WasteWater certification exam questions

The first step in maintenance staff should take in properly locking and tagging out a piece of equipment is to - Correct Answer alert the operator on duty When working in an area with two or more floor coverings, be sure that they are always - Correct Answer Secured together When manually lifting any object be sure to - Correct Answer keep it close to your body and use leg strength Oxygen deficiency becomes a concern when the oxygen level in a confined space is less than - Correct Answer 19.5% What provides safety information for potentially hazardous or toxic materials? - Correct Answer MSDS Material safety Data Sheet The threshold limit value concentration for chlorine vapor is - Correct Answer 0.5 ppm When working in confined spaces where flammable gases may be present, use only tools made of - Correct Answer a non-sparking alloy In addition to the worker entering a confined space, what is the minimum number of people required to be present during a confined space entry? - Correct Answer 1 Hearing protection must be made available to all employees exposed to noise levels above - Correct Answer 85 decibels, averaged over 8 working hours Recommended personal hygiene practices to minimize the risk of being infected by wastewater pathogens include - Correct Answer changing out of your work clothes and showering before leaving work When using protable electric tools in damp areas or around standing water, be sure to plug them into a - Correct Answer ground fault circuit interrupter 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? - Correct Answer Class C` In confined space entry, LFL stands for - Correct Answer Lower flammability limit When mixing dry sodium hydroxide and water in an enclosed vessel or area, be sure that - Correct Answer the vessel or area is properly vented