CPE CPE Biomechanics & Musculoskeletal Disorders Questions and Answers 2 — Questions and Answers
Question 1: Tendinitis is best characterized as inflammation of which structure?
- Bursa
- Joint capsule
- Tendon sheath or tendon itself (Correct answer)
- Vertebral disc
Correct answer: Tendon sheath or tendon itself
Tendinitis refers to inflammation of the tendon or its surrounding sheath, commonly caused by repetitive overuse movements.
Question 2: In the context of manual material handling, what does the Lifting Index (LI) represent?
- The ratio of actual load to the RWL (Correct answer)
- The maximum safe load in kilograms
- The number of lifts per hour
- The vertical distance of the lift
Correct answer: The ratio of actual load to the RWL
The Lifting Index is calculated by dividing the actual load lifted by the Recommended Weight Limit, indicating relative injury risk.
Question 3: Which joint posture places the greatest compressive force on the intervertebral discs?
- Neutral lumbar lordosis
- Trunk flexion greater than 45 degrees (Correct answer)
- Slight trunk extension
- Lateral bending less than 10 degrees
Correct answer: Trunk flexion greater than 45 degrees
Trunk flexion greater than 45 degrees dramatically increases disc compressive and shear forces, especially at L5/S1.
Question 4: De Quervain's tenosynovitis specifically affects which tendons?
- Extensor carpi ulnaris
- Abductor pollicis longus and extensor pollicis brevis (Correct answer)
- Flexor digitorum superficialis
- Flexor carpi radialis
Correct answer: Abductor pollicis longus and extensor pollicis brevis
De Quervain's tenosynovitis is inflammation of the abductor pollicis longus and extensor pollicis brevis tendons at the wrist's radial side.
Question 5: What does the term 'cumulative trauma disorder' (CTD) imply about the cause of injury?
- A single acute traumatic event
- Gradual tissue damage from repeated low-level exposures over time (Correct answer)
- Chemical exposure in the workplace
- Psychosocial stress causing physical symptoms
Correct answer: Gradual tissue damage from repeated low-level exposures over time
CTDs develop from repetitive micro-traumas that accumulate over time when tissue damage occurs faster than the body can repair.
Question 6: Which factor does NOT directly increase the biomechanical stress of a manual lift?
- Horizontal distance from the body
- Lifting frequency
- Eye color of the worker (Correct answer)
- Asymmetric twisting of the trunk
Correct answer: Eye color of the worker
Eye color is a personal characteristic unrelated to biomechanical stress; horizontal distance, frequency, and twisting all amplify spinal loading.
CPE CPE Biomechanics & Musculoskeletal Disorders Questions and Answers 2
Tendinitis is best characterized as inflammation of which structure?