IE 424 Practice Exam Quiz 3 Part 1

What is the Body Mass Index (BMI) of a person who is 5'5" in height and weighs 150 lbs, as calculated using the metric system?

Which type of connective tissue serves as strong elongations of muscles, connecting them to bones?

Approximately how many skeletal muscles are in the human body?

Given that the combined mass of the torso and head for a female at the 75th percentile has a mean of 35.8 kg and a standard deviation of 5.2 kg, with a correlation of 0.1 to the head mass, and the head mass alone has a mean of 5.8 kg and a standard deviation of 1.2 kg, estimate the mass of the torso at the 75th percentile, using a 75th percentile factor of 0.67.

Calculate the 95th percentile shoulder-to-fingertip length, given that the mean lower arm link length (including the hand) is 443 mm with a standard deviation of 23 mm, the mean upper arm link length is 336 mm with a standard deviation of 17 mm, the standard deviation of the sum is 33.6 mm, and the percentile factor is 1.64.

A 45-year-old male worker weighs 170 lbs. He sleeps for 8 hours and expends 2.7 kcal/min for 8 hours of work. Determine his basal metabolic rate (BMR) for 24 hours.

In reference to the previous question, if the male worker's total energy expenditure is 4,000 kcal/day, determine his average energy expenditure for the remaining 8 hours of the day.

What temperature range defines the 'comfort zone'?

A male worker works for 50 minutes, expending 4.0 kcal/min for 35% of the time and 5.7 kcal/min for the remaining portion. If he burns 1.5 kcal/min while resting, determine the amount of rest needed to overcome fatigue.

Michelle is 20 years old, weighs 180 lbs, works for 8 hours and burns approximately 3.5 kcal/min, rests for 90 minutes burning 2.1 kcal/min, and sleeps for 11 hours. Determine her daily basal metabolic rate.

What is the visual angle subtended by a small object that is 25 mm high at a distance of 30 m?

In reference to the previous question, determine the visual acuity of the individual.

What is the amount of information (in bits) in a set of 7 signals with varying probabilities of occurrence, given the probabilities: 0.04, 0.12, 0.18, 0.24, 0.20, 0.22, and 0.08?

Based on the previous question, calculate the redundancy of this configuration.

What is the illumination on a surface 8 inches away from a 3-candela source?

What is a reasonable target heart rate at the maximum time-weighted average during a shift for a female worker?

What is the combined noise level of two sounds measuring 92 decibels and 94 decibels?

What is the luminance of a surface with 70% reflectance under 3-foot candles of illumination?

Given a load weight of 30 lbs, vertical distance of 10 in, horizontal distance of 10 in, a distance multiplier of 0.890, an asymmetric multiplier of 0.712, a frequency multiplier of 1, and a coupling multiplier of 0.95, determine the recommended weight limit (RWL).

In reference to the previous question, calculate the lifting index (LI).

Based on the calculations from the previous questions, what conclusion can be drawn about the safety of the lift?

Which anthropometric measurement is most relevant when determining the maximum height of overhead controls in a workstation design?

A company designs a computer workstation using the 90th percentile of eye height to ensure comfortable monitor viewing. Which group of workers will this design choice likely impact most?

An ergonomic consultant designs a new kitchen counter height using the 50th percentile of elbow height to accommodate most users. What is a potential issue with this design choice?

A new office desk is designed to accommodate workers of all sizes, using the 10th percentile for leg clearance and the 90th percentile for desk height. What is a potential problem with this design approach?

When designing a workstation's desk height, which anthropometric measurement is most important to consider?

Based on an all-day noise study at Dorben Co., the following noise levels were recorded: 0.5 hrs at 100 dBA, 1 hr less than 80 dBA, 3.5 hrs at 90 dBA, and 4 hrs at 92 dBA. What is the dose exposure?

Nome, an engineer, works at 4.3 kcal/min for 50 minutes for a big construction firm. Her expenditure rate during rest breaks is 0.95 kcal/min. Estimate the appropriate rest break.

Prof. Lugi Na Tayo is working at 8.9 kcal/min. How much rest does he need during an 8-hr shift?

Kerina Landipa performs a job during the five hours of her morning that has an energy expenditure rate of 7.50 kcal/min. Determine how much of this five-hour period should be allotted for her work time.

Determine the contrast created by the printed words (reflectance = 10%) on acrylic paper (reflectance = 90%).

Which percentile should clearance dimensions be designed for, according to anthropometric principles?

A supervisor is sitting at her desk illuminated by a 180-candela source 3 feet above it. She is writing with green ink (30% reflectance) on a yellow notepad (60% reflectance). What is the luminance of the notepad?

A worker is exposed to two noise sources: one at 89 dBA and another at 91 dBA. Determine the permissible duration of exposure for this combined sound pressure level.

Consider the English alphabet. If each letter is equally likely to occur, what is the amount of information conveyed?

Which color is regarded as a low-visibility color and imparts a feeling of restfulness, coolness, and stability?

Which anthropometric measurement is the most critical when ensuring that a chair allows a user to comfortably rest their feet on the floor while sitting?

What is the possible static strength difference between the strongest and the weakest workers?

What is the effective visual surface area (in square inches) of an average employee, whose workstation was centered 28 inches from the center point between the eyes?

A person with normal vision has a visual acuity of 1.0. What is the smallest feature that can be distinguished by this person at a distance of 300m?

All the following are elements included in the triangle of fire except:

A burning house is categorized as what class of fire?