Page 1 of 33
IICRC HST Exam Study Guide NEWEST QUESTIONS
AND VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
IICRC HST Exam Study Guide
When investigating an accident, often the most overlooked thing is
evaluating the scene closely before trying to take care of an injured worker
Process of Accident Investigation:
Evaluate Scene
Take care of injured worker(s)
Report accident
Preserve evidence
Record evidence/take photos
Gather facts
Interview
Gather physical evidence
Written report
Recommendations
Follow up
Examples of Physical Evidence:
Positions of injured workers
Equipment
Materials
Safety devices
Position of guards and controls
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, Page 2 of 33
Damage to equipment
Housekeeping
Weather, lighting and noise conditions
Sketches and photos
Job Hazard Analysis (JHA)
Beginning of safety inspection process. The procedure used to make a job safe by identifying
hazards in each step of the job and developing measures to counteract those hazards. (First
step in 2-step program that culminates in JSA)
WATCHING FOR:
People Hazards
Equip Hazards
Material Hazards
Enviro Hazards
Process Hazards
5 steps of Job Hazard Analysis (JHA)
1. Select the job being analyzed
2. Break the job down into a sequence of tasks
3. Identifying of potential hazards in each task
4. Determining preventative measures to control these hazards
5. Communicating the information to others
Benefits of Job Hazard Analysis (JHA)
2
, Page 3 of 33
does not rely on individuals memory
process prompts recognition of hazards
More people involved, allows for wider base of experience and acceptance of the procedure
May identify previously undetected hazards and increase job knowledge
Safety and health awareness raised, communication improved, acceptance of safe work
procedures is promoted
How are potential hazards identified?
two common techniques:
Kepner and Tregoe method - based on "Change Analysis"
Gibson and Haddon approach - based on unwanted energy flow/barrier (Energy-barrier
Approach)
Change Analysis
An analysis that projects the effects a given system change is likely to have on an existing
system. Not done at a fixed workstation. Possibility of things changing is substantial.
Parameters for Change Analysis
A sensory signal: color, shape of object, emitted sound, odor, light level, position of handle,
height of pedal
A process specification: pressure, temperature, concentration, flow rate
A dynamic component: motion, sequence, pace, speed change, friction
A force or mass: electrical power, chemical energy, torque, impulse, impact
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, Page 4 of 33
A geometric value and time: location, dimensions, rate
A piece of equipment: protective devices, position of a part, part in motion
Environmental condition: weather, snow, rain, nuisance
Energy Barrier Approach
hazard is defined as uncontrolled energy flow and its possible contact with people and
equipment.
Ex.
Electrical
- Thermal
- Moving belts and breaking belts
- Kinetic motions
- human and machine
- Biological/chemical
- Radiation
- Noise
- Stored energy
Industrial Hygiene
Science and art devoted to the anticipation, recognition, evaluation, prevention, and control of
those environmental factors or stresses arising in or from the workplace which may cause
sickness,, impaired health and well being, or significant discomfort among workers or among
citizens of the community.
Occupational Health and Safety
Same definition as "industrial hygiene" ;
Science and art devoted to the anticipation, recognition, evaluation, prevention, and control of
those environmental factors or stresses arising in or from the workplace which may cause
4
IICRC HST Exam Study Guide NEWEST QUESTIONS
AND VERIFIED SOLUTIONS LATEST UPDATE THIS
YEAR
IICRC HST Exam Study Guide
When investigating an accident, often the most overlooked thing is
evaluating the scene closely before trying to take care of an injured worker
Process of Accident Investigation:
Evaluate Scene
Take care of injured worker(s)
Report accident
Preserve evidence
Record evidence/take photos
Gather facts
Interview
Gather physical evidence
Written report
Recommendations
Follow up
Examples of Physical Evidence:
Positions of injured workers
Equipment
Materials
Safety devices
Position of guards and controls
1
, Page 2 of 33
Damage to equipment
Housekeeping
Weather, lighting and noise conditions
Sketches and photos
Job Hazard Analysis (JHA)
Beginning of safety inspection process. The procedure used to make a job safe by identifying
hazards in each step of the job and developing measures to counteract those hazards. (First
step in 2-step program that culminates in JSA)
WATCHING FOR:
People Hazards
Equip Hazards
Material Hazards
Enviro Hazards
Process Hazards
5 steps of Job Hazard Analysis (JHA)
1. Select the job being analyzed
2. Break the job down into a sequence of tasks
3. Identifying of potential hazards in each task
4. Determining preventative measures to control these hazards
5. Communicating the information to others
Benefits of Job Hazard Analysis (JHA)
2
, Page 3 of 33
does not rely on individuals memory
process prompts recognition of hazards
More people involved, allows for wider base of experience and acceptance of the procedure
May identify previously undetected hazards and increase job knowledge
Safety and health awareness raised, communication improved, acceptance of safe work
procedures is promoted
How are potential hazards identified?
two common techniques:
Kepner and Tregoe method - based on "Change Analysis"
Gibson and Haddon approach - based on unwanted energy flow/barrier (Energy-barrier
Approach)
Change Analysis
An analysis that projects the effects a given system change is likely to have on an existing
system. Not done at a fixed workstation. Possibility of things changing is substantial.
Parameters for Change Analysis
A sensory signal: color, shape of object, emitted sound, odor, light level, position of handle,
height of pedal
A process specification: pressure, temperature, concentration, flow rate
A dynamic component: motion, sequence, pace, speed change, friction
A force or mass: electrical power, chemical energy, torque, impulse, impact
3
, Page 4 of 33
A geometric value and time: location, dimensions, rate
A piece of equipment: protective devices, position of a part, part in motion
Environmental condition: weather, snow, rain, nuisance
Energy Barrier Approach
hazard is defined as uncontrolled energy flow and its possible contact with people and
equipment.
Ex.
Electrical
- Thermal
- Moving belts and breaking belts
- Kinetic motions
- human and machine
- Biological/chemical
- Radiation
- Noise
- Stored energy
Industrial Hygiene
Science and art devoted to the anticipation, recognition, evaluation, prevention, and control of
those environmental factors or stresses arising in or from the workplace which may cause
sickness,, impaired health and well being, or significant discomfort among workers or among
citizens of the community.
Occupational Health and Safety
Same definition as "industrial hygiene" ;
Science and art devoted to the anticipation, recognition, evaluation, prevention, and control of
those environmental factors or stresses arising in or from the workplace which may cause
4
