CAOHC LATEST 2026 EXAM QUESTIONS AND SOLUTIONS
GRADED A+
✔✔DIFFERENCE BETWEEN OSHA AND NIOSH - ✔✔OSHA CREATES AND
ENFORCES REGULATIONS FOR OCCUPATIONAL SAFETY. NIOSH IS AN
EDUCATIONAL AND RESEARCH INSTITUTION, NOT A LEGAL ENFORCEMENT
AGENCY LIKE OSHA,
✔✔OSHA'S NOISE REGULATION CALLS FOR A PEL OF ___ DB, AN EXCHANGE
RATE OF __DB , AND AN ACTION LEVEL OF ___ DB. - ✔✔90-5-85
✔✔ACCORDING TO THE OSHA REGULATION, WHAT MUST EMPLOYEES AND
EMPLOYERS DO IF THE PEL IS EXCEEDED: - ✔✔-CONSIDER ENGINEERING
CONTROLS, - ADMINISTRATIVE CONTROLS
-THE USE OF HEARING PROTECTION
✔✔ACCORDING TO _________, ONE OF THE FOLLOWING MUST REVIEW
PROBLEM AUDIOGRAMS, AUDIOLOGIST, OTOLARYNGOLOGIST, OR PHYSICIAN
AKA PROFESSIONAL SUPERVISOR. - ✔✔OSHA
✔✔MINE SAFETY AND HEALTH ADMINISTRATION - ✔✔MSHA
✔✔OSHA - ✔✔OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION
✔✔OCCUPATIONAL HEARING CONSERVATIONIST - ✔✔OHC
✔✔SLM - ✔✔SOUND LEVEL METER
✔✔WHAT TELLS US HOW LOUD IT IS AT THE MOMENT OR A POINT IN TIME
NOISE MEASUREMENT - ✔✔SLM (SOUND LEVEL METER)
✔✔ANSI - ✔✔AMERICAN NATIONAL STANDARDS INSTITUTE
✔✔PEL - ✔✔PERMISSIBLE EXPOUSRE LIMIT (OSHA 90 DBA 8 HOUR TWA)
✔✔WHAT TELLS US ON AVERAGE HOW LOUD IT IS FOR AN EMPLOYEE. THIS
DEVICE IS GOOD FOR HIGHLY VARIABLE, INTERMITTENT, AND IMPULSE NOISE
- ✔✔DOSIMETER
✔✔DOSE - ✔✔NOISE EXPOSURE AS A PERCENT OF THE PEL
✔✔HALF OF THE PEL, LEVEL AT WHICH OSHA REQUIREMENTS ARE
TRIGGERED (OSHA 85 DBA 8 HOUR TWA) - ✔✔ACTION LEVEL
, ✔✔HEARING PROTECTION DEVICE - ✔✔HPD; MUFFS/PLUGS
✔✔MEASURED SOUND PRESSURE LEVEL S FROM A SLM - ✔✔DB SPL
✔✔MEASURED HEARING THRESHOLD LEVELS OR HEARING LEVELS FROM THE
AUDIOMETER - ✔✔DB HTL OR DB HL
✔✔TRUE OR FALSE: BOTH OSHA AND MSHA NOISE REGS ELECTIVELY ALLOW
ALL EMPLOYEES EXPOSED OVER THE ACTION LEVEL TO AUDIOMETRIC TESTS
- ✔✔FALSE: THEY REQUIRE ALL EMPLOYEES THAT ARE EXPOSED OVER THE
ACTION LEVEL TO MAKE AUDIOMETRIC TESTS AVAILABLE.
✔✔STS - ✔✔Standard Threshold Shift
✔✔STS OCCUR WHEN THE CURRENT AUDIOGRAM IS COMPARED TO THE
BASELINE OR REVISED BASELINE AND A CHANGE OF _____ dB AVERAGE
OCCURS AT THE FREQUIENCES OF 2000 (2), 3000 (3) AND 4000 (4) HZ. - ✔✔10
✔✔IF THE ANNUAL AUDIOGRAM SHOWS AN STS WITH RESPECT TO THE
BASELINE, ACCORDING TO OSHA, THE EMPLOYEE MUST BE NOTIFIED IN
WRITING WITHIN ___ DAYS OF THE DETERMINATION. - ✔✔21
✔✔THE HEARING PROTECTOR RATING THAT APPEARS ON THE PROTECTOR'S
PACKAGE IS THE: - ✔✔NOISE REDUCTION RATING
✔✔WHICH IS THE MOST DELICATE PART OF THE AUDIOMETRIC SYSTEM? -
✔✔HEADPHONES
✔✔WHAT ARE THE ADVANTAGES AND DISADVANTAGE OF MANUAL TESTING? -
✔✔LEAST EXPENSIVE, CONTROLLED BY EXAMINER AND OPERATOR ERROR
✔✔OSHA REQUIRES EMPLOYERS TO WARN EMPLOYEES TO AVOID HIGH
LEVELS OF NONOCCUPATIONAL NOISE FOR AT LEAST ___ HOURS PRIOR TO
THE BASELINE AND RETEST AUDIOGRAMS. - ✔✔14
✔✔THE DURATION OF EACH TONE PRESENTATION SHOULD BE
________________________. - ✔✔1-2 SECONDS
✔✔TRUE OR FALSE: AN OHC WHO HAS A MICROPROCESSOR AUDIOMETER
DOES NOT NEED TO KNOW HOW TO PERFORM A MANUAL TEST. - ✔✔FALSE;
AN OHC WHO HAS A MICROPROCESSOR AUDIOMETER NEEDS TO KNOW HOW
GRADED A+
✔✔DIFFERENCE BETWEEN OSHA AND NIOSH - ✔✔OSHA CREATES AND
ENFORCES REGULATIONS FOR OCCUPATIONAL SAFETY. NIOSH IS AN
EDUCATIONAL AND RESEARCH INSTITUTION, NOT A LEGAL ENFORCEMENT
AGENCY LIKE OSHA,
✔✔OSHA'S NOISE REGULATION CALLS FOR A PEL OF ___ DB, AN EXCHANGE
RATE OF __DB , AND AN ACTION LEVEL OF ___ DB. - ✔✔90-5-85
✔✔ACCORDING TO THE OSHA REGULATION, WHAT MUST EMPLOYEES AND
EMPLOYERS DO IF THE PEL IS EXCEEDED: - ✔✔-CONSIDER ENGINEERING
CONTROLS, - ADMINISTRATIVE CONTROLS
-THE USE OF HEARING PROTECTION
✔✔ACCORDING TO _________, ONE OF THE FOLLOWING MUST REVIEW
PROBLEM AUDIOGRAMS, AUDIOLOGIST, OTOLARYNGOLOGIST, OR PHYSICIAN
AKA PROFESSIONAL SUPERVISOR. - ✔✔OSHA
✔✔MINE SAFETY AND HEALTH ADMINISTRATION - ✔✔MSHA
✔✔OSHA - ✔✔OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION
✔✔OCCUPATIONAL HEARING CONSERVATIONIST - ✔✔OHC
✔✔SLM - ✔✔SOUND LEVEL METER
✔✔WHAT TELLS US HOW LOUD IT IS AT THE MOMENT OR A POINT IN TIME
NOISE MEASUREMENT - ✔✔SLM (SOUND LEVEL METER)
✔✔ANSI - ✔✔AMERICAN NATIONAL STANDARDS INSTITUTE
✔✔PEL - ✔✔PERMISSIBLE EXPOUSRE LIMIT (OSHA 90 DBA 8 HOUR TWA)
✔✔WHAT TELLS US ON AVERAGE HOW LOUD IT IS FOR AN EMPLOYEE. THIS
DEVICE IS GOOD FOR HIGHLY VARIABLE, INTERMITTENT, AND IMPULSE NOISE
- ✔✔DOSIMETER
✔✔DOSE - ✔✔NOISE EXPOSURE AS A PERCENT OF THE PEL
✔✔HALF OF THE PEL, LEVEL AT WHICH OSHA REQUIREMENTS ARE
TRIGGERED (OSHA 85 DBA 8 HOUR TWA) - ✔✔ACTION LEVEL
, ✔✔HEARING PROTECTION DEVICE - ✔✔HPD; MUFFS/PLUGS
✔✔MEASURED SOUND PRESSURE LEVEL S FROM A SLM - ✔✔DB SPL
✔✔MEASURED HEARING THRESHOLD LEVELS OR HEARING LEVELS FROM THE
AUDIOMETER - ✔✔DB HTL OR DB HL
✔✔TRUE OR FALSE: BOTH OSHA AND MSHA NOISE REGS ELECTIVELY ALLOW
ALL EMPLOYEES EXPOSED OVER THE ACTION LEVEL TO AUDIOMETRIC TESTS
- ✔✔FALSE: THEY REQUIRE ALL EMPLOYEES THAT ARE EXPOSED OVER THE
ACTION LEVEL TO MAKE AUDIOMETRIC TESTS AVAILABLE.
✔✔STS - ✔✔Standard Threshold Shift
✔✔STS OCCUR WHEN THE CURRENT AUDIOGRAM IS COMPARED TO THE
BASELINE OR REVISED BASELINE AND A CHANGE OF _____ dB AVERAGE
OCCURS AT THE FREQUIENCES OF 2000 (2), 3000 (3) AND 4000 (4) HZ. - ✔✔10
✔✔IF THE ANNUAL AUDIOGRAM SHOWS AN STS WITH RESPECT TO THE
BASELINE, ACCORDING TO OSHA, THE EMPLOYEE MUST BE NOTIFIED IN
WRITING WITHIN ___ DAYS OF THE DETERMINATION. - ✔✔21
✔✔THE HEARING PROTECTOR RATING THAT APPEARS ON THE PROTECTOR'S
PACKAGE IS THE: - ✔✔NOISE REDUCTION RATING
✔✔WHICH IS THE MOST DELICATE PART OF THE AUDIOMETRIC SYSTEM? -
✔✔HEADPHONES
✔✔WHAT ARE THE ADVANTAGES AND DISADVANTAGE OF MANUAL TESTING? -
✔✔LEAST EXPENSIVE, CONTROLLED BY EXAMINER AND OPERATOR ERROR
✔✔OSHA REQUIRES EMPLOYERS TO WARN EMPLOYEES TO AVOID HIGH
LEVELS OF NONOCCUPATIONAL NOISE FOR AT LEAST ___ HOURS PRIOR TO
THE BASELINE AND RETEST AUDIOGRAMS. - ✔✔14
✔✔THE DURATION OF EACH TONE PRESENTATION SHOULD BE
________________________. - ✔✔1-2 SECONDS
✔✔TRUE OR FALSE: AN OHC WHO HAS A MICROPROCESSOR AUDIOMETER
DOES NOT NEED TO KNOW HOW TO PERFORM A MANUAL TEST. - ✔✔FALSE;
AN OHC WHO HAS A MICROPROCESSOR AUDIOMETER NEEDS TO KNOW HOW
