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CAQ-OccMed practice questions

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Question 1Occupational Medicine

A worker in a battery plant has a blood lead level of 45 µg/dL confirmed on a second sample. Under typical occupational lead standards, which action is most appropriate?

  1. Restrict the worker to respirator use only while continuing current duties
  2. Report the result only if symptoms of lead toxicity develop
  3. Remove the worker from lead exposure until the level falls below the removal threshold Correct answer.
  4. Continue routine monitoring and retest in six months

Explanation

Confirmed blood lead levels at or above the medical removal threshold (commonly 40–50 µg/dL depending on jurisdiction) require removing the worker from further exposure. Removal protects against progression to clinical toxicity and is a core element of a medical surveillance program. Respirators alone do not substitute for removal when the biologic threshold is exceeded.

Question 2Occupational Medicine

Which spirometric pattern is most characteristic of occupational asthma?

  1. Isolated reduction in diffusing capacity with normal spirometry
  2. Reduced total lung capacity with a normal FEV1/FVC ratio
  3. Increased FVC with a normal FEV1/FVC ratio
  4. Reduced FEV1/FVC ratio with significant bronchodilator reversibility Correct answer.

Explanation

Occupational asthma produces variable airflow obstruction, shown by a reduced FEV1/FVC ratio and improvement after a bronchodilator or across work shifts. Serial peak flow measurements at and away from work can demonstrate work-related variability. Restrictive and gas-exchange patterns point to other diagnoses.

Question 3Occupational Medicine

A hospital nurse develops a positive interferon-gamma release assay after exposure to a patient with active pulmonary tuberculosis. She has no symptoms and a normal chest radiograph. What is the most appropriate interpretation?

  1. Latent tuberculosis infection requiring evaluation for preventive treatment Correct answer.
  2. A false-positive result that can be disregarded in health care workers
  3. Evidence of prior BCG vaccination that needs no further action
  4. Active tuberculosis requiring immediate isolation and multidrug therapy

Explanation

A positive IGRA with no symptoms and a normal chest radiograph indicates latent tuberculosis infection. Latent infection is not contagious but carries a lifetime risk of reactivation, so preventive therapy should be considered. IGRA results are not affected by prior BCG vaccination.

Question 4Occupational Medicine

Which exposure is most strongly associated with the development of malignant mesothelioma?

  1. Chronic exposure to ionizing radiation
  2. Inhalation of asbestos fibers Correct answer.
  3. Exposure to organic solvents
  4. Inhalation of crystalline silica dust

Explanation

Asbestos exposure, particularly amphibole fibers, is the principal established cause of malignant mesothelioma of the pleura and peritoneum. The latency period is typically decades after first exposure. Silica, solvents, and radiation are linked to other occupational diseases.

Question 5Occupational Medicine

A worker presents with numbness and tingling of the hands that worsens at night and is relieved by shaking the hands. Phalen and Tinel tests are positive. Which diagnosis is most likely?

  1. Vibration-induced white finger
  2. Carpal tunnel syndrome Correct answer.
  3. Ulnar neuropathy at the elbow
  4. Cervical radiculopathy

Explanation

Nocturnal paresthesias relieved by shaking the hands, together with positive Phalen and Tinel signs, are classic for carpal tunnel syndrome from median nerve compression. Repetitive forceful hand work and vibration are common occupational contributors. Electrodiagnostic testing can confirm the diagnosis.

Question 6Occupational Medicine

A noise-exposed worker has a 25 dB shift in hearing threshold at 4000 Hz compared with baseline. Which statement best describes this finding?

  1. It proves permanent disability from acoustic trauma
  2. It is normal variability and requires no action
  3. It is a standard threshold shift that warrants notification and hearing conservation follow-up Correct answer.
  4. It indicates conductive hearing loss from cerumen impaction

Explanation

A standard threshold shift is defined as an average change of 10 dB or more at 2000, 3000, and 4000 Hz in either ear. Shifts at 4000 Hz are characteristic of early noise-induced hearing loss. The finding triggers notification, re-evaluation, and reinforced hearing conservation measures rather than an assumption of permanence.

Question 7Occupational Medicine

Which personal protective equipment ensemble is appropriate for handling a patient with suspected viral hemorrhagic fever in a health care setting?

  1. Standard uniform with hand hygiene before and after contact
  2. Fluid-resistant gown, gloves, face shield, and respiratory protection with trained donning and doffing Correct answer.
  3. Cloth gown and reusable cotton gloves
  4. Surgical mask and examination gloves only

Explanation

Suspected viral hemorrhagic fever requires full barrier precautions with fluid-resistant clothing, eye and face protection, and respiratory protection, plus supervised donning and doffing. These measures prevent mucocutaneous and droplet exposure during high-risk procedures. Training and a trained observer reduce self-contamination during removal.

Question 8Occupational Medicine

A worker with known sensitization to natural rubber latex reports itching and urticaria when wearing powdered latex gloves. Which control measure is most effective?

  1. Advise the worker to take an antihistamine before each shift
  2. Eliminate powdered latex gloves and substitute non-latex alternatives Correct answer.
  3. Provide the worker with cotton liners under the same gloves
  4. Rotate the worker to a different department

Explanation

Eliminating powdered latex gloves removes both the latex allergen and the cornstarch that carries it airborne, protecting the sensitized worker and others. Substitution is the most effective step in the hierarchy of controls. Personal measures such as medication do not prevent ongoing exposure.

Question 9Occupational Medicine

Which clinical finding is most consistent with organophosphate poisoning in an agricultural worker?

  1. Cyanosis with cherry-red skin
  2. Tremor with preserved pupils and no secretions
  3. Bradycardia, miosis, salivation, and bronchorrhea Correct answer.
  4. Tachycardia, mydriasis, and dry skin

Explanation

Organophosphates inhibit acetylcholinesterase, producing a cholinergic syndrome with bradycardia, miosis, salivation, lacrimation, urination, diarrhea, and bronchorrhea. Atropine and pralidoxime are used in treatment. Immediate decontamination and removal from exposure are essential.

Question 10Occupational Medicine

A construction worker is found unresponsive in a confined space. Which action should rescuers take first?

  1. Ventilate the space and wait for the atmosphere to clear before entering
  2. Activate the emergency response and perform a non-entry rescue if feasible Correct answer.
  3. Enter immediately to remove the worker
  4. Administer oxygen by mask at the entry point

Explanation

Confined space rescue requires activating trained emergency responders and attempting non-entry retrieval before anyone enters. Most fatalities in confined spaces involve would-be rescuers who enter without atmospheric testing or respiratory protection. Entry should occur only with appropriate equipment and backup.

Question 11Occupational Medicine

Which statement about the occupational history is most accurate?

  1. It is sufficient to record the worker's current job title
  2. It should focus only on exposures that the worker believes caused symptoms
  3. It should document current and past jobs, specific tasks, exposures, and duration of each employment Correct answer.
  4. It can be omitted when the presenting complaint is clearly non-occupational

Explanation

A complete occupational history records all jobs, tasks performed, specific agents, duration, and protective measures, because latency and cumulative exposure matter. Job titles alone are poor proxies for exposure. A detailed history often reveals occupational contributions to common conditions.

Question 12Occupational Medicine

A worker exposed to hand-arm vibration develops episodic blanching of the fingers triggered by cold. Which term best describes this condition?

  1. Raynaud phenomenon secondary to scleroderma
  2. Peripheral neuropathy from lead exposure
  3. Carpal tunnel syndrome
  4. Hand-arm vibration syndrome with vascular component Correct answer.

Explanation

Episodic finger blanching provoked by cold in a vibration-exposed worker is the vascular component of hand-arm vibration syndrome, historically called vibration white finger. It results from prolonged use of powered hand tools. Reducing vibration exposure and keeping the hands warm are key management steps.

Question 13Occupational Medicine

Which laboratory test is most useful for monitoring workers exposed to benzene?

  1. Urinary calcium
  2. Liver transaminases
  3. Serum creatinine
  4. Complete blood count with attention to white cells and platelets Correct answer.

Explanation

Benzene is a bone marrow toxin associated with cytopenias and leukemia, so periodic complete blood counts are the standard surveillance test. Declining white cell or platelet counts prompt further evaluation and exposure reduction. Exposure biomarkers such as urinary S-phenylmercapturic acid can supplement but do not replace the CBC.

Question 14Occupational Medicine

A worker with a history of asthma is assigned to a job involving isocyanate exposure. Which preplacement approach is most appropriate?

  1. Assess asthma history and lung function and counsel on the risk of sensitization before assignment Correct answer.
  2. Clear the worker without further assessment because asthma is not work-related
  3. Exclude all workers with any history of atopy from the job
  4. Require the worker to sign a waiver of medical surveillance

Explanation

Isocyanates are potent respiratory sensitizers, and pre-existing asthma increases the risk of worsened disease. Preplacement evaluation with lung function and counseling supports informed placement and early detection. Blanket exclusion of atopic workers is not evidence-based and may be discriminatory.

Question 15Occupational Medicine

A worker reports low back pain after repeated manual lifting. Which ergonomic intervention is most likely to reduce future risk?

  1. Advise the worker to lift more quickly to reduce time under load
  2. Provide a back belt and continue the same lifting routine
  3. Redesign the task to reduce lifting force and awkward postures Correct answer.
  4. Recommend bed rest until the pain resolves

Explanation

Ergonomic redesign addresses the root cause by reducing force, repetition, and awkward postures, consistent with the hierarchy of controls. Back belts have limited evidence and do not substitute for task redesign. Early return to modified activity is preferred over prolonged bed rest.

Question 16Occupational Medicine

Which statement about the hierarchy of controls is correct?

  1. The hierarchy applies only to chemical hazards
  2. PPE is the preferred control because it protects every worker equally
  3. Administrative controls are always more effective than engineering controls
  4. Elimination and substitution are preferred over engineering controls, which are preferred over PPE Correct answer.

Explanation

The hierarchy ranks controls from most to least effective: elimination, substitution, engineering controls, administrative controls, and PPE. Controls higher in the hierarchy protect all workers and depend less on individual behavior. PPE is the last line of defense because it requires correct use and maintenance.

Question 17Occupational Medicine

A worker has a needlestick injury from a source patient known to be hepatitis B surface antigen positive. The worker's hepatitis B vaccination status is unknown. What is the most appropriate immediate step?

  1. Disinfect the wound with bleach
  2. Apply a tight tourniquet above the injury site
  3. Wait for symptoms before seeking care
  4. Wash the site, report the exposure, and evaluate for postexposure prophylaxis including hepatitis B immune globulin and vaccine as indicated Correct answer.

Explanation

After a needlestick, the site should be washed with soap and water and the exposure reported promptly for evaluation. For a hepatitis B surface antigen positive source, unvaccinated or unknown-status workers may need hepatitis B immune globulin and vaccination. Timing matters, so evaluation should not be delayed.

Question 18Occupational Medicine

Which finding on a chest radiograph is most characteristic of advanced silicosis?

  1. Unilateral pleural effusion with mediastinal shift
  2. Small rounded opacities with upper lobe predominance and possible progressive massive fibrosis Correct answer.
  3. Lower lobe reticular opacities with honeycombing
  4. Bilateral hilar lymphadenopathy with erythema nodosum

Explanation

Silicosis produces small rounded opacities, typically in the upper lobes, and may progress to progressive massive fibrosis with large conglomerate masses. Eggshell calcification of hilar nodes can also occur. These features reflect inhalation of respirable crystalline silica.

Question 19Occupational Medicine

A worker in a hot environment collapses with confusion, a core temperature of 41°C, and hot dry skin. Which action is the priority?

  1. Give oral fluids and observe for 30 minutes
  2. Begin rapid active cooling while arranging emergency transport Correct answer.
  3. Apply warm blankets to prevent shivering
  4. Place the worker in a shaded area and monitor vital signs only

Explanation

Heat stroke is a medical emergency defined by hyperthermia and central nervous system dysfunction, and rapid cooling is the priority to limit organ damage. Cooling should begin immediately while transport is arranged. Oral fluids are unsafe in a confused patient and do not treat hyperthermia.

Question 20Occupational Medicine

Which agent is associated with the development of angiosarcoma of the liver in exposed workers?

  1. Carbon disulfide
  2. Vinyl chloride monomer Correct answer.
  3. Trichloroethylene
  4. Toluene

Explanation

Vinyl chloride monomer, used in polyvinyl chloride production, is a known cause of hepatic angiosarcoma and is also linked to Raynaud-like vascular changes and acroosteolysis. Latency is often decades. Carbon disulfide, trichloroethylene, and toluene cause other toxic effects.

Question 21Occupational Medicine

A worker with chronic obstructive pulmonary disease wants to continue working in a dusty environment. Which approach best reflects sound occupational medicine practice?

  1. Assess exposure, recommend engineering and administrative controls, and support continued work with appropriate restrictions Correct answer.
  2. Certify the worker as fit without any restrictions
  3. Advise immediate permanent retirement from all work
  4. Tell the worker that COPD cannot be affected by workplace dust

Explanation

The goal is to keep workers employed safely by reducing exposure through engineering and administrative controls and tailored restrictions. Blanket retirement is unnecessarily restrictive and may not be in the worker's interest. Ongoing dust exposure can accelerate decline in lung function.

Question 22Occupational Medicine

Which statement about occupational dermatitis is most accurate?

  1. Irritant contact dermatitis is more common than allergic contact dermatitis and results from direct skin damage Correct answer.
  2. Occupational dermatitis affects only the hands
  3. Allergic contact dermatitis requires no prior sensitization
  4. Patch testing is contraindicated in occupational dermatitis

Explanation

Irritant contact dermatitis is the most common occupational skin disease and results from direct chemical or physical damage to the skin barrier. Allergic contact dermatitis is a type IV hypersensitivity reaction that requires prior sensitization. Patch testing is the standard diagnostic tool for the allergic form.

Question 23Occupational Medicine

A laboratory worker is exposed to a volatile solvent and develops headache, dizziness, and confusion. Which exposure control failure is most likely to explain an acute inhalation event?

  1. Availability of a safety data sheet
  2. Inadequate local exhaust ventilation in the work area Correct answer.
  3. Use of nitrile gloves during handling
  4. Routine medical surveillance scheduling

Explanation

Acute inhalation of solvent vapor most often results from inadequate local exhaust ventilation or work practices that release vapor into the breathing zone. Local exhaust captures contaminants at the source and is an engineering control. Gloves, safety data sheets, and surveillance are important but do not prevent airborne release.

Question 24Occupational Medicine

Which biologic monitoring approach is appropriate for a worker exposed to inorganic mercury vapor?

  1. Blood glucose monitoring
  2. Urine mercury measurement, ideally collected at the end of a work week Correct answer.
  3. Spirometry before and after each shift
  4. Serum amylase measurement

Explanation

Urinary mercury is the standard biomarker for inorganic and elemental mercury exposure and is best collected at the end of the work week to reflect cumulative exposure. Blood mercury can be useful for acute exposure. Spirometry and metabolic tests are not appropriate monitoring tools for mercury.

Question 25Occupational Medicine

A worker requests accommodation for a chronic musculoskeletal condition. Which approach best aligns with occupational medicine practice?

  1. Evaluate functional capacity and consider reasonable modifications to tasks or schedule Correct answer.
  2. Recommend permanent leave without exploring alternatives
  3. Deny accommodation because the condition is not work-related
  4. Require the worker to disclose the full medical record to all coworkers

Explanation

Occupational medicine supports matching worker functional capacity to job demands through reasonable modification, regardless of whether the condition is work-related. Accommodation focuses on abilities and job tasks rather than the diagnosis alone. Confidentiality should be maintained and unnecessary disclosure avoided.

Question 26Occupational Medicine

Under the General Duty Clause of the OSH Act, an employer is required to furnish each employee a workplace free from recognized hazards likely to cause death or serious physical harm. Which condition must generally be met for the clause to apply when no specific standard exists?

  1. The workforce must exceed fifty employees at the site
  2. The employer must first be cited under a specific substance standard
  3. The hazard must have already caused at least one recorded injury
  4. A feasible means of abatement exists and the hazard is recognized by the employer or industry Correct answer.

Explanation

The General Duty Clause applies when a hazard is recognized, is likely to cause death or serious physical harm, and a feasible method of abatement is available. Without a feasible abatement, a citation generally cannot be sustained. The clause is used precisely when no specific standard covers the hazard.

Question 27Occupational Medicine

A plant physician is asked to design a medical surveillance program for workers exposed to respirable crystalline silica. Which element is most consistent with current occupational health practice?

  1. Biannual audiometry alone with no respiratory components
  2. Baseline and periodic chest imaging with spirometry and tuberculosis screening where indicated Correct answer.
  3. Annual serum creatinine with urinary protein electrophoresis
  4. Quarterly complete blood counts with reticulocyte index

Explanation

Silica surveillance centers on respiratory endpoints: chest imaging, spirometry, and evaluation for tuberculosis in appropriate settings. Silica exposure raises risk of silicosis, COPD, and mycobacterial disease. Hematologic and renal panels are not the core surveillance elements for crystalline silica.

Question 28Occupational Medicine

A worker is exposed to a solvent with a dermal absorption notation in the exposure limit listing. Which conclusion is most appropriate when interpreting an air sampling result below the airborne limit?

  1. Air monitoring is unnecessary whenever a dermal notation is present
  2. The dermal notation means the substance cannot cause systemic effects
  3. Airborne compliance alone may not protect the worker because skin uptake can add substantially to total dose Correct answer.
  4. The airborne limit is automatically halved when skin absorption is possible

Explanation

A skin notation signals that dermal absorption can contribute meaningfully to systemic dose, so airborne measurements may underestimate total exposure. Biological monitoring is often used to assess combined uptake. The notation does not alter the numerical airborne limit automatically.

Question 29Occupational Medicine

Which statement best describes the purpose of a workplace hazard assessment under a hazard communication program?

  1. To satisfy recordkeeping for injury logs only
  2. To replace engineering controls with administrative procedures
  3. To certify that all chemicals on site are nonhazardous
  4. To identify chemical hazards and ensure labels, safety data sheets, and training reach exposed workers Correct answer.

Explanation

Hazard communication requires employers to inventory hazardous chemicals and ensure containers are labeled, safety data sheets are available, and workers are trained. The assessment supports informed protection, not elimination of controls. It does not certify chemicals as safe.

Question 30Occupational Medicine

A worker in a battery recycling facility has blood lead level of 35 micrograms per deciliter. Which action is most consistent with occupational management?

  1. Repeat the test only after twelve months
  2. Restrict the worker from all employment permanently
  3. Remove from further lead exposure, evaluate for medical removal criteria, and investigate exposure controls Correct answer.
  4. Reassure the worker and continue identical duties without change

Explanation

Elevated blood lead levels require removal from exposure when removal criteria are met, clinical evaluation, and correction of workplace controls. Repeat testing is done sooner than annually at this level. Permanent exclusion from all work is not warranted.

Question 31Occupational Medicine

Which characteristic most distinguishes a prospective cohort study from a case-control study in occupational epidemiology?

  1. It always requires randomization of workers
  2. Disease status determines which participants are selected for exposure assessment
  3. It cannot evaluate rare exposures
  4. Exposure is measured before disease onset and incidence can be calculated directly Correct answer.

Explanation

In a prospective cohort, exposure is assessed before outcomes occur, allowing direct incidence and temporal inference. Case-control studies select participants by disease status and look backward at exposure. Randomization belongs to trials, not observational cohorts.

Question 32Occupational Medicine

A worker develops a pruritic, erythematous rash confined to the dorsal hands and forearms after handling a new epoxy resin. Which diagnosis is most likely?

  1. Miliaria rubra
  2. Allergic contact dermatitis Correct answer.
  3. Photosensitivity dermatitis
  4. Irritant contact dermatitis

Explanation

Epoxy resins are classic type IV sensitizers, and the distribution matches direct contact with the material. Allergic contact dermatitis typically appears after sensitization with a delayed, eczematous pattern. Irritant dermatitis is possible but less specifically linked to a known sensitizer.

Question 33Occupational Medicine

Which exposure measure is most appropriate for evaluating a chronic respiratory hazard with a long latency in a cohort of workers?

  1. A pre-employment spirometry value alone
  2. Cumulative exposure estimated from job histories and measured concentrations Correct answer.
  3. Self-reported symptoms only
  4. A single spot air sample collected on the day of diagnosis

Explanation

Chronic hazards with long latency require reconstruction of exposure over time, often as cumulative exposure from job histories and sampling data. A single current sample cannot represent past dose. Symptoms and baseline spirometry alone do not quantify exposure.

Question 34Occupational Medicine

A worker reports numbness and tingling of the hands with weakness of grip after years of using a vibrating grinder. Which additional finding would most support a diagnosis of hand-arm vibration syndrome?

  1. Bilateral hearing loss
  2. Reduced sensory perception thresholds in the fingers Correct answer.
  3. Unilateral wrist drop
  4. Elevated serum creatine kinase

Explanation

Hand-arm vibration syndrome includes sensorineural and vascular components, and elevated sensory thresholds document the neurologic component. The vascular component is cold-induced blanching. Creatine kinase, wrist drop, and hearing loss are unrelated to vibration neuropathy.

Question 35Occupational Medicine

Which statement best describes the role of a workplace walkthrough in an occupational health evaluation?

  1. It is a legal requirement only for workers under age eighteen
  2. It is performed only after a fatality investigation
  3. It replaces the need for a medical and exposure history
  4. It verifies actual tasks and exposures so that clinical findings can be linked to workplace conditions Correct answer.

Explanation

A walkthrough allows the clinician to observe tasks, controls, and exposures and to reconcile them with the history. It supplements, rather than replaces, the medical and exposure history. It is not limited to fatalities or to minor workers.

Question 36Occupational Medicine

A worker with a positive tuberculin skin test and a normal chest radiograph is being evaluated for employment in a hospital. Which management approach is most appropriate?

  1. Evaluate for latent tuberculosis infection and offer treatment after excluding active disease Correct answer.
  2. Begin airborne isolation of the worker indefinitely
  3. Require a repeat skin test in one week to confirm
  4. Exclude the worker from all patient contact permanently

Explanation

A positive tuberculin test with a normal chest radiograph suggests latent infection, which is treatable and does not preclude employment. Active disease must be excluded before treatment decisions. Permanent exclusion and indefinite isolation are not indicated.

Question 37Occupational Medicine

Which feature most strongly suggests that a reported cluster of illness among office workers is related to building ventilation rather than to a communicable infection?

  1. Symptoms improve away from the building and recur on return Correct answer.
  2. Symptoms spread sequentially between close contacts
  3. Illness occurs in workers regardless of building occupancy
  4. A single pathogen is isolated from multiple workers

Explanation

Temporal association with building occupancy, with improvement away from the building, points to an environmental cause. Person-to-person spread and shared pathogen isolation favor infection. Symptoms independent of occupancy argue against a building-related cause.

Question 38Occupational Medicine

A worker in a poultry processing plant develops fever, myalgia, and cough after exposure to aerosolized bird droppings. Which occupational infection is most likely?

  1. Brucellosis
  2. Legionellosis
  3. Histoplasmosis
  4. Psittacosis Correct answer.

Explanation

Psittacosis is caused by Chlamydia psittaci and follows inhalation of contaminated avian material, producing a flu-like illness with pneumonia. Poultry and bird handling are classic exposures. Legionella, Histoplasma, and Brucella have different environmental reservoirs.

Question 39Occupational Medicine

Which statement about the use of respirators in a workplace respiratory protection program is most accurate?

  1. Surgical masks provide equivalent protection to N95 respirators
  2. Fit testing and medical evaluation are required before required use of a tight-fitting respirator Correct answer.
  3. Respirators eliminate the need for exposure monitoring
  4. A user seal check replaces annual fit testing

Explanation

A written respiratory protection program requires medical evaluation, fit testing, and training before required use. A user seal check is performed each use but does not replace fit testing. Surgical masks are not respirators and do not seal.

Question 40Occupational Medicine

A worker is exposed to noise at 95 dBA for an eight-hour shift. Under the standard 5 dB exchange rate, which action is most appropriate?

  1. Include the worker in a hearing conservation program and reduce exposure through controls Correct answer.
  2. Provide hearing protection only if the worker requests it
  3. Repeat audiometry only after ten years
  4. No action is needed because 95 dBA is below the 100 dBA limit

Explanation

With a 5 dB exchange rate, permissible exposure is halved for each 5 dB increase, so 95 dBA exceeds the 85 dBA action level and requires a hearing conservation program. Exposure should also be reduced through feasible controls. Hearing protection is provided, not optional on request.

Question 41Occupational Medicine

Which statement best describes the purpose of a fitness-for-duty evaluation in occupational medicine?

  1. To determine the worker's eligibility for disability benefits
  2. To replace periodic workplace exposure monitoring
  3. To determine whether a worker can safely perform essential job functions with or without accommodation Correct answer.
  4. To diagnose the cause of a worker's chronic disease

Explanation

Fitness-for-duty evaluation focuses on the match between the worker's functional capacity and essential job demands, considering reasonable accommodation. It is not a diagnostic workup or a benefits determination. It does not substitute for exposure monitoring.

Question 42Occupational Medicine

A worker with a known seizure disorder is applying for a job operating heavy machinery. Which approach best reflects sound occupational medical practice?

  1. Perform an individualized assessment of seizure control and job demands before deciding fitness Correct answer.
  2. Automatically disqualify the worker because of the diagnosis
  3. Allow the worker to operate machinery without any evaluation
  4. Require the worker to disclose all medications to coworkers

Explanation

Fitness decisions should be individualized, weighing seizure frequency, control, and the specific safety demands of the job. Blanket exclusion based on diagnosis alone is not appropriate. Confidentiality of medical information must be maintained.

Question 43Occupational Medicine

Which biomarker is most appropriate for biologic monitoring of recent exposure to toluene?

  1. Urinary delta-aminolevulinic acid
  2. Blood lead level
  3. Serum cholinesterase activity
  4. Urinary hippuric acid measured at the end of the shift Correct answer.

Explanation

Hippuric acid is a metabolite of toluene and reflects recent exposure when collected at the end of the shift. Blood lead, delta-aminolevulinic acid, and cholinesterase relate to metals or pesticides. Each biomarker is specific to its parent compound or toxic mechanism.

Question 44Occupational Medicine

Which statement best describes the role of an employee assistance program in occupational health?

  1. It replaces the employer's obligation to control workplace hazards
  2. It provides direct medical treatment for occupational injuries
  3. It provides confidential assessment and referral for personal and work-related problems affecting performance Correct answer.
  4. It determines workers' compensation eligibility

Explanation

Employee assistance programs offer confidential counseling, assessment, and referral for issues that affect work performance. They do not substitute for hazard control, provide injury treatment, or adjudicate compensation claims. Their value lies in early support and referral.

Question 45Occupational Medicine

A worker is exposed to a chemical with a short biologic half-life and intermittent peak exposures. Which sampling strategy best characterizes peak exposure?

  1. Passive sampling over an entire week
  2. Grab samples collected only at the end of the shift
  3. Personal breathing-zone sampling timed to capture high-exposure tasks Correct answer.
  4. A single eight-hour area sample in the center of the room

Explanation

Peak exposures are best captured with personal breathing-zone samples timed to high-exposure tasks. Fixed-area samples may miss the worker's actual breathing zone. End-of-shift or week-long samples smooth out short peaks.

Question 46Occupational Medicine

Which intervention best exemplifies primary prevention in occupational health?

  1. Providing rehabilitation after a musculoskeletal injury
  2. Installing local exhaust ventilation at the point of contaminant generation Correct answer.
  3. Screening workers for early hearing loss
  4. Monitoring blood lead levels in exposed workers

Explanation

Primary prevention acts before disease occurs by removing or containing the hazard, as with local exhaust ventilation. Screening, rehabilitation, and biologic monitoring occur after exposure or disease onset. They are secondary or tertiary measures.

Question 47Occupational Medicine

A worker reports recurrent episodes of wheezing and chest tightness that begin during the work shift and improve on weekends. Which diagnostic approach is most appropriate?

  1. Chest radiography as the primary diagnostic test
  2. Serial peak flow measurements across work and rest periods with immunologic testing for workplace sensitizers Correct answer.
  3. Immediate permanent removal from work without further testing
  4. A single spirometry measurement before starting employment

Explanation

Work-related asthma is evaluated with serial peak flow or spirometry across work and rest periods to demonstrate work association. Immunologic testing can identify sensitizers such as isocyanates or flour. A single baseline spirometry or radiograph cannot establish work-relatedness.

Question 48Occupational Medicine

Which statement about the recording of occupational injuries and illnesses is most accurate?

  1. All first-aid cases must be recorded on the log
  2. Recording thresholds are determined by the treating physician's preference
  3. Only injuries resulting in lost workdays are recordable
  4. Certain recordable cases must be entered on the log within seven calendar days of learning of the case Correct answer.

Explanation

Recordable injuries and illnesses must be entered within seven calendar days after the employer learns of them. First-aid cases are generally not recordable. Recording criteria are defined by regulation, not physician preference.

Question 49Occupational Medicine

A worker with a chronic musculoskeletal condition requests a modified lifting limit. Which employer response best reflects an interactive accommodation process?

  1. Ask the worker to disclose the full medical record to all supervisors
  2. Discuss the functional limitations and consider reasonable modifications to essential duties Correct answer.
  3. Transfer the worker to unpaid leave without discussion
  4. Deny the request because accommodation is discretionary

Explanation

The interactive process involves discussing functional limitations and exploring reasonable modifications. Accommodation obligations are not purely discretionary. Medical information should be kept confidential and shared only as necessary.

Question 50Occupational Medicine

Which finding is most consistent with chronic beryllium disease in a worker exposed to beryllium dust?

  1. Noncaseating granulomas on lung biopsy with a positive beryllium lymphocyte proliferation test Correct answer.
  2. Diffuse alveolar hemorrhage with negative immunologic testing
  3. Pleural plaques with calcification
  4. Acute airway obstruction reversible with bronchodilators

Explanation

Chronic beryllium disease is a granulomatous lung disorder confirmed by noncaseating granulomas and a positive beryllium lymphocyte proliferation test. It reflects cell-mediated sensitization. Hemorrhage, reversible obstruction, and pleural plaques suggest other processes.