REHS STUDYS 2026 EXAM QUESTIONS AND
ANSWERS RATED A+
✔✔Which best defines Enhanced Biological Treatment? - ✔✔Control of oxygen is a key
element to operating biological controlled process.
The amount of oxygen available will dictate which microbes will become dominant. (A
and B)
✔✔What is Dissolved Oxygen (DO)? - ✔✔Oxygen is one factor that controls the types
of microbes that are dominant in the system.
The amount of oxygen available will dictate which microbes will become dominant. (a
and B)
✔✔What is the meaning of Pasteurization? - ✔✔A heat process that kills all vegetative
pathogenic bacteria. A pasteurization temperature of 165F is commonly used in the milk
and food industry.
✔✔what is an example of non point source of pollution - ✔✔residential run off
✔✔what rate does not measure risk, the onset time is not relevant and it measures the
number of cases within a population - ✔✔prevalence rate
✔✔what is the correct time and temperature for hot water sanitation - ✔✔170 degrees
for 30 seconds
✔✔which isn't a certified lab test for water? - ✔✔trihalomethanes
✔✔which of the following diseases is resistant to disinfection and is the targeted
organism in pasteurization - ✔✔turberculosis
✔✔organophosphates: - ✔✔inhibit cholinesterase permanently and are non-persistent
(a and B)
, ✔✔final rinse temperature at the manifold in a single tank dishwasher - ✔✔180
✔✔word commonly used to describe dissentary - ✔✔shigella
✔✔space measuring in housing codes - ✔✔square feet per floor space
✔✔instrument to measure suspended particles in the air - ✔✔high volume sampler
✔✔which of the following causative agents of the genus plasmodium is the most
dangerous cause of malaria - ✔✔falciparum
✔✔rabies is caused by: - ✔✔rhabdovirus
✔✔a truck carrying molassses crashes and its contents are emptied into a lake. This
causes a fish kill. What is the most likely reason for the death of the fish? - ✔✔decrease
in the d.o due to increased BOD activity by bacteria
✔✔rotavirus is most likely to affect - ✔✔young children and infants
✔✔which of the following would be considered a non-cleanable surface? - ✔✔pitted pot
✔✔psittacosis is associated with - ✔✔birds
✔✔an individual came down with a case of mumps and a single case of influenza. What
is the difference in resistance? - ✔✔mumps exposure and resistance is lifelong while
influenza resistance is not lifelong due to changing virus characteristics (different
strains)
✔✔hep A virus: - ✔✔can not multiply in food or water. It must multiply in the host.
✔✔A rodent-borne disease or disease caused by an insect carried by a rodent -
✔✔epidemic typhus, endemic typhus or marine typhus
✔✔most common rat in the usa - ✔✔Rattus nervegicus
✔✔sylvatic plague is a disease from - ✔✔wild rodents
✔✔True or false. The pneumonic plague is rodent borne - ✔✔false
✔✔what disease is deadly and transmitted from mice - ✔✔hanta virus
✔✔What kind of test is used to test for TB - ✔✔Sputum
ANSWERS RATED A+
✔✔Which best defines Enhanced Biological Treatment? - ✔✔Control of oxygen is a key
element to operating biological controlled process.
The amount of oxygen available will dictate which microbes will become dominant. (A
and B)
✔✔What is Dissolved Oxygen (DO)? - ✔✔Oxygen is one factor that controls the types
of microbes that are dominant in the system.
The amount of oxygen available will dictate which microbes will become dominant. (a
and B)
✔✔What is the meaning of Pasteurization? - ✔✔A heat process that kills all vegetative
pathogenic bacteria. A pasteurization temperature of 165F is commonly used in the milk
and food industry.
✔✔what is an example of non point source of pollution - ✔✔residential run off
✔✔what rate does not measure risk, the onset time is not relevant and it measures the
number of cases within a population - ✔✔prevalence rate
✔✔what is the correct time and temperature for hot water sanitation - ✔✔170 degrees
for 30 seconds
✔✔which isn't a certified lab test for water? - ✔✔trihalomethanes
✔✔which of the following diseases is resistant to disinfection and is the targeted
organism in pasteurization - ✔✔turberculosis
✔✔organophosphates: - ✔✔inhibit cholinesterase permanently and are non-persistent
(a and B)
, ✔✔final rinse temperature at the manifold in a single tank dishwasher - ✔✔180
✔✔word commonly used to describe dissentary - ✔✔shigella
✔✔space measuring in housing codes - ✔✔square feet per floor space
✔✔instrument to measure suspended particles in the air - ✔✔high volume sampler
✔✔which of the following causative agents of the genus plasmodium is the most
dangerous cause of malaria - ✔✔falciparum
✔✔rabies is caused by: - ✔✔rhabdovirus
✔✔a truck carrying molassses crashes and its contents are emptied into a lake. This
causes a fish kill. What is the most likely reason for the death of the fish? - ✔✔decrease
in the d.o due to increased BOD activity by bacteria
✔✔rotavirus is most likely to affect - ✔✔young children and infants
✔✔which of the following would be considered a non-cleanable surface? - ✔✔pitted pot
✔✔psittacosis is associated with - ✔✔birds
✔✔an individual came down with a case of mumps and a single case of influenza. What
is the difference in resistance? - ✔✔mumps exposure and resistance is lifelong while
influenza resistance is not lifelong due to changing virus characteristics (different
strains)
✔✔hep A virus: - ✔✔can not multiply in food or water. It must multiply in the host.
✔✔A rodent-borne disease or disease caused by an insect carried by a rodent -
✔✔epidemic typhus, endemic typhus or marine typhus
✔✔most common rat in the usa - ✔✔Rattus nervegicus
✔✔sylvatic plague is a disease from - ✔✔wild rodents
✔✔True or false. The pneumonic plague is rodent borne - ✔✔false
✔✔what disease is deadly and transmitted from mice - ✔✔hanta virus
✔✔What kind of test is used to test for TB - ✔✔Sputum
