Ergonomics Flashcards
7 cards from real NSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ergonomics flashcards as text
Which NSC ergonomics concept describes redesigning a task so that the heaviest or most awkward part of the job is performed less frequently?
Answer: Task redesign
Task redesign permanently modifies how a job is performed to reduce exposure to ergonomic risk factors at the source.
Which of the following is a sign that a worker's chair is NOT properly adjusted for ergonomic seating?
Answer: Lower back is unsupported and rounded
A rounded lower back (loss of lumbar curve) indicates the chair's lumbar support or seat pan angle is not adjusted correctly.
What is the recommended maximum angle of wrist extension or flexion during repetitive tasks to reduce MSD risk?
Answer: 15 degrees
NSC and ergonomic guidelines recommend keeping wrist deviation below 15 degrees from neutral to minimize injury risk during repetitive work.
A truck driver develops low back pain after years of long-distance driving. Which ergonomic intervention would MOST directly address whole-body vibration exposure?
Answer: Installing a suspension seat with vibration-dampening capability
Suspension seats with vibration-dampening systems directly attenuate whole-body vibration transmission from the vehicle to the driver.
Which of the following administrative controls helps manage ergonomic risk in a high-repetition assembly job?
Answer: Implementing scheduled micro-breaks and job rotation
Micro-breaks and job rotation are administrative controls that reduce cumulative exposure time to repetitive motion risk factors.
In ergonomic lifting guidelines, what is the recommended zone for lifting loads to minimize spine stress?
Answer: Knuckle to shoulder height (power zone)
The 'power zone' — roughly knuckle to shoulder height — keeps lifts closest to the body's center of gravity, minimizing spine loading.
Which MSD is characterized by numbness, tingling, and pain in the thumb, index, and middle fingers due to nerve compression at the wrist?
Answer: Carpal tunnel syndrome
Carpal tunnel syndrome results from compression of the median nerve within the carpal tunnel, causing symptoms in the thumb, index, and middle fingers.