COHN-S COMPREHENSIVE 2026 EXAM QUESTIONS AND
ANSWERS GRADED A+
✔✔NIOSH (National Institute for Occupational Safety and Health) - ✔✔tests and
certifies respiratory protective devices and air sampling detector tubes, recommends
occupational exposure limits for various substances, and assists OSHA inoccupational
safety and health investigations and research.Part of the department of health and
human services under the CDC
✔✔ACGIH: American conference of governmental industrial hygiene - ✔✔Provides
guidelines for protection against toxic chemicals. They establish threshold limit value
TLV
✔✔And industrial hygiene, does is best described as? - ✔✔The single factor that
determines the degree of harmfulness of a substance
✔✔presbycusis - ✔✔age related hearing loss
✔✔Conductive hearing loss - ✔✔hearing impairment caused by interference with sound
or vibratory energy in the external canal, middle ear, or ossicles.Middle ear
✔✔Permissible exposure limit for hearing - ✔✔8 hours at 90 dB (A)
✔✔For each increase of 5 dB, allowable exposure time decreases by? - ✔✔50%
8- hour exposure @ 90dB
4-hour exposure @ 95dB
2-hour exposure @ 100dB
1-hour exposure @105dB
30 minutes @110dB
✔✔Hearing conservation program HCP, required if the employees noise exposure
reaches the action level: - ✔✔8 hour TWA > or equal to 85 dB (A)
✔✔Baseline testing - ✔✔Within six months if in-house after 14 hours exposure free or
within one year if using van testing
✔✔Only two ways you can change a baseline hearing - ✔✔One if the baseline
improves and two if they have STS that becomes the baseline
✔✔A Standard Threshold Shift (STS) is defined in OSHA's Hearing Conservation
amendment as an average shift (or loss) in either ear of _____ or more at the 2,000;
3,000; and 4,000 frequencies. - ✔✔10 dB
,✔✔Audiometer Calibration - ✔✔Biological check every day before testing
Acoustical check annually
Exhaustive calibration every two years
✔✔sensory neural hearing loss - ✔✔hearing loss caused by damage to the cochlea's
receptor cells or to the auditory nerve. Inner ear
✔✔A weber test that lateralized is to the good year would be positive for a? -
✔✔Sensorineural loss
✔✔A Rinne test resulted in bone conduction being heard longer than air conduction, the
loss would be a? - ✔✔Conductive hearing loss
✔✔How many phases are required to be included in the hearing conservation program?
- ✔✔5
✔✔What is the length of time before the OHN must be recertified in hearing
conservation? - ✔✔5 years
✔✔Wagner Act (1935) - ✔✔(National Labor Relations Act) gives workers the right to
organize a union and bargain with management
✔✔Five step grievance arbitration procedure - ✔✔Grievant, union steward, chief
steward, local union president, last step arbitration
✔✔OSHA (Occupational Safety and Health Administration) - ✔✔Establish and modify
mandatory standards
Falls under the department of labor
✔✔NIOSH (National Institute for Occupational Safety and Health) - ✔✔Federal agency
that is nonregulatory and provides national and worldwide leadership to prevent work-
related illnesses and injuries.
Developed criteria for the national standards
Does not cite or give penalties
✔✔DOT exam blood pressure qualification - ✔✔Driver qualified if blood pressure is less
than or equal to 140/90
✔✔DOT vision requirement - ✔✔At least 20/40 acuity in each eye with or without
correction
✔✔DOT hearing requirement - ✔✔Must first perceive force whispered voice greater
than or equal to 5 feet, with or without hearing aid or average hearing loss and better
ear less than or greater than 40 dB
, ✔✔DOT qualifications and diabetes - ✔✔Must have no establish medical history or
clinical diagnosis of diabetes mellitus currently requiring insulin for control, if condition
controlled by use of oral medication and diet, then individual may be qualified under the
present rule.
✔✔GINA - ✔✔prohibits discrimination based on genetic information
✔✔Limitations are medical exams before making job offer: - ✔✔Cannot ask or require
applicant to take medical examination
Cannot inquire about disability or nature of severity of disability
May ask questions about ability to perform specific job functions
May ask person to describe or demonstrate how to perform essential function
Make condition job offer on satisfactory result of post offer medical examination
✔✔Blood borne pathogen training - ✔✔On initial assignment and each year
✔✔Exposure incident - ✔✔specific eye, mouth, other mucous membrane, non-intact
skin, or parenteral contact with blood or other potentially infectious materials that results
from the performance of an employee's duties.
✔✔Hepatitis B vaccine should be given or offered - ✔✔Within 10 working days of
assignment
✔✔Healthcare professionals written opinion should be provided within - ✔✔15 days
✔✔Hazard Communication Standard November 25, 1983 - ✔✔the "right-to-know"
standard that requires all manufacturing firms to inventory toxic agents, label them,
develop information sheets, and educate employees about these agents
✔✔Globally Harmonized System of Classification and Labeling of Chemicals (GHS) -
✔✔An effort by the United Nations to classify and label hazardous materials that
provides three key pieces of information: (1) a symbol; (2) a signal word; and (3) a
hazard statement
✔✔Five employer obligations - ✔✔Identification and listing of hazardous chemicals
Written hazard communication program
Labels and other forms of warnings
Safety data sheets
Employee education
✔✔Safety data sheets are updated within: - ✔✔Three months of new hazard finding
ANSWERS GRADED A+
✔✔NIOSH (National Institute for Occupational Safety and Health) - ✔✔tests and
certifies respiratory protective devices and air sampling detector tubes, recommends
occupational exposure limits for various substances, and assists OSHA inoccupational
safety and health investigations and research.Part of the department of health and
human services under the CDC
✔✔ACGIH: American conference of governmental industrial hygiene - ✔✔Provides
guidelines for protection against toxic chemicals. They establish threshold limit value
TLV
✔✔And industrial hygiene, does is best described as? - ✔✔The single factor that
determines the degree of harmfulness of a substance
✔✔presbycusis - ✔✔age related hearing loss
✔✔Conductive hearing loss - ✔✔hearing impairment caused by interference with sound
or vibratory energy in the external canal, middle ear, or ossicles.Middle ear
✔✔Permissible exposure limit for hearing - ✔✔8 hours at 90 dB (A)
✔✔For each increase of 5 dB, allowable exposure time decreases by? - ✔✔50%
8- hour exposure @ 90dB
4-hour exposure @ 95dB
2-hour exposure @ 100dB
1-hour exposure @105dB
30 minutes @110dB
✔✔Hearing conservation program HCP, required if the employees noise exposure
reaches the action level: - ✔✔8 hour TWA > or equal to 85 dB (A)
✔✔Baseline testing - ✔✔Within six months if in-house after 14 hours exposure free or
within one year if using van testing
✔✔Only two ways you can change a baseline hearing - ✔✔One if the baseline
improves and two if they have STS that becomes the baseline
✔✔A Standard Threshold Shift (STS) is defined in OSHA's Hearing Conservation
amendment as an average shift (or loss) in either ear of _____ or more at the 2,000;
3,000; and 4,000 frequencies. - ✔✔10 dB
,✔✔Audiometer Calibration - ✔✔Biological check every day before testing
Acoustical check annually
Exhaustive calibration every two years
✔✔sensory neural hearing loss - ✔✔hearing loss caused by damage to the cochlea's
receptor cells or to the auditory nerve. Inner ear
✔✔A weber test that lateralized is to the good year would be positive for a? -
✔✔Sensorineural loss
✔✔A Rinne test resulted in bone conduction being heard longer than air conduction, the
loss would be a? - ✔✔Conductive hearing loss
✔✔How many phases are required to be included in the hearing conservation program?
- ✔✔5
✔✔What is the length of time before the OHN must be recertified in hearing
conservation? - ✔✔5 years
✔✔Wagner Act (1935) - ✔✔(National Labor Relations Act) gives workers the right to
organize a union and bargain with management
✔✔Five step grievance arbitration procedure - ✔✔Grievant, union steward, chief
steward, local union president, last step arbitration
✔✔OSHA (Occupational Safety and Health Administration) - ✔✔Establish and modify
mandatory standards
Falls under the department of labor
✔✔NIOSH (National Institute for Occupational Safety and Health) - ✔✔Federal agency
that is nonregulatory and provides national and worldwide leadership to prevent work-
related illnesses and injuries.
Developed criteria for the national standards
Does not cite or give penalties
✔✔DOT exam blood pressure qualification - ✔✔Driver qualified if blood pressure is less
than or equal to 140/90
✔✔DOT vision requirement - ✔✔At least 20/40 acuity in each eye with or without
correction
✔✔DOT hearing requirement - ✔✔Must first perceive force whispered voice greater
than or equal to 5 feet, with or without hearing aid or average hearing loss and better
ear less than or greater than 40 dB
, ✔✔DOT qualifications and diabetes - ✔✔Must have no establish medical history or
clinical diagnosis of diabetes mellitus currently requiring insulin for control, if condition
controlled by use of oral medication and diet, then individual may be qualified under the
present rule.
✔✔GINA - ✔✔prohibits discrimination based on genetic information
✔✔Limitations are medical exams before making job offer: - ✔✔Cannot ask or require
applicant to take medical examination
Cannot inquire about disability or nature of severity of disability
May ask questions about ability to perform specific job functions
May ask person to describe or demonstrate how to perform essential function
Make condition job offer on satisfactory result of post offer medical examination
✔✔Blood borne pathogen training - ✔✔On initial assignment and each year
✔✔Exposure incident - ✔✔specific eye, mouth, other mucous membrane, non-intact
skin, or parenteral contact with blood or other potentially infectious materials that results
from the performance of an employee's duties.
✔✔Hepatitis B vaccine should be given or offered - ✔✔Within 10 working days of
assignment
✔✔Healthcare professionals written opinion should be provided within - ✔✔15 days
✔✔Hazard Communication Standard November 25, 1983 - ✔✔the "right-to-know"
standard that requires all manufacturing firms to inventory toxic agents, label them,
develop information sheets, and educate employees about these agents
✔✔Globally Harmonized System of Classification and Labeling of Chemicals (GHS) -
✔✔An effort by the United Nations to classify and label hazardous materials that
provides three key pieces of information: (1) a symbol; (2) a signal word; and (3) a
hazard statement
✔✔Five employer obligations - ✔✔Identification and listing of hazardous chemicals
Written hazard communication program
Labels and other forms of warnings
Safety data sheets
Employee education
✔✔Safety data sheets are updated within: - ✔✔Three months of new hazard finding
