Properties of Air and Gas Handling

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What is the primary characteristic of air that makes it non-flammable?

It is colourless and odourless

It is a single, pure gas

It lacks a combustible component (correct)

It is a mixture of several gases

What is the approximate percentage of oxygen in pure, dry air at sea level?

20.94% (correct)

50.00%

0.94%

78.09%

Which of the following gases is NOT typically present in mine air?

Oxygen

Neon (correct)

Carbon dioxide

Hydrogen

What is the purpose of regulatory requirements and site-specific procedures regarding gases in pressurized containers?

To dictate special precautions for safety Signup and view all the answers

Which of the following gases is present in the smallest proportion in pure, dry air at sea level?

Carbon dioxide Signup and view all the answers

What is the state of air at high pressure?

Liquid Signup and view all the answers

What is a potential effect of MAPP on skin contact?

Causes tissue freezing or frostbite Signup and view all the answers

What is the explosive range of methane?

5% - 15% Signup and view all the answers

What is the main risk associated with methane in enclosed spaces?

Asphyxiation Signup and view all the answers

What is a common source of methane?

Decaying timber Signup and view all the answers

What is a unique property of nitrogen?

It is inert Signup and view all the answers

What is a common use of nitrogen in industry?

In liquid or compressed gas form Signup and view all the answers

What is the primary effect of nitrogen dioxide on the respiratory passages?

Corrosion and irritation Signup and view all the answers

What is the minimum concentration of nitrogen dioxide in the atmosphere that causes immediate throat irritation?

60 PPM Signup and view all the answers

Which process is responsible for forming oxygen in the atmosphere?

Photosynthesis Signup and view all the answers

What is the effect of nitrogen dioxide on the colour of the atmosphere?

It turns the atmosphere reddish brown Signup and view all the answers

What is the minimum concentration of nitrogen dioxide that is quickly fatal after short exposure?

200 PPM Signup and view all the answers

Why is oxygen essential for human life?

It is required to support life and combustion Signup and view all the answers

What is the main purpose of the scene survey in emergency scene management?

To take control of the scene, find out what happened and make sure the area is safe Signup and view all the answers

What is the correct sequence of actions in emergency scene management?

Scene survey, primary survey, secondary survey, ongoing casualty care Signup and view all the answers

What is the purpose of the secondary survey in emergency scene management?

To gather information to form a complete picture of the casualty's overall condition Signup and view all the answers

Why is emergency scene management important in emergency situations?

To ensure safe and appropriate first aid is given and everyone's safety is protected Signup and view all the answers

What is the benefit of following a sequence of actions in emergency scene management?

It ensures that safe and appropriate first aid is given and everyone's safety is protected Signup and view all the answers

What is the primary purpose of the scene survey?

To take charge of the situation and make the area safe Signup and view all the answers

When should you send or go for medical help?

As soon as you identify a serious problem Signup and view all the answers

What is the purpose of the primary survey?

To check for life-threatening conditions Signup and view all the answers

What should you do if the casualty is conscious during the primary survey?

Ask 'what happened?' to determine if the airway is clear Signup and view all the answers

What is the recommended order of performing the primary survey?

Airway, Breathing, Circulation Signup and view all the answers

What is the purpose of a rapid body survey during the primary survey?

To feel for severe bleeding, internal bleeding, and obvious fractures Signup and view all the answers

What should you do if you suspect a head or spinal injury and have been trained?

Use a jaw-thrust without head-tilt Signup and view all the answers

What is the recommended time frame for checking for breathing in an unconscious casualty?

At least 5 seconds, but no more than 10 seconds Signup and view all the answers

What is the priority after checking for breathing in an unconscious casualty?

Checking for circulation Signup and view all the answers

What is the purpose of checking for shock during the primary survey?

To check for skin condition and temperature Signup and view all the answers

What is the first step in the triage sequence of actions?

Determine how many casualties there are in the scene Signup and view all the answers

When should you move a casualty?

When there are life-threatening hazards to yourself or the casualty Signup and view all the answers

What is the priority when performing secondary survey?

Begin with the highest priority casualties Signup and view all the answers

Why should you always try to give necessary first aid where the casualty is found?

Because it is safer for the casualty and the first aider Signup and view all the answers

What should you do if you encounter a casualty who is obviously dead?

Move on to the next nearest casualty Signup and view all the answers

When a head or spinal injury is suspected, what is the first step in providing first aid?

Tell the casualty not to move Signup and view all the answers

How should you move a casualty with a suspected head or spinal injury?

Move the head, trunk, and legs together as a unit Signup and view all the answers

What is the purpose of keeping the head and neck supported while giving first aid?

To prevent movement that could cause further injury Signup and view all the answers

When should you give first aid in the position in which the casualty is found?

As much as possible, especially when a head or spinal injury is suspected Signup and view all the answers

What should you do if a bystander is available to help when a head or spinal injury is suspected?

Show the bystander how to support the head and neck Signup and view all the answers

When should you provide CPR to an unresponsive casualty?

If the casualty is not breathing or not breathing normally Signup and view all the answers

What is the purpose of evaluating the situation and deciding whether to do a secondary survey?

To assess the availability of medical help Signup and view all the answers

When do you need to turn a casualty over to assess for life-threatening injuries?

To give lifesaving first aid or to assess for life-threatening injuries Signup and view all the answers

What is the correct way to turn a casualty face up?

Extend the arm closest to you over the head and tuck the far arm against the casualty's side Signup and view all the answers

What should you do if you do not do a secondary survey?

Steady and support any injuries found and give ongoing casualty care Signup and view all the answers

Why is it important to maintain the casualty's body temperature?

To prevent shock Signup and view all the answers

When should you do a secondary survey?

If the casualty has more than one injury, medical help will be delayed more than 20 minutes, or medical help is not coming to the scene Signup and view all the answers

What should you do to an unresponsive casualty who is not breathing?

Provide CPR Signup and view all the answers

What is the first step in turning a casualty face up?

Extend the arm closest to you over the head Signup and view all the answers

What should you do for an unresponsive casualty who is found in an unusual position?

Turn the casualty over to assess for life-threatening injuries Signup and view all the answers

What is the primary goal of triage in a multiple casualty situation?

To do the most good for the greatest number of casualties Signup and view all the answers

How are casualties categorized in triage?

Into three levels of priority: highest, medium, and lowest Signup and view all the answers

What is the primary consideration in multiple casualty management?

The severity of the injuries Signup and view all the answers

In a lightning strike scenario with multiple casualties, how does the principle of triage change?

The principles of triage are reversed Signup and view all the answers

What should you do if you notice a change in a casualty's level of consciousness?

Record the change and continue ongoing casualty care Signup and view all the answers