MHC Ergonomics & Human Factors 2

Question 1

Which work practice best reduces cumulative trauma disorders (CTDs) in a material handling facility?

Accepted Answer

Incorporating scheduled micro-breaks and job rotation

Answer

Scheduled micro-breaks and job rotation reduce prolonged exposure to repetitive motions and awkward postures, lowering the risk of CTDs.

Question 2

What is the primary purpose of a 'lift assist device' in a warehouse?

Accepted Answer

To reduce the manual force required to lift and position loads

Answer

Lift assist devices (vacuum lifters, scissor lifts, jib cranes) reduce the physical effort workers must exert, directly lowering injury risk.

Question 3

Awkward postures in material handling are defined as positions that:

Accepted Answer

Deviate joints significantly from neutral alignment

Answer

Awkward postures deviate joints from neutral alignment—such as bending, twisting, or overreaching—increasing stress on muscles, tendons, and joints.

Question 4

Which anthropometric principle is most important when designing ergonomic workstations for material handling?

Accepted Answer

Designing for the 5th to 95th percentile range of workers

Answer

Workstations should accommodate the 5th to 95th percentile of the workforce to ensure the majority of workers can use the station safely and comfortably.

Question 5

Which symptom is a common early warning sign of a work-related musculoskeletal disorder that workers should report immediately?

Accepted Answer

Persistent tingling, numbness, or aching in the hands or back

Answer

Persistent tingling, numbness, or aching—especially if they continue off the job—indicate developing tissue damage and should be reported early for intervention.

(MHC) Material Handling Certification Practice Test

(MHC) Material Handling Certification Practice Test

MHC Ergonomics & Human Factors 2