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Year 2 Clinical Studies and Dispensing > Safety specs > Flashcards

Safety specs Flashcards

1
Q

What year was the Health and Safety at Work legislation brought in?

A

1993

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2
Q

Which regulations within the Health and Safety at Work legislation is eye protection in?

A

PPE

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3
Q

What does housing mean?

A

Frames

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4
Q

What does oculars mean?

A

Lenses

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5
Q

What are the types of protective eyewear?

A

Afocal one-piece (wrap around)
Box type goggles
Cup type goggles
Face shields/visors
Safety specs

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6
Q

What are the features of afocal one-piece protectors?

A

One size
No rx
Polycarb

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7
Q

What are the features of box type goggles?

A

Afocal (no rx)
Oculars polycarb or cellulose acetate
Housing PVC

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8
Q

What are the features of cup type goggles?

A

Enclose each eye individually
Uncomfortable

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9
Q

What are face shields/visors useful for?

A

Protecting against splashes and flying particles

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10
Q

What is the housing of safety specs normally made from?

A

Plastic: cellulose acetate, polyamide or polycarb
Metal: Plated nickel alloy

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11
Q

What are the requirements for side shields on safety specs?

A

Transparent
Vented
Usually polycarb

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12
Q

For testing safety specs, what height is the ball dropped from?

A

1.3m

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13
Q

What does the S marking mean?

A

Increased robustness

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14
Q

For the S marking (increased robustness), what is the specification of the ball used in testing oculars?

A

22mm diameter
Steel
43g
5.1m/s

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15
Q

For the S marking (increased robustness), what is the specification of the ball used in testing housing?

A

6mm diameter
Steel
0.86g
12m/s

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16
Q

What does the F marking mean?

A

Low energy impact

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17
Q

For the F marking (low energy impact), what is the specification of the ball used in testing?

A

6mm diameter
Steel
0.86g
45m/s

18
Q

What does the B marking mean?

A

Medium energy impact

19
Q

For the B marking (medium energy impact), what is the specification of the ball used in testing?

A

6mm diameter
Steel
0.86g
120m/s

20
Q

What does the A marking mean?

A

High energy impact

21
Q

For the A marking (high energy impact), what is the specification of the ball used in testing oculars?

A

6mm
Steel
0.86g
190m/s

22
Q

What markings must be engraved on a safety spec lens?

A

Manufacturer identification
Optical class (level of wear)
Certification mark (CE/UKCA)

23
Q

What are the optional engravings on a lens of a safety spec?

A

Scale numbers
Mechanical strength symbol
Field of use
Kitemark

24
Q

What are the optical classes?

A

1: continuous
2: occasional
3: intermittent

25
Q

What markings must be on the housing?

A

Manufacturer’s mark
EN 166
Impact grade (F, B or A)
CE/UKCA mark

26
Q

What plastic lens materials can be used for safety specs?

A

Polycarbonate
Trivex
CR39

27
Q

What are the features of polycarbonate lenses (for safety specs)?

A

Highest impact resistance
Low Abbé number (colour fringing)

28
Q

What are the features of CR39 lenses (for safety specs)?

A

Better impact resistance than PMMA (used originally for safety specs)

29
Q

What are the glass materials that can be used for safety specs lenses?

A

Heat toughened glass
Chemically toughened glass

30
Q

What are the features of heat toughened glass?

A

Breaks into blunt, cube shaped pieces

31
Q

What are the features of chemically toughened glass?

A

Breaks in radial fracture pattern with concentric cracks

32
Q

Can repairs be done on safety specs by anyone other than the manufacturer?

A

No

33
Q

What are the field of use markings?

A

No symbol
3
4
5
8
9
G
K
N

34
Q

What does the field of use marking 3 mean?

A

liquids

35
Q

What does the field of use marking 4 mean?

A

large dust particles

36
Q

What does the field of use marking 5 mean?

A

gas/fine dust particles

37
Q

What does the field of use marking 8 mean?

A

short circuit/electric arc

38
Q

What does the field of use marking 9 mean?

A

molten metal/hot solids

39
Q

What does the field of use marking G mean?

A

resistant to radiant heat

40
Q

What does the field of use marking K mean?

A

resistant to fine dust particles

41
Q

What does the field of use marking N mean?

A

non-fogging properties

42
Q

What does no field of use marking mean?

A

general purpose

Year 2 Clinical Studies and Dispensing (14 decks)

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