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10 Cards in this Set
- Front
- Back
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Excessive dust levels have been discovered in a workplace, the principal cause being the inefficient local exhaust ventilation system (LEV).
(i) Identify FOUR indications that could have highlighted the LEV systems’ inefficiency. (4) |
• Deposits of dust on surfaces and people
• Visible particles in the air • Discomfort and irritation by employees • Air monitoring reviews • Actual ill-health in employees due to exposure to dusts |
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Excessive dust levels have been discovered in a workplace, the principal cause being the inefficient local exhaust ventilation system (LEV).
(ii) Outline the factors which could have reduced the LEV systems effectiveness (8) |
• Poor design
• Lack of planned testing • Lack of maintenance • Extraction hood too far from dust source • Damaged or blocked ducting or filters • System alterations – unauthorized • Settings incorrect • Faulty fan • Process changes that could lead to greater dust emissions. |
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Excessive dust levels have been discovered in a workplace, the principal cause being the inefficient local exhaust ventilation system (LEV).
(iii) Describe other methods of control to minimise levels of airborne dust except from LEV. (8) |
• Hierarchy of control
• Eliminating the process causing the dust • A change in process to reduce dust amounts • Substitution of materials i.e. capsule form, pellets or liquid • Segregation or enclosure of the dust creation process • Damping down the dust for easier removal such as vacuuming • Methods of cleaning so as not to disturb the dust i.e. vacuuming instead of sweeping |
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Outline necessary precautions to be taken when pedestrians are required to work close to vehicle movement areas. (8)
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• Segregation systems for vehicles and pedestrians
• Clear and appropriate road markings • Visibility – mirrors, transparent doors, adequate lighting etc. • Vehicular audible warnings • Site rules • High-visibility clothing • Good housekeeping • Training and supervision of all involved on site |
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Factory cleaning staff uses a rotary floor polisher each night.
(i) Identify the associated hazards. (4) |
• Segregation systems for vehicles and pedestrians
• Clear and appropriate road markings • Visibility – mirrors, transparent doors, adequate lighting etc. • Vehicular audible warnings • Site rules • High-visibility clothing • Good housekeeping • Training and supervision of all involved on site |
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Factory cleaning staff uses a rotary floor polisher each night.
(ii) Outline what control measures could be used to reduce the risks. (4) |
• Guarding
• Cable management • Isolation for the task of changing brushes • Appropriate non-slip footwear • Regular testing and maintenance • Residual current devices – RCD’s • Training to ensure pre-use checks |
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Outline precautions needed when maintenance work is being carried out in an underground storage vessel. (8)
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• Permit-to-work
• Risk assessment • Isolation • Pre-cleaning • Purging and testing the vessel’s atmosphere • Safe means of access and egress • Appropriate tools i.e. non-spark • P.P.E • Appropriate lighting • Continual monitoring • Competent and trained personnel • Good communication systems between tank and above-ground workers • Maintenance of detailed emergency procedures |
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Outline the principal requirements to ensure excavation work is carried out safely. (8)
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• Examine the support structures weekly by competent person
• Record examination • Inspect working part daily or per shift if deeper than 2m • Inspect support material before use • Support work done under supervision of competent person • No person to work in excavation unless competently examined • No projecting nails on support structure • No materials left near edges of excavation |
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With respect to work-related upper limb disorders (WRULD’s).
(i) Identify typical symptoms. (4) |
• Back, neck and shoulder pain
• Swollen joints • Reduced mobility and stiffness • Cramps and muscle fatigue/tiredness |
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With respect to work-related upper limb disorders (WRULD’s).
(ii) Outline the factors that would increase the development of WRULD’s. (4) |
• Display screen equipment issues – DSE
• Layout of workstation • Insufficient breaks from the task • Inadequate space leading to poor postures • Excessive force needed to carry out tasks • Frequency of the task • Vibrating tools/equipment • Pre-existing medical conditions • Pregnant women |
