MHC Ergonomics & Human Factors

Question 1

What is the maximum recommended single-lift weight for an average adult male worker according to NIOSH guidelines?

Accepted Answer

51 lbs

Answer

NIOSH sets 51 lbs (23 kg) as the recommended weight limit under ideal lifting conditions for an average adult male.

Question 2

Which of the following best describes a 'neutral posture' in material handling ergonomics?

Accepted Answer

Keeping joints in their natural, mid-range position

Answer

Neutral posture means maintaining joints near their natural mid-range positions, minimizing stress on muscles and tendons.

Question 3

Which type of musculoskeletal disorder (MSD) is most commonly associated with repetitive heavy lifting in warehouse environments?

Accepted Answer

Lower back injury

Answer

Lower back injuries are the most prevalent MSD in material handling due to the compressive and shear forces placed on lumbar discs during lifting.

Question 4

When performing a team lift, which action is most important to coordinate before moving the load?

Accepted Answer

Establishing a verbal signal to lift and move simultaneously

Answer

A shared verbal signal ensures all workers lift and move at the same moment, preventing uneven loading and loss of balance.

Question 5

Which ergonomic control measure is considered the most effective for reducing manual material handling hazards?

Accepted Answer

Implementing engineering controls to eliminate the hazard

Answer

Engineering controls—such as conveyors, lift assists, and adjustable workstations—eliminate or reduce the hazard at the source, making them the most effective control.

(MHC) Material Handling Certification Practice Test

(MHC) Material Handling Certification Practice Test

MHC Ergonomics & Human Factors