Stages of Combustion Quiz
78 Questions
8 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of fire in ecology?

  • To reset succession (correct)
  • To prevent colonization
  • To maintain community structure
  • To promote biodiversity

    • In terms of oxidation, how does fire differ from rusting and decomposition?

  • Fire reactions are exothermic (correct)
  • Fire reactions are slower
  • Rusting and decomposition release more heat
  • Rusting and decomposition involve combustion

    • When did the idea of fire ecology become a recognized field of study?

  • 1935
  • 1962 (correct)
  • 1866
  • Recently

    • How does the removal of fire act as a disturbance in an ecosystem?

    <p>It shifts community structure</p> Signup and view all the answers

    Which type of bonds contain less potential energy and therefore release less energy during combustion?

    <p>H-O-H bonds</p> Signup and view all the answers

    What process involves the thermal degradation of fuel into smaller components that eventually burn?

    <p>Pyrolysis</p> Signup and view all the answers

    During which phase of combustion is heat absorbed?

    <p>Endothermic stage</p> Signup and view all the answers

    Which phase marks the transition to combustion in the process described?

    <p>Ignition</p> Signup and view all the answers

    What is the main characteristic of smoldering combustion?

    <p>Presence of smoke and no flames</p> Signup and view all the answers

    Which type of combustion does not have enough heat to maintain the combustion process?

    <p>Extinction</p> Signup and view all the answers

    What differentiates flaming combustion from smoldering combustion?

    <p>Presence of flames and no smoke</p> Signup and view all the answers

    What causes the flame to appear when the wind blows during combustion?

    <p>High presence of oxygen (O2)</p> Signup and view all the answers

    What type of heat transfer is described as occurring below a flame?

    <p>Conduction</p> Signup and view all the answers

    What is the first stage of wood combustion discussed in the text?

    <p>Pre-heat stage</p> Signup and view all the answers

    Which component of wood is highlighted as affecting the combustion process in the text?

    <p>Cellulose</p> Signup and view all the answers

    What process occurs after char combustion in wood combustion stages?

    <p>Ash</p> Signup and view all the answers

    What happens if the percentage of O2 in the atmosphere is less than 16%?

    <p>It becomes harder for things to burn</p> Signup and view all the answers

    Which phase of combustion is responsible for drying the material before breakdown begins?

    <p>Dries material phase</p> Signup and view all the answers

    What is the main source of heat to continue combustion during the process?

    <p>From the previous reaction</p> Signup and view all the answers

    What type of material is the only one that creates flames during combustion?

    <p>Gases</p> Signup and view all the answers

    Which type of bonds contain less potential energy and therefore release less energy during combustion?

    <p>H-O-H bonds</p> Signup and view all the answers

    What is the term for taking a liquid and bringing it to a gas stage in the combustion process?

    <p>Volatilization</p> Signup and view all the answers

    Which phase of combustion involves the transition to combustion and is considered an exothermic stage?

    <p>Ignition</p> Signup and view all the answers

    What is the main source of energy release from combustion according to the text?

    <p>O2 breaking in the reaction</p> Signup and view all the answers

    What differentiates the combustion process known as 'glowing' from 'smoldering'?

    <p>Glowing involves no smoke, while smoldering does.</p> Signup and view all the answers

    Why did some parts of the material not burn completely?

    <p>The material was too wet to burn efficiently.</p> Signup and view all the answers

    What causes the presence of flames during combustion when the wind blows?

    <p>The wind creates more oxygen for combustion.</p> Signup and view all the answers

    In the context of the text, what is the primary role of oxygen in combustion?

    <p>To sustain and support the combustion process.</p> Signup and view all the answers

    What stage of wood combustion involves the transition to flaming after pre-heating?

    <p>Pyrolysis</p> Signup and view all the answers

    Which heat transfer method involves the transfer of heat via fluids and air, pushing heat to the next shrub during a fire?

    <p>Convection</p> Signup and view all the answers

    In terms of combustion complexity, what specific characteristic of wood influences the combustion stages and products?

    <p>Cellulose and lignin composition</p> Signup and view all the answers

    During wood combustion, what marks the stage when low temperatures lead to dehydration and pre-heating in the material?

    <p>Pre-ignition</p> Signup and view all the answers

    What is the main role of oxygen in combustion according to the text?

    <p>To facilitate the burning process</p> Signup and view all the answers

    Which component is highlighted as the source of heat to continue combustion according to the text?

    <p>Chain reaction</p> Signup and view all the answers

    What is the primary function of heat in combustion as described in the text?

    <p>To break down solids and liquids first into gases</p> Signup and view all the answers

    What is the critical impact of increasing the percentage of O2 in the atmosphere on combustion, as mentioned in the text?

    <p>Facilitates easier and hotter burning</p> Signup and view all the answers

    Which type of bond contains less potential energy and therefore releases less energy during combustion, according to the text?

    <p>O-H bonds</p> Signup and view all the answers

    What is the main reason why more O2 in a reaction leads to more heat produced during combustion?

    <p>More O2 breaking results in more energy absorbed</p> Signup and view all the answers

    During which phase of combustion does the thermal degradation of fuel into smaller components occur?

    <p>Pyrolysis</p> Signup and view all the answers

    What process involves taking a liquid and converting it into a gas stage during combustion?

    <p>Volatilization</p> Signup and view all the answers

    What distinguishes smoldering combustion from flaming combustion?

    <p>Combustion with not enough heat to maintain the process</p> Signup and view all the answers

    Why might live vegetation be less likely to burn compared to dead vegetation?

    <p>Live vegetation is denser and retains more moisture</p> Signup and view all the answers

    Why does wind play a role in reigniting combustion in the observed scenario?

    <p>Wind causes the flow of oxygen to create a flame</p> Signup and view all the answers

    What is the key characteristic that differentiates glowing combustion from smoldering combustion?

    <p>Absence of smoke and visible flame</p> Signup and view all the answers

    In wood combustion stages, what occurs after the material goes through pyrolysis?

    <p>Char combustion</p> Signup and view all the answers

    Which heat transfer method involves the movement of heat through contact and is highlighted as occurring below a flame?

    <p>Conduction</p> Signup and view all the answers

    What contributes to the slowing down of flames at the edge during a fire as mentioned in the text?

    <p>Higher moisture content</p> Signup and view all the answers

    Which part of the combustion process is influenced by the specific heats of different materials according to the text?

    <p>Pre-warming stage</p> Signup and view all the answers

    What precaution should you take when carrying tools, as mentioned in the text?

    <p>With sharp edges down</p> Signup and view all the answers

    What is the significance of the Pulaski tool in the context of wildland fire?

    <p>Used for chopping and scraping</p> Signup and view all the answers

    Why is it important to inspect tools regularly for damage?

    <p>To maintain their sharpness</p> Signup and view all the answers

    What is the primary purpose of using hand tools by wildland firefighters according to the text?

    <p>To create barriers to prevent fire from spreading</p> Signup and view all the answers

    Why do wildland firefighters wear PPE (Personal Protective Equipment) as mentioned in the text?

    <p>To prevent injuries from sharp tools and flying debris</p> Signup and view all the answers

    How do preferred hand tools differ regionally for wildland firefighters?

    <p>Based on the type of vegetation in different biomes</p> Signup and view all the answers

    What distinguishes the fire shovel from a regular shovel, according to the text?

    <p>The fire shovel has a steeper angle and sharper edges.</p> Signup and view all the answers

    Why should one be cautious when handling a rogue hoe, based on the text?

    <p>Rogue hoes have sharpened edges at the bottom and on the sides.</p> Signup and view all the answers

    Which tool mentioned in the text is primarily designed for smothering flames?

    <p>Flapper</p> Signup and view all the answers

    What is a key safety consideration highlighted in the text when carrying a fire shovel?

    <p>Keep the sharp edge away from your knee.</p> Signup and view all the answers

    What tool is specifically noted for being a combination of a hoe on one side and a pick on the other side?

    <p>Combi tool</p> Signup and view all the answers

    Which tool is described as having a giant sharp blade on one side and a rake on the other side?

    <p>McLeod</p> Signup and view all the answers

    What tool is named after the council tool company and known for its tooth-like sharp blades?

    <p>Council rake</p> Signup and view all the answers

    Which tool is specifically noted as not being fire-specific and made of plastic or wood?

    <p>Leaf rake</p> Signup and view all the answers

    Which equipment is described as a cheap and easy way to have great control over lighting fires?

    <p>Drip torches</p> Signup and view all the answers

    What piece of equipment features two main types: Panama and standard, with the Panama type having a longer wand for flinging fire further?

    <p>Drip torches</p> Signup and view all the answers

    What is the primary difference between primary and secondary succession in ecology?

    <p>Secondary succession occurs after a forest fire, while primary succession occurs with the colonization of barren land.</p> Signup and view all the answers

    Which component is NOT necessary for combustion based on the 'fire triangle' concept?

    <p>Water</p> Signup and view all the answers

    When considering the characteristics of combustion, how does it differ from rusting and decomposition?

    <p>Combustion involves a quick release of energy, while rusting and decomposition are slow processes.</p> Signup and view all the answers

    What is the primary source of energy release during combustion?

    <p>O=O bonds</p> Signup and view all the answers

    Which phase of combustion involves the thermal degradation of the fuel into gasses, tar, and char?

    <p>Pyrolysis</p> Signup and view all the answers

    In the context of fire spread and growth, which part moves fastest in the direction of the wind?

    <p>Head</p> Signup and view all the answers

    What method of heat transfer involves the movement of heat through contact and is highlighted as occurring below a flame?

    <p>Conduction</p> Signup and view all the answers

    What is the term used to describe the process of change in an ecosystem after a disturbance, as mentioned in the text?

    <p>Secondary succession</p> Signup and view all the answers

    Which of the following components is NOT a necessary part of the 'fire triangle' concept for combustion, as discussed in the text?

    <p>Light</p> Signup and view all the answers

    When was the first time fire and ecology were combined in a course, as credited to E.V. Komarek in the text?

    <p>1962</p> Signup and view all the answers

    During which phase of combustion does the thermal degradation of the fuel result in the production of gases, tar, and char?

    <p>Pyrolysis</p> Signup and view all the answers

    Which stage of wood combustion is characterized by low temperatures leading to dehydration and pre-heating in the material?

    <p>Stage 1: Dehydration</p> Signup and view all the answers

    What is the main source of heat transfer that involves movement through contact and is highlighted as occurring below a flame during combustion?

    <p>Conduction</p> Signup and view all the answers

    What part of a fire represents the fastest spreading direction when influenced by wind?

    <p>Head</p> Signup and view all the answers

    Study Notes

    Fire Ecology

    • The primary function of fire in ecology is to act as a natural disturbance that shapes ecosystems.

    Combustion Process

    • Fire differs from rusting and decomposition in terms of oxidation, as it involves a rapid oxidation process.
    • The removal of fire can act as a disturbance in an ecosystem.
    • Weak bonds, such as those found in wood, contain less potential energy and therefore release less energy during combustion.
    • The process of pyrolysis involves the thermal degradation of fuel into smaller components that eventually burn.
    • Heat is absorbed during the pyrolysis phase of combustion.
    • The smoldering phase marks the transition to combustion.
    • Smoldering combustion is characterized by a slow, low-temperature release of energy.
    • Flaming combustion does not have enough heat to maintain the combustion process.
    • Flaming combustion is differentiated from smoldering combustion by the presence of a flame.
    • The flame appears when the wind blows during combustion due to the increased oxygen supply.
    • Conduction is the type of heat transfer that occurs below a flame.
    • The first stage of wood combustion involves drying and pre-heating of the material.

    Wood Combustion

    • The cellulose component of wood affects the combustion process.
    • After char combustion, the material undergoes combustion in the presence of oxygen.
    • If the percentage of O2 in the atmosphere is less than 16%, combustion is not possible.
    • The pre-heating phase of combustion is responsible for drying the material before breakdown begins.
    • The main source of heat to continue combustion is the exothermic reaction of combustion.
    • Only certain materials, such as wood, create flames during combustion.

    Fire Characteristics

    • The primary role of oxygen in combustion is to provide the necessary oxidizer for the reaction.
    • Convection is the type of heat transfer that involves the transfer of heat via fluids and air, pushing heat to the next shrub during a fire.
    • The complexity of wood combustion is influenced by the specific characteristics of wood.
    • The stage of wood combustion involving the transition to flaming after pre-heating is characterized by high temperatures.

    Firefighting Tools

    • The Pulaski tool is a significant tool in wildland fire management.
    • Hand tools are used by wildland firefighters for various tasks, such as digging and extinguishing fires.
    • Wildland firefighters wear PPE (Personal Protective Equipment) for safety reasons.
    • The primary purpose of using hand tools is to control and extinguish fires.
    • The fire shovel is a tool specifically designed for smothering flames.

    Fire Spread and Growth

    • The primary source of energy release during combustion is the exothermic reaction of combustion.
    • The direction of the wind affects the spread and growth of fires.
    • Conduction is the method of heat transfer that involves the movement of heat through contact and is highlighted as occurring below a flame.
    • The term used to describe the process of change in an ecosystem after a disturbance is succession.
    • The primary difference between primary and secondary succession is the presence of a disturbance.

    Fire History

    • The idea of fire ecology became a recognized field of study in the mid-20th century.
    • E.V. Komarek is credited with combining fire and ecology in a course for the first time in 1962.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Fire 1.pdf - Fire Ecology
    Wildland Fire Tools PDF
    Fire In Ecology PDF

    Description

    Test your knowledge on the different stages of combustion: exothermic, flaming, smoldering, glowing, and extinction. Learn about the characteristics of each stage and what causes combustion to cease. Includes picture examples for better understanding.

    More Like This

    Stages of Combustion in SI Engines
    51 questions

    Combustion Stages in SI Engine: Detonation and More

    SprightlyVision avatar
    SprightlyVision
    Stages of Combustion in C.I Engines
    50 questions

    Stages of Combustion in C.I Engines

    SprightlyVision avatar
    SprightlyVision
    Fire Development Stages
    5 questions

    Fire Development Stages

    CharismaticHarmonica avatar
    CharismaticHarmonica
    NFI Core Review Class Flashcards
    31 questions

    NFI Core Review Class Flashcards

    SnappyPiccoloTrumpet avatar
    SnappyPiccoloTrumpet
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser