OHS FINAL EXAM QUESTIONS
COMPLETE WITH VERIFIED ANSWERS
\.Physical Agents - ANSWERS✔-Sources of energy that may cause injury or disease
\.Ambient - ANSWERS✔--All-encompassing condition associated with a given
environment
-Composite of inputs from sources all around us
\.Noise - ANSWERS✔--any unwanted noise
-standards for measurement: decibel (dB)
\.Threshold of hearing - ANSWERS✔-Range of sound that human ear can perceive
or hear
\.Hearing response conditional on three characteristics - ANSWERS✔--Frequency
-Duration
-Loudness
\.Types of Hearing Loss - ANSWERS✔--Physiological Damage
-Temporary Threshold Shift (TTS)
,-Permanent Threshold Shift
\.Physiological Damage - ANSWERS✔-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 - ANSWERS✔--gradual hearing loss
-can sometimes be reversed by removal from noise source
\.Permanent Threshold Shift - ANSWERS✔-Hearing disability that is permanent
and may not be correctable
\.Signs of Hearing Loss - ANSWERS✔--Indications of exposure to excessive noise
levels
-Early warning change
\.Indications of Exposure to Excessive Noise Levels - ANSWERS✔--ringing in ears
(tinnitus)
-raising volume on radio or television
\.Early Warning Change - ANSWERS✔--deterioration of hearing in upper frequency
-the earliest detectable sign of noise-induced hearing loss
,\.Control Noise at the Source - ANSWERS✔--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 - ANSWERS✔--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 - ANSWERS✔--PPE
-job rotation
-relocation
-isolation
-automation
-rest periods
-site design
\.Noise Exposure Test Equipment - ANSWERS✔--Sound pressure level meter
-Octave band analyzer
-Audiometer
, \.Sound Pressure Level Meter - ANSWERS✔-Measures gross noise level
\.Octave Band Analyzer - ANSWERS✔-Measures noise level in each frequency
range
\.Audiometer - ANSWERS✔-Instrument used to determine sensitivity of a person's
hearing
\.Vibration - ANSWERS✔-Oscillating motion of body moving about a reference
position
\.Reasonance - ANSWERS✔-Object reacts strongly to some particular frequency
\.Whole Body Vibration - ANSWERS✔--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 - ANSWERS✔--sore neck and shoulder
muscles
-sore joints
COMPLETE WITH VERIFIED ANSWERS
\.Physical Agents - ANSWERS✔-Sources of energy that may cause injury or disease
\.Ambient - ANSWERS✔--All-encompassing condition associated with a given
environment
-Composite of inputs from sources all around us
\.Noise - ANSWERS✔--any unwanted noise
-standards for measurement: decibel (dB)
\.Threshold of hearing - ANSWERS✔-Range of sound that human ear can perceive
or hear
\.Hearing response conditional on three characteristics - ANSWERS✔--Frequency
-Duration
-Loudness
\.Types of Hearing Loss - ANSWERS✔--Physiological Damage
-Temporary Threshold Shift (TTS)
,-Permanent Threshold Shift
\.Physiological Damage - ANSWERS✔-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 - ANSWERS✔--gradual hearing loss
-can sometimes be reversed by removal from noise source
\.Permanent Threshold Shift - ANSWERS✔-Hearing disability that is permanent
and may not be correctable
\.Signs of Hearing Loss - ANSWERS✔--Indications of exposure to excessive noise
levels
-Early warning change
\.Indications of Exposure to Excessive Noise Levels - ANSWERS✔--ringing in ears
(tinnitus)
-raising volume on radio or television
\.Early Warning Change - ANSWERS✔--deterioration of hearing in upper frequency
-the earliest detectable sign of noise-induced hearing loss
,\.Control Noise at the Source - ANSWERS✔--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 - ANSWERS✔--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 - ANSWERS✔--PPE
-job rotation
-relocation
-isolation
-automation
-rest periods
-site design
\.Noise Exposure Test Equipment - ANSWERS✔--Sound pressure level meter
-Octave band analyzer
-Audiometer
, \.Sound Pressure Level Meter - ANSWERS✔-Measures gross noise level
\.Octave Band Analyzer - ANSWERS✔-Measures noise level in each frequency
range
\.Audiometer - ANSWERS✔-Instrument used to determine sensitivity of a person's
hearing
\.Vibration - ANSWERS✔-Oscillating motion of body moving about a reference
position
\.Reasonance - ANSWERS✔-Object reacts strongly to some particular frequency
\.Whole Body Vibration - ANSWERS✔--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 - ANSWERS✔--sore neck and shoulder
muscles
-sore joints
