Examination Practice Questions And

Illinois Orthotist-Prosthetist Licensing Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which type of orthosis is primarily used to control motion while

allowing partial mobility?

• Rigid orthosis
• Semi-rigid orthosis
• Flexible orthosis
• Dynamic orthosis

Answer: B. Semi-rigid orthosis

Rationale: Semi-rigid orthoses provide support and control while allowing

limited movement, making them ideal for conditions requiring both stability and flexibility. 1 / 4

• What is the primary purpose of a prosthetic socket?
• To provide cosmetic appearance
• To reduce friction in gait
• To interface between residual limb and prosthesis
• To strengthen residual limb muscles

Answer: C. To interface between residual limb and prosthesis

Rationale: The socket transmits forces and weight from the residual limb to

the prosthesis and is critical for comfort and function.

• Which material is commonly used for definitive prosthetic sockets due

to its lightweight and durability?

• Aluminum
• Wood
• Carbon fiber
• Steel

Answer: C. Carbon fiber

Rationale: Carbon fiber is strong, lightweight, and allows for energy storage

and return in prosthetic applications.

• What is the main advantage of a microprocessor-controlled knee?
• Simplicity of use
• Adaptive gait control
• Lower cost
• Increased weight 2 / 4

Answer: B. Adaptive gait control

Rationale: Microprocessor knees adjust resistance and support dynamically

during gait, improving stability and efficiency.

• Which condition most commonly requires a supramalleolar orthosis

(SMO)?

• Knee osteoarthritis
• Hip dysplasia
• Pediatric foot/ankle instability
• Lower back pain

Answer: C. Pediatric foot/ankle instability

Rationale: SMOs provide mediolateral stability at the ankle while allowing

free sagittal plane movement, often used in children with hypotonia.

• The most appropriate suspension for a transtibial prosthesis with

short residual limb is:

• Suction
• Pin-lock
• Elevated vacuum
• Strap

Answer: C. Elevated vacuum

Rationale: Elevated vacuum systems improve suspension and volume

management, especially in short residual limbs where traditional suction may fail. 3 / 4

• What is the primary function of an AFO with a plantarflexion stop?
• Prevent dorsiflexion
• Allow free motion
• Prevent foot drop during swing phase
• Limit inversion

Answer: C. Prevent foot drop during swing phase

Rationale: A plantarflexion stop prevents excessive plantarflexion, helping

the foot clear the ground during swing.

• Which prosthetic foot provides the most energy return for running

activities?

• SACH foot
• Single-axis foot
• Carbon fiber dynamic response foot
• Articulated solid foot

Answer: C. Carbon fiber dynamic response foot

Rationale: Carbon fiber dynamic feet store and release energy, enhancing

running efficiency and performance.

• The primary biomechanical goal of a hip-knee-ankle-foot orthosis

(HKAFO) is to:

• Improve cardiovascular fitness
• Reduce pain
• Stabilize hip, knee, and ankle for ambulation
• Increase flexibility
• / 4