Lift Stations Overview

Which structure can be typically used as a wet well for a submersible pump station?
1. Digester
2. Clarifier
3. Manhole
4. Large diameter pipe
What is more likely to happen when solids are removed from a wet well during a cleaning process?
1. Gases may be released as solid are disturbed
2. The wet well walls may collapse
3. The pumps will become air bound
4. The wastewater may become aerobic
What condition may happen in a wet well if the well level is too low?
1. Motor overload
2. Flooded wet well
3. Elutriation
4. Vortexing
Because gasses can typically be trapped in a wet well, they are usually classified as:
1. Non-permit confines space
2. No need for fall protection
3. Permit-required confined space
4. Only a gas detector is required
In typical wet pit/dry pit pump stations, in which section are the check valves and isolation valves located?
1. In the wet well
2. In the dry well
3. No valves are required
4. Installed on the pump suction
Which electrical device is used to automatically power the lift station pumps and components when normal power is lost and emergency power is started?
1. Pump disconnect breaker
2. Automatic transfer switch
3. Wet well level control
4. Variable frequency drive
If this were a typical two-pump station, how many pumps would be ON?
(Needs picture inserted)
1. One
2. Two
3. Both
4. None
What is the standard for motor frequency in the United States?
1. 50 Hz
2. 60 Hz
3. 70 Hz
4. 80 Hz
What system allows a pump to be connected to a motor?
1. VFD
2. SCR
3. Motor mounting
4. Motor windings
What device will disconnect the motor if excessive current is applied?
1. Automatic transfer switch
2. Power meter
3. Level control float
4. Thermal overload
Other than bubbler systems and sonic systems, what is a common device used for level indication and control?
1. Check valve
2. VFD
3. Ball float
4. Magnetic flow meter
Beside starting and stopping pumps based on level, what other feature is typically provided by ball floats?
1. Flow rate entering the wet well
2. High and low level alarms
3. Indication of pump failure
4. Thermal status of motor windings
What level device transmits a signal, and then receives a feedback, to calculate the distance from the device to the liquid level in the wet well?
1. Electrode
2. Ball float
3. Pressure transducer
4. Ultrasonic
What type of pump is typically used in most all lift and pumping stations?
1. Positive displacement
2. Rotary lobe
3. Centrifugal
4. Progressive cavity
There are two major methods of sealing the shaft from the fluid being pumped, one is standard graphite asbestos packing, what is the other?
1. Gland
2. Lantern ring
3. Grease
4. Mechanical seal
What is a common type of material used for pump shaft sleeves?
1. Wood
2. Ceramic
3. Glass
4. Titanium
What is the component within a pumping system that actually propels the wastewater forward into the pump discharge?
1. Impeller
2. Shaft
3. Seal
4. Bearings
What is considered to be the amount of energy in water based on its motion?
1. Static head
2. Friction head
3. Suction head
4. Velocity head
What does TDH stand for?
1. Total distance high
2. Total distinct hydraulics
3. Total dynamic head
4. Total durable holding
What does NPSH stand for?
1. Net positive suction head
2. No pressure so high
3. Net positive standing head
4. Net positive suction hydraulics

Lift Stations Overview

Practice QuizBrought to you free of charge by RoyCEU.com

Practice Quiz
Brought to you free of charge by RoyCEU.com