ABC Prosthetics Written Exam (2025) | Complete
Study Guide with Verified Questions & Answers
What movements are required to operate a standard
trans-radial prosthesis? - Answer Biscapular abduction
and Gleno-humeral flexion
What is the prehension pattern most frequently used by
prosthetic hands? - Answer Palmar
What is the proper orientation when taking an impression
for all levels of trans-radial amputation? - Answer Neutral
Pro-Supination, 90 degrees
Determine efficiency if a force of 6 lbs is necessary to
open the TD fully and 9 lbs are needed at the hanger -
Answer 67% (terminal device force divided by hanger
force)
Which muscle acts in the same way a control cable pulls
on the thumb of the terminal device? - Answer Extensor
Pollicis Brevis
, Polycentric Hinges are used to - Answer Relieve cubital
bunching
Which is not a forearm flexor?
- Biceps
- Brachialis
-Supinator
-Pronator Teres - Answer Supinator
The muscles that comprise the rotator cuff are - Answer
Teres minor, supraspinatus, infraspinatus, subscapularis
What is the main cause of upper extremity amputation? -
Answer Trauma
How much can the single axis hinge restrict pronation-
supination and still be acceptable for patient use? -
Answer Trick question
Single axis hinge negates pronation-supination
The main advantage of the Wrist Flexion Unit over the
Flexion Wrist is - Answer Wrist flexion unit can rotate in all
planes
Study Guide with Verified Questions & Answers
What movements are required to operate a standard
trans-radial prosthesis? - Answer Biscapular abduction
and Gleno-humeral flexion
What is the prehension pattern most frequently used by
prosthetic hands? - Answer Palmar
What is the proper orientation when taking an impression
for all levels of trans-radial amputation? - Answer Neutral
Pro-Supination, 90 degrees
Determine efficiency if a force of 6 lbs is necessary to
open the TD fully and 9 lbs are needed at the hanger -
Answer 67% (terminal device force divided by hanger
force)
Which muscle acts in the same way a control cable pulls
on the thumb of the terminal device? - Answer Extensor
Pollicis Brevis
, Polycentric Hinges are used to - Answer Relieve cubital
bunching
Which is not a forearm flexor?
- Biceps
- Brachialis
-Supinator
-Pronator Teres - Answer Supinator
The muscles that comprise the rotator cuff are - Answer
Teres minor, supraspinatus, infraspinatus, subscapularis
What is the main cause of upper extremity amputation? -
Answer Trauma
How much can the single axis hinge restrict pronation-
supination and still be acceptable for patient use? -
Answer Trick question
Single axis hinge negates pronation-supination
The main advantage of the Wrist Flexion Unit over the
Flexion Wrist is - Answer Wrist flexion unit can rotate in all
planes
