MA Industrial Wastewater Treatment
Plant Operator Grade 2 Practice Exam
200 Questions with Answers & Detailed
Explanations 2026 Edition
MA Industrial Wastewater Treatment
Plant Operator
,1|Page
The three ways to protect operators from haz-ards are
_____________, ____________, and
_____________. ..........ANSWER.......Engineering controls, work
practice controls, personal protective equipment
Safety equipment may deteriorate due to
________, ___________, and ____________.
..........ANSWER.......heat, time, other environmental factors
Where should self-contained breathing apparatus
be stored? ..........ANSWER.......In an unlocked cabinet with a
controlled environment
______________, ______________, and
________________ are three pieces of personal
protective equipment. ..........ANSWER.......Hard hats, safety
shoes, chemical-resistant clothing, gloves, toe guards, safety
glasses or goggles
,2|Page
When is wearing gloves dangerous?
..........ANSWER.......When working around revolving
machinery
Noise control measures include ______________,
______________, and ________________.
..........ANSWER.......source control, path control, receiver
control
When should operators start their safety training?
..........ANSWER.......First day of work at a facility
What is a tailgate safety meeting?
..........ANSWER.......Short meeting to discuss safety topics and
distribute relevant materials
What is an emergency response plan?
..........ANSWER.......A standardized set of procedures
used to minimize the effects of and plan for rapid
recovery from emergencies.
, 3|Page
What devices can be used to rescue someone
who has fallen into a filter? ..........ANSWER.......Buoy,
manila line, and long wooden pole.
What is the operator's best protection against
infections and diseases? ..........ANSWER.......Personal
cleanliness
Whether painting using a brush or spray,
suffcient ____________ must be available if the
operator is painting indoors or in a closed area.
..........ANSWER.......Ventilation
Gas concentrations below the LEL are too
__________ to ignite, and gas concentrations
above the UEL are too __________ to ignite.
..........ANSWER.......Lean, rich
Plant Operator Grade 2 Practice Exam
200 Questions with Answers & Detailed
Explanations 2026 Edition
MA Industrial Wastewater Treatment
Plant Operator
,1|Page
The three ways to protect operators from haz-ards are
_____________, ____________, and
_____________. ..........ANSWER.......Engineering controls, work
practice controls, personal protective equipment
Safety equipment may deteriorate due to
________, ___________, and ____________.
..........ANSWER.......heat, time, other environmental factors
Where should self-contained breathing apparatus
be stored? ..........ANSWER.......In an unlocked cabinet with a
controlled environment
______________, ______________, and
________________ are three pieces of personal
protective equipment. ..........ANSWER.......Hard hats, safety
shoes, chemical-resistant clothing, gloves, toe guards, safety
glasses or goggles
,2|Page
When is wearing gloves dangerous?
..........ANSWER.......When working around revolving
machinery
Noise control measures include ______________,
______________, and ________________.
..........ANSWER.......source control, path control, receiver
control
When should operators start their safety training?
..........ANSWER.......First day of work at a facility
What is a tailgate safety meeting?
..........ANSWER.......Short meeting to discuss safety topics and
distribute relevant materials
What is an emergency response plan?
..........ANSWER.......A standardized set of procedures
used to minimize the effects of and plan for rapid
recovery from emergencies.
, 3|Page
What devices can be used to rescue someone
who has fallen into a filter? ..........ANSWER.......Buoy,
manila line, and long wooden pole.
What is the operator's best protection against
infections and diseases? ..........ANSWER.......Personal
cleanliness
Whether painting using a brush or spray,
suffcient ____________ must be available if the
operator is painting indoors or in a closed area.
..........ANSWER.......Ventilation
Gas concentrations below the LEL are too
__________ to ignite, and gas concentrations
above the UEL are too __________ to ignite.
..........ANSWER.......Lean, rich
