Term
| When operating a plant that treats 1 million gallons a day how often must flow measurements be taken? |
|
Definition
|
|
Term
| What should be done to a sample that has settled solids on the bottom of a sample jar prior to testing? |
|
Definition
| Thoroughly mix the sample |
|
|
Term
| What are two ways to measure DO? |
|
Definition
|
|
Term
| What problem can be expected when a high nitrogen content is present in the plant effluent that is discharged to a stream? |
|
Definition
| Abundance in Algae Growth |
|
|
Term
| Why should a soda ash fire extinguisher never be used on an electric motor? |
|
Definition
| Harmful gases will be produced |
|
|
Term
| Water is collecting at the inlet of a clarifier what is the most probable cause? |
|
Definition
| weirs are adjusted to high |
|
|
Term
| According to dep 62 - 601 at what intervals must a flow proportioned sample be taken? |
|
Definition
|
|
Term
| What is the proper procedure when shutting down an aerated grit chamber for an extended period of time? |
|
Definition
| Divert flow, shut down blowers, lock out tag out |
|
|
Term
| Before placing a new chlorinator online what is the first thing an operator should do? |
|
Definition
|
|
Term
| What type of valve is best for use in a sludge line? |
|
Definition
|
|
Term
| What prevents water from flowing back into the inlet Channel while cleaning screens? |
|
Definition
|
|
Term
| What is the most accurate way to measure sludge age? |
|
Definition
|
|
Term
| What process will occur when solids from the plant effluent fall to the bottom of a stabilization pond? |
|
Definition
|
|
Term
| Why is excess algae growth undesirable in a pond? |
|
Definition
| It is aesthetically unpleasing |
|
|
Term
| At what temperature does a fusible plug in a chlorine cylinder melt? |
|
Definition
| 158 degrees to 162 degrees |
|
|
Term
| According to DEP rules when are discharge monitoring reports to be filed by? |
|
Definition
| The 28th day of the following month |
|
|
Term
| What do algae use to support metabolic functions? |
|
Definition
|
|
Term
| When analyzing data a proportional increase or decrease in the value is called |
|
Definition
|
|
Term
| Which manual is approved for use in determining proper lab procedures? |
|
Definition
|
|
Term
| If a pump will not start what should an operator check first? |
|
Definition
| A tripped circuit breaker |
|
|
Term
| The primary clarifier is operating properly and the trickling filter has black slime and odor what is the most probable cause of this abnormal condition? |
|
Definition
| Plugged under drain and or recirculation lines |
|
|
Term
| What can happen when a centrifugal pump is operated against a closed discharge valve? |
|
Definition
| Water will heat up from cavitation and will damage the pump |
|
|
Term
| Plant effluent samples review a high coliform count. The chlorinator is operating properly and there is a good residual. What is the most probable cause? |
|
Definition
| Short circuiting in the contact chamber |
|
|
Term
| How often should a primary clarifier be shut down for cleaning? |
|
Definition
|
|
Term
| Where should MLSS samples be taken in an aerator? |
|
Definition
| Near that effluent and one foot below the surface |
|
|
Term
| Why is Wastewater disinfected? |
|
Definition
| To reduce pathogenic bacteria to safe levels |
|
|
Term
| Why are aerobic digesters sometimes covered? |
|
Definition
| To conserve heat in colder temperatures |
|
|
Term
| Nitrogen and phosphorus removal is achieved during |
|
Definition
| Advanced secondary treatment |
|
|
Term
| Why should green sludge never be sent to the drying bed? |
|
Definition
| Poor drainability and odors |
|
|
Term
| What is the lowest concentration at which chlorine can be detected by smell? |
|
Definition
|
|
Term
| After removing sludge to a drying bed an operator should |
|
Definition
| Flush lines and leave Line open at Effluent end of bed |
|
|
Term
| How often should tanks be drained for cleaning? |
|
Definition
| Periodically to avoid disruption of process |
|
|
Term
| What is the simplest device for controlling water level? |
|
Definition
|
|
Term
| Which process involved in anaerobic digestion is most affected by pH and temperature? |
|
Definition
|
|
Term
| When pumping sludge to a digester it is best to pump |
|
Definition
| Small amounts at frequent intervals |
|
|
Term
| What is the main reason for removing grit from raw sewage during preliminary treatment? |
|
Definition
|
|
Term
| Domestic Wastewater is composed primarily of |
|
Definition
|
|
Term
| What are the four types of pollution found in Wastewater Plant effluent? |
|
Definition
| Organic-inorganic-thermal and Radioactive |
|
|
Term
| What is one disadvantage that anaerobic digesters have over aerobic digesters? |
|
Definition
|
|
Term
| Anaerobic digester gas is leaking into the atmosphere. What is the most probable cause? |
|
Definition
|
|
Term
|
Definition
| A mixture of grit and organic materials |
|
|
Term
| What provides buffering capacity in an anaerobic digester? |
|
Definition
|
|
Term
| What is one advantage of aerobic digesters have over an anaerobic digester? |
|
Definition
|
|
Term
| What should an operator not do prior to entering an anaerobic digester for cleaning? |
|
Definition
| Open all doors to remove gas and then use a lighter to make sure all the dangerous gas has been removed |
|
|
Term
| What process is used to remove chlorine from plant effluent prior to discharge into receiving Waters? |
|
Definition
|
|
Term
| What is one reason for aerating Wastewater? |
|
Definition
| To separate oil and grease |
|
|
Term
| On which part of the microscope is the slide placed? |
|
Definition
|
|
Term
| What flow through rate should be maintained in a Wastewater collection system? |
|
Definition
|
|
Term
| Clumps of sludge are floating on the surface of a digester what is the most probable cause? |
|
Definition
| Denitrification is occurring |
|
|
Term
| A dark and shiny foam is present on the surface of an aeration Basin and pin block is observed flowing over the years of the clarifier what does this indicate? |
|
Definition
|
|
Term
| What does the pH of 8.5 indicate? |
|
Definition
|
|
Term
| How many temperature ranges can an anaerobic digester be operated in? |
|
Definition
|
|
Term
| What is related to aerobic digestion? |
|
Definition
|
|
Term
| A healthy anaerobic digester will produce |
|
Definition
|
|
Term
| What could cause a false green sheen to appear on a membrane filter? |
|
Definition
|
|
Term
| What is indicated by the presence of a homogeneous billowing sludge on the surface of an aerator? |
|
Definition
| Filamentous organisms and low DO |
|
|
Term
| What is the minimum depth at a pond should be maintained at |
|
Definition
|
|
Term
| Organic matter on the bottom of a stabilization Pond will be acted on Last by the |
|
Definition
|
|
Term
| What is the first thing the operator of a rotating biological contact or should do before working on the unit? |
|
Definition
|
|
Term
| What type of sewer collect domestic Wastewater from homes? |
|
Definition
|
|
Term
| There is an increase of coliform bacteria in the plant effluent. What is one possible cause of this? |
|
Definition
| Solids build up in the chlorine ontact chamber |
|
|
Term
| What is not part of a Wastewater collection system? |
|
Definition
|
|
Term
|
Definition
| Organisms that break down organic material |
|
|
Term
| The automatic screen rake has stopped moving. What should be done first? |
|
Definition
|
|
Term
| An anaerobic digester is operating properly when the digester gas contains _____ methane |
|
Definition
|
|
Term
|
Definition
| The difference in height between two surfaces of water |
|
|
Term
| Chlorine cylinder is half full and no leaks are detected the cylinder valve is opened one complete turn and Chlorine will not feed. What is the most probable cause of the abnormal condition? |
|
Definition
| Inadequate injector vacuum |
|
|
Term
| Why should water never be put on a chlorine leak? |
|
Definition
| It will cause pipes and fittings to corrode |
|
|
Term
| When ammonia is used to check for a chlorine leak what cloud color will be produced if the leak is detected? |
|
Definition
|
|
Term
| What is the best indicator of a possible problem in an anaerobic digester? |
|
Definition
|
|
Term
| What is the proper sludge concentration from an anaerobic digester? |
|
Definition
|
|
Term
| What is the first stage of anaerobic digestion? |
|
Definition
|
|
Term
| When using two lift station pumps what is the best way to operate them? |
|
Definition
| Alternate pumps every 24 hours |
|
|
Term
| Floating solids on primary clarifier May indicate |
|
Definition
| Denitrifcation and insufficient sludge removal |
|
|
Term
| A properly operating primary clarifier will remove what percentage of suspended solids? |
|
Definition
|
|
Term
| What DO level should be maintained in anaerobic digester? |
|
Definition
| 1 - 2 milligrams per liter |
|
|
Term
| What condition may occur when a sludge pump draws too much water? |
|
Definition
|
|
Term
| A device that uses a spinning wheel to dry sludge is called a |
|
Definition
|
|
Term
| Which dangerous gases may be found at a wastewater treatment plant? |
|
Definition
|
|
Term
| What methods can be used for disposal of screenings? |
|
Definition
|
|
Term
| A settleometer reveals that after 5 to 10 minutes solids won't concentrate about 700 to 900 and settling is slow. What does this indicate? |
|
Definition
|
|
Term
| What device protects computers from Power fluctuations |
|
Definition
|
|
Term
| DEP regulations require that plant logs be |
|
Definition
| Available for inspection 24 hours a day and protected |
|
|
Term
| What is a disadvantage of effluent disposal on land? |
|
Definition
| Vector control and possibility of odors |
|
|
Term
| What is an example of preventive maintenance on gate valves? |
|
Definition
|
|
