WASTEWATER OPERATOR GUIDE TO PREPARING FOR THE CERTIFICATION EXAMINATIONS (CLASS B-A OR III-IV)

WASTEWATER OPERATOR GUIDE TO PREPARING FOR THE CERTIFICATION EXAMINATIONS (CLASS B-A OR III-IV) Anaerobic digestion gas handling systems are kept under positive pressure for what reason? - correct answer To prevent air from entering the system and mixing with digester gas, which could cause an explosion What are the components of an effective safety program? - correct answer Regular safety briefings, daily practice, a strong advocate for safety, and a strong central leader. Which of the following are the most effective sources of information for managers regarding patterns of ergonomic-related injuries and illnesses when evaluating the success of a safety program? - correct answer Employee illness records, employee injury records, and worker's compensation claims data In addition to the mechanical hazards of working around machinery, which of the following environmental hazards are also likely to be faced by maintenance workers at a water resource recovery facility? - correct answer Noise, heat insulation (asbestos), and heat illness and stress What best describes the symptoms of heat stroke? - correct answer Confusion, loss of consciousness, and seizures If the rake on a mechanically cleaned screen is inoperable and there is no visible problem, the issue is likely a(n) ________. - correct answer Electrical issue Resistance temperature detectors (RTDs) are most commonly used on ___________ ambient-range temperatures. - correct answer Lower