Changing out of your work clothes and showering before leaving work What device(s) can be used as an emergency shut-off for the drive unit of a circular clarifier? - ✔✔✔ANSWER -Shear Pins You are the operator -on-duty. The alarm for the fire detector in the Belt Filter Press Control Room goes off. What type of fire extinguisher would you take to respond to this alarm? - ✔✔✔ANSWER -Class C When working in an area with two or more floor coverings (for example, grating and checker -plate), be sure that they are always _____. - ✔✔✔ANSWER -Secured together When working in confined spaces where flammable gases may be present, use only toolsmade of - ✔✔✔ANSWER -A non sparking alloy What is the best protection against the risk of exposure to infections and disease at a wastewater plant? - ✔✔✔ANSWER -Personal Hygenie Regarding fire extinguisher training in the workplace. The employer must provide what? - ✔✔✔ANSWER -A written and practiced emergency action plan. The combination of methane and which other gas can be very combustible? - ✔✔✔ANSWER -
Oxygen In what location of the sewer manhole would methane gas be found? - ✔✔✔ANSWER -At the top Which type of fire is safe for a pressurized water extinguisher or water hose to be used on? - ✔✔✔ANSWER -Brush Mixing dry granular chlorine (HTH) with petroleum products can cause which of the following? - ✔✔✔ANSWER -Create a fire or explosive condition The fusible plugs found on a 150lb cylinders and one -ton chlorinecontainers are designed to melt at what temperature range? - ✔✔✔ANSWER -158-165 degrees Fahrenheit In the event of a large leak of chlorine is occurring, what is the first action the operator should take? - ✔✔✔ANSWER -Immediately notify local fire and police departments A Class C type fire involves? - ✔✔✔ANSWER -
Electrical equipment