REHS exam
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
3. In recent years, the largest number of rabies cases were associated with
a. skunks
b. bats
c. dogs
d. raccons.
skunks
4. Asbestosis is caused by fine silicate fibers retained in the
a. kidneys
b. lungs
c. colon
d. abdomen
lungs
5. An illness due to a specific infectious agent or its toxic product which is transmitted
from a
reservoir to a susceptible host either directly or indirectly is called
a. an infectious disease
b. a communicable disease
c. a genetic disease
d. a noncommunicable disease
a communicable disease
6. Rocky mountain spotted fever is spread by
a. flies
b. spiders
c. cockroaches
d. ticks
ticks
7. Mycotoxins are poisonous chemicals produced by
a. bacteria
b. vertebrates
,c. viruses
d. fungi
fungi
8. The study of the occurrence, frequency, and distribution of disease is
a. entomology
b. biology
c. endocrinology
d. epidemiology
epidemiology
9. Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate
past or possibly intermittent pollution?
a. fecal streptococci
b. escherichia coli
c. aerobacter aerogenes
d. clostridium sporulates
clostridium sporulates
10. Engineering controls are
a. controls that isolate or remove hazards from the work place
b. less effective than good training
c. the last option that should be considered
d. less effective than personal protection processes
controls that isolate or remove hazards from the workplace
11. Which of the following is not considered a satisfactory solution to the problem of
chemical contamination in
Well systems?
a. abandoning the well
b. boiling the water
c. building a new, properly constructed, drilled well
boiling the water
12. Which of the following chemicals is most widely used to destroy microorganisms?
a. chlorine
b. copper sulfate
c. chloramine
d. hydrogen sulfate
chlorine
00:0201:11
13. Which of the following is not a practical method for removal of cadmium?
a. ion exchange
b. lime softening
c. reverse osmosis
d. iron coagulation
reverse osmosis
14. Which of the following is not a commonly accepted method of device to prevent
backsiphonage?
a. vacuum breakers
,b. cross-connections
c. air gap separation
d. back pressure units
cross-connections
15. This substance is the first product of the decomposition of organic matter. Its
presence in water usually
Indicates "fresh pollution" of sanitary significance. What is it?
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
ammonia
16. One of the most common reasons for the contamination of wells drilled through
rock, clay, or hardpan is
a. seepage of pollutants through soil
b. failure to seal well casings properly
c. porosity of the rock
d. use of inferior quality well casings
failure to seal well casings properly
17. In emergencies, small quantities of water can be disinfected by boiling or using
a. aluminum salts
b. tincture of iodine
c. salt tablets
d. direct exposure to sunlight for 22 hours
tincture of iodine
18. Back flow of nonpotable materials into the potable water system may occur by
a. back pressure
b. backsiphonage
c. vacuum in the volume
d. a and b above
a and b above
19. Which of the following statements should not be a consideration in locating a
groundwater supply?
a. the probable travel of pollution through the ground
b. the well construction practices and standards
c. the sanitary seal provided at the point where the pump lines pass out of the casing
d. the distance that the water will need to travel
the distance that the water will need to travel
20. It is known that some common pathogenic organisms found in wastewater will
survive more than
of harsh temperature extremes
a. 2 months
b. 5 months
c. 2 years
d. 5 years
2 years
, 21. A storm sewer is used to
a. remove rain or other standing surface water
b. remove sewage and storm water
c. remove household water waste and gutter drain water
d. remove non-toxic, non-hazardous wastewater
remove rain or other standing surface water
22. Stream pollution is sometimes apparent by
a. increased levels of available oxygen in the water
b. a zone of degradation
c. large numbers of crayfish and cristivomer species
d. large numbers of small fish
a zone of degradation
23. If the septic tank will also have a garbage disposal unit feeding into it
a. the size of the tank would be increased by 50 percent
b. the tank should have an agiator
c. the tank should not be equipped with a gas baffle
d. the tank should not be constructed with precast concrete
the size of the tank would be increased by 50 percent
24. How often should a septic tank for a private home be serviced?
a. every year
b. every 5 to 10 years
c. every 3 to 5 years
d. every 10 years
every 3 to 5 years
25. Plants absorb certain constituents of wastewater, using wastewater for irrigation of
consumable plant products
may present a health hazard to humans if the water contains
a. nitrates
b. iron
c. cadmium
d. chlorides
cadmium
26. A measure of the relativity constant rate at which clear water, maintained at a
relatively constant depth, will
seep out of a standard size test hole that has been previously saturated is the
a. hydraulic conductivity
b. soil permeability test
c. soil percolation test
d. Baird-Parker saturation test
soil percolation test
27. The ability of a soil to absorb and allow water and air to pass through is related to all
of the following except
a. chemical composition
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
3. In recent years, the largest number of rabies cases were associated with
a. skunks
b. bats
c. dogs
d. raccons.
skunks
4. Asbestosis is caused by fine silicate fibers retained in the
a. kidneys
b. lungs
c. colon
d. abdomen
lungs
5. An illness due to a specific infectious agent or its toxic product which is transmitted
from a
reservoir to a susceptible host either directly or indirectly is called
a. an infectious disease
b. a communicable disease
c. a genetic disease
d. a noncommunicable disease
a communicable disease
6. Rocky mountain spotted fever is spread by
a. flies
b. spiders
c. cockroaches
d. ticks
ticks
7. Mycotoxins are poisonous chemicals produced by
a. bacteria
b. vertebrates
,c. viruses
d. fungi
fungi
8. The study of the occurrence, frequency, and distribution of disease is
a. entomology
b. biology
c. endocrinology
d. epidemiology
epidemiology
9. Which of the following organisms are most resistant to unfavorable environmental
conditions and indicate
past or possibly intermittent pollution?
a. fecal streptococci
b. escherichia coli
c. aerobacter aerogenes
d. clostridium sporulates
clostridium sporulates
10. Engineering controls are
a. controls that isolate or remove hazards from the work place
b. less effective than good training
c. the last option that should be considered
d. less effective than personal protection processes
controls that isolate or remove hazards from the workplace
11. Which of the following is not considered a satisfactory solution to the problem of
chemical contamination in
Well systems?
a. abandoning the well
b. boiling the water
c. building a new, properly constructed, drilled well
boiling the water
12. Which of the following chemicals is most widely used to destroy microorganisms?
a. chlorine
b. copper sulfate
c. chloramine
d. hydrogen sulfate
chlorine
00:0201:11
13. Which of the following is not a practical method for removal of cadmium?
a. ion exchange
b. lime softening
c. reverse osmosis
d. iron coagulation
reverse osmosis
14. Which of the following is not a commonly accepted method of device to prevent
backsiphonage?
a. vacuum breakers
,b. cross-connections
c. air gap separation
d. back pressure units
cross-connections
15. This substance is the first product of the decomposition of organic matter. Its
presence in water usually
Indicates "fresh pollution" of sanitary significance. What is it?
a. ammonia
b. sugar
c. carbon dioxide
d. hydrogen sulfide
ammonia
16. One of the most common reasons for the contamination of wells drilled through
rock, clay, or hardpan is
a. seepage of pollutants through soil
b. failure to seal well casings properly
c. porosity of the rock
d. use of inferior quality well casings
failure to seal well casings properly
17. In emergencies, small quantities of water can be disinfected by boiling or using
a. aluminum salts
b. tincture of iodine
c. salt tablets
d. direct exposure to sunlight for 22 hours
tincture of iodine
18. Back flow of nonpotable materials into the potable water system may occur by
a. back pressure
b. backsiphonage
c. vacuum in the volume
d. a and b above
a and b above
19. Which of the following statements should not be a consideration in locating a
groundwater supply?
a. the probable travel of pollution through the ground
b. the well construction practices and standards
c. the sanitary seal provided at the point where the pump lines pass out of the casing
d. the distance that the water will need to travel
the distance that the water will need to travel
20. It is known that some common pathogenic organisms found in wastewater will
survive more than
of harsh temperature extremes
a. 2 months
b. 5 months
c. 2 years
d. 5 years
2 years
, 21. A storm sewer is used to
a. remove rain or other standing surface water
b. remove sewage and storm water
c. remove household water waste and gutter drain water
d. remove non-toxic, non-hazardous wastewater
remove rain or other standing surface water
22. Stream pollution is sometimes apparent by
a. increased levels of available oxygen in the water
b. a zone of degradation
c. large numbers of crayfish and cristivomer species
d. large numbers of small fish
a zone of degradation
23. If the septic tank will also have a garbage disposal unit feeding into it
a. the size of the tank would be increased by 50 percent
b. the tank should have an agiator
c. the tank should not be equipped with a gas baffle
d. the tank should not be constructed with precast concrete
the size of the tank would be increased by 50 percent
24. How often should a septic tank for a private home be serviced?
a. every year
b. every 5 to 10 years
c. every 3 to 5 years
d. every 10 years
every 3 to 5 years
25. Plants absorb certain constituents of wastewater, using wastewater for irrigation of
consumable plant products
may present a health hazard to humans if the water contains
a. nitrates
b. iron
c. cadmium
d. chlorides
cadmium
26. A measure of the relativity constant rate at which clear water, maintained at a
relatively constant depth, will
seep out of a standard size test hole that has been previously saturated is the
a. hydraulic conductivity
b. soil permeability test
c. soil percolation test
d. Baird-Parker saturation test
soil percolation test
27. The ability of a soil to absorb and allow water and air to pass through is related to all
of the following except
a. chemical composition
