NEHA RS EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE
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NEHA RS
NEHA RS EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE
Which of the following is true regarding proper septic functions? - Answer- Breakdown of solids by anaerobic actions
Wastewater from toilets, latrines, or privies containing fecal matter is commonly referred to as: - Answer- Black wate...
NEHA RS EXAM QUESTIONS WITH
CORRECT ANSWERS LATEST 2024-
2025 UPDATE
Which of the following is true regarding proper septic functions? - Answer- Breakdown
of solids by anaerobic actions
Wastewater from toilets, latrines, or privies containing fecal matter is commonly referred
to as: - Answer- Black water
Septic tank system failures are most commonly caused by: - Answer- Seasonal high
groundwater tables
Carryover of solids into absorption field due to unrestricted water use in the home
The use of septic cleaning compounds
An efficient septic tank design should provide for a detention time longer than: - Answer-
24 hours
The study guide text recommends that copper sulfate be flushed down the toilet at a
rate of 2 -3 pounds per year to: - Answer- Destroy tree roots that may crack sewer lines
According to the EPA, septic tanks should be pumped and serviced every: - Answer- 3 -
5 years
The normal size septic tank installation for a 3 bedroom house is: - Answer- 1000
gallons
If a homeowner insists that a garbage disposal unit be installed under the kitchen sink,
the septic tank initially recommended should be: - Answer- Increased in size by 50%
Septic tanks serving commercial operations should be inspected at least every: -
Answer- 6 months
Waste matter eliminated from the body, containing about 27 grams per person per day
and containing 400 billion Escherichia coli is the definition of: - Answer- Excreta
A properly functioning septic tank will accomplish a 5 day BOD removal of about: -
Answer- 60 percent
,Which of the following constituents, commonly found in septic tank cleaners, could
cause a breakdown of soil structure resulting in reduced soil permeability? - Answer-
Sodium hydroxide
To ensure the removal of most pathogenic microorganisms in sewage, it is necessary to
have at least ______ feet of suitable soil between the bottom of the absorption field
trench bottom and the highest groundwater level or impermeable layer. - Answer- 2
The typical flow diagram of steps involved in the treatment in conventional municipal
sewage treatment unit processes, in order, is: - Answer- Screening - sedimentation -
oxidation - disinfection
Able to survive elevated temperatures (110 degrees) and being resistant to chlorine (up
to 2 ppm), this bacterium is of particular concern in spa pools. - Answer- Pseudomonas
The term "super chlorinate" basically means the free residual concentrations is
increased by: - Answer- 2 ppm
A strong chlorine odor in a pool is indicative of the presence of: - Answer- Chloramines
Skimmers work effectively at removing floating body oils and bacteria in a water level
range of about: - Answer- 4 inches
When testing a pool's chlorine level, the individual testing should: - Answer- Collect
samples 18 inches below the surface
Not collect samples near the inlet
Read results within one minute
Algae that usually appear in the pool as dark spots or patches on the walls and bottom,
can be controlled and prevented if a free chlorine level of _______ ppm is consistently
maintained. - Answer- 1.0
If pool pH is too high, it may promote scaling formation. To lower pH, it is recommended
that the following chemical compound be used: - Answer- Sodium bisulfate
If pool water pH is too low, it may promote corrosion of pipes and fixtures, may cause
eye irritation and require more chlorine be used. To increase the pH, which of the
following chemical compounds is recommended for use? - Answer- Sodium carbonate
The recommended pH for pool water is: - Answer- 7.4-7.6
Maximum filter flow rates for rapid sand filters used in public pools is: - Answer- 3
gallons per minute per square foot
, A pool that has been officially closed can only be reopened by a: - Answer- Health
department rep
Phenol red is provided in test kits to determine the ______ level. - Answer- pH
Pool filters must meet standards met by: - Answer- NSF
Which of the following types of filters are not recommended for use in outdoor public
pools? - Answer- Cartridge filters
Health departments recommend spa pools be drained: - Answer- Weekly
The compound generally referred to as "soda ash" is: - Answer- Sodium carbonate
Routinely used pool's re-circulation system must be able to attain turnover every: -
Answer- 6 hrs
The ideal level of alkalinity in pool water is: - Answer- 100 mg/l
According to 2010 revised estimates by the CDC, the number of deaths annually related
to foodborne illnesses, is estimated to be: - Answer- 5,000
Although the Norwalk-like virus is considered an extremely common cause of foodborne
illness, it is rarely diagnosed. According to Marriott, approximately 66% of all foodborne
illnesses in the US are caused by: - Answer- bacteria
When discussing infective dose, exposure to 2 or more substances can cause this
effect - Answer- antagonistic
additive
synergistic
According to Marriott this pathogen is estimated to cause 2500 serious illnesses and
500 deaths annually (2001): - Answer- listeria monocytogenes
Large outbreaks of norovirus, vibrio parahaemolyticus, and vibrio vulnificus are
generally associated with: - Answer- Raw oysters
Incomplete cooking and cooling of stews, meats, gravies, and large cuts of meat that
have been rolled or penetrated with skewers can lead to outbreaks of: - Answer-
Clostridium perfringins food poisoning
Botulism, caused by C. Botulinum, is a hazard in prepared foods in which oxygen has
been driven off in cooking and in which the food is shielded from oxygen and kept
warm, permitting surviving spores to germinate and produce the deadly toxin. Which of
the following is a possible example of this occurring? - Answer- Meat pies
Sautéed onions
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