Wastewater Exam Questions With 100% Correct Answers

Wastewater Exam Questions With 100% Correct Answers water becomes denser as it becomes - answercolder chemical symbol for lead - answerPb Elements that are isotopes contain different numbers of ______________ - answerneutrons table salt is - answersodium chloride Water has a much higher boiling point than expected because of - answerhydrogen bonding Chemical bonds occur when atoms share___________ - answerelectrons The number of electrons in an atom's outermost electron layer determine its ____________ - answerchemical properties The chief operator at a Grade 2 plant must be certified at a Grade ___ or higher, and the assistant operator must be certified at a Grade ___ or higher. - answer2,1 314 CMR 12:00, O&M of Sewer Systems, and WW Treatment Facilities is governed by - answerDiv. of Water Pollution Control Under Mass. Regulations, what is the maximum temperature allowed into a POTW? - answer40°C MWRA is an acronym for - answerMass Water Resources Authority For purposes of industrial wastewater regulations, boiler blow-down, sanitary wastewater and non-contact cooling water are examples of - answerdilution streams information on an SDS includes: a. Fire and explosion hazard data b. Waste disposal method c. Health hazard data d. Precautions for safe handling e. all of these - answere. all of these In order to maintain wastewater certification, all certified operators must obtain _____ hours of approved training annually. - answer10 No industrial facility shall discharge to a POTW a waste stream with a pH lower than - answer5.5 T/F: A licensed wastewater treatment plant operator is required to acquire 20 Training Contact hours a year. - answerFalse Which of the following statements about certified wastewater treatment personnel are true concerning training contact hours (TCH's)? a. All Inactive operators must earn TCH's b. All Operators in Training operators must earn TCH's c. All Full operators must earn TCH's d. B and C - answerd. B and C One CEU (continuing education unit) is equal to ___ TCH's (training contact hours). - answer10 A common characteristic of the discharges of plastics plants include - answertemperature Meat packing wastes, including slaughterhouses , generate wastes high in: a. B O D b. Nitrogen c. Suspended solids d. All of these - answerd. all of these The main reason to treat dairy wastes is to remove - answerhigh BOD Paper mills and paper product plants generate wastes with high concentrations of a. T S S b. Dissolved solids c. B O D d. Color e. All of these - answere. all of these Which of the following items is a major characteristic of the wastes from the production of dairy products? a. High in dissolved organic matter b. Low BOD c. Very low pH d. High in inorganic matter - answera. high in dissolved organic matter Which of the following items is a major characteristic of the wastes from the production of soft drinks? a. Low pH b. High pH c. Low suspended solids d. Low BOD - answera. low PH Which of the following items is a major characteristic of the wastes from the production of paints and inks? a. High BOD b. High oils c. High pH d. High suspended solids - answerb. high oils What are the characteristics of dairy wastes? - answerhigh BOD, high suspended solids What is normally used to treat laundry waste? - answerhydrochloric acid What step should be taken prior to dumping high temperature condensate to a waterway? - answerwait for temperature to drop before disposing Which of the following industries produces the most toxic wastewater? a. Textile b. Pulp and paper c. Pesticide d. Brewery - answerc. pesticide Toxic industrial wastes include _______ wastes - answerpesticide Solid hazardous wastes from industries eventually are deposited in - answerlandfills What would be the primary concern to the waste stream from water being discharged from a condenser or cooling tank? - answertemperature What is the primary characteristic of waste waters from a tannery operation - answerhigh salts What is the primary characteristic of waste waters from a metal treatment steam? - answertoxic What is a major characteristic of wastewaters discharged from the fermentation industry? - answerhigh BOD and low PH What is the primary characteristic of wastewaters discharged from electroplating industries - answerheavy metals What are the primary characteristics of waters discharged from industrial laundry operations - answerHigh pH and fibrous suspended solids When constructing a new plant why should the operator be on site prior to the completion of construction? a. To unpack pumps and other equipment b. To make sure the installed equipment can be easily operated and maintained c. To make design changes when needed d. The operator does not need to be there during construction but should be hired just prior to accepting wastewater into the facility - answerb. To make sure the installed equipment can be easily operated and maintained Pathogens a. Are bacteria or viruses that cause disease b. Are bacteria that are not found in water c. Can obtain their food supply without help d. Are not harmful to humans - answera. are bacteria or viruses that cause disease Class 'A' waters are suitable for a. Drinking