INTERNATIONALGENERALCERTIFICATEINOCCUPATIONALHEALTHAND SAFETY

MOCKPAPERIGC2:CONTROLOF INTERNATIONALWORKPLACEHAZARDS

1. (a) Outline the possible effects on worker's health-when exposed tohigh noise levels. (6)

(b) Outline the factors to be considered when selecting personal hearing protection forworkers. (6)

(c) Describe, with practical examples, noise control techniques that would reduce noise levels in theworkplace. (8)

2. A worker is manually loading boxes of components onto metal racking.

a. Identify FOURtypes of injury that the worker could be at risk from while carrying out thisactivity. (4)

b. Outline the factors in relation to the task that will affect the risk of injury (4)

3. Identify the information that should be included on a material safety data sheet (MSDS)providedwith a hazardous substance. (8)

4. (a) Outline the term 'respirable dust'. (2)

(b) Outline the methods for measuring airborne dust in the workplace. (6)

5. Identify control measures to reduce the risk of accidents from reversing vehicles in theworkplace. (8)

6. Identify control measures to reduce the risk of electric shock when using aportable electric drill. (8)

7. Identify EIGHTsafe working practices that should be considered to reduce the risk when using amobile tower scaffold. (8)

8. (a) Identify TWO types of hazardous substance. (2)

(b) Outline personal hygiene controls to reduce the risk of ingestion of a hazardous substance. (6)

9. Outline the factors to be considered for the successful evacuation of persons from aworkplace in theevent of fire. (8)

10. A maintenance worker regularly usesa hand held grinder, and is exposed to vibration.

(a) Identify the symptoms that the worker may experience due to thisexposure. (2)

(b) Outline SIXcontrol measures that can be used to reduce the riskfrom vibration. (6)

11. (a) Identify FOURhazards associated with the use of battery-poweredfork lift trucks. (4)

\0 )() Outline the control measures for EACHof the hazards identified in (a). (4)

INTERNATIONALGENERALCERTIFICATEINOCCUPATIONALHEALTHAND SAFETY

MOCK PAPERIGC2:CONTROLOF INTERNATIONALWORKPLACEHAZARDS

1. (a) Outline the possible effects on worker's health when exposed tohigh noise levels. (6)

(b) Outline the factors to be considered when selecting personal hearing protection forworkers. (6)

(c) Describe, with practical examples, noise control techniques that would reduce noise levels in theworkplace. (8)

2. A worker is manually loading boxes of components onto metal racking.

a. Identify FOURtypes of injury that the worker could be at risk from while carrying out thisactivity. (4)

b. Outline the factors in relation to the task that will affect the risk of injury (4)

3. Identify the information that should be included on a material safety data sheet (MSDS) providedwith a hazardous substance. (8)

4. (a) Outline the term 'respirable dust'. (2)

(b) Outline the methods for measuring airborne dust in the workplace. (6)

5. Identify control measures to reduce the risk of accidents from reversing vehicles in theworkplace. (8)

6. Identify control measures to reduce the risk of electric shock when using aportable electric drill. (8)

7. Identify EIGHTsafe working practices that should be considered to reduce the risk when using amobile tower scaffold. (8)

8. (a) Identify TWO types of hazardous substance. (2)

(b) Outline personal hygiene controls to reduce the risk of ingestion of a hazardous substance. (6)

9. Outline the factors to be considered for the successful evacuation of persons from aworkplace in theevent of fire. (8)

10. A maintenance worker regularly usesa hand held grinder, and is exposed to vibration.

(a) Identify the symptoms that the worker may experience due to thisexposure. (2)

(b) Outline SIXcontrol measures that can be used to reduce the riskfrom vibration. (6)

11. (a) Identify FOURhazards associated with the use of battery-poweredfork lift trucks. (4)

b :~Outline the control measures for EACHof the hazards identified in (a). (4)

INTERNATIONALGENERALCERTIFICATEINOCCUPATIONALHEALTHAND SAFETY

MOCK PAPERIGC2:CONTROLOF INTERNATIONALWORKPLACEHAZARDS

1. (a) Outline the possible effects on worker's health when exposed tohigh noise levels. (6)

Model Answer: 1mark each

Acute• Temporary threshold shift• Temporary tinnitus or ringing in the ears• Trauma, e.g. blast deafness• Stress / fatigue / headaches

Chronic• Noise induced hearing loss / permanent threshold shift• Damage to hairs in the cochlea / reduced hearing capability at certain frequencies• Permanent tinnitus or ringing in the ears

(b) Outline the factors to be considered when selecting personal hearing protection forworkers. (6)

Model Answer:• Noise level/exposure time or noise dose• Frequency of noise (octave band analysis)• Ear p~oblems• Training in use• Compatibility with other PPE worn• Comfort• Manufacturers attenuation data / standards• Cost / Availablity

(c) Describe, with practical examples, noise control techniques that would reduce noise levels in theworkplace. (8)

Model Answer: 2 marks each• Process change, e.g. bolts rather than rivets• Isolation if sound / sound proof enclosure• Noise insulation, e.g. partitions• Absorption in foam / surface coatings• Vibration isolation / machinery mounts, flexible pipes• Damping / stiffening of panels• Silencing of exhausts

2. A worker is manually loading boxes of components onto metal racking.

a. Identify FOURtypes of injury that the worker could be at risk from while carrying out thisactivity. (4)

Model Answer:• Prolapsed or slipped or compressed disc• Torn ligaments / sprained tendons• Hernia• Muscle strain• Cuts• Abrasion• Fracture

• Bruises

*No marks for "back pain" or "musculoskeletal injury"

b. Outline the factors in relation to the task that will affect the risk of injury (4)

Model Answer:• Frequency of the activity• Distance reached• Distance load held away from body• Twisting I stooping movements• Height lifted• Distance carried

3. Identify the information that should be included on a material safety data sheet (MSDS)providedwith a hazardous substance. (8)

Model Answer:• Substance Ipreparation identification I supplier• Composition I propriety name• Hazard identification• First Aid measures• Fire-fighting measures• Accidental release I spillage• Handling & Storage• Exposure controls IPPE

Physical and Chemical Properties (any example)• Stability and reactivity• Toxicological data• Ecological data• Disposal data I environmental considerations• Transport data• Regulatory requirements I information, e.g. Risk and safety phrases I OEL

4. (a) Outline the term 'respirable dust'. (2)

Model Answer:Atmospheric dust of particle size (0.5 to 7 microns) that enters lower lungs during respiration.

(b) Outline the methods for measuring airborne dust in the workplace. (6)

Model Answer:• Dust lamp I dust deposits• Collection offilter (preweighed) by active sampling (pump)• Total dust - use total dust sampler• Respirable dust - use cyclone• Personal or static (fixed) sampling• Pre set flow rate of pump• Measure time of sampling

o Indirect measurement I analysis:• By weight• By microscopy for asbestos (fibre count)

• Direct reading instrument

5. Identify control measures to reduce the risk of accidents from reversing vehicles in theworkplace. (8)

Model Answer:• Avoid need to reverse / 1way systems / turning circles• Segregation of pedestrians e.g. barriers / warning signs and markings• Audible vehicle alarm• Mirrors on vehicles• Mirrors at blind corners• Refuges• Workplace lighting• Wear Hi-Viz jackets• CCTVin cab• Prohibit unauthorised persons• Use of banks man• Site rules• Driver training

6. Identify control measures to reduce the risk of electric shock when using aportable electric drill. (8)

Model Answer:• Cover / protect / re-route cable• Armour cable• Use RCD• Use double insulated drill• IIDV drill with centre tapped to earth transformers (CTE)• Minimise length of cable / extensions / suitable outlets• Cordless / battery drill• Suitable drill for environment, e.g. air drill for flammable vapours• PAT (testing)• Visual inspection / user checks• Fuse rating correct

7. Identify EIGHTsafe working practices that should be considered to reduce the risk when using amobile tower scaffold. (8)

Model Answer:• Erected by competent persons• Used within SWL / not overload• Praperly braced / no defective components• Use of edge protection - guard rails and toe boards• Use of outriggers• Height to least base ration (use within)• No moving the tower with people or materials on it• Erect on firm, level ground• Avoid overhead obstacles• Wheels locked when in use• Tied of side loading• Cordon off work area

8. (a) Identify TWO types of hazardous substance. (2)

Model Answer:Any hazardous substance, e.g. carbon dioxide, carbon monoxide, silica, asbestos, etc.

(NOT BIOLOGICAL HAZARDS!)

(b) Outline personal hygiene controls to reduce the risk of ingestion of a hazardous substance. (6)

Model Answer:• Personal cleanliness, e.g. wash hands

No smoking at work

• No eating / drinking at work• Use PPE, e.g. gloves• Wash soiled clothes (laundry)• Change work clothes and shower• Avoid hands to mouth contact, e.g. do not bite fingernails

9. Outline the factors to be considered for the successful evacuation of persons from aworkplace in theevent of fire. (8)

Model Answer:• Fire detection (smoke / heat), break glasses & fire alarm• Fire protected resistant escape route• Alternative fire escape routes• Unobstructed escape route / exit doors not locked• Width of exits• Number of exits• Travel distances• Emergency lighting• Escape / fire exit signage• Provision of fire doors / closed to prevent fire spread• Safe assembly point• Fire marshals, assist disabled• Fire drills/ practice• Roll call• Provision of fire-fighting equipment

10. A maintenance worker regularly usesa hand held grinder, and is exposed to vibration.

(a) Identify the symptoms that the worker may experience due to thisexposure. (2)

Model Answer:• Numbness / tingling• Blanching of fingers (white fingers)• Swollen / painful joints• Reduced strength / grip• Reduced sense of touch / feeling• Reduced dexterity

(b) Outline SIXcontrol measures that can be used to reduce the riskfrom vibration. (6)

Model Answer:• Substitute with lower vibration tools• Reduce exposure time / frequent breaks / job rotation• Health surveillance• Planned maintenance• Improve tool grip / fit anti-vibrate grip• Avoid cold temperature / space constraints• Anti-vibration gloves / gloves to keep hands warm• Training / health promotion• Keep operators warm and dry• Stop smoking / exercise fingers during breaks

11. (a) Identify FOURhazards associated with the use of battery-powered fork lift trucks. (4)

Model Answer:1. Battery charging - hydrogen2. Battery short circuit / overcharging - explosion

3. Battery acid exposure - acid burns4. Handling of batteries - manual handling injuries5. Collision with people / silent running - injury

to ')(J Outline the control measures for EACH of the hazards identified in (a).

Model Answer:1. Adequate ventilation / avoid ignition sources2. Insulation / connection procedure / over charge protection3. PPE,e.g. gloves faceshield apron4. Use mechanical aids5. Drivers to sound horn when approaching people / segregation of pedestrian and vehicle

routes

(4)