WASTEWATER CERTIFICATION EXAM QUESTIONS EXAM

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WASTEWATER CERTIFICATION EXAM QUESTIONS EXAM

QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -38 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: When using protable electric tools in damp areas or around standing water, be sure to plug them into a

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ground fault circuit interrupter Question 2: In addition to the worker entering a confined space, what is the minimum number of people required to be present during a confined space entry?

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1 Question 3: Which of the following hazardous chemicals in a hydrocarbon? Methane.Phosphoric acid. Sodium hydroxide. Ferric chloride.

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Methane.Question 4: Recommended personal hygiene practices to minimize the risk of being infected by wastewater pathogens include

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changing out of your work clothes and showering before leaving work

Question 5: The mechanism used to remove dewatered sludge from the belt of a belt press filter press is commonly referred to as a

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doctor blade Question 6: Pumps are often required to bring wastewater into a treatment plant. What types of pumps are typically used to lift influent wastewater?

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Centrifugal pumps are primarily used to bring in wastewater, positive displacement pumps are used to transport sludge.Question 7: If your facility stores _______ or more chlorine, you must develop a Risk Management Program in compliance with the U.S. EPA's Chemical Accidental Release Prevention Regulations.

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1140 kg (2500 lb) Question 8: When working in an area with two or more floor coverings, be sure that they are always

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Secured together Question 9: After chlorine, what is the most common effluent wastewater disinfection technique or agent used in the U.S. today?

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Ultraviolet radiation. Due to fewer safety concerns Question 10: The BOD loading rate divided by the quantity of microorganism present in the biological reactors (aeration tanks) is known as

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the food to microorganism ratio (F:M)

Question 11: Typical components of grit removal systems include

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chain-and-flight scrapers

Question 12: Which type of polymer has the most active product per unit weight?

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Dry polymer Question 13: Hearing protection must be made available to all employees exposed to noise levels above

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85 decibels, averaged over 8 working hours

Question 14: primary treatment

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process used to seperate solid matter that will settle to the bottom or float from waste water being treated. a septic tank is an example.Question 15: The time it takes for a unit volume of wastewater to pass entirely through a primary clarifier is called

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detention time.Question 16: The first step in maintenance staff should take in properly locking and tagging out a piece of equipment is to

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alert the operator on duty Question 17: Personnel should not work alone on energized equipment, for example, a magnetic starter, that operates at or above

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480 volts. It is considered lethal any amount about this.Question 18: What provides safety information for potentially hazardous or toxic materials?

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MSDS Material safety Data Sheet

Question 19: Conventional activated sludge systems typically operate with a DO range of

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2-5 mg/l Question 20: Which of the following terms describes an activated sludge process mode in which aeration and clarification occur in the same tank?

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Sequencing batch reactor Question 21: At concentrations less that ___ , chlorine gas is not detectable by the human sense of smell

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• ppm or less

Question 22: According to article 250 of the U.S. National Electric Code (NEC), what color should green wires be?

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Green.

Question 23: When manually lifting any object be sure to

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keep it close to your body and use leg strength

Question 24: In confined space entry, LFL stands for

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Lower flammability limit Question 25: Large debris (sticks, rocks, ect) large floating solids, and fibrous maters (rags, strings, cloth, etc.) are categorized as

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Screenings. This material is removed prior to pumps to prevent damage.Question 26: White fluffy foam on the biological reactors in an activated sludge process is usually caused by

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Low Dissolved Oxygen