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OPC Orthotics Written Certification Examination (Canada)

Practice Questions105 questions

2026 Statistics

Key Facts: OPC Prosthetics Written Exam

150 MCQs

Total multiple-choice questions on the prosthetics written examination

OPC Certification Exam Handbook

3 hours

Time limit allowed to complete the online written exam

OPC Certification Exam Handbook

CAD $546.36

2026 written examination fee (excluding application fee)

OPC Fee Schedule

Criterion-referenced

No fixed pass percentage; scores are evaluated against a panel-set competency cut score

OPC Exam Scoring Guidelines

36%

Weighting of Treatment Implementation and Evaluation on the OPC prosthetics written exam

OPC Examination Blueprint Report

100

Free practice questions in this bank

OpenExamPrep

The OPC Prosthetics Written Exam is the mandatory written component for Certified Prosthetist (CP) certification in Canada, administered on computer in 3 hours (150 questions). The blueprint covers five domains: Patient Assessment (17%), Treatment Planning (15%), Treatment Implementation and Evaluation (36%), Ongoing Treatment and Re-evaluation (29%), and Professional Practice (3%). The exam is criterion-referenced with a cut score set by expert panels. The 2026 exam fee is CAD $546.36 (plus CAD $169.74 application fee). This 100-question practice bank provides original multiple-choice questions aligned with Canadian prosthetic clinical standards and biomechanics.

Sample OPC Prosthetics Written Practice Questions

Try these sample questions to test your OPC Prosthetics Written exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 105+ question experience with AI tutoring.

1A prosthetist is conducting a physical assessment on a patient with a transfemoral amputation. Which clinical assessment test is most appropriate to evaluate the presence and severity of a hip flexion contracture?

A.Thomas test

B.Trendelenburg test

C.Ober's test

D.Lachman test

Explanation: The Thomas test is used to evaluate hip flexion contractures by having the patient lie supine, flexing the contralateral hip to flatten the lumbar lordosis, and measuring the angle of elevation of the ipsilateral femur from the examination table. In transfemoral amputees, identifying a hip flexion contracture is vital as it directly dictates the initial flexion alignment of the socket.

2During the palpation of a transtibial residual limb, which anatomical area must be identified as pressure-sensitive, requiring relief in a standard patellar tendon-bearing (PTB) socket?

A.Patellar tendon

B.Anterior crest of the tibia

C.Medial tibial flare

D.Fibular shaft

Explanation: The anterior crest of the tibia is a bony prominence with very little subcutaneous tissue coverage, making it highly pressure-sensitive and prone to skin breakdown. A patellar tendon-bearing (PTB) socket must provide relief over this area, whereas the patellar tendon, medial tibial flare, and fibular shaft are pressure-tolerant regions.

3A patient presents with a conical-shaped transfemoral residual limb. What is the clinical implication of this shape during socket design and fitting?

A.Greater soft tissue redundancy, requiring aggressive compression of the proximal tissues to prevent skeletal migration

B.Reduced distal circumference relative to proximal, facilitating easier entry but increasing the risk of distal voiding and skin breakdown if not appropriately contoured

C.An anatomical shape that is highly resistant to rotational forces, allowing the use of simpler, non-conforming suspension systems

D.A shape indicating acute postoperative edema, which requires postponing casting until it stabilizes into a cylindrical shape

Explanation: A conical residual limb has a larger proximal circumference and tapers distally, which makes socket entry easier. However, it increases the risk of distal voiding (lack of total contact) and skin breakdown if the distal portion is not properly contoured to maintain total contact and prevent distal migration of the limb into the socket.

4When evaluating sensory loss in a patient with a diabetic transtibial amputation, which Semmes-Weinstein monofilament size is the clinical standard to confirm loss of protective sensation?

A.3.61 monofilament (0.4 grams of force)

B.4.14 monofilament (1.0 gram of force)

C.5.07 monofilament (10.0 grams of force)

D.6.10 monofilament (100.0 grams of force)

Explanation: The 5.07 Semmes-Weinstein monofilament, which delivers 10 grams of linear force, is the internationally recognized clinical standard for detecting loss of protective sensation. Patients who cannot feel this filament are at high risk for neuropathic ulcerations and require total-contact socket designs with soft liners to minimize shear and peak pressures.

5During the assessment of a bilateral upper limb amputee, what is the primary consideration when evaluating hand dominance and functional tasks?

A.Hand dominance is irrelevant because bilateral upper limb amputees are trained to be completely symmetrical in their bi-manual controls.

B.Identifying the patient's pre-amputation hand dominance to establish which side will receive a voluntary closing terminal device and which will receive a voluntary opening device.

C.Evaluating residual limb length, range of motion, and muscle strength on both sides to determine which limb can most effectively act as the dominant 'active' system.

D.Ensuring that the shorter residual limb is designated as the dominant limb to maximize its limited leverage through myoelectric amplification.

Explanation: In bilateral upper limb amputees, hand dominance is re-established based on physical capability. The side with the longer residual limb, better range of motion, and greater muscle strength is typically designated as the dominant 'active' hand for fine motor control, while the other side acts as the helper or 'passive/assistive' hand.

6A patient with a transtibial amputation presents with a 15-degree knee flexion contracture. During gait assessment, how does this joint limitation affect the biomechanics of loading response and stance phase?

A.It decreases the demand on the quadriceps by shifting the ground reaction force vector anterior to the knee joint center.

B.It requires the patient to hyperextend the hip on the ipsilateral side to achieve knee stability during midstance.

C.It increases the knee flexion moment during loading response, requiring greater quadriceps eccentric muscle activity to prevent knee collapse.

D.It causes a premature heel rise during terminal stance, reducing the step length on the prosthetic side.

Explanation: A knee flexion contracture prevents the knee from extending fully, causing the ground reaction force (GRF) vector to pass posterior to the knee joint axis during loading response and midstance. This creates an increased knee flexion moment, which requires greater quadriceps muscle strength (eccentric contraction) to stabilize the knee and prevent collapse.

7Which clinical finding is a primary advantage of a knee disarticulation amputation over a transfemoral amputation?

A.A long, bulbous residual limb that allows distal end weight-bearing and provides rotational control of the socket.

B.The ability to use standard, internal-locking prosthetic knee joints to keep the knee centers level.

C.Superior cosmetic appearance due to the shortened distal end of the femur.

D.Elimination of the need for any proximal socket suspension or harnessing systems.

Explanation: A knee disarticulation preserves the full length of the femur and the femoral condyles. This bulbous distal end allows for direct distal end weight-bearing (reducing proximal socket pressure) and provides excellent rotational control of the socket due to the condylar shape.

8A prosthetist performs manual muscle testing (MMT) on a transtibial patient's knee extensors. The patient can complete full range of motion against gravity and tolerate moderate resistance. What MMT grade should be documented?

A.Grade 2 (Poor)

B.Grade 3 (Fair)

C.Grade 4 (Good)

D.Grade 5 (Normal)

Explanation: According to the Kendall manual muscle testing scale, Grade 4 (Good) is defined as the ability to complete full range of motion against gravity and tolerate moderate resistance. Grade 3 corresponds to completing ROM against gravity but with no resistance, while Grade 5 tolerates maximum resistance.

9Why is it important to assess the mobility of scar tissue along the distal end of a transtibial residual limb during physical evaluation?

A.Adherent scars increase the vascular flow to the distal tissues, making them highly pressure-tolerant.

B.Non-mobile, adherent scars are highly susceptible to skin breakdown due to shear forces generated between the bone, scar tissue, and socket wall.

C.Adherent scars indicate that a pin-locking suspension system is contraindicated due to lack of proximal tissue expansion.

D.Scar mobility dictates whether a patient should undergo a surgical revision to remove the fibular head.

Explanation: Adherent (non-mobile) scars are bound down to the underlying bone or deep fascial layers. During ambulation, the vertical and rotational forces inside the socket create shear stress. Because the skin cannot slide relative to the underlying bone, this shear stress is concentrated at the bone-scar interface, leading to pain and rapid skin breakdown.

10A patient with a transtibial prosthesis exhibits an excessive knee flexion moment during loading response (heel strike to foot flat). What anatomical finding during the assessment would most likely explain this gait deviation?

A.Weakness of the gluteus maximus

B.Knee extensor (quadriceps) weakness

C.Spasticity of the gastrocnemius-soleus complex

D.Weakness of the tibialis anterior

Explanation: During loading response, the knee naturally flexes to absorb shock, and this is controlled eccentrically by the quadriceps. If the quadriceps are weak (MMT grade <3+), the patient cannot control this flexion moment, causing the knee to feel unstable or buckled. To compensate, the patient may walk with a hyperextended knee or take a shorter step.

About the OPC Prosthetics Written Exam

The OPC Prosthetics Written Certification Examination is the multiple-choice written component of the national certification process required to become a Certified Prosthetist (CP) in Canada. Administered by Orthotics Prosthetics Canada (OPC), the exam evaluates entry-to-practice clinical and technical competency. The written exam is a mandatory prerequisite for challenging the practical certification examination. It is a 3-hour computer-based exam consisting of approximately 150 multiple-choice questions with four options each. The exam is structured around five core practice domains: Patient Assessment (subjective and objective evaluation), Treatment Planning (biomechanical analysis and device design), Treatment Implementation and Evaluation (measuring, fitting, and aligning prosthetic devices like transtibial, transfemoral, and upper limb prostheses), Ongoing Treatment and Re-evaluation (adjustments and follow-ups), and Professional Practice (ethics and record keeping). The exam is criterion-referenced with a psychometrically determined cut score.

Assessment

Computer-based written examination containing 150 multiple-choice questions. Questions test theoretical knowledge, clinical assessment, biomechanics, device design, and professional ethics.

Time Limit

3 hours (180 minutes)

Passing Score

Criterion-referenced. Standards (cut scores) are established by panels of subject matter experts representing the minimum level of knowledge required to enter professional practice.

Exam Fee

CAD $546.36 plus CAD $169.74 application fee (Orthotics Prosthetics Canada (OPC))

OPC Prosthetics Written Exam Content Outline

17%

Patient Assessment

Patient interviewing, history taking, review of pathological conditions, physical assessment (range of motion, muscle strength testing, residual limb evaluation, suspension options, gait analysis, sensation, and skin integrity).

15%

Treatment Planning

Formulating treatment goals, prosthetic design selection (materials, components, joints, suspension type), biomechanical socket design analysis, and consultation with the healthcare team.

36%

Treatment Implementation and Evaluation (Prosthetics)

Measuring, casting, modifying, fabricating, and fitting of lower limb (transtibial, transfemoral) and upper limb prostheses. Evaluating fit, alignment, suspension stability, gait parameters, and structural integrity.

29%

Ongoing Treatment and Re-evaluation

Conducting follow-up evaluations, identifying mechanical or clinical wear issues, adjusting alignment, repairing components, modifying sockets, and instructing patients/caregivers on usage.

Professional Practice

Adhering to the OPC Canons of Ethical Conduct, safety regulations, privacy legislation (PIPEDA), record-keeping protocols, and continuing education.

How to Pass the OPC Prosthetics Written Exam

What You Need to Know

Passing score: Criterion-referenced. Standards (cut scores) are established by panels of subject matter experts representing the minimum level of knowledge required to enter professional practice.
Assessment: Computer-based written examination containing 150 multiple-choice questions. Questions test theoretical knowledge, clinical assessment, biomechanics, device design, and professional ethics.
Time limit: 3 hours (180 minutes)
Exam fee: CAD $546.36 plus CAD $169.74 application fee

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

OPC Prosthetics Written Study Tips from Top Performers

1Study socket design and biomechanics: understand pressure-tolerant and pressure-sensitive areas for transtibial (e.g., PTB vs. total surface bearing) and transfemoral (e.g., ischial containment vs. quadrilateral) sockets.

2Understand suspension systems: review the advantages, disadvantages, and indications for suction, pin-locking, vacuum-assisted, anatomical (e.g., supracondylar), and strap suspension systems.

3Review gait deviations: identify key deviations (e.g., excessive knee flexion in stance, vaulting, lateral trunk lean, whip) and their clinical and mechanical causes (e.g., socket too far forward, heel too stiff).

4Know component mechanics: review the difference between SACH feet, single-axis, multi-axis, and dynamic response feet, as well as mechanical vs. microprocessor knees.

5Understand upper limb prostheses: review myoelectric control concepts, body-powered harness configurations, and cable controls for dual-control and single-control systems.

6Memorize the OPC Canons of Ethical Conduct: expect questions on patient consent, conflicts of interest, and professional boundaries.

Frequently Asked Questions

What is the format of the OPC Prosthetics Written Exam?

The exam is a proctored, computer-based written test containing approximately 150 multiple-choice questions, with 4 options each, to be completed in 3 hours.

Is the written exam a prerequisite for the practical exam?

Yes, candidates must successfully pass the OPC Prosthetics Written Examination before they are eligible to apply for and challenge the corresponding Practical Examination.

What is the passing score for the OPC written exam?

OPC uses a criterion-referenced scoring system. A panel of subject matter experts determines a cut score representing minimum entry-level competence, so there is no fixed pass percentage.

How much does the OPC Prosthetics Written Exam cost?

The written exam fee is CAD $546.36, plus a non-refundable application fee of CAD $169.74 (subject to annual updates).

What areas are tested on the Prosthetics Written Exam?

It tests five practice domains: Patient Assessment (17%), Treatment Planning (15%), Treatment Implementation and Evaluation (36%), Ongoing Treatment and Re-evaluation (29%), and Professional Practice (3%).