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Quality Assurance Protocols Flashcards

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

Read the first 7 Quality Assurance Protocols flashcards as text
  1. What action must a BAT take if an EBT displays an 'invalid sample' or 'interference detected' message during a test?

    Answer: Void the test and document the malfunction on the CCF

    An 'invalid sample' message means the test cannot be evaluated; the BAT must void the test and note the reason on the Alcohol Testing Form.

  2. Which of the following is a required element of a Quality Assurance Plan (QAP) for EBT devices?

    Answer: Inspection, maintenance, and calibration procedures

    A QAP must include documented procedures for inspection, maintenance, and calibration of each EBT model used.

  3. An EBT's self-diagnostic check fails at the start of a test sequence. The BAT should:

    Answer: Remove the device from service

    A failed self-diagnostic indicates the instrument may not be functioning correctly and it must be removed from service.

  4. What is the purpose of the 'air blank' reading that an EBT conducts before and between breath samples?

    Answer: To confirm the breath channel is free of residual alcohol

    The air blank reading ensures no residual alcohol remains in the instrument's breath chamber from a previous test or environmental source.

  5. According to 49 CFR Part 40, what value must an air blank reading show to allow testing to continue?

    Answer: 0.000 g/210L

    The air blank must read 0.000 g/210L; any non-zero reading requires the BAT to take corrective action before proceeding.

  6. How long must records of EBT calibration checks be retained under DOT regulations?

    Answer: 5 years

    Calibration check records must be retained for 5 years under 49 CFR Part 40.333.

  7. A BAT discovers that the last calibration check sticker on the EBT expired two days ago. The correct course of action is to:

    Answer: Remove the device from service until calibration is completed

    An EBT that has exceeded its calibration interval must be removed from service and recalibrated before it can be used for testing.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. transportation.gov — Test delivery, eligibility, retake policy, score validity · verified Oct 2026
  2. ecfr.gov — Exam format, passing score, renewal · verified Oct 2026