Arizona Water Treatment Operator Certification Exam – Grade 2 Exam Practice Questions And

Arizona Water Treatment Operator Certification Exam – Grade 2 Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationale 2026 Q&A| Instant Download Pdf Service tap components usually include a tapping saddle, corporation stop, service line tubing, curb stop, and _______. meter T/F: A distribution system without dead ends is called an open system False (looped system) An intruder-resistant fence with lockable gates must enclose the storage site. T/F: Ground water supply systems serving more than 50 connections must have a -ground (total) storage capacity of 200 gallons per connection and -elevated storage capacity of 100 gallons per connection or -pressure tank capacity of 20 gallons per connection. True True The system must maintain a minimum pressure of ____ psi under normal conditions and at least _____ psi during emergencies. 35 / 20 The primary advantage of elevated storage is that pressure is ___________ when supply pumps are off or electrical power is lost. maintained Stored water can meet sudden demands such as fire, absorb pressure surges, provide detention/contact time for ________, and allow for expansion of the distribution system. chlorination T/F: Methods of fighting corrosion include coatings, temperature adjustment, and cathodic protection. False (pH adjustment, Orthophosphates, Poly-pigs) T/F: The most common design for residential service is the positive replacement meter. False T/F: The curb stop connects the main service line and the corporation stop isolates the meter for repair or replacement False (The *corporation stop* connects to the city main and the *curb stop* is used to isolate the meter for repair) T/F: Close a fire hydrant slowly or a water log could occur. False To help safeguard against electrocution or machine injury, a safety program should have a ___________ policy. lockout / tagout Install all _______ from the top down and remove from the bottom up. T/F: Before digging, notify underground utilities. True shoring The Texas Hazard Communication Act requires employers to provide Safety Data Sheets (SDS) for hazardous ______ used in the workplace. chemicals T/F: Barricade stripes must slope downward at 30 degrees in the direction the traffic is to pass. False (45 degrees) T/F: Training in the hazardous chemicals must be taken only once a year. False The STOP/SLOW paddle should be the ______ traffic control device. primary T/F: Flashing lights must be yellow and are excellent for attracting a driver's attention toward a potential hazard. True T/F: A confined space entry program should identify confined spaces, establish a permit system, train personnel, provide safety equipment and develop rescue procedures. True The State allows utility works to use _______ control devices at work sites provided the devices conform to current manual criteria. traffic Generally, signs should be located on the right-hand side of the road and mounted on supports, posts, or __________ barricades The least stable soil type is _________ Type C A good safety program should have management leadership, employee participation, hazard identification, training, and ____________. equipment T/F: A competent person should inspect the cave-in protection at least daily. True T/F: The Texas Hazard Communication Act is known as the "Right to Risk Law" False ("Right to Know") A confined space entry team consists of a supervisor, an attendant, and an authorized _________. entrant Oxygen deficiency is considered to be less than ____% oxygen. 19.5 T/F: Limit flag use to emergency situations and at locations controlled by a single flagger. True The spoil should be placed no closer than ___ft from the edge of the excavation. 2 ft For day or night work, a flagger's clothing can be blue or brown. False Which of the following is part of a hypochlorination system? a) solution feed pump b) gas cylinder c) rotameter d) injector/ejector e) all of the above a) solution feed pump An elevated storage tank should be protected against corrosion by: a) painting b) cathodic protection c) water stabilization d) all of the above e) galvanizing d) all of the above (painting, cathodic protection, and water stabilization) The pH of water indicates whether it is acidic or basic and is expressed by a scale of numbers ranging from: a) 0 - 7 b) 0 - 14 c) 1 - 7 d) 1 - 14 e) none of the above b) 0 - 14 Before a new main is placed into service, it must be properly disinfected with a minimum chlorine dosage of: a) 50 mg/L b) 30 mg/L c) 40 mg/L d) 75 mg/L e) 25 mg/L a) 50 mg/L A common chemical used for disinfecting a small public water supply is: a) soda ash b) copper sulfate c) sodium hypochlorite d) fluoride e) sodium chloride c) sodium hypochlorite Gravity filters will remove which of the following from surface water supplies: a) turbidity b) taste and odors c) nitrates d) hardness e) chlorides a) turbidity If you added 3.5 mg/L of chlorine to your storage tank and 30 minutes later measured the residual at 1.2 mg/L, what was the chlorine demand in the tank? a) 4.2 b) 2.9 c) 0.3 d) 2.3 e) 4.7 d) 2.3