Industrial Ergonomics Flashcards
7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Industrial Ergonomics flashcards as text
Which NIOSH equation variable accounts for the horizontal distance of the load from the worker's body?
Answer: Horizontal Multiplier (HM)
The Horizontal Multiplier (HM) in the NIOSH Lifting Equation penalizes lifts where the load is held far from the body, increasing spine loading.
In a push/pull task, which force measurement is most critical for ergonomic evaluation?
Answer: Initial peak force and sustained force
Both the initial peak force (to break inertia) and sustained force (to keep the load moving) must be measured and compared against limits.
What does the term 'anthropometric variability' mean in workstation design?
Answer: Natural range of human body dimensions across a population
Anthropometric variability refers to the natural differences in body dimensions (height, reach, etc.) across a worker population that must be accommodated in design.
A conveyor belt height that is too low for assembly work primarily causes which ergonomic risk?
Answer: Prolonged trunk flexion
A conveyor set too low forces workers to bend forward repeatedly or sustain trunk flexion, increasing lumbar spine loading.
Which industrial scenario BEST illustrates a 'pinch grip' hazard?
Answer: Holding a thin sheet metal blank between thumb and fingers
A pinch grip occurs when thin objects are held between the fingertips and thumb, generating high tendon forces relative to power grip.
What is the primary purpose of a job rotation program in ergonomics?
Answer: Distribute cumulative musculoskeletal loading across different muscle groups
Job rotation spreads repetitive exposures across different muscle groups and body regions, reducing cumulative loading on any single structure.
When evaluating manual assembly work, 'cycle time' is important because shorter cycles typically mean:
Answer: Higher repetition rates that increase cumulative injury risk
Shorter cycle times mean the same motions are repeated more frequently per hour, increasing the repetition rate and cumulative musculoskeletal exposure.