Free Part B: Ear Impression Practicum Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Part B: Ear Impression Practicum practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A fitter has laid out instruments for an ear impression. None has been cleaned since its last use. When must the fitter clean them to meet the Board's safety requirement?

   1. A. Clean every instrument before its first use on the model.
   2. B. Clean every instrument after the initial otoscopic exam.
   3. C. Clean every instrument after positioning the otoblock.
   4. D. Clean every instrument after removing the impression.

   Answer: A

   Explanation: The Board requires "Cleaned ALL instruments before use". Because these instruments remain uncleaned, cleaning after otoscopy, block placement, or impression removal misses the pre-use requirement.

   Reference: North Carolina Board Part B Practicum Scoring Guidelines — Procedure, Safety Practices

2. 2In the stock-impression evaluation, where should the otoblock be relative to the impression material?

   1. A. Flush at the medial canal end
   2. B. Recessed at the lateral edge
   3. C. Beyond the second bend
   4. D. Detached from the canal end

   Answer: A

   Explanation: The Board's first stock-mold criterion is: "Is the otoblock flush with the material at the medial end of the impression (canal end)?"

   Reference: Part B Scoring Guidelines (2026) — Stock Mold criterion 1

3. 3While labeling an external-ear image, a candidate sees a small skin-covered cartilaginous projection just anterior to the auditory meatus. Which landmark should be labeled?

   1. A. Tragus
   2. B. Antitragus
   3. C. Helix crus
   4. D. Antihelix

   Answer: A

   Explanation: The NIH anatomy description identifies the "Tragus" as "a posterior, slightly inferior, protrusion of skin-covered cartilage, anterior to the auditory meatus." The antitragus, helix crus, and antihelix are separate labeled auricular structures, not that anterior projection.

   Reference: NIH Elements of Morphology: Ear Anatomy — Ear anatomy, Tragus definition

4. 4In a candidate's impression, the tragus and helix have distinct outlines, but the shallow fold linking them has lost its shape. How should a professional evaluator judge that local contour?

   1. A. Adequate because the tragus and helix are each individually defined.
   2. B. Adequate because canal depth and concha definition can compensate.
   3. C. Inadequate because the intervening tragus–helix area lacks definition.
   4. D. Adequate because otoblock position and helix definition can compensate.

   Answer: C

   Explanation: The scoring guide asks "Is the area between the tragus and helix adequately defined?" This is a separate contour judgment. Distinct neighboring landmarks, canal depth, and block position cannot make a flattened intervening region adequately defined.

   Reference: North Carolina Board Part B Practicum Scoring Guidelines — Professional Evaluation, criterion 5

5. 5A fitter will examine the model's ear with an otoscope and later break the seal to remove the impression. When should instruction to the model begin for those two actions?

   1. A. Before otoscopy and before the impression seal is broken.
   2. B. Before otoscopy and after the impression seal is broken.
   3. C. After otoscopy and before the impression seal is broken.
   4. D. After otoscopy and after the impression seal is broken.

   Answer: A

   Explanation: The scoring guide says "Began instruction before performing the otoscopic exam" and "Began instruction before breaking the seal of the impression". Both maneuvers therefore require instruction to have begun beforehand; the other schedules delay at least one instruction.

   Reference: North Carolina Board Part B Practicum Scoring Guidelines — Procedure, Safety Practices, instruction checkpoints

6. 6Which defect is the stock-mold question about impression material passing around the otoblock designed to detect?

   1. A. Blow-by
   2. B. Canal underlength
   3. C. Helix underfill
   4. D. Tragus flattening

   Answer: A

   Explanation: Criterion 2 asks: "Has the impression material seeped around the otoblock (blow-by)?"

   Reference: Part B Scoring Guidelines (2026) — Stock Mold criterion 2

7. 7A candidate's submitted impression shows a cleft-like line crossing the conchal surface. Which interpretation of that finding best follows the Board's evaluation guidance?

   1. A. A weld mark from impression-taking in a critical region.
   2. B. A shiny no-contact patch on an otherwise smooth contour.
   3. C. An underfilled conchal area with an indistinct surface contour.
   4. D. A normal imprint of a cartilage fold across the concha.

   Answer: A

   Explanation: The professional criterion includes "impression-taking anomalies, including but not limited to weld marks, located in critical regions of the impression". The Board's illustration states "The large weld in this area appears as a cleft in the material." A cleft-like seam in the concha therefore matches a weld anomaly; shine, underfill, and a normal fold describe different appearances.

   Reference: North Carolina Board Part B Practicum Scoring Guidelines — Professional Evaluation, criterion 7

8. 8A fitter is about to start the model's ear-impression procedure. Which glove-use plan satisfies the Board's requirement?

   1. A. Put gloves on before the procedure and wear them throughout it.
   2. B. Put gloves on after otoscopy and wear them through removal.
   3. C. Put gloves on before otoscopy and remove them during filling.
   4. D. Put gloves on before insertion and remove them before seal release.

   Answer: A

   Explanation: The Board says "Gloves were worn throughout the procedure"; its overview also directs gloves before beginning. Each alternative leaves part of the procedure without gloves.

   Reference: North Carolina Board Part B Practicum Scoring Guidelines — Procedure, Safety Practices, gloves

9. 9What canal landmark establishes adequate stock-impression length on Part B?

   1. A. The second bend
   2. B. The canal entrance
   3. C. The first bend only
   4. D. The tympanic membrane

   Answer: A

   Explanation: The criterion asks whether the impression is "of an adequate length to show the second bend of the ear canal."

   Reference: Part B Scoring Guidelines (2026) — Stock Mold criterion 3

10. 10A candidate submits an impression intended for a full-shell earmold for an 80 dB HL flat hearing loss. The canal reaches the second bend, but the helix and antitragus are incompletely captured. How should its adequacy be judged?

    1. A. Inadequate: the full-shell impression must include those outer-ear landmarks.
    2. B. Adequate: reaching the second bend alone establishes full-shell suitability.
    3. C. Adequate: outer-ear landmarks matter only for a CIC hearing-aid shell.
    4. D. Inadequate only when the otoblock also permits material blow-by.

    Answer: A

    Explanation: The Board requires the impression to support a "full-shell earmold" for a high-gain instrument and says "Each ear impression must include the full helix, crus of the helix, tragus and antitragus." Reaching the second bend does not cure absent required outer-ear structures. The professional criterion separately asks about adequacy for a full-shell mold for an 80 dB HL flat loss.

    Reference: North Carolina Board Part B Evaluating Ear Impression — Part B Evaluating Ear Impression, opening requirements