Deck 5: Physical Agents

Question 1

School boards can generate the "free field effect" for teachers by taking what action?

A) requiring open classroom windows
B) installing white noise machines
C) having longer recess and lunch periods
D) making teachers close classroom doors

Answer 1

having longer recess and lunch periods

Question 2

Long-distance truck drivers could be subject to what whole-body vibration related problem as a result of sitting over or near the engine for long periods of time?

A) Raynaud's phenomenon
B) impaired vision
C) sore joints
D) muscle atrophy

Answer 2

impaired vision

Question 3

What heat-related condition could you resolve by giving workers salty crackers along with some water?

A) heat stroke
B) heat syncope
C) heat cramps
D) heat hyperpyrexia

Answer 3

heat cramps

Question 4

Marguerite turns up the sound on her computer speakers by 3 dB to play her favourite song. How much louder would this sound be to Genevieve who is in the next cubicle next?

A) just as loud
B) twice as loud
C) three times as loud
D) five times as loud

Question 5

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

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

Question 6

What two basic types of physiological damage can create hearing loss?

A) trauma and infection
B) sensorineural and infection
C) conductive and sensorineural
D) trauma and conductive

Question 7

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?

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

Question 8

What three characteristics is the human hearing response conditional on?

A) duration, standards, and loudness
B) loudness, duration, and level
C) frequency, standards, and level
D) frequency, duration, and loudness

Question 9

What type of non-ionizing radiation is more likely to cause damage to the retina of the eye?

A) high-energy X-rays
B) far infrared radiation
C) short ultraviolet radiation
D) long ultraviolet radiation

Question 10

What has research to date indicated about the use of cellphones and the risk of brain cancer?

A) Cancer risk is unclear.
B) Cancer risk varies with gender.
C) Cancer risk varies with age of the cellphone.
D) Cancer risk varies with amount of usage.

Question 11

Which of the following devices emits ionizing radiation?

A) computer monitor
B) fluorescent light
C) tanning bed
D) hospital scanner

Question 12

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?

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

Question 13

In what situation could frostbite happen as quickly as frostnip?

A) when the temperature is below -30 degrees C.
B) when the worker has inadequate hand and foot protection
C) when the worker is exposed to cold compressed gas
D) none because frostbite takes more time to develop than frostnip

Question 14

In the equation for thermal stress, what does the character M stand for?

A) body mass
B) metabolic heat production
C) metabolism
D) mechanical energy

Question 15

In what three ways can noise affect humans?

A) cognitive effects, sensorineural damage, and sociological effects
B) physiological damage, physiological effects, and psychological effects
C) sociological damage, psychological effects, and sensorineural damage
D) physiological effects, sociological effects, and cognitive damage

Question 16

From which source could a chef or sous chef (preparation cook) be exposed to ionizing radiation?

A) microwave oven
B) kitchen computer
C) vegetables
D) aluminium pan

Question 17

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

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

Question 18

According to the Canadian Centre for Occupational Health and Safety, when might a workplace be too noisy?

A) when employees stop going out after work
B) when employees have chronic ear infections
C) when employees have a general feeling of fatigue
D) when numerous employees have hearing problems

Question 19

The effect of noise exposure in the workplace is measured using what type of device?

A) dosimeter
B) audiometer
C) octave band analyzer
D) sound pressure level meter

Question 20

If a kitchen worker gets locked into the walk-in freezer either by accident or by a misguided prank, when you finally find them, what symptom would tell you that he or she is suffering from moderate hypothermia?

A) intense pain in fingers
B) abnormal drowsiness
C) decreased respiration
D) irrational behaviour

Question 21

Engineers working in the engine room of a cruise ship are more likely to experience segmental vibration than chefs working in the cruise ship kitchen.

Question 22

The heat level in a crowded room or subway car rises due to convection.

Question 23

Ear muffs are more costly but more comfortable than earplugs.

Question 24

The eye is the primary organ at risk from ionizing radiation.

Question 25

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.

Question 26

The kitchen has a number of large floor-standing mixers for mixing large batches of cake and bread dough. The frequency of these mixers is 75 Hz. What part of the body would be affected by resonance at this frequency?

A) head
B) Eyeballs
C) shoulder
D) arms

Question 27

Dog trainers can experience hearing loss from using a "silent" dog whistle.

Question 28

As their popularity increases, the move from playing in small clubs to playing in large stadiums can produce tinnitus for band members if they are not careful.

Question 29

If a roofer is suffering from hyperpyrexia after installing replacement shingles for eight hours in the hot sun their skin will be dry and tight.

Question 30

To measure the gross noise level in the casino, the casino's health and safety manager, Kamran, will use a sound pressure level meter.

Question 31

Marlee is a hard-of-hearing worker in a candy factory. Her supervisor can assume that she does not need the same types of hearing protection as the other workers.