BSIE Ergonomics & Human Factors Engineering 2

Question 1

What is the purpose of a time-and-motion study in industrial engineering?

Accepted Answer

To determine standard times for tasks by observing and timing work elements

Answer

To evaluate worker satisfaction

Answer

To schedule machine maintenance intervals

Answer

To calculate overtime pay rates

Question 2

In human reliability analysis, what does a Human Error Probability (HEP) of 0.01 mean?

Accepted Answer

There is a 1% probability of human error on a given task

Answer

1% of tasks are completed correctly

Answer

There are 1 error per 100 workers

Answer

1% of errors are detectable

Question 3

Which principle of motion economy suggests that both hands should begin and end their motions simultaneously?

Accepted Answer

Principle of simultaneous hand motions

Answer

Principle of symmetry

Answer

Principle of minimum fixations

Answer

Principle of continuous curved motion

Question 4

What is 'vigilance decrement' in human factors engineering?

Accepted Answer

The decline in detection performance during prolonged signal-detection tasks

Answer

The tendency to increase alertness over time on a monitoring task

Answer

The increase in error rate due to physical fatigue

Answer

The reduction in workstation lighting over a shift

Question 5

Which body posture is most associated with lower back disorder risk on the job?

Accepted Answer

Sustained forward trunk flexion combined with twisting

Answer

Standing with arms at sides

Answer

Seated with upright spine and feet flat

Answer

Walking on level surfaces

Question 6

In display design for control rooms, what does the 'primary zone' of a visual display refer to?

Accepted Answer

The central field of view typically within ±15° from line of sight

Answer

The area where emergency alarms are placed

Answer

The zone reserved for digital readouts only

Answer

The area accessible without moving the head