4AE3 U4 C4 Obj 1

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Questions and Answers

Which of the following is true about a reducing agent?

  • It continues to burn (correct)
  • It generates heat
  • It supplies oxygen
  • It is a spark or a match

What is the role of an oxidizing agent?

  • To continue burning
  • To supply oxygen (correct)
  • To maintain a high temperature
  • To generate heat

What can initiate the ignition of fuel?

  • Wet wood
  • A reducing agent
  • An oxidizing agent
  • Intense heat (correct)

Why is wet wood difficult to burn?

<p>The water in the wood converts to steam and draws heat away from the fire (C)</p> Signup and view all the answers

What happens if wood is too wet?

<p>It does not generate enough heat to sustain the chain reaction (A)</p> Signup and view all the answers

Which of the following is true about combustion?

<p>Combustion involves the oxidation of a fuel (B)</p> Signup and view all the answers

What are the four criteria that must be met for combustion to occur?

<p>Fuel, oxygen, ignition source, and heat (D)</p> Signup and view all the answers

Which of the following is true about reducing agents?

<p>Reducing agents are fuels (A)</p> Signup and view all the answers

What is the role of oxygen in combustion?

<p>Oxygen acts as an oxidizing agent (D)</p> Signup and view all the answers

What happens to the temperature during combustion?

<p>The temperature increases (C)</p> Signup and view all the answers

Which of the following is true about combustion?

<p>Combustion can only occur in the presence of oxygen. (B)</p> Signup and view all the answers

What are the four criteria that must be met for combustion to occur?

<p>Fuel, oxygen, ignition source, and heat (A)</p> Signup and view all the answers

What is the role of an oxidizing agent?

<p>To supply the oxygen for burning (C)</p> Signup and view all the answers

What can initiate the ignition of fuel?

<p>Heat (B)</p> Signup and view all the answers

What is the role of oxygen in combustion?

<p>To supply the oxygen for burning (B)</p> Signup and view all the answers

Which of the following is true about wet wood and combustion?

<p>Wet wood does not generate enough heat to sustain the chain reaction (D)</p> Signup and view all the answers

What is the role of a reducing agent in combustion?

<p>To provide fuel (C)</p> Signup and view all the answers

What is the role of an oxidizing agent in combustion?

<p>To supply oxygen (A)</p> Signup and view all the answers

Which of the following is true about the temperature during combustion?

<p>The temperature increases during combustion (A)</p> Signup and view all the answers

What must the fuel do to sustain a self-sustaining, uninhibited chain reaction?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following is NOT one of the four criteria that must be met for combustion to occur?

<p>The fire must be able to continue burning. (D)</p> Signup and view all the answers

What is the role of a reducing agent in combustion?

<p>To burn in the presence of an oxidizing agent. (B)</p> Signup and view all the answers

What is the role of an oxidizing agent in combustion?

<p>To supply the oxygen for burning. (A)</p> Signup and view all the answers

Which of the following is true about reducing agents?

<p>They contain enough oxygen in the fuel material itself for combustion to occur. (A)</p> Signup and view all the answers

What happens if wood is too wet?

<p>It is difficult to burn. (A)</p> Signup and view all the answers

Which of the following is true about wet wood and combustion?

<p>Wet wood draws heat away from the fire (A)</p> Signup and view all the answers

What happens if wood is too wet?

<p>The fire will go out (A)</p> Signup and view all the answers

What is the main role of an oxidizing agent in combustion?

<p>To supply oxygen (C)</p> Signup and view all the answers

What is the main role of a reducing agent in combustion?

<p>To initiate the ignition of fuel (B)</p> Signup and view all the answers

Which of the following is true about the temperature during combustion?

<p>The temperature increases during combustion (A)</p> Signup and view all the answers

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