WASTE WATER CERTIFICATION REVIEW
SET 2026 ANSWERS GUARANTEED PASS
⫸ What is the primary purpose of a safety data sheet (SDS)? Answer:
To provide health and safety information regarding the use and handling
of specific materials
⫸ A sewer system shall not be entered without a self-contained
breathing apparatus (SCBA) if the hydrogen sulfide (H2S) level exceeds
Answer: 10 ppm
⫸ Nobody may enter a confined space, as defined by the Occupational
Safety and Health Administration (OSHA) or the employer, unless the
proposed entrant has first undergone training in Answer: The details of
the facility confined space entry procedures
⫸ What type of kit may be used to repair a chlorine leak from a 1-ton
container? Answer: Type B
⫸ The exhaust vents for a chlorine or sulfur dioxide cylinder room are
located Answer: Near the floor
⫸ What class of extinguisher should be used for electrical fires?
Answer: Class C
,⫸ What personal protective equipment (PPE) does the Chlorine Institute
recommend for emergency response to a chlorine release when liquid
chlorine is not involved? Answer: Level B
⫸ OSHA defines a "confined space" using three conditional criteria.
What are the three criteria? Answer: The space must be of adequate size
and have a configuration where a worker can enter the space; the space
has a limited means of access or egress; the space was not designed for
continuous human occupancy.
⫸ Which of the following is considered to be MOST important for
preventing personal exposure to biological hazards in a water resource
recovery facility? Answer: Proper personal protective equipment and
proper hygiene
⫸ At what concentration in air is chlorine gas likely to cause toxic
pneumonitis and pulmonary edema? Answer: More than 40 ppm, but
less than 60 ppm
⫸ Which of the following is NOT a closed-pipe flowmeter? Answer:
Flume
⫸ Pressure measurement devices are used directly in water resource
recovery facilities for maintaining proper Answer: Pressure in
lubrication and seal systems
, ⫸ If a motor starter trips a motor, leads can be disconnected and the
windings checked, reading each phase to ground. If the volt-ohmmeter
shows a low ohm reading, the phase is Answer: Grounded
⫸ A possible cause of low output capacity from a plunger pump could
be Answer: An air leak in suction piping
⫸ The MAIN reason that electrical distribution networks are ground is
to Answer: Prevent the development of unsafe conditions
⫸ Which component of anaerobic digester gas can form acid in a
digester boiler? Answer: Hydrogen sulfide
⫸ The MOST important parameter to monitor on a chemical feed pump
is Answer: Flow rate
⫸ What is the recommended material for liquid chlorine piping?
Answer: Chlorinated polyvinyl chloride (CPVC)
⫸ On a circular clarifier mechanism, which of the following pins is
designed to fail in an over-torque situation before any structural damage
occurs to the sludge collection mechanism? Answer: Shear
⫸ Misalignment between a motor and a pump could cause Answer:
Shaft damage
SET 2026 ANSWERS GUARANTEED PASS
⫸ What is the primary purpose of a safety data sheet (SDS)? Answer:
To provide health and safety information regarding the use and handling
of specific materials
⫸ A sewer system shall not be entered without a self-contained
breathing apparatus (SCBA) if the hydrogen sulfide (H2S) level exceeds
Answer: 10 ppm
⫸ Nobody may enter a confined space, as defined by the Occupational
Safety and Health Administration (OSHA) or the employer, unless the
proposed entrant has first undergone training in Answer: The details of
the facility confined space entry procedures
⫸ What type of kit may be used to repair a chlorine leak from a 1-ton
container? Answer: Type B
⫸ The exhaust vents for a chlorine or sulfur dioxide cylinder room are
located Answer: Near the floor
⫸ What class of extinguisher should be used for electrical fires?
Answer: Class C
,⫸ What personal protective equipment (PPE) does the Chlorine Institute
recommend for emergency response to a chlorine release when liquid
chlorine is not involved? Answer: Level B
⫸ OSHA defines a "confined space" using three conditional criteria.
What are the three criteria? Answer: The space must be of adequate size
and have a configuration where a worker can enter the space; the space
has a limited means of access or egress; the space was not designed for
continuous human occupancy.
⫸ Which of the following is considered to be MOST important for
preventing personal exposure to biological hazards in a water resource
recovery facility? Answer: Proper personal protective equipment and
proper hygiene
⫸ At what concentration in air is chlorine gas likely to cause toxic
pneumonitis and pulmonary edema? Answer: More than 40 ppm, but
less than 60 ppm
⫸ Which of the following is NOT a closed-pipe flowmeter? Answer:
Flume
⫸ Pressure measurement devices are used directly in water resource
recovery facilities for maintaining proper Answer: Pressure in
lubrication and seal systems
, ⫸ If a motor starter trips a motor, leads can be disconnected and the
windings checked, reading each phase to ground. If the volt-ohmmeter
shows a low ohm reading, the phase is Answer: Grounded
⫸ A possible cause of low output capacity from a plunger pump could
be Answer: An air leak in suction piping
⫸ The MAIN reason that electrical distribution networks are ground is
to Answer: Prevent the development of unsafe conditions
⫸ Which component of anaerobic digester gas can form acid in a
digester boiler? Answer: Hydrogen sulfide
⫸ The MOST important parameter to monitor on a chemical feed pump
is Answer: Flow rate
⫸ What is the recommended material for liquid chlorine piping?
Answer: Chlorinated polyvinyl chloride (CPVC)
⫸ On a circular clarifier mechanism, which of the following pins is
designed to fail in an over-torque situation before any structural damage
occurs to the sludge collection mechanism? Answer: Shear
⫸ Misalignment between a motor and a pump could cause Answer:
Shaft damage
