to troubleshoot?
A) How to correct process operator problems
B) How to correct equipment operational problems
C) How to prevent process operational problems
D) How to identify problems, causes, and potential
solutions
Evidence of a chlorine leak can be detected by? D) Green or reddish deposits on material
A) checking the leak gauge
B) An explosimeter
C) Spring water on suspected leaks
D) Green or reddish deposits on material
A pump that operates continuously needs to be A) Daily
inspected for cleanliness and leakage?
A) Daily
B) Weekly
C) Monthly
D) Yearly
In a pressure sensing controller, for every foot water A) 0.433 psi per foot
rises in a wet well, how much psi air will be required to
overcome the water pressure?
A) 0.433 psi per foot
B) 0.866 psi per foot
C) 7.480 psi per foot
D) 8.340 psi per foot
Which of the following is required for the maintenance of C) Proper alignment
couplings between the driving and driven elements?
A) Proper tuning
B) Proper Curvature
C) Proper alignment
D) Proper moisture draining
Check valves are used to? C) Permit flow in only one direction
A) Stop flow in both directions
B) Regulate velocity
C) Permit flow in only one direction
D) Permit air to escape from the pipe
What common error in maintenance of bearings cause B) Overlubricating the bearings
heat problems?
A) Lubricating the pump while it is not running
B) Overlubricating the bearings
C) Lubricating on the wrong day
D) Lubricating on the same day of the week
How is the rate of air from the ventilation blower normally A) Cubic feet per minute
measured?
A) Cubic feet per minute
B) Milligrams per liter
C) Feet per minute
D) Grains per gallon
, Wastewater Collections Grade 1 Final Exam
So electric motors in a facility are three phase powered B) Slower and heat up
with no phase protection- if one phase was interrupted
the motor would run?
A) Faster and cooler
B) Slower and heat up
C) Slower and cooler
D) Faster and heat up
What is the purpose of forced draft ventilation in a lift A) Remove dangerous gases
station?
A) Remove dangerous gases
B) Prevent odors
C) Keep the air pressure equalized
D) Cool the pump
Inorganic solids in wastewater are? B) Inert and not subject to decay
A) Mostly floatable solids
B) Inert and not subject to decay
C) Generally, of animals and vegetables organic
D) Mostly dissolved solids
What should be checked as a part of the maintenance B) Float cleanliness
required for a lift station float control?
A) Probe
B) Float cleanliness
C) Power supply
D) Air tube
Enclosed open and semi closed are terms that were B) Impellers
designated and selection of?
A) Stuffing box
B) Impellers
C) Lantern rings
D) Sleeves
Accidental spills can be reduced and prevented by? B) Allowing only authorized persons to operate valves
A) Starting a volume reduction program
B) Allowing only authorized persons to operate valves
C) Having operators keep waste segregated
D) Implementing a strength reduction program
What is the most important purpose of a fuse or circuit B) To protect electrical equipment
breaker in an electric unit?
A) To disconnect the system when it is not in use
B) To protect electrical equipment
C) To regulate current flow in the circuit
D) To increase the current carrying capacity of the circuit
If the float on the rotameter is a ball an operator should A) Center of the ball
read across the?
A) Center of the ball
B) Bottom of the ball
C) Top of the ball
Why should operator use an air gap device? C) To prevent backflow of wastewater into drinking water supply
A) To ventilate pump station
B) To prevent excessive vibration in pipe joint
C) To prevent backflow of wastewater into drinking water
supply
D) To increase oxygen content in the water
In order to comply with safety regulations, all couplings C) Guarded
must be?
A) Tight
B) Able to rotate freely
C) Guarded
D) Properly aligned
