Questions and Answers
Fires are grouped into what categories?
Class A, B, C, and D
A fire in a pile of canvas is classified as class __________.
A
A fire in trash and paper waste is classified as class _____________.
A
A fire in a pile of linen is a class ___________.
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A fire in a pile of dunnage would be classified as class _________.
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Burning wood is which class of fire?
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The class of fire on which a blanketing effect is essential is class ________.
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A galley grease fire would be classified as which class of fire?
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An oil fire is classified as class ___________.
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Fires are grouped into what categories?
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A fire in a pile of canvas is classified as class __________.
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A fire in trash and paper waste is classified as class _____________.
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A fire in a pile of linen is a class ___________.
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A fire in a pile of dunnage would be classified as class _________.
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Burning wood is which class of fire?
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The class of fire on which a blanketing effect is essential is class ________.
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A galley grease fire would be classified as which class of fire?
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An oil fire is classified as class ___________.
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If ignited, which material would be considered a class B fire?
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What is the primary hazard, other than fire damage, associated with a class C fire?
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A class C fire would be burning ___________.
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A fire in the radio transmitter would be of what class?
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A fire starts in a switchboard due to a short circuit. This is which class of fire?
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Fires which occur in energized electrical equipment, such as switchboard insulation, are class ____________.
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A fire in a transformer terminal would be classified as class __________.
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An aluminum powder fire is classified as class ______________.
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A magnesium fire is classified as class _________.
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Fires in combustible metals, such as sodium or magnesium, are classified as class ______________.
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Fires of which class would most likely occur in the engine room of a vessel?
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Spontaneous combustion is caused by ________________.
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Accumulations of oily rags should be _________.
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Oily rags stored in a pile that is open to the atmosphere are a hazard because they may ____________.
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Spontaneous combustion is most likely to occur in __________.
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A fire started by spontaneous combustion can be expected in which condition?
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Spontaneous ignition can result from _______________.
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Which substance might be subject to spontaneous combustion?
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Study Notes
Classes of Fire Overview
- Fires are categorized into four classes: A, B, C, and D.
Class A Fires
- Class A fires involve ordinary combustibles such as:
- Canvas
- Trash and paper waste
- Linen
- Dunnage
- Burning wood
Class B Fires
- Class B fires require a blanketing effect for extinguishing.
- Common instances include:
- Grease fires, such as those occurring in a galley
- Oil fires
- Diesel oil is a designated Class B fire when ignited.
Class C Fires
- Class C fires pertain to fires involving energized electrical equipment.
- Major hazards include the risk of electrocution or shock.
- Notable scenarios include:
- Fires in electrical insulation
- Fires in radio transmitters
- Fires originating from short circuits in switchboards
- Fires occurring in transformer terminals
Class D Fires
- Class D fires involve combustible metals, including:
- Aluminum powder
- Magnesium
- Other substances like sodium
Likely Situations
- Engine rooms of vessels are primarily at risk for Class B and C fires.
- Conditions that lead to spontaneous combustion include:
- Chemical actions within substances
- Accumulations of oily rags should be discarded promptly to prevent hazards
- Oily rags exposed to the atmosphere are prone to spontaneously heat and ignite.
- Spontaneous combustion is most likely in rags soaked in linseed oil.
Spontaneous Combustion
- Factors contributing to spontaneous combustion:
- Careless disposal or storage of materials can lead to ignition.
- Potential hazards include stowing oily rags in metal pails.
- Substances that may undergo spontaneous combustion include coal, scrap rubber, and leather.
Fire Prevention
- To reduce the risk of fires, particularly those due to spontaneous combustion, ensure proper storage and disposal practices are followed.
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Test your knowledge on the classifications of fires with these flashcards. Each card presents a scenario or question to help you learn the main categories of fire: Class A, B, C, and D. Perfect for students and professionals in fire safety and management.
