IDRL 308 Exam Questions with Verified
Correct Answers
HRAC
Hazard recognition, hazard assessment and hazard control
Hazard Recognition
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
Workers and employers which of the hazards needs to be addressed most urgently.
Hazard Control
The process used to establish preventative and corrective measures implemented to eliminate
or mitigate the effect of the hazard.
Hierarchy of Controls
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
1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination
, Removes the hazard from the worksite
Substitution
Replaces something that produces a hazard with something that does not.
Engineering Controls
Modifications to the workplace, equipment, materials or work processes that reduces workers
exposure to hazards.
Administrative Controls
Changes to work process, policies, training or rules designed to reduce exposure to hazards.
Personal Protective Equipment (PPE)
Equipment worn by workers designed to protect them if they come in contact with hazard.
Physical Hazards
Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers?
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?
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
Correct Answers
HRAC
Hazard recognition, hazard assessment and hazard control
Hazard Recognition
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
Workers and employers which of the hazards needs to be addressed most urgently.
Hazard Control
The process used to establish preventative and corrective measures implemented to eliminate
or mitigate the effect of the hazard.
Hierarchy of Controls
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
1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination
, Removes the hazard from the worksite
Substitution
Replaces something that produces a hazard with something that does not.
Engineering Controls
Modifications to the workplace, equipment, materials or work processes that reduces workers
exposure to hazards.
Administrative Controls
Changes to work process, policies, training or rules designed to reduce exposure to hazards.
Personal Protective Equipment (PPE)
Equipment worn by workers designed to protect them if they come in contact with hazard.
Physical Hazards
Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers?
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?
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
