CPE CPE Biomechanics & Musculoskeletal Disorders Questions and Answers 1 — Questions and Answers
Question 1: Which tissue type has the lowest blood supply and therefore the slowest healing rate after ergonomic injury?
- Muscle
- Tendon (Correct answer)
- Bone
- Skin
Correct answer: Tendon
Tendons are avascular tissues with poor blood supply, resulting in very slow healing rates compared to muscle or bone.
Question 2: The NIOSH Lifting Equation uses a Recommended Weight Limit (RWL). What is the load constant (LC) used in the equation?
- 18 kg
- 23 kg (Correct answer)
- 30 kg
- 51 lbs
Correct answer: 23 kg
The NIOSH Lifting Equation uses a load constant of 23 kg (51 lbs), which is the maximum weight recommended under ideal conditions.
Question 3: Which biomechanical model calculates compressive forces on the L5/S1 disc by treating the spine as a simple lever?
- RULA
- Static biomechanical model (Correct answer)
- OWAS
- REBA
Correct answer: Static biomechanical model
The static biomechanical model uses lever mechanics to estimate compressive and shear forces at the L5/S1 intervertebral disc.
Question 4: Carpal tunnel syndrome results from compression of which nerve?
- Radial nerve
- Ulnar nerve
- Median nerve (Correct answer)
- Brachial nerve
Correct answer: Median nerve
Carpal tunnel syndrome is caused by compression of the median nerve as it passes through the carpal tunnel in the wrist.
Question 5: What is the NIOSH Action Limit (AL) for back compressive force at L5/S1?
- 1,000 N
- 2,300 N
- 3,400 N (Correct answer)
- 6,400 N
Correct answer: 3,400 N
NIOSH sets the action limit at 3,400 N of compressive force at L5/S1, above which musculoskeletal injury risk increases significantly.
Question 6: Which of the following is a primary risk factor for work-related upper extremity musculoskeletal disorders (WRUEMSDs)?
- Low workstation height
- High task variety
- Repetitive motion combined with forceful exertion (Correct answer)
- Frequent rest breaks
Correct answer: Repetitive motion combined with forceful exertion
The combination of repetitive motion and forceful exertion is a leading biomechanical risk factor for WRUEMSDs such as tendinitis and CTS.
CPE CPE Biomechanics & Musculoskeletal Disorders Questions and Answers 1
Which tissue type has the lowest blood supply and therefore the slowest healing rate after ergonomic injury?