REHS Exam 240 Questions and Answers |
Complete Guide with Verified Solutions |
Grade A+
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
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
Complete Guide with Verified Solutions |
Grade A+
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
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
