Mock Exam Paper 2 and Sample Answers (December 2002)

7/29/2019 Mock Exam Paper 2 and Sample Answers (December 2002)

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1) An employee is to use a petrol driven chainsaw to fell a tree from

ground level.

i) Outline the hazards faced by the employee in carrying out this

task. (10)

ii) ListFIVE items of personal protective equipment that should be

provided to, and used by, the employee. (5)

iii) Outline control measures other than personal protective

equipment that would be necessary to ensure the health and safety

of the chainsaw operator and other persons involved in the

operation. (5)

Sample Questions December 2002- Paper 2


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Model Answer1) An employee is to use a petrol driven chainsaw to fell a tree from ground level.

i) Outline the hazards faced by the employee in carrying out this task. (10)

Hazards associated with this task includes:

contact with moving parts of the chainsaw (the chain in particular);

exposure to fumes and dust;

manual handling hazards;

noise and vibration;

ejected particles and fragments;

falling objects (ultimately, the tree itself);

fire and explosion hazards from the fuel

hot parts of the chainsaw,

uneven and/or wet ground,

the use of lubricating oils and

exposure to sunlight.


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Model Answer

1) An employee is to use a petrol driven chainsaw to fell a tree fromground level.

ii) ListFIVE items of personal protective equipment that should be

provided to, and used by, the employee. (5)

Head Protection such as hard hat against falling objects

Hand Protection such as appropriate gloves against sharp objects

and chemical substances used by petrol-driven chainsaw.

Face or Eyes Protection against ejected particles and fragments

Respiratory Protection against fumes and dust

Ear Protection such earmuffs or ear plugs against noise

Foot protection such as safety shoes and/or sturdy shoes.


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Model Answer1) An employee is to use a petrol driven chainsaw to fell a tree from ground level.

iii) Outline control measures other than personal protective equipment that

would be necessary to ensure the health and safety of the chainsaw operator and

other persons involved in the operation. (5)

Ranges of suitable control measures might include:

proper planning of the job;

placing barriers and warning signs to restrict access to the felling area;

ensuring that the chainsaw is suitable for the task, that the guard is always in

place and that the equipment is properly maintained;

using only certificated operators;

providing information, instruction and training for the job in hand;

ensuring adequate supervision to check that procedures (relating to safe felling

methods, refuelling, exclusion zones, etc) are followed; and

introducing a system of health surveillance (eg to look for signs of hearing loss

and/or hand-arm vibration syndrome).


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Sample Questions December 2002

2) Outline the means by which the risk of accidents from reversingvehicles within a workplace can be reduced. (8)

Model Answer Avoiding the need for vehicles to reverse (one-way and `drive-through'

systems, turning circles, etc), The separation of vehicles and pedestrians (barriers, signs, etc) and

Aspects of vehicle and workplace design (audible alarms, mirrors on vehicles

and at blind corners, refuges, lighting, etc),

To procedural measures (use of banksmen, site rules, driver training, etc).

The drawing up and enforcement of site rules

The wearing of high visibility clothing,

A good standard of housekeeping,

Training for, and

Supervision of, all concerned.


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Sample Questions and Model Answers Dec 2002

3) (a) Identify:

(i) TWO mechanical hazards associated with moving parts of

machinery. (2)

Mechanical hazards (ie those from moving parts of machineryand/or the material being worked) include impact, entanglement,

crushing, shearing, ejection, cutting and abrasion.

(ii) TWO non-mechanical hazards to which a machine operator may

be exposed. (2)

Non- mechanical machinery hazards includes noise, vibration,

electricity, hazardous substances, radiation, extremes of

temperature and ergonomic issues.


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3) (b) Outlinea hierarchy of control measures that may be used to

reduce the risk of injury from dangerous parts of machinery.

(4)

The Provision and Use of Work Equipment Regulations 1998 and

the requirements of Regulation 11 referred to;

fixed guards,

other types of guards or protective devices,

safety aids such as jigs, holders and push sticks, and

the provision of information, instruction, training and supervision

Sample Questions and Model Answers

Dec 2002


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4) In relation to electrical safety, explain the meaning of the following terms:

(i) isolation (2)

Refers to shutting off the electrical supply to an item of equipment or part of an

electrical system and preventing inadvertent reconnection in order, for instance,

to carry out maintenance work

(ii) earthing (2)

Is a means whereby electrical equipment and conductive items are connected

to earth by a cable or metal pipework such that the route to earth provides the

path of least resistance to a current flowing under fault conditions.

(iii) reducedlowvoltage (2)

Commonly used on construction sites, involves the reduction of mains voltage

by a transformer to a lower, safer voltage - typically 110 or 55 volts

(iv) overcurrentprotection (2)

Is a method of preventing the flow of excess current by cutting the supply under

fault conditions by means of a fuse or circuit breaker.



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5) Outline the precautions to ensure the health and safety of personsengaged in paint spraying in a motor vehicle repair workshop. (8)

Segregation of the activity, typically by means of a spray booth

fitted with local exhaust ventilation and

Protected electrical equipment; Suitable storage and fire precautions for flammable paints and

solvents;

The provision and use of personal protective equipment (clothing,

respiratory protection, etc); Monitoring employees' exposures to airborne substances;

Ensuring the examination and maintenance of control measures;

Providing appropriate training to employees; and

Maintaining welfare and hygiene facilities.



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6)An employee is engaged in general cleaning activities in a large veterinary practice.(i) IdentifyFOUR possible hazards the cleaner could encounter when undertaking

this activity. (4)

Hazards specifically relating to cleaners such as cleaning fluids, manual

handling, slips/trips/falls and sharp objects and those associated with the

working environmentsuch as biological hazards, contact with animals and thosearising from the use of specialised equipment.

(ii) Outline the precautions that could be taken to minimise the risk of harm from

these hazards. (4)

the provision and use of personal protective equipment (including overalls and

gloves), the use of suitably maintained and tested equipment,

ensuring the adherence to procedures for the handling and disposal of sharps,

the need for animals to be kept in secure enclosures, and

the possible need for immunisation against diseases known to be transmitted

by animals.

Sample Questions and Model Answer Dec. 2002


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7) (a) State the primary effect on the body of the following types of hazardous

substance:

(i) irritant (1)

cause inflammation on contact with the skin, eyes or mucous membranes

(ii) corrosive (1)

cause the destruction of living tissue at the point of contact - for example, the

skin, respiratory tract or digestive tract

(iii) toxic (1)

have a poisonous effect on body organs or systems, affecting normal metabolicfunctions

(iv) carcinogenic. (1)

have the ability to alter the genetic material in living cells and to cause cancer

Sample Questions and Model Answer Dec. 2002


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7) (b) Describe the differences between acute and chronic health

effects. (4)

Acute health effects appear after a single or short term exposure,usually with a rapid or immediate response, whereas;

Chronic effects are normally produced following prolonged or

repeated exposures to an agent, appear gradually, may go

unrecognised for long periods of time and may be progressive evenwithout further exposure.

Sample Questions and Model Answer Dec 2002


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8) Outline the precautions to be taken when using a mobile elevating work platform(MEWP) to reach a high point such as a streetlight. (8)

the need to inspect the equipment before use and to ensure it is in a good state

of repair;

using only competent workers;

using outriggers and brakes;

erecting warning signs and barriers to avoid collisions;

ensuring the platform is not overloaded;

avoiding overhead obstructions; wearing a harness,

the protection of those at ground level,



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9) In relation to work related upper limb disorders (WRULDs):(i) Identifythe typical symptoms that might be experienced by affected individuals (4)

Typical symptoms such as pain to the back, neck, shoulders and/or arms,

swollen joints, reduced mobility and stiffness, cramps and muscle fatigue.

Typically, such conditions will affect sleep and normal functioning

(ii) Outline the factors that would increase the risk of developing WRULDs. (4)

workstation layout,

the failure to provide sufficient breaks from the task,

space constraints resulting in poor working postures,

excessive force or awkward hand movements needed to carry out an operation, the frequency with which tasks need to be repeated,

the use of vibrating tools and equipment,

the involvement of vulnerable workers such as those with pre-existing medical

conditions and pregnant women.



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10) (a) Explainthe following terms in relation to noise exposure at work:

(i) noise-induced hearing loss (2)

is normally caused by prolonged exposure to high noise levels causing damage

to the hair cells of the inner ear and leading to a permanent threshold shift at

particular frequencies, which worsens with continued exposure both in terms of

the extent of the threshold shift and of the frequencies affected

(ii) 'tinnitus (2)

Tinnitus, on the other hand, is typified by a ringing or similar sound in the ears

caused by overstimulation of the hair cells. It can be acute or chronic,

permanent or intermittent

(b) Identify FOUR limitations of personal hearing protection as a means ofprotecting against the effects of noise. (4)

The main limitations of hearing protection, identified in terms of poor fit,

resistance to use, comfort factors, incompatibility with other protective

equipment,costly in terms of replacement and maintenance, interference with

communication, hygiene problems and the need for constant supervision.



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11) ListEIGHT ways of reducing the risk of a fire starting in a workplace.

(8)

control of smoking and smoking materials,

good housekeeping to prevent the accumulation of waste paper

and other combustible materials,

regular lubrication of machinery,

frequent inspection of electrical equipment for damage,

ensuring ventilation outlets on equipment are not obstructed,

controlling hot work, the provision of proper storage facilities for flammable liquids and

the segregation of incompatible chemicals and

implementing security measures to reduce the risk of arson.



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Mock Exam Paper 2 and Sample Answers (December 2002)