OHS Final Exam questions well
answered passed
Physical Agents - correct answer ✔✔Sources of energy that may cause injury or disease
Ambient - correct answer ✔✔-All-encompassing condition associated with a given environment
-Composite of inputs from sources all around us
Noise - correct answer ✔✔-any unwanted noise
-standards for measurement: decibel (dB)
Threshold of hearing - correct answer ✔✔Range of sound that human ear can perceive or hear
Hearing response conditional on three characteristics - correct answer ✔✔-Frequency
-Duration
-Loudness
Types of Hearing Loss - correct answer ✔✔-Physiological Damage
-Temporary Threshold Shift (TTS)
-Permanent Threshold Shift
Physiological Damage - correct answer ✔✔1)Conductive Hearing Loss: Restricts transmission of
sound to cochlea or inner ear
2)Sensorineural Hearing Loss (Nerve Deafness): Affects the cochlea and is usually irreversible
,Temporary Threshold Shift - correct answer ✔✔-gradual hearing loss
-can sometimes be reversed by removal from noise source
Permanent Threshold Shift - correct answer ✔✔Hearing disability that is permanent and may
not be correctable
Signs of Hearing Loss - correct answer ✔✔-Indications of exposure to excessive noise levels
-Early warning change
Indications of Exposure to Excessive Noise Levels - correct answer ✔✔-ringing in ears (tinnitus)
-raising volume on radio or television
Early Warning Change - correct answer ✔✔-deterioration of hearing in upper frequency
-the earliest detectable sign of noise-induced hearing loss
Control Noise at the Source - correct answer ✔✔-add sound-absorbing materials
-place vibration padding under it
-redesign the operation so the machine performs differently
-isolate machine in separate room or sound-deadening enclosure
-purchase a new machine
Control Noise at the Path - correct answer ✔✔-Move worker away from source and/or erect
sound barriers between noise and worker
-As the distance from the sound source is doubled, the noise level will drop by a fixed amount
-Attenuation: Reduction of noise at one location compared with another farther from the
source
,Noise control at the Human - correct answer ✔✔-PPE
-job rotation
-relocation
-isolation
-automation
-rest periods
-site design
Noise Exposure Test Equipment - correct answer ✔✔-Sound pressure level meter
-Octave band analyzer
-Audiometer
Sound Pressure Level Meter - correct answer ✔✔Measures gross noise level
Octave Band Analyzer - correct answer ✔✔Measures noise level in each frequency range
Audiometer - correct answer ✔✔Instrument used to determine sensitivity of a person's hearing
Vibration - correct answer ✔✔Oscillating motion of body moving about a reference position
Reasonance - correct answer ✔✔Object reacts strongly to some particular frequency
Whole Body Vibration - correct answer ✔✔-Affects the whole body as a unit
-Health effects:
-inhibition of muscular reflexes
-impaired or blurred vision
, -alterations of brain electrical activity
Segmental Vibration Health Effects - correct answer ✔✔-sore neck and shoulder muscles
-sore joints
-Raynaud's phenomenon, or white fingers, caused by restricted blood circulation in the fingers
-Neuritis and degenerative alterations of central nervous system
-Fragmentation
-Necrosis (death or decay of tissue)
-Decalcification of the carpal bones (loss of calcium)
-Muscle atrophy and tenosynovitis
Thermal Stress - correct answer ✔✔Cold and hot temperature extremes coupled with high
humidity
Homeostasis - correct answer ✔✔Balance of heat generation
Heat-Related Illnesses - correct answer ✔✔-heat edema
-fainting/weaknesses/dizziness
-headache/nausea/vomiting
-heat rash
-heat cramps
-heat exhaustion
-heat stroke
Two levels of heat stroke - correct answer ✔✔-classical heat stroke
-exertional heat stroke
answered passed
Physical Agents - correct answer ✔✔Sources of energy that may cause injury or disease
Ambient - correct answer ✔✔-All-encompassing condition associated with a given environment
-Composite of inputs from sources all around us
Noise - correct answer ✔✔-any unwanted noise
-standards for measurement: decibel (dB)
Threshold of hearing - correct answer ✔✔Range of sound that human ear can perceive or hear
Hearing response conditional on three characteristics - correct answer ✔✔-Frequency
-Duration
-Loudness
Types of Hearing Loss - correct answer ✔✔-Physiological Damage
-Temporary Threshold Shift (TTS)
-Permanent Threshold Shift
Physiological Damage - correct answer ✔✔1)Conductive Hearing Loss: Restricts transmission of
sound to cochlea or inner ear
2)Sensorineural Hearing Loss (Nerve Deafness): Affects the cochlea and is usually irreversible
,Temporary Threshold Shift - correct answer ✔✔-gradual hearing loss
-can sometimes be reversed by removal from noise source
Permanent Threshold Shift - correct answer ✔✔Hearing disability that is permanent and may
not be correctable
Signs of Hearing Loss - correct answer ✔✔-Indications of exposure to excessive noise levels
-Early warning change
Indications of Exposure to Excessive Noise Levels - correct answer ✔✔-ringing in ears (tinnitus)
-raising volume on radio or television
Early Warning Change - correct answer ✔✔-deterioration of hearing in upper frequency
-the earliest detectable sign of noise-induced hearing loss
Control Noise at the Source - correct answer ✔✔-add sound-absorbing materials
-place vibration padding under it
-redesign the operation so the machine performs differently
-isolate machine in separate room or sound-deadening enclosure
-purchase a new machine
Control Noise at the Path - correct answer ✔✔-Move worker away from source and/or erect
sound barriers between noise and worker
-As the distance from the sound source is doubled, the noise level will drop by a fixed amount
-Attenuation: Reduction of noise at one location compared with another farther from the
source
,Noise control at the Human - correct answer ✔✔-PPE
-job rotation
-relocation
-isolation
-automation
-rest periods
-site design
Noise Exposure Test Equipment - correct answer ✔✔-Sound pressure level meter
-Octave band analyzer
-Audiometer
Sound Pressure Level Meter - correct answer ✔✔Measures gross noise level
Octave Band Analyzer - correct answer ✔✔Measures noise level in each frequency range
Audiometer - correct answer ✔✔Instrument used to determine sensitivity of a person's hearing
Vibration - correct answer ✔✔Oscillating motion of body moving about a reference position
Reasonance - correct answer ✔✔Object reacts strongly to some particular frequency
Whole Body Vibration - correct answer ✔✔-Affects the whole body as a unit
-Health effects:
-inhibition of muscular reflexes
-impaired or blurred vision
, -alterations of brain electrical activity
Segmental Vibration Health Effects - correct answer ✔✔-sore neck and shoulder muscles
-sore joints
-Raynaud's phenomenon, or white fingers, caused by restricted blood circulation in the fingers
-Neuritis and degenerative alterations of central nervous system
-Fragmentation
-Necrosis (death or decay of tissue)
-Decalcification of the carpal bones (loss of calcium)
-Muscle atrophy and tenosynovitis
Thermal Stress - correct answer ✔✔Cold and hot temperature extremes coupled with high
humidity
Homeostasis - correct answer ✔✔Balance of heat generation
Heat-Related Illnesses - correct answer ✔✔-heat edema
-fainting/weaknesses/dizziness
-headache/nausea/vomiting
-heat rash
-heat cramps
-heat exhaustion
-heat stroke
Two levels of heat stroke - correct answer ✔✔-classical heat stroke
-exertional heat stroke
