CDI - 5 - Quiz
  • 1. During a fire investigation, officers identify a material that reacts with oxygen and produces flames. What is this substance called?
A) Heat
B) Oxygen
C) Fuel
D) Smoke
  • 2. It refers to the chemical process whereby fire consumes the most solid part of the fuel, what is it?
A) Combustible Vapors
B) Pyrolysis
C) Embers
D) Free Radicals
  • 3. In a fire safety lecture, the instructor shows a diagram representing oxygen, heat, and fuel. What is this diagram called?
A) Triangle of Fire
B) Fire Triangle Theory
C) Tetrahedron of Fire
D) Fire Tetrahedron
  • 4. A liquid gives off vapors that ignite momentarily when exposed to flame but do not sustain burning.
    What temperature condition does this describe?
A) Fire Point
B) Vapor Density
C) Temperature
D) Flashpoint
  • 5. What is the weight of air?
A) 1.01
B) 0.01
C) .7
D) 1.00
  • 6. The following are an example of products of combustion except:?
A) Flame
B) Embers
C) Smoke
D) Heat
  • 7. This type of combustion is ignited or took form of embers, what is this?
A) Glowing Combustion
B) Surface or Smoldering Combustion
C) Flaming Combustion
D) Gas-phased Combustion
  • 8. A fire starts when a match is struck and reacts quickly with the air. What do you call this rapid chemical reaction?
A) Inhibition
B) Fire
C) Chemical Reaction
D) Chemical Reactivity
  • 9. In a classroom discussion about air composition, which of the following is NOT a correct component of air?
A) 1% of other gases
B) 21% normal oxygen
C) 78% of Nitrogen
D) 78% Hydrogen gas
  • 10. During a fire, heat is released continuously, allowing the fire to spread to nearby materials. Which chemical property explains this release of heat?
A) Vaporization
B) Condensation
C) Endothermic reaction
D) Exothermic reaction
  • 11. In flaming mode, how hot the temperature can go?
A) 1,000-1,125 degrees Celsius
B) 38-100 degrees Celsius
C) 1,000-1,500 degrees Celsius
D) 400-600 degrees Celsius
  • 12. A firefighter feels the warmth coming from the burning materials during a fire. What form of energy is being experienced that can be measured by temperature?
A) Heat
B) Oxygen
C) Fuel
D) Combustion
  • 13. Fire occurs when a fuel chemically reacts with oxygen, producing heat What chemical process is responsible for this reaction?
A) Endothermic reaction
B) Vapor Density
C) Specific gravity
D) Oxidation
  • 14. While studying fire behavior, a student lists the elements needed for fire. Which of the following is
    NOT an element of fire?
A) Free Radicals
B) Fuel
C) Heat
D) Oxygen
  • 15. During a fire investigation, the officer identifies a gas in the air that supports burning and has no color or smell. What gas is this?
A) Carbon Dioxide
B) Free Radicals
C) Smoke
D) Oxygen
  • 16. What is radiation?
A) Transmission of heat through explosions
B) Transmission of heat through an object or conductor
C) Transmission of heat through space only
D) Transmission of heat through moving liquids
  • 17. According to Felipe G. Montojo (2006), which stage of fire shows no visible smoke, flame, or sufficient heat?
A) Smoldering Stage
B) Flame Stage
C) Heat or Explosion Stage
D) Incipient Stage
  • 18. Which stage is considered out of control once reached?
A) Ignition Stage
B) Heat/Conflagration/Explosion Stage
C) Incipient Stage
D) Smoke Stage
  • 19. What is FLASHOVER?
A) Sudden ignition of all combustible materials in a compartment
B) Extinguishment of fire by lack of oxygen
C) A slow-burning fire without flames
D) Ignition of smoke outside the building
  • 20. What is convection?
A) Air or space
B) Transmission of heat by moving currents of liquid or gas
C) Transmission of heat through solid objects
D) Transmission of heat through direct flames only
  • 21. Which phase of fire is the initial stage where combustion begins and the fire is small and confined to the fuel first ignited?
A) Smoldering Phase
B) Free-Burning Phase
C) Decay Phase
D) Incipient / Ignition / Beginning Phase
  • 22. Which two modes of heat transfer explain fire spread through a heated metal pipe and the movement of hot smoke along the ceiling?
A) Conduction and convection
B) Conduction and Flame Contact
C) Convection and radiation
D) Conduction and Radiation
  • 23. Radiation can cause another flammable object to ignite through:
A) Transmission of heat through solid objects
B) Air or space
C) Transmission of heat through direct flames only
D) Transmission of heat by moving currents of liquid or gas
  • 24. During a fire, heat is released continuously, allowing the fire to spread to nearby materials. Which chemical property explains this release of heat?
A) Endothermic reaction
B) Vaporization
C) Condensation
D) Exothermic reaction
  • 25. Which phase of fire is the initial stage where combustion begins and the fire is small and confined to the fuel first ignited?
A) Incipient / Ignition / Beginning Phase
B) Smoldering Phase
C) Decay Phase
D) Free-Burning Phase
  • 26. What is ROLLOVER or FLAMEOVER?
A) Ignition of unburned gases in the smoke layer near the ceiling
B) Burning of only solid materials
C) Sudden ignition of all combustible materials in a compartment
D) Sudden cooling of fire
  • 27. Which stage of fire is considered out of control and may involve conflagration or explosion?
A) Heat, Conflagration, or Explosion Stage
B) Incipient Stage
C) Flame stage
D) Smoldering Stage
  • 28. In which stage are flames noticeable and smoke decreases as heat increases?
A) Flame Stage
B) Decay Stage
C) Smoke Stage
D) Incipient Stage
  • 29. What is conduction?
A) Transmission of heat through explosions
B) Transmission of heat through an object or conductor
C) Transmission of heat through space only
D) Transmission of heat through moving liquids
  • 30. Which two modes of heat transfer explain fire spread through the conatct of the gas lamp to the curtain and due to the exothermic reaction of the fire?
A) Flame Contact and Conduction
B) Flame contact Only
C) Flame Contact and convection
D) Flame Contact and radiation
  • 31. What are the recommended agents to extinguish Class A Fires?
A) Water Only
B) Dry Chemical, CO2
C) Foam, Dry Chemical, CO2
D) Water, Foam, Dry Chemical
  • 32. What law repealed Presidential Decree No. 1185?
A) Republic Act No. 10175
B) Republic Act No. 1613
C) Republic Act No. 9514
D) Republic Act No. 9003
  • 33. Which extinguishing agents are commonly used for smothering?
A) Water and sand
B) Dry leaves and soil
C) Steam and gasoline
D) CO2 and AFFF
  • 34. Which method works by interrupting the chemical reaction of fire?
A) Cooling
B) Separation
C) Inhibition
D) Smothering
  • 35. Why is water dangerous to use on Class C fires?
A) It creates strong odors
B) It increases smoke
C) It changes the color of flames
D) It may cause electrical shock
  • 36. What method of fire extinguishment removes the fuel source?
A) Smothering
B) Cooling
C) Inhibition
D) Separation
  • 37. The following are examples of Extinguishing agents, except?
A) Oxygen
B) Water
C) Co2
D) Dry Chemical
  • 38. A sign reading "WARNING: THIS BUILDING IS A FIRE HAZARD" is posted. Why?
A) Firetrap
B) Non-compliance with fire safety
C) Closure due to violation
D) Abatement of hazard
  • 39. Fire Personnels conduct Fire Drill and symposium to educate residents. What principle ist this?
A) Fire Prevention
B) Fire Protection
C) Fire Hazard
D) Fire Control
  • 40. What method of extinguishment removes oxygen from the fuel?
A) Smothering
B) Separation
C) Inhibition
D) Cooling
  • 41. Which method of fire extinguishment uses heat absorption?
A) Smothering
B) Separation
C) Inhibition
D) Cooling
  • 42. Fires involving gasoline, oils, and petroleum products are classified as:
A) Class C
B) Class D
C) Class B
D) Class A
  • 43. What is the best general cooling agent for firefighting purposes?
A) Water
B) Foam
C) Sand
D) Carbon dioxide
  • 44. Smothering, Cooling and Separation is an example of?
A) Fire Prevention
B) Fire Protection
C) Fire Hazard
D) Fire Suppression
  • 45. Cooling is commonly used on what type of fire?
A) Class K
B) Class A
C) Class C
D) Class D
  • 46. Which phase of fire is characterized by the cessation of flames but the presence of dense smoke and high heat in a confined area?
A) Growth Phase
B) Incipient Phase
C) Flashpoint
D) Smoldering Phase
  • 47. What do we call the systematic and scientific examination of a fire incident?
A) Fire Research
B) Fire Investigation
C) Fire Origin
D) Crime Scene Investigation
  • 48. A fire set by an offender causes a person to die.
    What applies?
A) Arson with Homicide
B) Arson
C) Arson with Murder
D) Accident
  • 49. Before the fire started, the owner secretly removed expensive appliances from the building. What may this indicate?
A) Corpus Delicti
B) Evidence of intent
C) Modus Operandi
D) Heroism
  • 50. The BFP finds a fire hazard and issues a notice to fix it within 10-15 days. What is this action called?
A) Evacuation order
B) Abatement
C) Notice of Closure
D) Notice to Comply
  • 51. Fire investigators examined the bottoms of tables and chairs inside a burned room. What was the purpose?
A) Exposure to intense heat near the origin
B) To determine the level of fire origin
C) To estimate approximate fire progression
D) It may indicate the point of origin
  • 52. Fire in a metal exhaust duct in one room heats the metal, and the heat travels along the duct, igniting insulation in another room without flames passing through. Which heat transfer mode is responsible?
A) Conduction
B) Flame contact
C) Convection
D) Radiation
  • 53. Investigators noticed that flames and smoke spread upward from one corner of a room. What type of fire pattern is this?
A) Movement pattern
B) Intensity pattern
C) Electrical pattern
D) Mechanical pattern
  • 54. An employee burned his workplace because he was angry at his employer. What kind of motive is present?
A) Accident
B) Self-defense
C) Jealousy
D) Grievance
  • 55. A stack of wooden pallets and cardboard boxes in a warehouse catches fire. By fuel, what class is this?
A) Class D
B) Class A
C) Class B
D) Class C
  • 56. Which stage of fire is considered out of control and may involve conflagration or explosion?
A) Smoldering Stage
B) Free-burning Stage
C) Boiling Point
D) Heat, Conflagration, or Explosion Stage
  • 57. Firefighters found multiple points of origin inside a building. What does this indicate?
A) Lack of oxygen
B) Natural fire spread
C) Electrical overload only
D) Intentional fire setting
  • 58. A worker accidentally started a fire while using welding equipment in a factory. What type of fire cause is involved?
A) Unknown Fire
B) Accidental fire
C) Natural fire
D) Arson
  • 59. Investigators discovered gasoline poured around a building before the fire started. What type of fire is most likely involved?
A) Accidental Fire
B) Natural Fire
C) Arson
D) Unknown fire
  • 60. An investigator studies the speed at which a fire spread inside a building. What is he determining?
A) Fire behavior
B) Fire origin
C) Fire Traces
D) Fire dancing
  • 61. A man burns his neighbor's house out of anger.
    What crime is committed?
A) Burning of Property
B) Arson
C) Theft
D) Negligence OF Fire Hazard
  • 62. Flames from a burning house ignite a neighboring house across a narrow street even though the flames never physically touch it. Which heat transfer mechanism mainly caused the second structure to ignite?
A) Flame contact
B) Convection
C) Radiation
D) Conduction
  • 63. In a fire safety lecture, the instructor shows a diagram representing oxygen, heat, and fuel. What is this diagram called?
A) Tetrahedron of Fire
B) Fire Triangle Theory
C) Fire Tetrahedron
D) Triangle Fire Theory
  • 64. While examining the exterior of a burned house, investigators found footprints near a broken window. What may this indicate?
A) Possible point of entry
B) Electrical malfunction
C) Natural fire spread
D) Fire suppression activity
  • 65. A fire in one room directly touches a wooden door, heating it until it ignites. What is the primary method of heat transfer from the flame to the door surface?
A) Conduction
B) Convection
C) Radiation
D) Flame contact
  • 66. Which extinguishing agent is most suitable for an energized electrical equipment fire while minimizing damage to sensitive equipment?
A) Dry chemical with heavy particulate
B) CO₂ for smothering without residue
C) Water spray for maximum cooling
D) AFFF foam blanket over electronics
  • 67. A fire investigator discovered that the fibers of a wooden wall were decomposed and changed after a fire incident. Which element of arson is present?
A) Malice
B) Intent
C) Burning
D) Motive
  • 68. During a fire investigation, the investigator wore gloves, boots, and coveralls before entering the scene. Why?
A) To increase fire intensity
B) To protect the investigator and preserve evidence
C) To identify the owner of the building
D) To clean the fire scene faster
  • 69. An electric clock stopped at 2:15 AM during a fire. Investigators compared this time with the alarm report. Why?
A) To replace the clock
B) To identify the building owner
C) To estimate approximate fire progression
D) To determine weather conditions
  • 70. Investigators noticed a strong kerosene odor inside a burned house. What does this suggest?
A) Faulty Wiring
B) Natural combustion
C) Possible arson
D) Self-ignition of flammable liquids
  • 71. Which two modes of heat transfer explain fire spread through a heated metal pipe and the movement of hot smoke along the ceiling?
A) Radiation and flame contact
B) Convection and oxidation
C) Conduction and convection
D) Conduction and radiation
  • 72. Which must first be proven in arson investigation?
A) A fire actually occurred
B) There is a solid motive behind the act
C) Insurance was claimed
D) The suspect confessed
  • 73. A building owner is given time to correct a violation after inspection. What is issued?
A) Order to Comply
B) FSIC
C) Alarm notice
D) Evaluation
  • 74. A suspect intentionally burned a store to collect insurance money. What classification of fire is involved?
A) Innocent fire
B) Incendiary fire
C) Unknown Fire
D) fire Natural
  • 75. A suspect burned a store because he wanted revenge against the owner. What element of arson is illustrated?
A) Criminal design
B) Corpus Delicti
C) Burning
D) Malice
  • 76. The following are an example of products of combustion, EXCEPT?
A) Smoke
B) Embers
C) Heat
D) Flame
  • 77. Which firefighting tactic helps reduce the danger of backdraft before entry is made?
A) Exhaust fan
B) Horizontal Ventilation
C) Fan
D) Vertical Ventilation
  • 78. During interior examination, investigators checked the depth of wood char near a burned sofa. Why?
A) To identify building materials
B) To estimate fire duration and point of origin
C) To extinguish remaining flames
D) To determine ownership of the sofa
  • 79. The following terminology are used in the Fire Code, EXCEPT:
A) Arson
B) Distillation
C) Abatement
D) Fulminate
  • 80. While examining debris, investigators removed burned materials layer by layer until reaching the floor. Why?
A) Direction and point of fire origin
B) To estimate approximate fire progression
C) To determine the level of fire origin
D) To locate hidden evidence and burn patterns
  • 81. Which law in the Philippines is known as the Anti-Arson Law?
A) Presidential Decree No. 1175
B) Presidential Decree No. 1316
C) Presidential Decree No. 1613
D) Presidential Decree No. 1616
  • 82. During a fire scene examination, investigators carefully sifted through the burned remains of furniture and roofing materials to locate evidence. What were they examining?
A) Exterior
B) Furnishing
C) Debris
D) Interior
  • 83. During a thunderstorm, lightning strikes a tree beside a wooden house, and the house catches fire. How should this fire be classified based on cause?
A) Natural fire
B) Electrical fire
C) Accidental Fire
D) Home fire
  • 84. Before collecting evidence, investigators first photographed the fire scene. Why is this important?
A) To clean the scene faster
B) To preserve the original condition of evidence
C) To estimate property value
D) To interview witnesses
  • 85. Investigators observed unusual burn patterns shaped like liquid spills near the entrance of a building. What may this suggest?
A) Water damage only
B) Mechanical malfunction
C) Normal fire spread
D) Use of flammable liquid accelerants
  • 86. Fire investigators classified a fire caused by faulty wiring as what type of fire?
A) Unknown Fire
B) Natural fire
C) Incendiary fire
D) Innocent fire
  • 87. The fact that a crime has been committed is called:
A) Modus Operandi
B) Corpus Delicti
C) Prima Facie
D) Criminal Intent
  • 88. Investigators identified the room with the heaviest fire damage. Why is this important?
A) It may indicate the point of origin
B) It measures smoke odor
C) It determines property ownership
D) It identifies the oldest room
  • 89. Which is considered a "fingerprint of fire"?
A) Fire Origin
B) Burn patterns
C) Smoke
D) Pattern
  • 90. A power surge travels through building wiring, causing multiple appliances to burn out and one to ignite. What classification of fire does it imply?
A) Incendiary Fire
B) Unknown Fire
C) Accidental Fire
D) Innocent Fire
  • 91. During a thunderstorm, a warehouse caught fire after being struck by lightning. What type of fire cause is this?
A) Unknown fire
B) Natural fire
C) Accidental fire
D) Arson
  • 92. An overloaded extension cord under a carpet overheats and ignites the carpet. How is this fire best classified based on cause?
A) Intentional Fire
B) Accidental fire - purely accidental cause
C) Flame Fire
D) Accidental fire - electrical accident
  • 93. Heavy, pressurized dark smoke pushes through wall cracks in a locked room. What phenomenon threatens firefighters if they open the door without venting?
A) Rollover
B) Backdraft
C) Flashover
D) None of these
  • 94. A building inspector finds the main exit doors swinging inward instead of outward. What document should the BFP issue first?
A) Closure Order
B) Abatement Order
C) Notice to Comply
D) FSIC
  • 95. Deep, shiny alligatoring is found concentrated near the floor of a burned living room. What does this indicate?
A) Chemical treatment
B) Roof origin
C) Lightning strike
D) Point of origin
  • 96. What must be established to prove the corpus delicti in an arson case?
A) Eyewitness statement
B) Fact of fire and criminal intent/agency
C) Insurance policy value
D) Owner's debts
  • 97. When sketching a fire scene using triangulation, measurements must be taken from:
A) The room center
B) Paces from the door
C) Temporary furniture
D) Two permanent, fixed reference points
  • 98. When investigating a fire scene, how should investigators process the area?
A) From least burn damage toward greatest burn damage
B) From roof to basement
C) From most damage to least damage
D) Randomly inward
  • 99. What does a smooth, round, shiny arc bead on a copper wire typically indicate?
A) Mechanical cutting
B) Primary arcing fault as the fire cause
C) Secondary arcing from external fire heat
D) Chemical corrosion
  • 100. An investigator finds a burnt floorboard with a distinct, elongated trail pattern that smells strongly of kerosene. What is this physical evidence called?
A) Trailer
B) Accelerant
C) Plant
D) V-pattern
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