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CAOHC EXAM QUESTIONS with 100%
Correct Answers Latest updates 2024
OSHA TREANING REQUIREMENTS - ANSWER MANDATORY PROGRAM FOR
EMPLYEES WITH NOISE EXPOSURE +85DBA/ EMPLOYER MUST ENSURE
PARTICIPATION
OSHA REQUIREMENT - ANSWER PERSONAL HEARING PROTECTORS
ATTENUATION (NRR CONSEPT AND CALCULATION)
AUDIOMETRICS TESTING PURPOSES, EFFECTS OF NOISE HEARING
IDEALLY TRAINING SHOULD - ANSWER COMPANY SPECIFIC-SHOWCASING
EMPLOYEE AND WORK AREA
RELEVANT, APPLICABLE, CURRENT, ENGANING,DIFERRENT FROM LAST YEARIS
TO MOTIVATE EMPLOYEE TO GHANGE BEHAVIORS
QUALITY TRAINING - ANSWER PROHC,PRIMARY GOAL OVIDE A GREAT
MOTIVATIONAL OPPORTUNITY TO MOTIVATE EMPLOYEE TO GHANGE
BEHAVIORS
POTENTIAL TIPOCS IN ADDITIONAL REQUIRED - ANSWER ANATOMY OF THE
EAR
EFFECT OF NOISE
CONVEY THE EXPERIENCEO F NIHL
OTOTOXINEXPOSURE AT WORK AND HOME
NIOSH 5 PRIMARY BARRIERS - ANSWER COMFORT
CONVENIENCE
COMUNICATION
COST
CULTURE OR CLIMATE
TIPS OF EFFECTIVE TRAINING - ANSWER SPEAK TO THE EDUCATIONAL LEVEL
TAILOR TO THE EMPLOYEEES JOBS
TIME THE TRAINING APPROPRIATELY(10-15MIN)
BE FLEXIBE
COUNSELING IS TRAINING - ANSWER COUNSELING IS MOTIVATIONAL
OPPORTUNITY
EXPLAIN TEST RESULTS AND PURPOSE OF HEARING TEST B SURE TO FOLLOW
PS GUIDELINES
DISCUSS NOISE EXPOSURE AT HOME AND WORK
ADDRESS BARRIES TO USING HPD
CHECK FIT AND SERVICEABILITY OF HPS
PERSONAL DOSIMETRY - ANSWER - CALCULATES NOISE EXPOSURE DIRECTLY
FROM CONTINUOS SOUNDS
- MOST ACURATE METHOD
- REPORTED AS A SINGLE NUMBER I.E 85DBA TWA
DOSIMETRY - ANSWER - MOBIL EMPLOYEE
- VAROUS SOUND LEVELS
- AREA SURVEY REVEALS NEED
USES A SOUND LEVEL METER - ANSWER TYPE I OR TYPE II
AREA NOISE LEVEL - ANSWER ALLOWS THE USERS TO ESTIMATE EXPOSURE
BY MATHEMATICALLY COMBINING
SOUND LEVEL METER - ANSWER - A SCALE AND SLOW RESPONSE
- MUST HAVE 80 - 130 DBA
- TYPE 1 IS PRECISION
CALIBRATE BEFORE EACH USE
AREA NOISE SURVEY PROCESS - ANSWER - MEASURE WHAT EMPLOYEE HEARS
- RECORDS A - WEIGHTED SOUND LEVEL
- INTERVIE A N EMPLOYEE TO DETERMINE DURATION OF EXPOSURE
ESTIMATING EXPOSURE - ANSWER - COMPUTE EXPOSURE FROM FORMULAS
AND TABLES IN CRF
- CAN USE TWA CALCULATOR
DOSIMETER - ANSWER - ACCUMULATES NOISE AND INTEGRATES OVER TIME
- REFLECTS ALL CONTRIBUTIONS TO THE EMPLOYEE NOISE EXPOSURE
PERSONAL DOSIMETERS - ANSWER - DIRECTLY COMPUTER 8 HRS TWA
- MOST DOSIMETERS PROVIDE TIME HISTORY
- SOME HAVE DUAL FUNCTIONS AS SLM TYPE II
DOSIMETER PROCESS - ANSWER - SCHEDULE EVENT DURING TYPICAL
OPERATIONS
- MONITOR FOR A FULL WORK SHIFT
- USE APPROPIATED EXCHANGE RATE 3DB OR 5DB
NOISE CONTROL - ANSWER - ALL OHC ARE CAPABLE OF IDENTIFYING NOISE
OPROBLEMS
- MOST OHC ARE ABLE TO SOLVE SIMPLE NOISE PROBLEMS
ENGINEERING CONTROL - ANSWER --MUST BE ATTEMPED FIRST IF FEASIBLE
- FACILITATES CLEAR SPEECH
- INCREASE SAFETY
- REDUCE COST AND BURDEN
NOISE CONTROL STATEGIES - ANSWER - SOURCE
- PATH, SOUND ABSORBING MATERIALS
- RECIEVER,BOOTH CONTROL ROOM, ADMINISTRATIVE CONTROLS
PERSONAL HEARING PROTECTORS FALL INTO THIS CATEGORY
OSHA ACTION LEVEL - ANSWER - 85 DBA TWA,AVERAGE UNPROTECTED
EXPOSUREOVER 8 HRS PERIOD TWA
- ANNUAL TRAINNING
- ANNUAL AUDIOMETRIC MONITORING
AVAILABILITY OF HEARING PROTECTIVE DEVICES
OSHA PERMISSABLE EXPOSURE LEVEL - ANSWER 90DBA OVER AN HRS
PERIOD
- EXANGE RATE 5 DBA
- NO UNPROTECTED EXPOSURE ABOVE 115 DBA
- MANDATORY OVER 90 DBA TWA
NOISE EXPOSURE DOSE - ANSWER - MAY BE EXPRESED IN A PERCENTAGE
DAILY DOSE
- 100% DOSE IS ALLOWABLE DAILY EXPOSURE EQUALTO THE PEL
- A 100% DOSE PER OSHA WOULD BE A TWA OF 90 DBA
AGE CORRECTION - ANSWER CALCULATIONS ARE BASEDON STATITICAL DATA
FROM A NON NOISE EXPOSURE
RECORDABILITY - ANSWER - THE EMPLOYEE AUDIGRAM REVEALS STS OF 10
DB
- THE STS DETERMINED TO BE WORK RELATED
- THE STS MUST BE RECORDER THE OSHA 300 LOG
AVERAGE HEARING LEVEL - ANSWER - HL AT 2000,3000,4000 MUST BE
GREATER THAT 25DB
- AVOIDS RECORDING INJURY ILLNESS WHEN HEARING IS NORMAL
RECORDABILITY SUMMARY - ANSWER - 21 DAYS TO NOTIFY EMPLOYEE IN
WRITING STS
- 30 DAYS TO RETEST BEFORE THE STS HAS TO BE RECORDER
AUDIOGRAM - ANSWER - SHOWS EMPLOYEE HEARING THRESHOLD
LEVELS(HTL)
- MAY BE A GRAPH WITH SYMBOLS
AUDIOGRAM SYMBOLS - ANSWER - CIRCLE FOR RIGHT EARS
- USE X FOR LEFT EARS
OUDIOMETERS TYPE - ANSWER MICROPROCESSOR-TEST IS COMPUTER
CONTROLLED
MANUAL- TESTER IS IN CONTROL,NOT AUTOMATED
MICROPROCESSOR AUDIOMETER
ADVANTAGES - ANSWER MAY PERFORM MULTIPLEHEARING TEST AT THE
SAME TIME
- REDUCE HUMAN ERRORS
- REQUIRES LTTLE SKILL
MICROPROCESSOR AUDIOMETER
DESADVANTAGES - ANSWER - MORE EXPENSIVE THAT MANUAL
- DIFFICULT FOR SOME EMPLOYEES
- DATA IMPUT MAY BE TIME CONSUMING
MANUAL ADIOMETER ADVATENGES - ANSWER - GREAT EXAMINATOR
CONTROL
- ALLOWS RETEST ON ONE OR MORE FREQUENCIES
- LEAST EXPENSIVE
- ONE ON ONE TESTING
BEST METHOD TO FOR HARD TO TEST EMPLOYEES
MANUAL ADIOMETER DISADVATENGES - ANSWER - GREAT CHANCE OF
EXAMINER ERROR
- LIMITED TO TEST ONE EMPLOYEE AT THE TIME
- MAY BE MORE TIME CONSUMING
REQUIRES MORE EXAMINER SKILLS
WHEN IS MANUAL AUDIOMETRY IS APPROPIATED - ANSWER SUBJECT HAS
DIFFICULTY UNDERTANDING INTRUCTIONS
- MOTOR SKILL CHALLENGES HAND SWITCH
- TINITTUS
- DISTRACTION LACK OF FOCUS SLEEPINESS
EARPHONES - ANSWER - NEVER REPLACE THE ERAPHONES WITHOUT HAVING
A NEW EXAHUSTIVECALIBRATION PERFORM
- MECHANICAL SHOCK ,FROM BEING DROPPED MAY ALTERATED THE
CALIBRATION OF THE EARPHONES
WHO MAY PERFOM AUDIOMETRY? - ANSWER - LINCESED
AUDIOLOGIST,OTOLARYNGOLOGIST OR PA
- TECH WHO OPERATES MICROPROCESSOR
FUNCTIONAL CALIBRATION - ANSWER REQUIRES DAILY IF AUDIO IS
CONDUCTED
- HAS TWO PARTS, LISTENING AND VISUAL
LISTENING CHECK - ANSWER THE EARPHONE IS THE MOST SENSITIVE PART
OF THE SYSTEM AND MOST LIKELY TO MALFUNCTION
- AVOID SHORTCUTS
LISTENING CHECK DIAGNOSIS - ANSWER - LOSS OF TONE, CHECK FOR BREAKS
- STATIC-CHECK FOR BROKEN FRAYED
- CHECK FOR RIPPED SHEATH-
BIOLOGICAL CALIBRATION - ANSWER - REQUIRED DAILY BEFORE
AUDIOMETRY IS CONDUCTED
-
BIO ACUSTIC SIMULATOR - ANSWER ARTIFICIAL EARS IN LIEU OF A HUMAN
SUBJECT
ACOUSTICAL CALIBRATION - ANSWER REQUIRED ANNUALLY OR IF
EQUIPMENT FAILS DAILY BIOLOGICAL CALIBRATION
EXHAUSTIVE CALIBRATION - ANSWER REQUIRED EVERY 2 YEARS OR IF
EQUIPMENT FAILS ANNUAL ELECTRO ACOUSTICAL CALIBRATION
TINNITUS - ANSWER ringing or buzzing in the ears. HEARING THRESHOLDLEVEL (HTL) - ANSWER IS DEFINE AS THE LOWEST INTENSITY LEVELTO WICH THE SUBJECT RESPOND AT LEAST 50% OF THE TIME
PROBLEMS THAT AFFECT AUDIOMETRY - ANSWER - FATIGUE
- TINNITUS
- MANUAL CORDINATION
- SUBSTANCE USE
- WAX IMPACTION
- ANXIETY ANS CLAUSTROPHOBIA TEST ALONE
FEDERAL VS STATE LOCAL - ANSWER FEDERAL REGULATION ARE MINIMUM
REQUIREMENT
- STATE AND LOCAL REGULATIONS MAY BE MORE CONSERVATIVE
HPD - ANSWER HEARING PROTECTIVE DEVICE
OPSHA REQUIREMENTS - ANSWER EMPLOYER SHALL PROVIDE A VARIETY OF
CHOICES APPROPRIATE FOR ESPECIFIC WORK ENVIROMENT
MSHA REQUIREMENTS - ANSWER - CONDITIONS FOR USE ARE THE SAME AS
OSHA
- CHOICES MUST INCLUDE 2 TYPES EACH PLUGS AND MUFFS
TYPES OF HPD - ANSWER - EARMUFFS
- EARPLUGS
- CUSTOM MODELS
- EAR CANAL CAPS
- THE BEST PROTECTION IS THE ONE THAT IS WORN AND WORN PROPERLY
HPD SELECTION - ANSWER - FIT COMFORT/EMPLOYEE PREFERENCE
- COST
- REPLACEMENT, CARE AND USE REQUIREMENT
DOUBLE HEARING PROTECTION - ANSWER - DOES NO RESUL IN DOUBLE
ATTENUATION
- ADD 5 DB TO THE HIGHEST NRR
- NIOSH RECOMMENDS AT 100 DBA
OCCLUSION EFFECT - ANSWER ABLE TO TALK TO YOU SELF AND HEARD
YOUSELF/INSIDE
EARMUFFS - ANSWER - MUFF CUSHIONS MUST FROMSEAL Against face
- FIT OVER EARS
- CARE AND HYGIENE EARMUFFS ADVANTAGES - ANSWER - ONE SIZE FIT ALL
- LONG LASTING
- MORE PREDICTABLE ATTENNUATION
- RECOMMENDED WITH UNTRAINED PERSONNEL EARMUFFS ADVANTAGES - ANSWER - BULKY
- UNCONFORTABLE IN HEAT
- EXPENSIVE
- DIFFICULT TO WEAR WITH GLASSES
EARPLUGS - ANSWER - FORMABLE
- PREMOLDED
- FOAMS
EARPLUGS ADVANTAGES - ANSWER - SMALL PORTABLE
- LESS EXPENSIVE
- ACCOMMOATE HARDHATS GLASSES ETC
EARPLUGS DISADVANTAGES - ANSWER - DIFFICULT TO MONITOR
- POTENTIAL FOR INFECCION
- REQUIRE MORE SKILL TO FIT
FORMABLE EARPLUGS - ANSWER ADVANTAGES,COMFORTABLE IF INSERTED
DISADVANTAGES-ATTENIUATION DEPENS HIGHLY ON POPRERINSERTION
- EDUCATIONAL IS CRITICAL
HEARING AIDS IN NOISE - ANSWER - HEARING AIDS SHOULD NOT BE TURNED
ON IN PRESENCE OF HIGH NOISE LEVEL
- HEARING AIDS MAY BE WORN UNDER EARMUFFS UNDER SOME CAREFULLY
SUPERVISED CONDITIONS
OHC ROLE INTHE HPD PROCESS - ANSWER - PERFORM OTOSCOPIC EXAM
- CHOOSE APPROPIATED HPD
- OFFER ORIENTATION AND TRAINING
- ENGOURAGE EMPLOYYE TO BRING HPD AUDIOMETRIC EVALUATION AN
TRAINING SESSION
OTOSCOPIC INSPECTION - ANSWER - PURPOSE CONFIRM EAR CANAL IS CLEAR
OF OVIOUS INFECTION,
- ALWAYS STOP IF IS PAINFUL AN REFER A PATIENT AS DIRECTED TO PS
UNILATERAL LOSS - ANSWER IF NEITHER EAR IS NORMAL BUT ONE IS WORSE,
LOSS CALLED ASYMMETRIC
- NOT USSUALLY CAUSE BY NOISE EXPOSURE
Conductive hearing loss - ANSWER occurs when there is a problem conducting sound waves anywhere along the route through the outer ear, tympanic membrane (eardrum), or middle ear (ossicles). Sensorineural hearing loss (SNHL) - ANSWER is a type of hearing loss, or deafness, in which the root cause lies in the inner ear (cochlear), vestibulocochlear nerve (cranial nerve VIII), or central processing centers of the brain. BONE CONDUCTING TESTING - ANSWER *INNER EAR THRESHOLDS ARE OBTAINED VIA BONE OSCILLATORPLACED ON MASTOID
- AIR BONE GAP,MORE THAT DB DIFFERENCE BEETWEEN THRESHOLD OBTAINED BY BONE CONDUCTION AND BY AIR CONDUCTION AUDIOMETRY TECHNIQUE - ANSWER - CALIBRATE DAILY
- OBTAIN AURAL
- PERFORM OTOSCOPIC EXAMINATION
- PLACE EARPHONES ON SUBJECT
- ACCURATELY RECORD AUDIOMETRY RESULTS
BEFORE TEST PLACING EARPHONES - ANSWER - REMOVE HEARING AIDS
- PUSH HAIR AIR AWAYFROM EAR CANAL
MANUAL AUDIOMETRY - ANSWER - TEST BOTH EARS AT ALL TEST
FREQUENCIES
- ALWAYS USE PULSED TONE
- PRECENT THE TONE FOE 1-2 SECONDS
(2- 3 FLASHES OF THE SIGNAL LIGHT)
AUDIOMETER OPERATION TEST - ANSWER - TEST BETTER EAR FIRTS
- SELECT FREQUENCY 1000HZ ALWAYS FIRTS
IMPORTANCE OF RECORDS - ANSWER - ACCURATE INDENTIFICATION
- ASSES EFFECTIVSNESS OF HCP
- RESPOND YO OSHA INSPECTOR REQUEST
CHARACTERISTICS OF GOOD RECORDS - ANSWER - ACCURATE
- THOROUGH
- ORGANIZED
- LEGIBLE
AUDIOMETER RECORDS - ANSWER - NAME AND JOB CLASSIFICATION'
- DATE OF AUDIOGRAM
- EXAMINERS NAME
- DATE OF LAS CALIBRATION
- EMPLOYEE MOST RECENT NOISE EXPOSURE ASSESMENT
RECORDS RETETION - ANSWER - NOISE EXPOSURE ,DOCUMENTS 2 YEARS
- AUDIOMETRIC RECORDS DURATION OF EMPLOYMENT
NIOSH RECOMM RECORDS RETETION - ANSWER - NOISE EXPOSURE 30 YEARS
- AUDIOMETRIC DURATION OF EMPLYMENT PLUS30 YEARS
AUDIOMETRIC CALIBRATION 5 YEARS
TRAINING RECORDS RETENTION - ANSWER - OSHA REQUIRED RETENTION
(NONE)
- NIOSH RECOMENT DURATION OF EMPLOYEE PLUS 1 YEAR
- DURATION OF EMPLOYMENT PLUS 30 YEARS
INDUSTRIAL HYGIENIST - ANSWER - RFESPONSABLE FOR NOISE HAZARD
EVALUATION OF WORKSITE
- WHO NEEDS TO BE INCLUDED IN HPC
- APPROPIATED ATTENUATION
CAOHC - ANSWER COUNCIL ACREDITATION IN OCCUPATIONAL HERING
CONCERVATION
CAOHC MISSION - ANSWER PROMOTE HEARING LOSS PREVENTION BY
ENHANCING THE QUUALITY OF OCCUPATIONAL HEARING LOSS PREVENTION
PRACTICES
WHAT DOES CAOHC DO - ANSWER - *TRAIN AND CERTIFYOHC AND COURSES
DIRECTIONS
- SET STANDARS AND APPROVEOHC COURSE
- PROMOTE BEST PRACTICES IN OCCUPATIONAL HEARING CONSERVATION
EFFECT OF NOISE - ANSWER - PHYSIOLOGICAL-NOISE INDUCE HEARING LOSS
- PSYCHOLOGICAL- CASN STARTLE, ANNOY DISTRUP CONCENTRARTION SLEEP
EARLY SING OF NIHL - ANSWER - DIFFICULTY UNDERSTANDING
CONVERSATIONS
- BLOCKED STUFFY SENSATIONS IN EARS
- RINNING OR BUZZING IN THE EARS(TINNITUS)
CHARACTERISTICS OF NIHL - ANSWER - USUALLY BILATERAL, ALWAYS
SENSORIAL
- AFFECT HIGH FREQUENCES NOTCH 4000HZ
- LOSS USUALLY NOT GREATER THAT 75 DB
- LOSS GREATER IN FIRST 10 - 15 YEARS
CHARACTERISTICS OF NIHL - ANSWER TEMPORALY HEARING THRESHOLD
SHIFTS
(TTS) BECOME PERMANENT THRESHOLD SHIFTS(PTS)
WITH EXPOSURES TO NOISE
30 MILLIONS - ANSWER ARE EXPOSED TO HAZARDOUS NOISEIN THE
WORKPLACE WITH ANOTHER 9 MILLIONS EXPOSED TO OTOTOXINS
OUTER EAR PROBLEMS - ANSWER - CERUM IMPACTION
- OTITIS EXTERNAL
- FOREIGN BODY
- CAUSES OF CONDUCTIVE HEARING LOSS
OSSICLES - ANSWER - ARE THE SMALLESTBONES IN THE BODY (EAR)
MIDDLE EAR PROBLEMS - ANSWER - OTITIS MEDIA
- CHOLESTEATOMA GROWTH IN MIDDLE EAR
- CAUSES CONDUCTIVE HEARING LOSS
INNER EAR PROBLEMS - ANSWER - NOISE INUCED HEARING LOSS
- OTOTOXITY-CHEMICAL INDUCED
- CAUSES PERMANENT HEARING LOSS
OTOTXINS - ANSWER - CAUSE SENSORINEURAL HEARING LOSS
- ORGANIC SOLVENTS, HAEVY METALS,ASPHYXIANTS,MONOXIDE
WORKING DEFININITION FOR HEARING CONSERVATION - ANSWER ANY
PRESSURE CHANGE IN AIRWATER OR OTHER MEDIUM WICH HUMANEAR CAN
DETECT
PROPERTIES OF SOUND WAVES - ANSWER - COMPRESSION=AREA OF POSITIVE
PRESSURE
RAREFACTION=AREA OF NEGATIVE PRESSURE
- ENTIRE CYCLE EQUALS ONE PERIOD
PROPERTY OF SOUNDS - ANSWER - FREQUENCY=CORRESPONDS TO PITCH
- INTENSITY=CORRESPONDS TO LOUDNESS
- DURATION=CORRESPONDS TO TIME
FREQUENCY - ANSWER - *NUMBER OF CYCLES PER SECOND
- UNITS OF MEASUREMENT HERTZ-OR HZ
- RANGE HUMAN HEARINGS 20-4000HZ
BEST IS FROM 500TO 4000HZ
INTENSITY - ANSWER LOUDNESS=AMPLITUDE OF SOUND WAVE
IMPULSE IMPACT NOISE - ANSWER CONSIDERATE HAZARDOUS AT 140 DBP
OR GREATER
A-WEIGHTING - ANSWER - IS USED TO FILTER A MEASURED SOUND TO
CAPTURE SOUND CONSIDERATE TO BE HAZARDOUS TO HEARING
NOISE EXPOSURE HAS TO COMPONENTS - ANSWER - LEVEL=DBA
- DURATION=TIME THAT THE PERSONIN IN THE PRESENCE OF THE NOISE
40 HRS AT 90DBA= 1SHOT FROMA RIFLEE
EXCHANGE RATE - ANSWER - REFLECTS THE RELATIONHIP BEETWEEN
ALLOWABLE EXPOSURE TIMES AND SPECIFIC NOISE LEVEL
- WHEN EXPOSSURE LEVELINCREASED 5DBA ALLOWABLE EXPOSURE TIME
HALVED
- TWA - ANSWER IS A NOISE EXPOSURE METRIC, ASSUMES A SPECIFIC EXANGE
RATE