Question 1

Discuss commonalities in regards to the origins, effects, and control of the four types of physical agents.

Accepted Answer

All physical agents are related to sources of energy-noise comes from sound waves, vibration from objects in motion (kinetic energy), radiation from electromagnetic energy, and thermal stress from thermodynamic energy.
All physical agents can cause a range of injuries and illnesses from minor to severe, e.g. annoyance to complete hearing loss, minor cut to amputation, cataracts to death, numb fingers to frostbite.
The control of all physical agents follows the source-path-human strategy. The first line of defence is to remove the source, if possible, through engineering and administrative controls. The second line of defence is to block the path (move the worker away) from the source through engineering and administrative controls and PPE. If these are not successful or viable then the last line of defence is to protect the human through personal protective equipment.

Question 2

Akanksha is a dental hygienist who cleans patients' teeth for 35 hours a week. What is the most realistic way of minimizing segmental vibration from the electric polishing brush?

Accepted Answer

A)  using a manual polishing brush
B)  reducing the number of patients that she sees
C)  loosening her grip on the polishing brush
D)  adding padding to the handle of the brush D

Question 3

When assessing the impact of vibration on employee health which of the following is NOT evaluated?

Accepted Answer

A)  the source of the vibration energy
B)  the intensity and frequency of the vibration
C)  the part of the body that receives the vibration energy
D)  the duration of exposure to the vibration A

Question 4

What statistical value should Aiko look at to compare the hearing protection of various devices on the market?

Accepted Answer

A)  dB(
A)  
B)  Hz
C)  watt
D)  NRR

Question 5

What condition is an employee likely experiencing if he or she reports tingling in the fingers, loss of sensation in the fingers, and loss of grip strength?

Accepted Answer

A)  HAVS
B)  hyperpyrexia
C)  hyperreflexia
D)  neuritis

Question 6

Hyperreflexia can be caused by noise.

Accepted Answer

A) True 
 B)False

Question 7

Imagine a large-scale kitchen operation such as the Mandarin, Boston Pizza, or Swiss Chalet. Even though restaurant customers might experience a relatively quiet, comfortable, and relaxing atmosphere out front, in the kitchen area there are many physical agents that can impair the safety and health of kitchen workers and servers.
-There are four mechanical dishwashers in the kitchen running at the following sound ratings: 82 dB, 84 dB, 86 dB, and 88 dB. A 2 dB difference translates to a noise factor increase of 2.1 dB, a 4 dB difference to a factor of 1.5, and a 6 dB difference to a factor of 1.0. Given this information, what is the total noise level coming from the dishwashers?

Accepted Answer

A)  85.0 dB
B)  86.1 dB
C)  87.5 dB
D)  89.0 dB

Question 8

Describe several factors that the Canadian Forces would have to take into account in developing a cold-weather occupational health and safety strategy for Forces members working at bases in the northernmost territories of Canada (Yukon, Northwest Territory, and Nunavut).

Accepted Answer

The answer of Describe several factors that the Canadian Forces...

Question 9

While at work, Zamboni drivers who resurface the ice in hockey arenas are more likely to have lower blood pressure than athletic trainers working in arena dressing rooms.

Accepted Answer

A) True 
 B)False

Question 10

Rick is the supervisor of a road crew working on highway resurfacing. What administrative control would help his workers acclimatize to working in the heat?

Accepted Answer

A)  a heat stress assessment
B)  reduced worker activity
C)  cooling vests
D)  mandatory water break policy

Question 11

Which of the following is commonly the cause of Reynaud's phenomenon?

Accepted Answer

A)  thermal stress
B)  vibration
C)  noise
D)  radiation

Question 12

Non-ionizing radiation is a hospital scanner as ionizing radiation is to

Accepted Answer

A)  nuclear power generation.
B)  lightening.
C)  radon.
D)  a microwave oven.

Question 13

Vasoconstriction affects the bronchial tubes.

Accepted Answer

A) True 
 B)False

Question 14

The effects of radiation depend on the frequency of radiation.

Accepted Answer

A) True 
 B)False

Question 15

Describe the legal steps an employer/HRM must take to control hazardous noise in the workplace. What is the most effective noise control method?

Accepted Answer

The answer of Describe the legal steps an employer/HRM must...

Question 16

HAVS is an acronym for which of the following syndromes?

Accepted Answer

A)  hearing adherence vibration syndrome
B)  hearing accumulation vibration syndrome
C)  hearing avocation vibration syndrome
D)  hand-arm vibration syndrome

Question 17

At what core body temperature does mild hypothermia start to set in?

Accepted Answer

A)  23.9oC to 25.6o C
B)  32.2oC to 30oC
C)  37.2oC to 36.1oC
D)  35oC to 33.9oC

Question 18

According to the textbook a Canadian study found that approximately ______ million Canadians age 20-79 had hearing loss?

Accepted Answer

A)  2.6
B)  3.5
C)  4.6
D)  6.0

Question 19

Conductive hearing loss can be caused by a buildup of ear wax from the improper use of ear plugs.

Accepted Answer

A) True 
 B)False

Question 20

Gemma is employed as a seamstress for a family-run business located in the basement of the owner's house. Gemma should be concerned about which of the following?

Accepted Answer

A)  whole body vibration
B)  low frequency radiation
C)  radon
D)  homeostasis

Exam 5: Physical Agents

Discuss commonalities in regards to the origins, effects, and control of the four types of physical agents.

Akanksha is a dental hygienist who cleans patients' teeth for 35 hours a week. What is the most realistic way of minimizing segmental vibration from the electric polishing brush?

When assessing the impact of vibration on employee health which of the following is NOT evaluated?

What statistical value should Aiko look at to compare the hearing protection of various devices on the market?

What condition is an employee likely experiencing if he or she reports tingling in the fingers, loss of sensation in the fingers, and loss of grip strength?

Hyperreflexia can be caused by noise.

Describe several factors that the Canadian Forces would have to take into account in developing a cold-weather occupational health and safety strategy for Forces members working at bases in the northernmost territories of Canada (Yukon, Northwest Territory, and Nunavut).

While at work, Zamboni drivers who resurface the ice in hockey arenas are more likely to have lower blood pressure than athletic trainers working in arena dressing rooms.

Rick is the supervisor of a road crew working on highway resurfacing. What administrative control would help his workers acclimatize to working in the heat?

Which of the following is commonly the cause of Reynaud's phenomenon?

Non-ionizing radiation is a hospital scanner as ionizing radiation is to

Vasoconstriction affects the bronchial tubes.

The effects of radiation depend on the frequency of radiation.

Describe the legal steps an employer/HRM must take to control hazardous noise in the workplace. What is the most effective noise control method?

HAVS is an acronym for which of the following syndromes?

At what core body temperature does mild hypothermia start to set in?

According to the textbook a Canadian study found that approximately ______ million Canadians age 20-79 had hearing loss?

Conductive hearing loss can be caused by a buildup of ear wax from the improper use of ear plugs.

Gemma is employed as a seamstress for a family-run business located in the basement of the owner's house. Gemma should be concerned about which of the following?