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NEBOSH Diploma > Work Equipment (Workplace Machinery) > Flashcards

Work Equipment (Workplace Machinery) Flashcards

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1
Q

Regs covering the Workplace Machinery

A

Supply of Machinery (Safety) Regulations 2008 (SMSR)

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2
Q

Relationship between SMSR and PUWER

A

SMSR places duties on the supplier to ensure machinery complies.
PUWER is concerned with worker safety and employers duty to ensure it is safe for use

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3
Q

Principles of Safety Integration definition

A

Machinery must be designed and constructed so it is fit for its function and can be operated, adjusted and maintained without putting people at risk

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4
Q

3 Principles of Safety Integration

A

Eliminate or Reduce risks
Take necessary protective measures
Inform users of the residual risks

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5
Q

Risk Assessment for Machinery

A 
Determine the limits of the machinery
Identify the hazards
Estimate the risks
Evaluate the risks
Eliminate the hazards or reduce the risks
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6
Q

Machinery limits

A

Use
Space
Time
Other

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7
Q

Use limits

A

include intended use and the reasonably foreseeable missue.
Includes:
Different operating modes
Use of machinery e.g. industrial, domestic
General info about intended user population
Anticipated levels of training required
Exposure to other persons of hazards associated with the machinery

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8
Q

Space limits

A

Range of movement
Space requirements for person to interact with the machinery
Human interaction
Machine power-supply interface

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9
Q

Time limits

A

Life limit of the machinery

Recommended service intervals

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10
Q

Other limits

A

Environmental considerations
Housekeeping
Properties of materials to be processed

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11
Q

Risk Estimation

A

1) the exposure of the person to the hazard
2) the occurance of a hazardous event
3) the technical and human possibilities of avoiding or limiting the harm

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12
Q

Risk Evaluation

A

Determines if risk reduction is required or not

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13
Q

Risk Reduction 3 staged approach

A

1) Inherently Safe Design - Eliminate
2) Risk Reduction - Reduce using guards etc.
3) Provision of information - Instructions, PPE etc.

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14
Q

Process for CE Marking

A

1) Catagorise the product
2) Check application of additional directives
3) Ensure requirements of safety regs are met
4) Perform the risk assessment
5) Compile the technical file
6) Issue the declaration of conformity
7) Affix the CE mark

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15
Q

Mechanical Hazards - EnTICE

A 
Entanglement
Traps
Impacts
Contacts
Ejection
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16
Q

Non-mechanical Hazards

A 
Electrical
Thermal
Noise
Vibration
Radiation
Materials and Substance
Ergonomic
Slip Trip
Environmental Hazards
Combination of the above
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17
Q

Mechanical Hazards

A

To do with the moving parts of the machine

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18
Q

Non-mechanical Hazards

A

To do with all other aspects

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19
Q

CNC Machinery

A

Computer Numeric Machinery. Machinery programmed with a code enabling them to repeat operations with increased speed and a high level of precision

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20
Q

Protective Devices PUWER Regs

A

Absolute duty to take effective measures to either
Prevent access to the dangerous part of the machinery or to any rotating stock-bar
To stop the movement of any dangerous part of machinery or rotating stock bar before any part of a person enters the danger zone

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21
Q

Hierarchy for Machine Guarding

A

Fixed Guards
Other guards and protection devices
Protection Appliances

22
Q

Protection Devices

A

Stop movement of dangerous part before contact can be made e,g trip devices, light curtains, pressure sensitive mats

23
Q

Protection appliances

A

Used to hold or manipulate a work piece at a machine whilst keeping the operators body clear of the danger zone

24
Q

Fixed guards

A

Enclosing guard - prevents access to DZ from all sides

Distance guard - does not completely enclose DZ but prevents access due to its distance from DZ such as a perimeter fence or a tunnel guard

25
Q

Advantages of fixed guards

A 
Low cost
Easy to monitor by visual inspection
Can only be defeated by intentional act
Min ongoing maintenance
May offer additional protection for noise, dust, ejected parts
26
Q

Disadvantages of fixed guards

A

Removal doesn’t stop the machine
If it needs to be removed regularly for maintenance it is likely to be left off
May impede operators view
May impede ventilation

27
Q

Other guards

A

Interlocked (moveable) guards
Adjustable guards
Self-adjusting guards
Automatic (Sweep) guards

28
Q

Protection Devices

A

Mechanical trip devices
Active Opto-Electronic Devices (AOED) - Light curtains
Pressure-sensitive mats
Two-hand controls

29
Q

Interlocked guards

A

Machine cannot operate until guard is in place
Opening the guard whilst the machine is operating will stop the machine
Closing the guard does not by itself restart the machine

30
Q

Trapped Key / Key Transfer System

A

The guard lock and switch are separate. The removable key is trapped in either the guard lock or switch lock.

31
Q

Advantages of interlocked guards

A

Convenient where frequent access is required

Allow safe access when opened machine is powered down

32
Q

Disadvantages of interlocked guards

A

Complex systems requiring regular testing and maintenance
Components may fail in use
May be defeated
Failure may not be apparent until after an incident

33
Q

Self-closing guards

A

Automatically open and close as the work piece is put in and pulled out. The moveable guard automatically returns by spring or gravity to a closed position as soon as the work piece has been moved away

34
Q

Advantages of self-closing guards

A

Automatically adjust to accommodate the workpiece

35
Q

Disadvantages of self-closing guards

A

Only provide a partial guarding solution as it still allows some access to dangerous parts
Require regular maintenance and inspection

36
Q

Adjustable guards

A

Used on traditional engineering workshop machines.

They rely on the operator to set the guard up properly for each operation

37
Q

Advantages of adjustable guards

A

Probably the only solution when a workpiece needs to come into contact with a cutting tool

38
Q

Disadvantages of adjustable guards

A

Have to leave part of the cutting tool accessible to do the job
May be set to accommodate the largest job on a shift and not adjusted for each piece
Can be removed and the machine is still usable.

39
Q

Two-handed Controls

A

Can be used when guarding is impractical to ensure the operator is outside of and unable to reach the danger zone as both hands are required to use the control which is positioned away from danger

40
Q

Advantages of two-handed controls

A

Ensures the operator is in a safe position

41
Q

Disadvantages of two-handed controls

A

Only protects the operator

Can be defeated

42
Q

Electro-Sensitive Protective Equipment (ESPE)

A

Light curtain or light beam device. If beam is broken the machine will stop

43
Q

Advantages of Light Beams

A

Allow and unobstructed view of the machine

44
Q

Disadvantages of Light Beams

A

Not suitable in all environments, dust could trigger false trips
No physical barrier so no protection from ejections or non-mech hazards
Do not protect anyone working inside the danger zone

45
Q

Pressure sensitive mats

A

Machine shuts off when someone walks on the mat which has sensors built in. Can be prone to failure due to heavy use/footfall

46
Q

Safe Maintenance Operations - PUWER

A

Reg 22 puts duty that maintenance can be carried out (SFARP) without risk to H&S

47
Q

JSA

A

Job Safety Analysis - used to break a task down into component steps to identify hazards at each stage

48
Q

MEEP

A

Materials, Equipment, Environment or People Analysis, prompts consideration of potentially unsafe acts or conditions

49
Q

SSW

A

Safe System of Work - Formal procedure which results from a systematic examination of a task in order to identify all the hazards. It defines safe methods to ensure that hazards are eliminated or risk minimised

50
Q

Control Systems

A

A system or device which responds to input signals and generates an output signal which causes the equipment to under control to operate in a particular manner

51
Q

Safety Related Control Systems

A

Part of the control system of a machine that forms a safety function

NEBOSH Diploma (9 decks)

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