Industrial and Product Design Ergonomics & Human Factors 3

Question 1

What is the primary purpose of a task analysis in human factors engineering?

Accepted Answer

To systematically identify the steps, decisions, and demands involved in completing a task

Answer

Task analysis breaks a task into its component steps, decisions, and information needs, revealing design opportunities and potential human error points.

Question 2

Which of the following describes a 'population stereotype' in control design?

Accepted Answer

A widely shared expectation about the direction a control should move for a given effect

Answer

Population stereotypes are learned, culturally consistent expectations—such as turning a knob clockwise to increase a value—that designers must respect to avoid errors.

Question 3

The NIOSH Lifting Equation calculates a Recommended Weight Limit (RWL) by applying multipliers for which set of factors?

Accepted Answer

Horizontal distance, vertical height, asymmetry, frequency, coupling, and vertical travel

Answer

The NIOSH equation applies six task multipliers—horizontal location, vertical location, vertical travel, asymmetry angle, lift frequency, and hand-container coupling—to a 51 lb load constant.

Question 4

In signal detection theory, a 'false alarm' occurs when:

Accepted Answer

The operator responds to a signal that was not actually present

Answer

A false alarm (false positive) is when an operator reports detecting a signal that did not occur, reflecting a bias toward responding under uncertainty.

Question 5

Which lighting metric is most relevant when designing task lighting for detailed inspection work?

Accepted Answer

Color rendering index (CRI)

Answer

CRI measures how accurately a light source renders colors compared to natural light, which is critical for detecting surface defects, color variations, or fine detail in inspection tasks.

Industrial and Product Design Practice Test

Industrial and Product Design Practice Test

Industrial and Product Design Ergonomics & Human Factors 3