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COHN-S Flashcards

7 cards from real COHN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 COHN-S flashcards as text

  1. Which toxicological concept describes the dose below which no adverse effect is observed in a study population?

    Answer: No-observed-adverse-effect level (NOAEL)

    The NOAEL is the highest dose in a toxicology study at which no statistically significant adverse effects are observed.

  2. A manufacturing employee reports that a co-worker has threatened to 'settle the score' after a disciplinary action. A COHN-S should FIRST:

    Answer: Notify security and management immediately

    Workplace violence threats require immediate notification of security and management to assess risk and protect employee safety.

  3. The ACGIH Threshold Limit Value-Short Term Exposure Limit (TLV-STEL) is defined as the concentration to which workers can be exposed for up to:

    Answer: 15 minutes without adverse effects

    The TLV-STEL is a 15-minute time-weighted average concentration that should not be exceeded during any 15-minute period in the workday.

  4. In occupational health program evaluation, which metric measures the ratio of benefits gained to program costs?

    Answer: Return on investment (ROI)

    ROI calculates the financial return relative to the cost of a program, expressed as a percentage, and is key to demonstrating program value.

  5. A COHN-S is reviewing noise dosimetry results. A worker's full-shift dose reads 105%. Per OSHA 29 CFR 1910.95, which action is REQUIRED?

    Answer: Enroll the worker in a hearing conservation program

    OSHA requires enrollment in a hearing conservation program when an employee's noise exposure equals or exceeds an 8-hour TWA of 85 dBA (50% dose = 85 dBA, so 105% = well above action level).

  6. Which type of epidemiological study is BEST suited for investigating a rare occupational disease with a long latency period?

    Answer: Case-control study

    Case-control studies are efficient for rare diseases because they start with cases (disease present) and match them with controls, allowing retrospective exposure assessment.

  7. Under OSHA's bloodborne pathogen standard, hepatitis B vaccination must be offered to at-risk employees:

    Answer: Within 10 working days of initial assignment

    OSHA 29 CFR 1910.1030 requires employers to offer hepatitis B vaccination to at-risk workers within 10 working days of initial assignment at no cost.