WASTEWATER CERTIFICATION EXAM
2025/2026 QUESTIONS AND ANSWERS
100% PASS
The first step in maintenance staff should take in properly locking and tagging out a piece of
equipment is to - ANS alert the operator on duty
When working in an area with two or more floor coverings, be sure that they are always -
ANS Secured together
When manually lifting any object be sure to - ANS 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 -
ANS 19.5%
What provides safety information for potentially hazardous or toxic materials? - ANS MSDS
Material safety Data Sheet
The threshold limit value concentration for chlorine vapor is - ANS 0.5 ppm
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, When working in confined spaces where flammable gases may be present, use only tools made
of - ANS 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? - ANS 1
Hearing protection must be made available to all employees exposed to noise levels above -
ANS 85 decibels, averaged over 8 working hours
Recommended personal hygiene practices to minimize the risk of being infected by wastewater
pathogens include - ANS 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 - ANS 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? -
ANS Class C`
In confined space entry, LFL stands for - ANS Lower flammability limit
When mixing dry sodium hydroxide and water in an enclosed vessel or area, be sure that -
ANS the vessel or area is properly vented
Personnel should not work alone on energized equipment, for example, a magnetic starter, that
operates at or above - ANS 480 volts. It is considered lethal any amount about this.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
2025/2026 QUESTIONS AND ANSWERS
100% PASS
The first step in maintenance staff should take in properly locking and tagging out a piece of
equipment is to - ANS alert the operator on duty
When working in an area with two or more floor coverings, be sure that they are always -
ANS Secured together
When manually lifting any object be sure to - ANS 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 -
ANS 19.5%
What provides safety information for potentially hazardous or toxic materials? - ANS MSDS
Material safety Data Sheet
The threshold limit value concentration for chlorine vapor is - ANS 0.5 ppm
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, When working in confined spaces where flammable gases may be present, use only tools made
of - ANS 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? - ANS 1
Hearing protection must be made available to all employees exposed to noise levels above -
ANS 85 decibels, averaged over 8 working hours
Recommended personal hygiene practices to minimize the risk of being infected by wastewater
pathogens include - ANS 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 - ANS 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? -
ANS Class C`
In confined space entry, LFL stands for - ANS Lower flammability limit
When mixing dry sodium hydroxide and water in an enclosed vessel or area, be sure that -
ANS the vessel or area is properly vented
Personnel should not work alone on energized equipment, for example, a magnetic starter, that
operates at or above - ANS 480 volts. It is considered lethal any amount about this.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
