IDRL 308 QUESTIONS AND ANSWERS 100% CORRECT.
HRAC - (answer)Hazard recognition, hazard assessment and hazard control
Hazard Recognition - (answer)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 - (answer)Workers and employers which of the hazards needs to be addressed most
urgently.
Hazard Control - (answer)The process used to establish preventative and corrective measures
implemented to eliminate or mitigate the effect of the hazard.
Hierarchy of Controls - (answer)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 - (answer)1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination - (answer)Removes the hazard from the worksite
Substitution - (answer)Replaces something that produces a hazard with something that does not.
Engineering Controls - (answer)Modifications to the workplace, equipment, materials or work processes
that reduces workers exposure to hazards.
Administrative Controls - (answer)Changes to work process, policies, training or rules designed to reduce
exposure to hazards.
, IDRL 308 QUESTIONS AND ANSWERS 100% CORRECT.
Personal Protective Equipment (PPE) - (answer)Equipment worn by workers designed to protect them if
they come in contact with hazard.
Physical Hazards - (answer)Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers? - (answer)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? - (answer)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 - (answer)When a workers entire body experiences shaking due to vibration. Can
lead to lower spine damage or even internal organ damage.
Segmental Vibration - (answer)When only parts of the body are affected by vibration. Most common
and concerning form is hand-arm vibration.
When does temperature become a hazard? - (answer)When temperature extremes prevent our bodies
from properly self regulating we experience thermal stress. Temperatures that are too high can cause
heat stroke and temperatures that are too low can cause hypothermia.
Radiation - (answer)Any energy emitted from a source including heat, light, x-rays, microwaves and
more. It is categorized in two forms: ionizing and non-ionizing.
Ionizing Radiation - (answer)Radiation with enough strength to remove electrons from a molecule as it
passes through. The electron loss causes the molecule to become positively charged (ion) Ex/ X-rays,
gamma rays.
Non-ionizing Radiation - (answer)Does not ionize molecules but can have other affects. Ex/ microwaves,
ultraviolet, radio waves.
HRAC - (answer)Hazard recognition, hazard assessment and hazard control
Hazard Recognition - (answer)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 - (answer)Workers and employers which of the hazards needs to be addressed most
urgently.
Hazard Control - (answer)The process used to establish preventative and corrective measures
implemented to eliminate or mitigate the effect of the hazard.
Hierarchy of Controls - (answer)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 - (answer)1. Elimination
2. Substitution
3. Engineering Controls
4. Administrative Controls
5. Personal Protective Equipment (PPE)
Elimination - (answer)Removes the hazard from the worksite
Substitution - (answer)Replaces something that produces a hazard with something that does not.
Engineering Controls - (answer)Modifications to the workplace, equipment, materials or work processes
that reduces workers exposure to hazards.
Administrative Controls - (answer)Changes to work process, policies, training or rules designed to reduce
exposure to hazards.
, IDRL 308 QUESTIONS AND ANSWERS 100% CORRECT.
Personal Protective Equipment (PPE) - (answer)Equipment worn by workers designed to protect them if
they come in contact with hazard.
Physical Hazards - (answer)Noise and vibration, temperature, radiation and ergonomics.
When is noise harmful to workers? - (answer)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? - (answer)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 - (answer)When a workers entire body experiences shaking due to vibration. Can
lead to lower spine damage or even internal organ damage.
Segmental Vibration - (answer)When only parts of the body are affected by vibration. Most common
and concerning form is hand-arm vibration.
When does temperature become a hazard? - (answer)When temperature extremes prevent our bodies
from properly self regulating we experience thermal stress. Temperatures that are too high can cause
heat stroke and temperatures that are too low can cause hypothermia.
Radiation - (answer)Any energy emitted from a source including heat, light, x-rays, microwaves and
more. It is categorized in two forms: ionizing and non-ionizing.
Ionizing Radiation - (answer)Radiation with enough strength to remove electrons from a molecule as it
passes through. The electron loss causes the molecule to become positively charged (ion) Ex/ X-rays,
gamma rays.
Non-ionizing Radiation - (answer)Does not ionize molecules but can have other affects. Ex/ microwaves,
ultraviolet, radio waves.
