1. A factor or agent which increases the risk of cancer is known as a
a. teratogen
b. mutagen
c. carcinogen
d. fomite - correct answer
... [Show More] 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 answer homicide
3. In recent years, the largest number of rabies cases were associated with
a. skunks
b. bats
c. dogs
d. raccons. - correct answer skunks
4. Asbestosis is caused by fine silicate fibers retained in the
a. kidneys
b. lungs
c. colon
d. abdomen - correct answer 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 answer a communicable disease
6. Rocky mountain spotted fever is spread by
a. flies
b. spiders
c. cockroaches
d. ticks - correct answer ticks
7. Mycotoxins are poisonous chemicals produced by
a. bacteria
b. vertebrates
c. viruses
d. fungi - correct answer fungi
8. The study of the occurrence, frequency, and distribution of disease is
a. entomology
b. biology
c. endocrinology
d. epidemiology - correct answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer 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 answer cation exchange capacity
28. Bacteria that require oxygen for their growth are called
a. anaerobic bacteria
b. aerobic bacteria
c. viruses
d. fungi - correct answer 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
D. Non-infectious agents
E. None of the above - correct answer parasitic infections
30. If you are counseling a pregnant patient, what foods should she avoid to decrease her risk for listeriosis?
A. Honey
B. Fresh soft cheese
C. Sauerkraut
D. Cooked mushrooms
E. Caffeine - correct answer fresh soft cheese
31. Which scenario(s) may present a risk to immunocompromized patients.
A. Animals in the Home Use
B. Coming in contact with individuals after they have been given a live virus vaccine.
C. Eating raw oysters
D. Drinking non-pasteurized juices or unchlorinated water
E. All of the above - correct answer all of the above
32. What food borne illness may present with chocolate-brown colored blood?
A. Nitrite poisoning
B. Organophosphate poisoning
C. Botulism
D. Mercury poisoning
E. Tin poisoning - correct answer nitrite poisoning
33. Approximately how many people die per year in the U.S. of food-borne illness?
A. 5,000
B. 100
C. 9,000
D. 100,000
E. 50 - correct answer 5,000
34. In the U.S. the pioneering Pure Food and Drug Act was passed in 1906 stimulated by journalistic exposures of inferior conditions in the food industry and by Upton Sinclair's 1906 novel titled?
A. Silent Spring
B. The Coming Plague
C. To Kill a Mockingbird
D. The Jungle
E. The Catcher in the Rye - correct answer The Jungle
35. Which bacteria in large numbers can survive extended storage in cheddar cheese?
a) Salmonella
b) Brucella sp.
c) Shigella
d) Clostridium perfringens - correct answer 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 - correct answer 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 - correct answer 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. - correct answer 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 - correct answer 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 - correct answer 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. - correct answer 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 - correct answer 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
d. 1800o to 1900o F - correct answer 1500 to 1800 F
44. A landfill site should not
a. be located near a major highway
b. be given and attractive entrance and approach road
c. house equipment on site
d. be inexcessible during bad weather conditions - correct answer be inexcessible during bad weather conditions
45. Determining what a landfill can be used for when completed should be planned
a. when the landfill is half full
b. before you build the landfill
c. when the landfill is full
d. any time during the operation of the landfill - correct answer before you build the landfill
46. Hazardous waste is governed by the
a. Clean Air Act
b. Occupational Safety and Health Act
c. Resource and Conservation and Recovery Act
d. Food and Drug Act - correct answer Resource and Conservation and Recovery Act
47. Which of the following is not a characteristic of hazardous waste?
a. ignitability
b. corrosivity
c. reactivity
d. combustibility - correct answer combustibility
48. The EPA requires that dioxin-bearing wastes be ________ destroyed or reduced before [Show Less]