CES Ergonomic Assessment & Analysis 2

Question 1

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

Accepted Answer

23 kg (51 lb)

Answer

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

Question 2

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?

Accepted Answer

1.5; increased risk of lifting-related low back pain

Answer

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

Question 3

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

Accepted Answer

Investigation and changes required immediately

Answer

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

Question 4

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

Accepted Answer

REBA

Answer

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

Question 5

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

Accepted Answer

Weight of the object lifted

Answer

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.

CES - Certified Ergonomic Specialist Practice Test

CES - Certified Ergonomic Specialist Practice Test

CES Ergonomic Assessment & Analysis 2