REHS EXAM (ACTUAL 2025/2026) QUESTIONS WITH 100%
VERIFIED CORRECT ANSWERS | LATEST VERSION
1. A factor or agent which increases the risk of cancer is known as a
a. teratogen
b. mutagen
c. carcinogen
d. fomite
carcinogen
2. The four major causes of death among all age groups of Americans
include all of the following
except.
a. homicide
b. accidents
c. malignant neoplasms
d. heart disease
homicide
35. Which bacteria in large numbers can survive extended storage in
cheddar cheese?
a) Salmonella
b) Brucella sp.
,c) Shigella
d) Clostridium perfringens
Salmonella
36. Which of the following is non-toxic to aquatic organisms, a good
viricide, and adds oxygen to treated
wastewater effluents?
a. ozone
b. calcium hypochlorine
c. sulfur dioxide
d. chlorine dioxide
ozone
37. The typical limitation of use of the septic tank absorption field
system is due to
a. cost
b. land use considerations
c. soil type and size requirements
d. appearance
soil type and size requirements
38. Which of the following is true about disposal of animal wastes?
,a. If wet manure is plowed under, fly eggs present will not hatch.
b. Composting of manure takes advantage of the inclination that
larvae move out and away from moist
manure in search of a dry place to pupate.
c. Where a small number of animals are kept, the manure should be
collected once a week.
d. Odors associated with the handling and disposal of these wastes do
not determine the disposal method
or its location.
composting of manure takes advantage of the inclination that larvae
move out and away from moist manure in search of a dry place to
pupate
39. Resource recovery and reduction of solid wastes should start
a. at the point of generation
b. at the sanitary landfill
c. in the home
d. at the transfer station
at the point of generation
40. ______can be recovered from refuse by burning it in a refractory
lined incineration or water-wall incinerator.
a. glass
b. aluminum
c. ferrous metal
, d. energy
energy
41. Incinerators are rated in terms of
a. percent fuel capacity per day
b. BTU's per day
c. tons of burnable waste per day
d. cubic feet of solid waste per day.
tons of burnable waste per day
42. The three essentials for combustion in an incinerator are
a. temperature, time and heat
b. time, temperature and moisture
c. temperature, heat and fuel
d. time, temperature and turbulence
time, temperature and turbulence
43. The second step of the combustion process in an incinerator
requires a high temperature of at least
a. 1500o to 1600oF
b. 1500o to 1800o F
c. 1900o to 2000o F
VERIFIED CORRECT ANSWERS | LATEST VERSION
1. A factor or agent which increases the risk of cancer is known as a
a. teratogen
b. mutagen
c. carcinogen
d. fomite
carcinogen
2. The four major causes of death among all age groups of Americans
include all of the following
except.
a. homicide
b. accidents
c. malignant neoplasms
d. heart disease
homicide
35. Which bacteria in large numbers can survive extended storage in
cheddar cheese?
a) Salmonella
b) Brucella sp.
,c) Shigella
d) Clostridium perfringens
Salmonella
36. Which of the following is non-toxic to aquatic organisms, a good
viricide, and adds oxygen to treated
wastewater effluents?
a. ozone
b. calcium hypochlorine
c. sulfur dioxide
d. chlorine dioxide
ozone
37. The typical limitation of use of the septic tank absorption field
system is due to
a. cost
b. land use considerations
c. soil type and size requirements
d. appearance
soil type and size requirements
38. Which of the following is true about disposal of animal wastes?
,a. If wet manure is plowed under, fly eggs present will not hatch.
b. Composting of manure takes advantage of the inclination that
larvae move out and away from moist
manure in search of a dry place to pupate.
c. Where a small number of animals are kept, the manure should be
collected once a week.
d. Odors associated with the handling and disposal of these wastes do
not determine the disposal method
or its location.
composting of manure takes advantage of the inclination that larvae
move out and away from moist manure in search of a dry place to
pupate
39. Resource recovery and reduction of solid wastes should start
a. at the point of generation
b. at the sanitary landfill
c. in the home
d. at the transfer station
at the point of generation
40. ______can be recovered from refuse by burning it in a refractory
lined incineration or water-wall incinerator.
a. glass
b. aluminum
c. ferrous metal
, d. energy
energy
41. Incinerators are rated in terms of
a. percent fuel capacity per day
b. BTU's per day
c. tons of burnable waste per day
d. cubic feet of solid waste per day.
tons of burnable waste per day
42. The three essentials for combustion in an incinerator are
a. temperature, time and heat
b. time, temperature and moisture
c. temperature, heat and fuel
d. time, temperature and turbulence
time, temperature and turbulence
43. The second step of the combustion process in an incinerator
requires a high temperature of at least
a. 1500o to 1600oF
b. 1500o to 1800o F
c. 1900o to 2000o F
