Water Treatment OIT test

Water Treatment OIT test b) Kilopascals Ans- What units are used to measure water pressure? a) Kilowatts b) Kilopascals c) Horsepower d) Head units a) Exhaust fan Ans- Which of the following is NOT an example of PPE (Personal Protective Equipment)? a) Exhaust fan b) SCBA c) Face shield d) Traffic vest d) Be the operator with overall operational responsibility of the system Ans- 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 c) The height or energy of water above a specified point Ans- Define the term "head" as used in hydraulic systems. a) The block of an internal combustions 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 b) Is a greenish/yellow gas with a penetrating odour; is heavier than air Ans- Which of the following statements accurately describes some of the properties of chlorine? a) I a colourless gas which is toxic to plants and animals; is flammable and explosive b) Is a greenish/yellow gas with a penetrating odour; is heavier than air c) Is a yellowish gas with an irritating odour; insoluble in water d) Is lighter than air; soluble in water and forms a salt which is lethal to microorganisms a) chemical compound is formed Ans- What happens when two or more different elements combine? a) chemical compound is formed b) atom is created c) molecule is formed d) concentration is created a) Any space which is not actively ventilated by an electrical ventilation system Ans- 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 a) Amperes Ans- The flow of electrical current is measured in a) Amperes b) Ohms c) Volts d) Watts b) contain carbon, hydrogen and oxygen Ans- What is meant by the term 'organic compounds'? Chemical compounds that are: a) not made from carbon b) contain carbon, hydrogen and oxygen c) can easily oxidize d) can dissolve in water d) 450 Ans- The volume of chlorine increases ______ times when it is depressurized into gas a) 100 b) 200 c) 350 d) 450 c) dissolved mineral salts Ans- What causes hardness in water? a) high pH b) low turbidity c) dissolved mineral salts d) alkalinity d) sewage works operators Ans- O. Reg. 129/04 addresses the licensing of: a) drinking water operators b) water quality analysts c) medical officers of health d) sewage works operators b) check Ans- Which of the following is NOT an isolation valve? a) ball b) check c) butterfly d) globe d) Do not enter the confined space until there is no hydrogen sulphide detected, and then only when all safety equipment is in place Ans- An operator smells hydrogen sulphide at the entrance of a deep confined space. that actions should the operator take? a) hydrogen sulphide is only detected in low concentrations and will only cause headaches at this concentration. Proceed if the task is short b) Vent the confined space while working c) Hydrogen sulphide gas in all concentrations is only an irritant, so proceed with the task d) Do not enter the confined space until there is no hydrogen sulphide detected, and then only when all safety equipment is in place b) Protect human health Ans- 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) High organic material content Ans- What does a sample with a high BOD level indicate? a) Low organic material content b) High organic material content c) High level of inorganic suspended solids d) Low level of pathogenic bacteria a) The terms and conditions stated in a C of A are legally enforceable Ans- Which of the following statements is the most accurate concerning a "Certificate of Approval" (C of A), issued by the Ministry of Environment? a) The terms and conditions stated in a C of A are legally enforceable b) The terms and conditions stated in a C of A are recommendations on how the facilities should be operated c) A C of A is only required for facilities built before 1965 d) Once a facility has been built the C of A is no longer required and can be discarded b) form floc Ans- Coagulation is the mixing of coagulants with water to: a) disperse colloidal material b) form floc c) inactivate colloids d) suspend floc c) organic materials Ans- Trihalomethanes are produced when chlorine reacts with: a) inorganic materials b) chlorine dioxide c) organic materials d) ultra violet ligh