California Wastewater Operator Exam, Safety and Hazards: all 26 questions
All questions from the Safety and Hazards section for California Wastewater Operator Exam, each with the correct answer.
- 1001Hydrogen sulfide (H2S) is especially dangerous to operators because, at higher concentrations, it
- 1002Which gas is heavier than air and tends to collect in manholes and wet wells?
- 1003What must be done before an employee enters a permit-required confined space such as a wet well?
- 1004What is the minimum safe oxygen concentration in the air of a confined space before entry?
- 1005Which instrument reading means a confined space has a flammable atmosphere hazard?
- 1006Which is the purpose of a lockout/tagout procedure?
- 1007During lockout/tagout, who may remove a lock that was placed on a motor control center?
- 1008Chlorine gas leaks are best approached by an operator who is
- 1009What should be done first when an employee is found unconscious in a manhole?
- 1010Which type of fire extinguisher is rated for energized electrical equipment?
- 1011Under hazard communication (right-to-know) rules, a Safety Data Sheet (SDS) provides
- 1012Which personal protective equipment is most appropriate for a worker collecting a raw sewage sample?
- 1013Which immunization is typically recommended for wastewater workers because of their exposure to sewage?
- 1014What is the main hazard of working near open channels and clarifiers?
- 1015Methane produced in an anaerobic digester is dangerous mainly because it is
- 1016Digester gas piping and gas-handling equipment should be protected by
- 1017The fire triangle consists of
- 1018What does a chlorine ton container's fusible plug do?
- 1019How should a wastewater operator test for a chlorine gas leak at a connection?
- 1020What is the first step in the safe response to a small acid spill on the floor?
- 1021Which action is required before a pump or machine can be repaired while it is connected to a piping system with stored pressure?
- 1022A noise survey shows an operator is exposed to 90 decibels over an 8-hour shift. The best control is
- 1023Lifting heavy objects safely means
- 1024Which situation requires an immediate evacuation by employees?
- 1025A written safety program for a plant is most effective when it includes
- 1026A person who is exposed to raw sewage and then eats lunch without washing is at risk mainly of
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