NSC Ergonomics 5

Question 1

Which NSC ergonomics concept describes redesigning a task so that the heaviest or most awkward part of the job is performed less frequently?

Accepted Answer

Task redesign

Answer

Task redesign permanently modifies how a job is performed to reduce exposure to ergonomic risk factors at the source.

Question 2

Which of the following is a sign that a worker's chair is NOT properly adjusted for ergonomic seating?

Accepted Answer

Lower back is unsupported and rounded

Answer

A rounded lower back (loss of lumbar curve) indicates the chair's lumbar support or seat pan angle is not adjusted correctly.

Question 3

What is the recommended maximum angle of wrist extension or flexion during repetitive tasks to reduce MSD risk?

Accepted Answer

15 degrees

Answer

NSC and ergonomic guidelines recommend keeping wrist deviation below 15 degrees from neutral to minimize injury risk during repetitive work.

Question 4

A truck driver develops low back pain after years of long-distance driving. Which ergonomic intervention would MOST directly address whole-body vibration exposure?

Accepted Answer

Installing a suspension seat with vibration-dampening capability

Answer

Suspension seats with vibration-dampening systems directly attenuate whole-body vibration transmission from the vehicle to the driver.

Question 5

Which of the following administrative controls helps manage ergonomic risk in a high-repetition assembly job?

Accepted Answer

Implementing scheduled micro-breaks and job rotation

Answer

Micro-breaks and job rotation are administrative controls that reduce cumulative exposure time to repetitive motion risk factors.

NSC Practice Test

NSC Practice Test

NSC Ergonomics 5