Ergonomic Assessment & Analysis Flashcards

In the revised NIOSH Lifting Equation, what is the load constant (LC) used to calculate the Recommended Weight Limit?

Answer: 23 kg (51 lb)

The NIOSH load constant is 23 kg (51 lb), the maximum recommended weight under ideal lifting conditions.

A worker lifts a 15 kg box and the calculated RWL for the task is 10 kg. What is the Lifting Index and its interpretation?

Answer: 1.5; increased risk of lifting-related low back pain

LI = load weight / RWL = 15/10 = 1.5, and an LI above 1.0 indicates increased risk for some workers.

A RULA assessment produces a grand score of 7. What action level does this indicate?

Answer: Investigation and changes required immediately

A RULA grand score of 7 is Action Level 4, requiring immediate investigation and change.

Which assessment tool was developed specifically to evaluate whole-body postures in unpredictable tasks such as healthcare patient handling?

Answer: REBA

REBA (Hignett and McAtamney, 2000) evaluates whole-body postural risk and was designed for dynamic, unpredictable tasks like those in healthcare.

Which variable is NOT one of the six task variables used in the Moore-Garg Strain Index?

Answer: Weight of the object lifted

The Strain Index uses intensity of exertion, duration of exertion, efforts per minute, hand/wrist posture, speed of work, and duration per day, not object weight.

In the revised NIOSH Lifting Equation, what is the horizontal multiplier (HM) when the hands are 50 cm from the midpoint between the ankles?

Answer: 0.50

HM = 25/H, so 25/50 = 0.50.

The ACGIH TLV for Hand Activity combines which two factors to assess risk of upper limb disorders?

Answer: Hand Activity Level (HAL) and normalized peak force

The ACGIH Hand Activity TLV plots the 0-10 Hand Activity Level against normalized peak force to compare with the action limit and TLV.