IDRL 308 Study Guide Exam
Questions and Answers9
HRAC - ANSWERS-Hazard recognition, hazard assessment and hazard control
Hazard Recognition - ANSWERS-The systematic task of identifying all hazards present or
potentially present in a workplace. It's always the first step of any HRAC process.
Hazard Assessment - ANSWERS-Workers and employers which of the hazards needs to be
addressed most urgently.
Hazard Control - ANSWERS-The process used to establish preventative and corrective measures
implemented to eliminate or mitigate the effect of the hazard.
Hierarchy of Controls - ANSWERS-A system used to control workplace risks. It's a step by step
approach to eliminating or reducing risks ranking from most effective to least.
Five Controls in Hierarchy of Controls - ANSWERS-1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination - ANSWERS-Removes the hazard from the worksite
, Substitution - ANSWERS-Replaces something that produces a hazard with something that does
not.
Engineering Controls - ANSWERS-Modifications to the workplace, equipment, materials or work
processes that reduces workers exposure to hazards.
Administrative Controls - ANSWERS-Changes to work process, policies, training or rules
designed to reduce exposure to hazards.
Personal Protective Equipment (PPE) - ANSWERS-Equipment worn by workers designed to
protect them if they come in contact with hazard.
Physical Hazards - ANSWERS-Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers? - ANSWERS-Three characteristics affect when noise becomes
a hazard: frequency, duration and loudness. Noise can lead to permanent hearing loss.
When does vibration become harmful to workers? - ANSWERS-When a worker comes into
contact with vibration causing energy to be transferred to the worker. There are two common
types of vibration that are important to
OHS: whole body vibration and segmental vibration.
Whole Body Vibration - ANSWERS-When a workers entire body experiences shaking due to
vibration. Can lead to lower spine damage or even internal organ damage.
Segmental Vibration - ANSWERS-When only parts of the body are affected by vibration. Most
common and concerning form is hand-arm vibration.
Questions and Answers9
HRAC - ANSWERS-Hazard recognition, hazard assessment and hazard control
Hazard Recognition - ANSWERS-The systematic task of identifying all hazards present or
potentially present in a workplace. It's always the first step of any HRAC process.
Hazard Assessment - ANSWERS-Workers and employers which of the hazards needs to be
addressed most urgently.
Hazard Control - ANSWERS-The process used to establish preventative and corrective measures
implemented to eliminate or mitigate the effect of the hazard.
Hierarchy of Controls - ANSWERS-A system used to control workplace risks. It's a step by step
approach to eliminating or reducing risks ranking from most effective to least.
Five Controls in Hierarchy of Controls - ANSWERS-1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination - ANSWERS-Removes the hazard from the worksite
, Substitution - ANSWERS-Replaces something that produces a hazard with something that does
not.
Engineering Controls - ANSWERS-Modifications to the workplace, equipment, materials or work
processes that reduces workers exposure to hazards.
Administrative Controls - ANSWERS-Changes to work process, policies, training or rules
designed to reduce exposure to hazards.
Personal Protective Equipment (PPE) - ANSWERS-Equipment worn by workers designed to
protect them if they come in contact with hazard.
Physical Hazards - ANSWERS-Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers? - ANSWERS-Three characteristics affect when noise becomes
a hazard: frequency, duration and loudness. Noise can lead to permanent hearing loss.
When does vibration become harmful to workers? - ANSWERS-When a worker comes into
contact with vibration causing energy to be transferred to the worker. There are two common
types of vibration that are important to
OHS: whole body vibration and segmental vibration.
Whole Body Vibration - ANSWERS-When a workers entire body experiences shaking due to
vibration. Can lead to lower spine damage or even internal organ damage.
Segmental Vibration - ANSWERS-When only parts of the body are affected by vibration. Most
common and concerning form is hand-arm vibration.
