Industrial Ergonomics Test 2 Review(100% Correct Answers)
(1) Definition of Ergonomics and what word means - (answer)-Ergonomics is the process of designing or
evaluating products, tasks, environments, and systems to improve performance and/or reduce the risk
of injury.
- Remember 2-4-2
- "Ergon" Greek for Work
- "Nomos Greek for Law
(1) Why do we care about Ergonomics? - (answer)1. Poor Performance
2. Injuries
3. Cost
(1) 3 General Areas of Ergonomics - (answer)1. Physical
2. Cognitive
3. Organizational
(1) Types of Physical Ergonomics Problems - (answer)-Anthropometric: concern dimensional conflicts
between functional space geometry and the human body
-Musculoskeletal: concern forces, moments, postures, and mechanical stress on muscles and skeletal
system
-Metabolic/Cardiovascular: concern stress on metabolic energy and cardiovascular system (inc
heart/breathing rate)
-Environmental: concern exposure to excessive environmental stress (heat, vibration, etc.)
(1) ERGONOMICS PROCESS - (answer)1. Characterize existing or potential problems
, Industrial Ergonomics Test 2 Review(100% Correct Answers)
2. Perform job analysis
3. Implement controls
4. Evaluate effectiveness of controls and educate employees on ergonomics
(1) Guiding Principle of Ergonomics - (answer)Maintain D<C
D = task DEMAND
C = human CAPACITY
(1) Why is it important to be aware of tissues and their mechanical properties? - (answer)They allow us
to evaluate if "D<C" at tissue level
Knowing these mech. properties of these various tissues is somewhat limited in determing the risk of
injury
(1) Viscoelasticity - (answer)A material's response to sterss or strain depends not only on the applied
stress or strain, but also on time
(1) Creep - (answer)Increase in strain for a constant stress
(1) Stress Relaxation - (answer)Decrease in stress for a constant strain
(1) Why does viscoelasticity have a HUGE relevance to ergonomics and potential injuries? -
(answer)Repeated loads or movements can accumulate over time to have larger effects than just one
rep
(1) Why do we care about force-length relationship? - (answer)Because it tells us the max force a muscle
can produce depends on posture
(1) Why do we care about force-velocity relationship? - (answer)Because it tell us the max amount of
force a muscle can produce depends upon how quickly you do the task
(1) Definition of Ergonomics and what word means - (answer)-Ergonomics is the process of designing or
evaluating products, tasks, environments, and systems to improve performance and/or reduce the risk
of injury.
- Remember 2-4-2
- "Ergon" Greek for Work
- "Nomos Greek for Law
(1) Why do we care about Ergonomics? - (answer)1. Poor Performance
2. Injuries
3. Cost
(1) 3 General Areas of Ergonomics - (answer)1. Physical
2. Cognitive
3. Organizational
(1) Types of Physical Ergonomics Problems - (answer)-Anthropometric: concern dimensional conflicts
between functional space geometry and the human body
-Musculoskeletal: concern forces, moments, postures, and mechanical stress on muscles and skeletal
system
-Metabolic/Cardiovascular: concern stress on metabolic energy and cardiovascular system (inc
heart/breathing rate)
-Environmental: concern exposure to excessive environmental stress (heat, vibration, etc.)
(1) ERGONOMICS PROCESS - (answer)1. Characterize existing or potential problems
, Industrial Ergonomics Test 2 Review(100% Correct Answers)
2. Perform job analysis
3. Implement controls
4. Evaluate effectiveness of controls and educate employees on ergonomics
(1) Guiding Principle of Ergonomics - (answer)Maintain D<C
D = task DEMAND
C = human CAPACITY
(1) Why is it important to be aware of tissues and their mechanical properties? - (answer)They allow us
to evaluate if "D<C" at tissue level
Knowing these mech. properties of these various tissues is somewhat limited in determing the risk of
injury
(1) Viscoelasticity - (answer)A material's response to sterss or strain depends not only on the applied
stress or strain, but also on time
(1) Creep - (answer)Increase in strain for a constant stress
(1) Stress Relaxation - (answer)Decrease in stress for a constant strain
(1) Why does viscoelasticity have a HUGE relevance to ergonomics and potential injuries? -
(answer)Repeated loads or movements can accumulate over time to have larger effects than just one
rep
(1) Why do we care about force-length relationship? - (answer)Because it tells us the max force a muscle
can produce depends on posture
(1) Why do we care about force-velocity relationship? - (answer)Because it tell us the max amount of
force a muscle can produce depends upon how quickly you do the task
