multiple choice question

RC 742Industrial Hygiene
Exam 2
Questions 1-85, 0.625 points each (3.125 points EC)
Use the answer key and submit it only for grading
1.
Which of these energies is an ionizing form of radiation? (2 points)
a.. x-rays
b. UV
c. IR
d. microwaves
e. radio
2.
Which of these energies is not an ionizing form of radiation? (2 points)
a.. gamma rays
b. alpha particles
c. beta particles
d. UV
e. neutron particles
3.
What are strategies for control of workplace hazards?
a.. engineering
b. administrative
c. PPE
d. substitution
e. all of the above
1
Questions 4-7: possible answers
a. supplied air
c. chemically resistant gloves
e. communication system
g. hard hat
b. encapsulating suit
d. chemically resistant boots
f. safety shoes
List all that are required.
4. Level A ________________________________________________
5. Level B ________________________________________________
6. Level C ________________________________________________
7. Level D ________________________________________________
8. A respirator has a protection factor of 10,000 is must be a:
a.
b.
c.
d.
supplied air respirator
full face negative pressure air purifying respirator
half face negative pressure air purifying respirator
powered air purifying respirator
9. A job entails working with metal shards, but no chemical hazards, which gloves
would you specify?
e.
f.
g.
h.
i.
nitrile
viton
PVC
Kevlar
Neoprene
10. The part of the brain involved thermostatically with heat control is the:
j.
k.
l.
m.
pituitary
medulla
hypothalamus
cortex
2
11. Long COVID can affect many different organ systems
a. True
b. False
12. Long COVID is more prevalent in men (than in women)
a. True
b. False
13. ME/CFS is commonly stimulated by viral diseases and is thought to be relate to
some long hauler’s symptoms.
a. True
B. False
14. A surprise finding is that being old and have comorbidities (other illnesses) does
not influence long COVID.
a. True
b. False
15. As of November 11, 2022, How many COVID-19 cases have been reported in the
U.S. according to Centers for Disease Control and Prevention (CDC). Round to the
nearest million. (Hint: Go to the CDC website)
a.
b.
c.
d.
e.
26 million
39 million
47 million
69 million
98 million
16.-18 Matching
a. 21% b. 20.5% c. 10% d. 5% e. 23.5% f. 22% g. 16% h. 19.5%
j. 25% i. none of the answers
16. What is considered the oxygen deficiency concentration by OSHA? ______
17. What is considered the LEL concentration limit by OSHA? _____
18. What is considered the Oxygen enrichment concentration by OSHA? _____
19. The “best” fit testing protocol for worker protection is:
n.
o.
p.
q.
r.
Quantitative fit testing
Qualitative fit testing
Functional fit testing
Negative pressure fit testing
Seal fit testing
3
20. The quantity of heat required for a phase change from a liquid to a gas without
changing its temperature is called:
a.
Heat of vaporization
b.
Heat of fusion
c.
Enthalpy
d.
Specific heat
e.
Heat capacity
f.
None of the above
21. The transfer of heat that occurs as a result of the movement of a fluid past a
source of heat is called:
a.
Conduction
b.
Convection
c.
Radiation
d.
None of the above.
22. The heat generated as a normal by-product of the body’s activity is called:
a.
Environmental heat
b.
Metabolic heat
c.
Specific heat
d.
Deep heat
e.
None of the above
23. At the base of the brain, a “thermostat,” controls the body’s response to thermal
stresses by initiating certain physiological reactions such as respiration, dialation
and vaporization. At _________ 0F it is depressed.
24. A worker has symptoms of profuse sweating, fatigue, nausea, headache, and
giddiness. His skin is flushed and he appears near fainting. He may be suffering
from:
a.
b.
c.
d.
e.
f.
heat rash
heat cramps
heat exhaustion
heat stroke
heat syncope
none of the above
25. For measuring humidity, one may use a:
a.
b.
c.
d.
e.
f.
black globe thermometer (Vernon globe)
thermoanemometer
sling psychrometer
wet-bulb/dry bulb thermometer apparatus
both c and d
none of the above
4
26. Biological hazards include:
a.
b.
c.
d.
27.
Mold spores have been detected in an indoor air sample. This is an indicator of
an air pollution problem in the building.
a.
b.
28.
viruses
bacteria
fungi
all of the above
true
false
When measuring sound levels we are actually measuring sound pressure.
a.
b.
true
false
29-33. Matching
29. ____ 90 dbA
30. ____ 80 dbA
31. ____ 20,000 Hz
32. ____ 130 dbA
33. ____ 60 dBA
34.
A ____________ adds air to the work room
a.
b.
c.
d.
e.
35.
a. upper limit of frequency for ear sensitivity
c. normal conversation level
d. PEL
e. Action level
f. Threshold of pain
cyclone
settling chamber
supply system
exhaust ventilation system
chemical fume hood
Which is not an advantage of a local exhaust system
a.
b.
c.
d.
e.
Removal of contaminants is near the source
Lower heating costs
Lower costs for air cleaning equipment
More effective as compared to a general exhaust system
All are advantages
5
36. Which of the following items will be considered in the selection of respirators:
a.
b.
c.
d.
e.
effectiveness of the device against the substance of concern
estimated maximum concentration of the substance in the work area
general environment (open shop, confined space, etc.)
level of protection
all of the above
37. Which of the following statements is incorrect?
a. Respirator cartridges are designed to protect against individual or a
combination of potentially hazardous atmospheric contaminants.
b. They are specifically labeled and color-coded to indicate the type and nature
of protection they provide.
c. The NIOSH approval label on the respirator will not specify the maximum
concentration of contaminants for which the canister is approved
d. When breathing difficulty is encountered with a filter respirator, the filter
cartridge(s) must be replaced.
38. Radon is a major contributor to lung cancer.
a.
b.
true
false
39. Mold hazards include all but:
a.
b.
c.
d.
e.
VOCs
Allergens
Prions
Mycotoxins
All of the above are potential mold hazards
40-43. Matching
40. ____White asbestos
a. Crocidolite asbestos
41. ____Brown asbestos
b. Amosite asbestos
42. ____Blue asbestos
c. Chrysotile asbestos
43. ____Contaminate in many ores
d. Tremolite asbestos
6
44. Chrysotile asbestos is an amphibole asbestos type.
a. True
b. false
45. Tremolite asbestos is a serpentine asbestos type.
a. True
b. false
46. A class of electromagnetic photons emitted from the nuclei of radioactive atoms that
are highly penetrating and present an external radiation exposure hazard.
a.
Alpha-particles
b.
Beta-particles
c.
Gamma-rays
d.
X-rays
e.
Neutrons
f.
Radon
47. Small electrically charged particles emitted from the nucleus of radioactive atoms that
are identical to electrons. They are emitted with various kinetic energies and pose an
internal exposure hazard and are often penetrating enough to cause skin burns.
a. Alpha-particles
b. Beta-particles
c. Gamma-rays
d. X-rays
e. Neutrons
f. Radon
48. A radioactive problem encountered by homeowners in many parts of the country
involves:
a. Alpha-particles
b. Beta-particles
c. Gamma-rays
d. X-rays
e. Neutrons
f. Radon
49. “Helium packets”
a. Alpha-particles
b. Beta-particles
c. Gamma-rays
d. X-rays
e. Neutrons
f. Radon
7
50. The rule of thumb for radiation protection is:
g. time and distance
h. distance and shielding
i. concentration and time
j. time, distance and shielding
k. concentration, time, distance and shielding.
51. – 68. Matching (each answer has a best match – no duplicates)
a. LEL (LFL), b. ozone, c. 1.0 d. flashpoint, e. < 1.0 µm, f. mists, g. turbulence, h. viscosity, i. combustibility, j. HF & HCl, k. molds & fungi, l. dusts, m. smoke, n. fume, o. UEL (UFL), p. fiber, q. Reynolds number, r. Brownian motion 51. _____ particles formed photochemically 52. _____ particles formed from volcanic activity 53. _____biological airborne contaminants 54. _____specific gravity of air 55. _____property of a gas or fluid to resist flow 56. _____concentration supports combustion 57. _____minimum concentration which a liquid’s vapor will ignite 58. _____minimum concentration a vapor or gas will burn 59. _____maximum concentration a vapor or gas will burn 60. _____formed by mechanical action 61. _____a particle formed from a change in state by a chemical or physical process 62. _____a particle formed product of incomplete combustion of organic materials 63. _____has an aspect ratio at least 3 to 1. 64. _____particles formed from liquid droplets 65. _____particles that can be retained by lung alveoli 66. _____describes turbulence and drag on a particle 67. _____eddies of air retard the flow of particles 68. _____keeps submicron particles in suspension 69. Which of the following does not cause an initial dispersion of particles in air a. b. c. d. e. f. g. Mechanical Shattering Splash Turbulence Thermal convection Secondary air movement (entrapment) All of these can cause dispersion 8 70. Which is not a type of IH sampling strategy? a. b. c. d. Bulk Reverse Area Personal 71. _____ One of the biggest advantages of real time sampling is the instant feedback the hygienist receives. a. True b. False 72. ____Evidence-based practice is all about certainties. a. True b. False 73. _____The four sources of evidence-based practice do not include: a. Advertising b. Scientific literature c. Practitioners d. Organizations e. Stakeholders 74. _____The six steps of evidence-based practice are cyclic. a. True b. False 75. ____The three types of research design are qualitative, quantitative and mixed. a. True b. False 76. ____A systematic review is without bias because of its rigor. a. True b. False 77. ____Which of these statements is false a. The bloodborne pathogens standard pertains to all occupational exposure to blood and other potentially infectious agents b. Hepatitis B and HIV/AIDs are bloodborne diseases c. Bloodborne control measures are needed for cuts and open wounds only d. Standard precautions shall be observed to prevent contact with blood and other potentially infectious agents e. All body fluids shall be considered potentially infectious materials 78. _____Both contaminated laundry and contaminated sharps are a regulated wastes. a. True b. False 9 79. _____How many years after employment must medical records be maintained by the employer? 80. Which is the term for the amount of risk that individuals are willing to tolerate? a. Reasonable risk b. Acceptable risk c. Both a & b 81. Risks are lowered by reducing any component of risk. a. True b. False 82. The Four Steps of Risk Analysis are Source identification, Risk assessment, Risk management and Risk communication. a. True b. False 83. The Four stages of risk assessment are Source identification, Dose response assessment, Exposure assessment, and Risk Management. a. True b. False 84. HACCP is a risk analysis model. a. True b. False 85. The three risk categories for HACCP are highest risk, lowest risk, no risk. a. True b. False 10