What colour coding is required for an oxygen cylinder to comply with the European standard BS EN 1089-3? See Student Workbook p52
All green
White shoulder and black body
White shoulder and green body
White shoulder
Black and white quarters
What type of pillar valve connection is required for an oxygen cylinder to comply with the European standard BS EN 850? See Student Workbook p52
DIN
300 bar DIN
M26
A-clamp
2-pin index
What design feature of an oxygen regulator makes it unsuitable for use underwater, even if it could be fed with breathing gas and fitted with a suitable demand valve? See Student Workbook p53
The materials are not corrosion resistant
It is not waterproof
The first stage uses a balanced diaphragm
The first stage delivers a fixed pressure
It will only work with oxygen
Why do oxygen demand valves enclose the nose, unlike a conventional scuba DV which is gripped by the teeth? Tick all that apply. See Student Workbook pp53-54
Why is the oro-nasal mask of an oxygen demand valve made of transparent material? See Student Workbook pp53-54
They're not always transparent. Children's versions often have teddy bears and other nursery characters printed on a bright background.
To prevent excessive sweating, which can cause soreness and discomfort for the casualty
To enable monitoring of the casualty's airway/breathing
There is no choice. The type of plastic used is only available in a transparent form
To keep the cost down. Opaque, coloured plastics are more expensive and less durable.
In what way can a positive pressure resucitation mask set to too high a flow rate harm a casualty? See Student Workbook p54
Over-inflating the lungs, causing burst lung
Inflating the casualty's stomach, causing stomach contents to be displaced into the throat
Pressurising the Eustachian tubes, causing reversed ear and possible rupture of the eardrums
Driving nasal mucus into the airways
Which of the following can a pocket mask be used for? Tick all that apply. See Student Workbook p55
What are the benefits of a reservoir mask over a pocket mask? See Student Workbook pp55-56
It is disposable
It gives a higher oxygen concentration
It requires a lower flow rate
It is easier for the casualty to breathe from
It is as good as a demand valve
Which of the following are alternative names for a reservoir mask? Tick all that apply. See Student Workbook pp55-56
Which is the correct way to use a reservoir mask? See Student Workbook pp55-56
Fill the bag before use
Let the bag inflate as the casualty breathes from it
Fill the bag after use
The bag is self-inflating, so it doesn't matter
What feature must a storage case have if it is to be used to house an oxygen cylinder? See Student Workbook pp56-57