OWW OIT Exam Prep Questions And Answers Rated A+ New Update Assured Satisfaction

What units are used to measure water pressure? A) Kilowatts B) Kilopascals (kPa) C) Horsepower D) Head Units - ️️B) Kilopascals (kPa) Which of the following are operators-in-training NOT allowed to do? A) There are no restrictions on the duties of an operator-in-training B) Any operational duties if not in the presence of another operator C) Anything which could effect the quality of the water/wastewater D) Be the operator with overall operational responsibility of the system - ️️D) Be the operator with overall operational responsibility of the system Define the term 'head' as used in hydraulic systems. A) The block of an internal combustion engine B) the ability of a piston pump to overcome the force of gravity C) the height or energy of water above a specified point D) the distance between the liquid level and the cover of a well - ️️C) the height or energy of water above a specified point What is the definition of a confined space? A)Any space which is not actively ventilated by an electrical ventilation system B) Any space from which exit by an injured worker is difficult C) Any space where hazardous gas can accumulate or an oxygen deficient atmosphere can occur D) Any space where the distance from floor to ceiling is less than 3 metres - ️️C) Any space where hazardous gas can accumulate or an oxygen deficient atmosphere can occur The volume of chlorine increases ______ times when it is depressurized into gas A) 100 B) 200 C) 350 D) 450 - ️️D) 450 What causes hardness in water? A) high pH B) low turbidityC) dissolved mineral salts D) alkalinity - ️️C) dissolved mineral salts What is the main purpose of the Safe Drinking Water Act? A) Certify operators B) Protect human health C) Supervise drinking water systems D) Sample and test drinking water - ️️B) Protect human health A higher than normal BOD in the wastewater entering a conventional wastewater treatment plant will most likely have the greatest effect on which of the following processes? A) grit removal B) primary clarification C) activated sludge D) secondary clarification - ️️C) activated sludge Which of the following devices is used to measure the flow of wastewater in an open channel? A) comminutor B) compactor C) parshall flume D) sluice gate - ️️C) parshall flume Secondary treatment typically removes ______ of the BOD and suspended solids. A) 20-39% B) 40-59% C) 60-79% D) 80-99% - ️️D) 80-99% Water entering a wastewater treatment plant will pass through a bar screen. The bar screen is designed to remove which of the following items? A) dissolved solids B) grit and sand C) large objects D) nutrients - ️️C) large objects Define the term 'supernatant' A) a solution which is supersaturated B) a substance used to reduce odour in polluted watersC) the liquid located above a sediment or precipitate D) an operator who is extremely proficient in fulfilling their duties - ️️C) the liquid located above a sediment or precipitate Who is primary responsible for your safety? A) you B) employer C) MOE D) government - ️️A) you When operating a pump, an operator feels a vibration and hears a slight hammering noise. A) water hammer B) cavitation C) leak D) backflow - ️️B) cavitation What units are used to measure water pressure? A) Kilowatts B) Kilopascals (kPa) C) Horsepower D) Head Units - ️️B) Kilopascals (kPa) Which of the following are operators-in-training NOT allowed to do? A) There are no restrictions on the duties of an operator-in-training B) Any operational duties if not in the presence of another operator C) Anything which could effect the quality of the water/wastewater D) Be the operator with overall operational responsibility of the system - ️️D) Be the operator with overall operational responsibility of the system Define the term 'head' as used in hydraulic systems. A) The block of an internal combustion engine B) the ability of a piston pump to overcome the force of gravity C) the height or energy of water above a specified point D) the distance between the liquid level and the cover of a well - ️️C) the height or energy of water above a specified point What is the definition of a confined space?A)Any space which is not actively ventilated by an electrical ventilation system B) Any space from which exit by an injured worker is difficult C) Any space where hazardous gas can accumulate or an oxygen deficient atmosphere can occur D) Any space where the distance from floor to ceiling is less than 3 metres - ️️C) Any space where hazardous gas can accumulate or an oxygen deficient atmosphere can occur The volume of chlorine increases ______ times when it is depressurized into gas A) 100 B) 200 C) 350 D) 450 - ️️D) 450 What causes hardness in water? A) high pH B) low turbidity C) dissolved mineral salts D) alkalinity - ️️C) dissolved mineral salts