Physical Chemical Waste Water Grade 1 Practice Exam

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• Oil and grease samples are what type of samples?
• Which industry generally produces the most wastewater?
• What is the most important factor used to determine the number of samples to collect?
• If a pump's flexible coupling is very noisy at startup, which issue could be the cause?
• Which statement correctly describes the safe operating condition for a pump?
• Which statement best describes reproducible test results?
• Which pump is most commonly used for pumping activated carbon slurry?
• The process by which algae and plants release oxygen is called which?
• Which process causes oil droplets to merge into larger droplets during treatment?
• Clarifier short-circuiting can be caused by differences in water density due to differences in what conditions?
• In the event of an ORC vacating a position, which entity must receive notification?
• In the context of ash basins, which statement is true?
• What is the correct order of the three most common atmospheric tests?
• Which material is cited as a suitable medium for coalescing oil droplets?
• What does the settable solids test evaluate?
• Which sealing technology is gaining popularity because packing requires more frequent changing?
• DAF is used to remove which substances from wastewater?
• Which step in the regeneration process uses water to float carbon fines created by the heat treatment?
• By what date must the application for the operator examination be postmarked?
• In the standard order of the atmospheric tests, which test is performed first?
• Oil globule size is commonly expressed in which unit?
• Which statement about temperature and dissolved oxygen is correct?
• Which of the following is a method for protecting groundwater monitoring wells?
• The three main ingredients for an ordinary fire are:
• If an operator violates permit conditions, what is the maximum daily fine per violation?
• Which factor most directly affects the rate of sedimentation in a basin?
• Which treatment is not a physical treatment?
• Usually, what is the relationship between compression ratio and engine efficiency?
• Which set correctly lists the four routes of entry into the body?
• How should the joints in the rings of a pump packing be arranged?
• Canals in ash basins can increase sedimentation by which mechanism?
• What aids in increasing the efficiency of oil/water separators?
• Groundwater monitoring wells are __ sampled for residual chlorine.
• Waste discharge requirements depend on which of the following metrics?
• Which term describes a practice used by industry to reduce the quality of waste?
• Pressure drop in a pipeline may be due to which factors?
• What is considered the best approach to managing wastewater in industry?
• Which is a typical problem associated with ash basin operations?
• Which container is used for oil and grease samples?
• Three separate methods of solids removal from a physical chemical industrial process are:
• Which statement best describes the effect of increasing roughness on the internal surface of pipes?
• Which option is not recommended for Doppler ultrasonic meters?
• Which process is responsible for oxygen production in aquatic plants?
• Oil rising velocity in separation processes is affected by what property of the oil globules?
• If water samples are filtered before analysis, how should the results be noted?
• A tachometer measures engine ___.
• Carbon column reactors are usually lined with epoxy or resin. Which option represents this lining material?
• Canals in ash basins affect sedimentation by which mechanism?
• What does NPDES stand for?
• Facility owners must keep a copy of all DMRs for how long?
• Applications for NPDES permit renewals are required how many days before the permit expires?
• As water passes through the throat of a weir, the water is described as?
• A valve condition that can cause backflow through a pump is described as which of the following?
• When an ORC or back-up ORC vacates a position, they must notify the commission and the regional office within how many days?
• Gravity separators rely on which property difference to separate oil from water?
• Short-circuiting affects a clarifier's _______.
• The use of diffused air to accelerate the formation of oil and grease scum is called which process?
• Which technique is commonly used to remove oil from wastewater using air flotation?
• Which of the following is not a physical treatment?
• As temperature goes up, which goes down?
• What effect does a coalescing medium have on oil globules?
• Flow meters must be calibrated how often?
• Production equipment wash-down is NOT considered a dilution stream.
• Which meters are NOT recommended for clean liquids?
• Which option is NOT one of the four routes of entry into the body?
• Total discharge head includes which type of head?
• Dissolved air flotation (DAF) is used to remove which substances from wastewater?
• Which pH range is allowed in NC NPDES permits?
• What is the pH limit for NPDES permits in North Carolina?
• Which condition should never be present when operating a positive displacement pump?
• In open channel flow metering, the primary element is a _______.
• Which component is essential in a centrifugal pump to impart energy to the fluid?
• Waste discharge requirements are calculated on a mass basis dependent on which factor?
• Which type of valve is designed to be either in an open or closed position to prevent backflow?
• Which test typically yields results more quickly than the BOD test?
• What maintenance action is recommended for check valves and control valves on a flotation unit?
• What is the major difference between reverse osmosis and ultra-filtration processes?
• Which unit relies primarily on gravity to settle solids out of wastewater?
• Samples taken for routine analysis should be preserved by?
• What regulation sets standards for the safe handling and use of sewage sludge?
• A certified operator must notify the commission of a change in address within how many days?
• What is a common effect of clarifier short-circuiting?
• A propeller type flow meter is NOT recommended for WWTP because of _______.
• Which statement correctly describes the consequences for operator record falsification?
• On a flotation unit, what maintenance action should be performed on check valves and control valves to prevent failure?
• Which option correctly expands the acronym BOD?
• In a DAF system, the air present in the pressurized water is best described as which form?
• Which option correctly states the retention period for DMR copies kept by facility owners?
• When sizing standby power, which guideline is recommended?
• As the impeller wears, what happens to the pump efficiency?
• Label requirement on groundwater monitoring wells includes
• A practice used in industry to reduce the quality of industrial waste is which of the following?
• Which statement describes the relationship between particle density and settling rate in gravity settling?
• In gravity settling, heavier particles settle at what rate compared to lighter particles?
• Which is a part of a centrifugal pump?
• What is one clear advantage of a vertical flow clarifier related to solids?
• The higher compression ratio leads to greater efficiency.
• Where should the smallest particles be expected to settle within the average detention time in a sedimentation tank?
• When sizing standby power, which criterion is used to determine generator size?
• Turbidity is the measure of which property?
• Which statement best defines the metric used for wastewater discharge calculations in ash basins?
• A common description of ash basin concerns includes which of the following?
• Which statement best describes the flow at the throat of a weir?
• A practice used by industry to reduce the quality of waste is _____
• A ___ _____ ______ provides power with each revolution of the crankshaft.
• Which pump type is most commonly used for pumping activated carbon slurry?
• Upstream of a flume the water is typically described as:
• Which option correctly expands the acronym NPDES?
• The ability of activated carbon to absorb a contaminant depends on which factors?
• Which test is used to estimate the chemical oxygen demand?
• The term DO stands for which measurement in water testing?
• Which statement correctly describes DMR submission timing?
• Gravity separators are used to remove which from wastewater?
• Velocity may be sensed by which combination of methods?
• When a sample is tested repeatedly, the precision of the test is related to which concept?
• What is the name of the basic method of checking flow metering systems that relies on comparing water depths at different locations?
• Which parameter measures water clarity and suspended solids content?
• What is the effect on settling velocity as temperature increases?
• Is a contact person for violations required to be recorded for each sample collected?
• The state in which a substance exists is generally controlled by which factor?
• The inlet to a pump is generally called the?
• Intentional falsification of records by an operator can result in:
• Wear rings on a pump are intended to wear on which part?
• Which of the following is a direct result of impeller wear?
• Which of the following does NOT enhance the longevity of a carbon contactor?
• Typical untreated wastewater is slightly ____
• Which type of sampling is used to collect oil and grease samples?
• Which items should appear on a groundwater monitoring well?
• In ash basins, how does retention time affect sedimentation?
• Canals within ash basins increase sedimentation by increasing which factor?
• Which engine type provides power with every revolution of the crankshaft?
• The primary purpose of a multiple hearth furnace when used with carbon adsorption is to ______ ___ _____ ______ adhering to the spent carbon.
• What performance aspect is most directly affected by impeller wear?
• Which valve condition can cause backflow through a pump, potentially reversing the shaft?
• Which item is listed as not part of a hazard communication program?
• A dissolved air flotation (DAF) system uses pressurized water containing what form of air to aid flotation?
• Which of the following is NOT considered a problem in the textile industry?
• One purpose of activated carbon in industrial wastewater treatment is the removal of what?
• How long do you have to report a bypass to DWR?
• Gravity-based separators primarily remove free oil by exploiting which property difference?
• Which factor makes a propeller type flow meter unsuitable for WWTP?
• Upstream of a flume the water is _______.
• When calibrating a flow meter using the Timed Volumetric Method, the process should be repeated how many times and then averaged?
• Which statement about mg/L and ppm is true?
• In adsorption by activated carbon, which of the following is not a primary factor influencing adsorption?
• Which option correctly expands the acronym NPDES?
• What is one of the basic methods for checking flow metering systems?
• Which condition would NOT typically be reviewed in a carbon absorption process?
• Which pump component concentrates wear on an economically replaceable part?
• An advantage of gravity settling over pressure flotation is that it requires less what?
• An API separator is commonly used as a first-stage oil removal unit in wastewater treatment. Which option best matches this description?
• What is the effect of increased roughness on the carrying capacity of pipes?
• Typical problems associated with ash basin operations involve which contaminants?
• Which pump type is best for deep well irrigation where the intake is below liquid levels?
• If a water sample measures 2 mg/L, what is the equivalent concentration in ppm?
• Oil and grease can cause interference with which sensor?
• 1 mg/L is equal to which of the following?
• A back-up ORC may fill in for a missing ORC for not more than how many consecutive days?
• In pump terminology, what is the term for the inlet side where fluid enters the pump?
• Where should the DO test be performed?
• Emulsions of oil and water can be caused by which means?
• Which option would be considered the primary approach to reducing wastewater impacts?
• DMRs must be submitted within how many days following the end of the calendar month?
• Waste discharge requirements are based on mass of pollutant per unit volume of which medium?
• Nitrate, nitrogen, bacteria, and viruses are potential health hazards from a drinking water well near an improperly functioning subsurface wastewater system.
• What is the main disadvantage of using a flume compared to a weir?
• To minimize leakage between joints in a pump packing, which arrangement is recommended?
• What is the primary purpose of a surge tank in a pumping system?
• Which test uses the Imhoff cone?
• In a properly operated sedimentation tank, the smallest particles are expected to settle toward which part of the tank within the detention time?
• The purpose of an engine governor is to provide ______ regardless of the load.
• Nitrate, nitrogen, bacteria, and viruses are potential _____ from a drinking water well near an improperly functioning subsurface wastewater system.
• What does BOD stand for?
• Mean Cell Residence Time (MCRT) does NOT affect the operation of which unit?
• Mechanical seals should not ____.
• The settling velocity of a particle is affected by which of the following factors?
• Which device’s readings would be affected by oil and grease in wastewater?
• Which set of controls is essential for optimizing DAF unit performance?
• Which apparatus is used for the settable solids test?
• Short-circuiting in a clarifier can be corrected by installing which components?
• An increase in engine cooling and water temperature indicates which of the following?
• Oil and grease must be removed from industrial wastewater to prevent what in sewers?
• In ash basin operations, which pollutants are commonly involved?
• Stokes' law applies to particles that are doing what?
• If there is a vacancy in the ORC (Operator Responsible Charge) or back-up ORC, the system owner must designate a new ORC within how many days?
• ______ is not an element of a hazard communication program
• Which of the following best represents the basis for calculating waste discharge requirements?
• Which of the following is NOT listed as a ground for suspending or revoking a wastewater treatment plant operator's license?
• Which term describes the process used to reduce the quality of industrial waste?
• In Timed Volumetric Method calibration, the final flow value is obtained by?
• If detention time is less than the solids settling rate, what is the likely effect on effluent quality?