ABC Prosthetics Written Exam 67 Questions
and Answers Latest 2025.
What movements are required to operate a standard trans-radial prosthesis? -
✔️Biscapular abduction and Gleno-humeral flexion
What is the prehension pattern most frequently used by prosthetic hands? -
✔️Palmar
What is the proper orientation when taking an impression for all levels of trans-radial amputation? -
✔️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 -
✔️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? -
✔️Extensor Pollicis Brevis
Polycentric Hinges are used to -
✔️Relieve cubital bunching
Which is not a forearm flexor?
- Biceps
- Brachialis
-Supinator
-Pronator Teres -
✔️Supinator
The muscles that comprise the rotator cuff are -
✔️Teres minor, supraspinatus, infraspinatus, subscapularis
, What is the main cause of upper extremity amputation? -
✔️Trauma
How much can the single axis hinge restrict pronation-supination and still be acceptable for patient
use? -
✔️Trick question
Single axis hinge negates pronation-supination
The main advantage of the Wrist Flexion Unit over the Flexion Wrist is -
✔️Wrist flexion unit can rotate in all planes
How many positions does a positive locking hinge have? -
✔️11
The correct location of the cross point on a standard trans-radial figure of eight prosthetic harness is:
-
✔️Inferior to C7 toward the sound side
What age is best to fit a child with an upper limb deficiency at birth? -
✔️As early as three months
Which muscle is primarily responsible for scapular abduction? -
✔️Serratus Anterior
When would a Krukenberg amputation be recommended? -
✔️Blind bilateral trans-radial patient
Upper Limb Supracondylar Suspension -
✔️- Is frequently used with external power prostheses
- May restrict elbow flexion
- Frequently uses figure of 9 harnessing with body powered prostheses
and Answers Latest 2025.
What movements are required to operate a standard trans-radial prosthesis? -
✔️Biscapular abduction and Gleno-humeral flexion
What is the prehension pattern most frequently used by prosthetic hands? -
✔️Palmar
What is the proper orientation when taking an impression for all levels of trans-radial amputation? -
✔️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 -
✔️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? -
✔️Extensor Pollicis Brevis
Polycentric Hinges are used to -
✔️Relieve cubital bunching
Which is not a forearm flexor?
- Biceps
- Brachialis
-Supinator
-Pronator Teres -
✔️Supinator
The muscles that comprise the rotator cuff are -
✔️Teres minor, supraspinatus, infraspinatus, subscapularis
, What is the main cause of upper extremity amputation? -
✔️Trauma
How much can the single axis hinge restrict pronation-supination and still be acceptable for patient
use? -
✔️Trick question
Single axis hinge negates pronation-supination
The main advantage of the Wrist Flexion Unit over the Flexion Wrist is -
✔️Wrist flexion unit can rotate in all planes
How many positions does a positive locking hinge have? -
✔️11
The correct location of the cross point on a standard trans-radial figure of eight prosthetic harness is:
-
✔️Inferior to C7 toward the sound side
What age is best to fit a child with an upper limb deficiency at birth? -
✔️As early as three months
Which muscle is primarily responsible for scapular abduction? -
✔️Serratus Anterior
When would a Krukenberg amputation be recommended? -
✔️Blind bilateral trans-radial patient
Upper Limb Supracondylar Suspension -
✔️- Is frequently used with external power prostheses
- May restrict elbow flexion
- Frequently uses figure of 9 harnessing with body powered prostheses
