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ABC Wastewater collection Level 3
Which one of the following provides a profile of hazardous substances or mixtures? A. Occupational Safety and Health Administration (OSHA) B. Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) C. Code of Federal Regulations (CFR) D. material safety data sheet (MSDS) - ✔ ✔ D. material safety data sheet (MSDS) An atmosphere is defined as oxygen deficient if it contains less than what percent oxygen by volume? A. 16.5% B. 18.5% C. 19.5% D. 19.8% - ✔ ✔ C. 19.5% What class of fire involves sodium and magnesium? A. Class A B. Class B C. Class C
D. Class D - ✔ ✔ D. Class D The specific gravity standard for gases is A. water vapor at 100°C B. air C. oxygen D. nitrogen - ✔ ✔ B. air Electrical units operating in areas exposed to flammable vapors should A. be removed and reinstalled in a separate room B. be housed in a tightly sealed container C. be double-insulated D. be explosion-proof - ✔ ✔ D. be explosion-proof Word has just come down from the top that operating funds are being cut. How should this be handled? A. cut the supplies and repairs in order to balance the budget B. fire some of the less-productive old employees C. keep it quiet and do what you have to do--"The less said the better" D. let the other personnel know what the situation is and ask for their help - ✔ ✔ D. let the other personnel know what the situation is and ask for their help
B. encourage because it promotes good fellowship C. permitted as it is a form of relaxation D. stopped immediately because it is likely to cause an accident - ✔ ✔ D. stopped immediately because it is likely to cause an accident The gas most commonly associated with fresh wastewater is A. carbon dioxide B. carbon monoxide C. hydrogen sulfide D. oxygen - ✔ ✔ D. oxygen The electrical disconnect for a pumping station motor can trip out under which one(s) of the following possibilities? A. clogged pump inlet B. low temperature C. strike by lightning D. worn packing - ✔ ✔ C. strike by lightning One of the electric motors in the facility has overheated and caught fire. Select the correct sequence of steps you would take.
- extinguish fire
- test
- repair
- shut off power
- remove tags and locks
- ascertain cause
- tag and lock out power A. 1, 2, 6, 4, 7, 3, 5 B. 1, 4, 6, 7, 2, 3, 5 C. 4, 1, 7, 6, 3, 5, 2 D. 4, 6, 1, 7, 3, 5, 2 - ✔ ✔ C. 4, 1, 7, 6, 3, 5, 2 Pipe materials that are the least susceptible to corrosion by acids formed from gases generated in sewers are A. ACP B. CIP C. RCP D. VCP - ✔ ✔ D. VCP The level of water can be measured by A. bubblers B. electrical probes C. floats D. all of the above - ✔ ✔ D. all of the above At a pumping station equipped with centrifugal pumps, what caused the discharge pressure to suddenly increase and the discharge quantity to suddenly decrease?
What is the greatest distance at which manholes should be installed for an 8-inch sewer line? A. 100 feet B. 200 feet C. 300 feet D. 400 feet - ✔ ✔ C. 300 feet Disaster planning is A. having manuals ready so they can be read if a disaster occurs B. something that, if properly done, will not need to be revised C. useful in reducing confusion in the event of a disaster D. none of the above - ✔ ✔ C. useful in reducing confusion in the event of a disaster The best discipline is A. authoritarian B. general supervisory C. self-discipline D. theocratic - ✔ ✔ C. self-discipline Staffing a new system should be viewed primarily as the function of A. every operator B. personnel department
C. the employee D. the supervisory management - ✔ ✔ D. the supervisory management Organization charts are helpful to show A. how the collection system is organized B. how to locate sewers C. the structure of an agency D. the way to select solutions to problems - ✔ ✔ C. the structure of an agency Decentralization of organization refers to A. nominating new supervisors B. looking at all positions, and possibly redelegating authority C. firing all employees and hiring new ones D. eliminating some departments - ✔ ✔ B. looking at all positions, and possibly redelegating authority Which one of the following would not be considered a natural event? A. explosion B. flood C. lightning D. tornado - ✔ ✔ A. explosion
Public relations are important because we A. like our jobs B. need lots of training C. want to finish our work in a hurry D. work for the public - ✔ ✔ D. work for the public The best way to record all work done is through A. closed circuit TV B. polaroid system C. tape recorder D. work order system - ✔ ✔ D. work order system The most important function of record-keeping is A. they record how much money was budgeted and how much we spent B. they record the past and provide a sound basis on which to plan the future C. they record what was done and when it was done D. they record where we've been and how we got where we are today - ✔ ✔ B. they record the past and provide a sound basis on which to plan the future All of the following are types of starters for electrical motors except A. actuator
B. autotransformer C. reduced voltage D. resistors - ✔ ✔ A. actuator Instrumentation friction discs or clutch surfaces should be A. frequently brushed briskly with a solution of water and soda. B. kept free of oil C. oiled frequently D. roughened with emery cloth as necessary - ✔ ✔ B. kept free of oil If a generator will not start, check for A. loose terminal connections B. shaft binding or sticking C. tripped circuit breakers D. all of the above - ✔ ✔ D. all of the above Given the data below, what is the most likely cause of the problem? DATA: Wet well inlet increased flow because of rain Wet well unchanged at excessively high level Lead pump running Follow pump running Lead pump check valve lifting arm up
Electrical controls automatic mode A. malfunctioning level control is causing pressure switches to open too soon B. malfunctioning level control is causing pumps to run out of phase C. malfunctioning level control is causing pumps to run constantly D. malfunctioning level control is causing high wet well level - ✔ ✔ C. malfunctioning level control is causing pumps to run constantly The managerial function which involves devising an appropriate system of pay is A. controlling B. organizing C. planning D. staffing - ✔ ✔ C. planning For utility records and/or rate analyses purposes, customers with similar patterns of water use are usually grouped together into classes. Which one of the following is not generally used? A. commercial B. domestic C. industrial D. retail - ✔ ✔ D. retail The span of supervision is the
A. average length of time required to be in the organization before making supervisor B. number of levels between the lowest employee and the boss C. number of subordinates for each manager D. number of supervisors in an organization - ✔ ✔ C. number of subordinates for each manager If an organization's departments are organized by jobs to be done, this is known as departmentation by A. customer B. function C. product D. territory - ✔ ✔ B. function Decentralized authority describes the process of A. changing an organization from centralized to decentralized again B. delegating authority to one's superiors instead of one's subordinates C. delegating power for decisions to lower levels D. retracting authority which has been previously delegated, and probably changing
What should be the most important concern of an operator after a bypass? A. aquatic life B. clean-up procedures C. health-related effects D. odors - ✔ ✔ C. health-related effects A supervisor could be responsible for an accident, in part or completely, by A. disregarding an unsafe work environment B. haste in requiring work performed C. overlooking a potential hazard D. all of the above - ✔ ✔ D. all of the above Increased funds for the year are limited. However, 2 or 3 outstanding newly employed individuals are grossly underpaid for their services. How should this situation be handled? A. call a staff meeting, explain the situation and then raise their salaries B. don't give anyone a raise C. pass the word that there will be no raises but change their titles, not their duties, and raise their pay
D. Say nothing and do nothing because it is none of the employee's business - ✔ ✔ A. call a staff meeting, explain the situation and then raise their salaries When purchased materials are received by the utility, they should not be A. counted and checked against P.O.'s B. inspected C. placed on shelves where they will be used first D. recorded - ✔ ✔ C. placed on shelves where they will be used first Disaster plans should be developed in case of A. broken sewers B. floods C. power outages D. pump stoppages - ✔ ✔ B. floods Public relations are important because we A. want to finish our work in a hurry B. need lots of training C. must deal with the public D. like our jobs - ✔ ✔ C. must deal with the public
The gas most commonly associated with septic wastewater is A. carbon dioxide B. carbon monoxide C. hydrogen sulfide D. methane - ✔ ✔ C. hydrogen sulfide How many cubic meters per second in 10 MGD? A. 0. B. 1. C. 4. D. 24.62 - ✔ ✔ A. 0. Mechanical ventilation of a lift station is required to A. lower temperatures to reduce proportion of hydrogen sulfide B. reduce chlorine demand C. reduce corrosion D. increase DO in raw wastewater - ✔ ✔ C. reduce corrosion A wet well probe is usually used for ________ determination(s) of level. A. approximate B. dual point C. continuous D. single point - ✔ ✔ D. single point
A pump is delivering at less than the expected rate of discharge. Which of the causes listed below is incorrect? A. speed of motor too low B. pump not primed C. impeller clogged D. discharge head too low - ✔ ✔ D. discharge head too low Metal pipes often fail because of A. back siphonage B. browning movement C. galvanic action D. reverse osmosis - ✔ ✔ C. galvanic action When a fire hydrant is operated, it should be A. just opened enough to have a flow B. opened fully C. opened halfway D. regulated to flow required - ✔ ✔ B. opened fully If the pump bearings on horizontal centrifugal pumps are over lubricated, the most important effect is that the extra lubricant A. will result in smoother and more efficient operation of the pump B. will not make any difference in the operation of the pump
