REHS EXAM AND A+ VERIFIED ANSWERS.
1. A factor or agent which increases the risk of cancer is known as a
a. teratogen
b. mutagen
c. carcinogen
d. fomite correct answers 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 correct answers homicide
3. In recent years, the largest number of rabies cases were associated with
a. skunks
b. bats
c. dogs
d. raccons. correct answers skunks
4. Asbestosis is caused by fine silicate fibers retained in the
a. kidneys
b. lungs
c. colon
d. abdomen correct answers 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 correct answers a communicable disease
6. Rocky mountain spotted fever is spread by
a. flies
b. spiders
c. cockroaches
d. ticks correct answers ticks
7. Mycotoxins are poisonous chemicals produced by
a. bacteria
b. vertebrates
c. viruses
d. fungi correct answers fungi
8. The study of the occurrence, frequency, and distribution of disease is
a. entomology
b. biology
,c. endocrinology
d. epidemiology correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers chlorine
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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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
b. texture
c. cation exchange capacity
d. granular structure correct answers cation exchange capacity
28. Bacteria that require oxygen for their growth are called
a. anaerobic bacteria
b. aerobic bacteria
c. viruses
d. fungi correct answers aerobic bacteria
29. The examination of the stool for cysts and/or ova is the common diagnosis for which food
borne pathogen?
A. Parasitic infections
B. Viral infections
C. Bacterial infections
1. A factor or agent which increases the risk of cancer is known as a
a. teratogen
b. mutagen
c. carcinogen
d. fomite correct answers 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 correct answers homicide
3. In recent years, the largest number of rabies cases were associated with
a. skunks
b. bats
c. dogs
d. raccons. correct answers skunks
4. Asbestosis is caused by fine silicate fibers retained in the
a. kidneys
b. lungs
c. colon
d. abdomen correct answers 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 correct answers a communicable disease
6. Rocky mountain spotted fever is spread by
a. flies
b. spiders
c. cockroaches
d. ticks correct answers ticks
7. Mycotoxins are poisonous chemicals produced by
a. bacteria
b. vertebrates
c. viruses
d. fungi correct answers fungi
8. The study of the occurrence, frequency, and distribution of disease is
a. entomology
b. biology
,c. endocrinology
d. epidemiology correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers chlorine
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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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 correct answers 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
b. texture
c. cation exchange capacity
d. granular structure correct answers cation exchange capacity
28. Bacteria that require oxygen for their growth are called
a. anaerobic bacteria
b. aerobic bacteria
c. viruses
d. fungi correct answers aerobic bacteria
29. The examination of the stool for cysts and/or ova is the common diagnosis for which food
borne pathogen?
A. Parasitic infections
B. Viral infections
C. Bacterial infections
