- 1. The lowest temperature at which a product produces sufficient flammable vapour to produce sustained combustion after the removal of the primary source.
A) Fire Point
B) Flash Point
- 2. The lowest temperature at which a product produces enough vapour to produce a flash through the application of a small ignition source near the surface of the product. Specially to liquids, but it can also apply to some solid materials.
A) fire Point
B) Auto-Ignition Temperature
C) Flash Point
- 3. The temperature at which the material is heated to initiate sustained combustion, once ignited
A) Fire Point
B) Ignition Temperature
C) Fire Point
- 4. The temperature at which the heat evolved by a material decomposing under the influence of heat is sufficient to bring about combustion without the application of an external source of ignition.
A) Auto-Ignition Temperature
B) Flash Point
- 5. are the minimum and maximum concentrations of a gas or vapour in air which can be ignited and sustain a self-propagating flame.
A) Flammable limits
B) Auto-Ignition Temperature
- 6. the flammable vapour or gas/air mixture between the lower and upper flammable (explosive) limits
A) Flammable Range
B) Specific Gravity
- 7. Is the ratio of the weight of the material to the weight of the same volume of water.
A) Specific Gravity
B) Flammable Range
- 8. The term used to explain the weight of vapours is "vapour density." In order to measure the weight of these vapours, it compares them to air, which is considered to have a vapour density of 1.00. Therefore, if a substance has a vapour density of 1.5 it is one-and-a-half times as heavy as air under the same conditions of pressure and temperature. If a substance has a vapour density of 7 it is lighter than air. weighing only 7/10 as much as an equal volume of air.
A) Specific Gravity
B) Vapour Density
- 9. Is the weight of a volume of pure gas (with no air presenti compared with the weight of an equal volume of dry air at the same temperature and pressure
A) flash point
B) Vapour Density defined:
- 10. Petroleum products (consisting of many components, tach having a specific boiling point) do not have a specific boiling point, but have a boiling range. The lowest temperature in the boiling range is called the initial boiling point (IBP). The maximum temperature when a liquid is evaporated is the final boiling point (FBP).
A) fire point
B) Boiling Point
- 11. The lowest pressure at which a liquid at a give temperature in a closed container will remain in the liquid phase without evaporation
A) Vapour Pressure
B) Catalyst
- 12. are changes whereby energ (hear) is absorbed or is added before the reaction takes place.
A) Oxidation
B) Endothermic reaction
- 13. reactions or changes that release or give off energy (heat) thus they produce substances with less energy than the reactants
A) Combustion/flame
B) Exothermic reaction
- 14. a chemical change in which combustible material (fuel) and an oxidizing agent react
A) Oxidation
B) Endothermic reaction
- 15. the manifestation of fire when the fire is in its gas-phased combustion. A matter that is produced by fire
A) Oxidation
B) Combustion/flame
- 16. which of the following substance when added to a system will control the spread of reaction .
A) fire point
B) Catalyst
- 17. does not combine directly with oxygen in the burning process
A) Liquids
B) solid
- 18. is the highest possible value or the boundary that something cannot exceed. It represents the maximum amount, number, or level of something that is either possible or allowed, often by a rule, law, or decision.
A) Upper limits
B) liquid
- 19. define the range of concentrations within which a flammable substance can ignite and burn in a specific environment, typically air
A) Upper and lower flammable limits
B) upper limits
- 20. refers to the smallest possible value or quantity, representing the boundary on the lower side of something.
A) Lower limits
B) upper limits
- 21. This condition occurs when the temperature of a fuel is raised to its ignition temperature.
A) igniton
B) . Auto-ignition start
- 22. is a series of chemical reactions where the products of the reaction contribute to the reactants of another reaction
A) . Chemical chain reaction
B) combustible
- 23. when a substance loses electrons, gains oxygen, or loses hydrogen. It's the opposite of reduction, which involves gaining electrons. In chemical reactions, oxidation and reduction always occur simultaneously in what's called a redox reaction.
A) Oxidation takes place
B) ignition
- 24. is a colorless and non-flammable gas at normal temperature and pressure
A) lower limits
B) Carbon dioxide
- 25. is a type of foam that fire departments use to fight liquid-based fires (those started by oil, gasoline, or other flammable liquids). AFFF is highly concerning because it contains PFAS (per- and polyfluoroalkyl substances).
A) . AFFF
B) upper limits
- 26. A process that increases the temperature of a material without drawing heat from an outside source.
A) AFFF
B) . Spontaneous heating
- 27. refers to the process of initiating combustion or starting a fire.
A) solid
B) Ignition
- 28. refers to an electronic system that automatically ignites the fuel source without the need for a manual ignition source like a match or lighter
A) fire
B) Automatic ignition
- 29. The temperature at which enough vapour are given off to form an ignitable mixture with the air in the surface
A) fire
B) flash point
- 30. refers to the degree, volume, or magnitude of something, particularly when it's extreme or strong
A) ignition
B) Intensity
- 31. is an electronic system that automatically ignites the burner with a spark
A) ignition
B) Automatic ignition
- 32. The degree of heat necessary to ignite flammable vapours
A) . Ignition temperature
B) fire
- 33. occurs when a fuel source and oxidizer (like oxygen) react very rapidly, producing a sudden release of energy as heat, light, and sound
A) Explosive ignition
B) fire
- 34. Which of the following reasons why water is prohibited to quench Class D fires?
A) Class D fires reacts violently with water
B) . Water is not capable of extinguishing the fire
- 35. How do dry powder agents extinguish fires?
A) By keeping air from reaching the combustible metal
B) By dilution
- 36. In the fire classification system, gasoline is considered what class of fire?
A) Class B
B) Class D
- 37. What types of fire extinguishers usually work well on a Class B fire.
A) Dry powder and Dry chemical
B) Dry Chemical and Carbon dioxide
- 38. These are fluids that do not generate more than 40 pai when heated to 100 degrees F
A) Liquids
B) Gas
- 39. All materials, such as solids gases and liquids arecombustibles, depending on the temperature A product iscalled combustible when its flashpoinis 38 degrees C or higher
A) solid
B) Combustible Materials
- 40. The term oxidation refers to what action?
A) . chemical reaction of the three elements
B) the combination of substance with oxygen
- 41. It is the manifestation of fire when the fire is in its gas-phased combustion
A) flame
B) light
- 42. is a bright, yellow-orange flame that produces soot and emits visible light due to the incandescent heating of soot particle
A) light
B) luminous flame
- 43. is a type of flame characterized by its smooth, layered flow and well-defined flame front, where the combustion process occurs in a single, distinct region
A) flame
B) laminar flame
- 44. . The amount (expressed in percent) of fuel vapour that can be mixed with air to form an explosive or flammable mixture.
A) . Intensity
B) . Explosive limits
- 45. refers to its potential to cause harm or damage, considering the overall effects and potential for spread
A) magnitude" of a fire
B) intensity
- 46. The vapors from a flammable material with a vapour density of 0.3 would be expected to:
A) Dissipate completely
B) . Collect in high places
- 47. The vapors from a flammable material with a vapour density of 4 would be expected to:
A) Mix with air and be found at all levels
B) Collect in ground levels
- 48. Which of the following reasons why water should no be used on live electrical fire or equipment?
A) The expensive and sophisticated equipment may be ruined
B) It conducts electricity thereby endangering the firefighters
- 49. A condition or factor that governed the magnitude of fire
A) All of the above
B) . Degree of heat necessary to ignite combustibles
C) . Surface area of fuel expose to the air
D) Size of fire which governed by its intensity
- 50. EUROPEAN CLASSIFICATION OF FUELS Class A-Carbonaceous substances (solids) Class B-Liquids Class C-Gaseous Products Class D-Light Metals
A) walangsagot
B) b
- 51. U.S. CLASSIFICATION OF FUELS Class A-Carbonaceous substances (solids) Class B-Liquids and Gases Class C-Electrical Material Class D-Metals
A) wlagsagot
B) b
- 52. Materials involving vegetable fibres, wood, paper straw, grain, and grass; combustible minerals such as coal and coke. Nearly all thrash fires are considered as Class A.
A) Class f
B) Class A
- 53. this type of fire involves electrical motors electrical appliances and apparatus Actually a class C fire is composed usually of Class A and Class B materials or a combinations of both. Use of water is usually dangerous because of the risk of electrical shock
A) Class C
B) Class d
- 54. A materials that involves combustible metals, alloys, or metal compounds either in a solid, semi-solid or liquid state
A) Class D
B) Class E
- 55. Class of fire that was added to the NFPA portab extinguishers Standard in 1998, which is intended to extinguish kitchen fires.
A) Class K
B) . Class B
- 56. means any liquid having a flashpoint below 37.8 degrees C (100 degrees F) and having vapour pressure not exceeding 276 kpa (40 psig) at 37.8 degrees C (100 degrees F)
A) . Liquids and gases
B) flammable liquid
- 57. This product will immediately catch fire when ignited without raising its temperature
A) . Liquids and gases
B) Flammable materials
- 58. must be able to determine classification of a fire in order to selectne thethe best agent toapply and the best method of extinguishment to use
A) b
B) A firefighter
- 59. may present many fire combinations because all aircrafts use some kind of flammable fuel. With all the electrical equipment on board, an extra hazard of a Class B and Class C may be encountered. The danger of Class D fire will also be present because certain parts of the aircraft are made up of alloys such as aluminum, magnesium, and others that support combustion.
A) Aircraft fires or crashes
B) b
- 60. are fluids that do not generate more than 40 psia when heated to 100 degrees F (paia is pound-per-square inch absolute).
A) Liquids
B) jjjj
- 61. these are liquids with a flashpoint below 100 degrees F and a vapor pressure not over 40 psia at 100 F.
A) Flammable liquids
B) shjhjh
- 62. any liquid that has a flashpoint below 73 degrees F (22.8 degrees C, and a boiling point (BP) below 100 degrees F (37.8 degrees C
A) Class IA
B) jskhdjsh
- 63. any liquid that has a flashpoint below 73 degrees F (22.8 degrees C), and a boiling point at or above 100 degrees F (37.8 degrees C).
A) Class IB
B) dhhhhd
- 64. any liquid that has a flashpoint below 100 degrees F (37.8 C) but not below 73 degrees F (22.8 C
A) Class IC
B) hshsh
- 65. liquids that have a flashpoint at or above 100 degrees F (37.8 C
A) Combustible Liquids
B) hshhs
- 66. any liquid having a flashpoint at or above 100 degrees F (37.8 C) and below 140 degrees F (60 degrees C
A) Class II
B) jsgah
- 67. any liquid having a flashpoint at or above 60 degrees C (100 degrees F) and below 93.3 degrees C (200 degrees F
A) Class IIA
B) hggsd
- 68. - any liquid having a flashpoint at or above 140 degrees F (60 degrees C) and below 200 degrees F 193.3 degrees C
A) Class IIIA
B) jhjhsjxh
- 69. any liquid having a flashpoint at or above 93.3 degrees C (200 degrees F
A) shdsddy
B) Class IIIB
- 70. a reaction wherein water trapped at bottom of storage tanks vaporizes from heat expanding and expelling contents above it.
A) Slopover
B) d
- 71. A rupture of a vessel containing a liquid above normal atmospheric pressure boiling point may result explosive evaporation of a large part of its contents
A) BLEVE
B) dhghdg
- 72. chemical properties of gases are of prime interest to firefighters, as they reflect the ability of the as to react within it or with other materials.
A) v
B) Chemical Properties
- 73. any gas that which burn in normal concentrations of oxygen in the air. These gases are subjected to the same conditions as flammable vapors.
A) Flammable gases
B) jk
- 74. any gases that will not burn in air. Some of these will support combustion and are called oxidizers. Those that do not support combustion are called inert gases
A) jddk
B) Non-flammable gases
- 75. any gases that will react within itself or with other materials under conditions other than fire, i.e. shock, heat, and etc.
A) djshdhs
B) Reactive gases
- 76. any gases that may complicate firefighting efforts due to its serious life hazards.
A) Toxic gases
B) jdhsdhd
- 77. is the physical behaviour of a gas both outside and inside its container and when accidentally released, these are of prime interest to firefighters.
A) Physical Properties
B) gdgdydgyg
- 78. matter which is solely in a gaseous state in its container with a lower pressure limit of 25 psig (pounds per square inch gauge) at normal temperature of 70 degrees F to 100 degrees F.
A) sjhjhd
B) Compressed gases
- 79. matter which exist partly as a gas and partly as a liquid at normal temperatures inside the container and remain under pressure as long an any liquid is in the container.
A) Liquefied gases
B) jshjhd
- 80. are those which ignite burn and change chemically when subjected to heat or fire. The heat must be approximately 350 degrees For higher. Above this temperature, ordinary materials will give off enough vapors or gases to burn. Examples are wood, paper, and cloth
A) sjhsjh
B) combustibles solid
- 81. most of combustible metals are chemical elements which are part of earth's composition. Very few if any, are found in the natural state, as in gold. The pure metal is extracted from mineral ore deposits by chemical processes.
A) Combustible Metals
B) kksjkw
- 82. gas which remains as liquefied gas in its container at temperature far below normal temperature.
A) jhdsd
B) Cryogenic gase
- 83. gases which burn with air to produce heat, power, or light
A) dhshdg
B) Fuel gases
- 84. gases used in industrial processe such as: water treatment, welding and cutting refrigeration, and etc.
A) shghsgd
B) Industrial gases
- 85. gases used for medical purposes such as therapy and anesthesia.
A) . Medical gases
B) djshdjhdj
- 86. The most common flammable gas
A) Natural Gas
B) nsjhjsh
- 87. lighter than the air and not toxiclighter than the air and not toxic
A) Methane
B) jdhsjdh
- 88. colorless, tasteless, odorless, and not toxic heavier than air
A) Propane and Butane
B) njdshjh
- 89. colorless, tasteless, odorless shock sensitive burns ethylene 4217 degrees F
A) Acetylene
B) jshsh
- 90. difficult to keep in container lighter than air-extremely flammable
A) Hydrogen
B) jdhjdh
- 91. gas at room temperature extremely wide explosive range-3.0 to 100%
A) Ethylene Oxide
B) bhghg
- 92. can burn inside its own container
A) Oxidizer
B) sjh
- 93. most common does not burn 2 supports combustion
A) dshdhg
B) Oxygen
- 94. non-flammable-but does burn flammable range is less than 10% water soluble
A) hss
B) Ammonia
- 95. may be toxic when heated
A) Refrigerants
B) jd
- 96. Fluorine most powerful oxidizer, extremely toxic, extremely reactive, water reactive b) Chlorine-toxic, corrosive, irritating
A) dshj
B) Halogens
- 97. turn to acids when dissolved in water -toxic, corrosive, irritating
A) dhhd
B) Acid Gases
- 98. b) Nitrogen c) Argon d) Carbon dioxide e) Krypton Neon
A) Inert Gases
B) jhdsjds
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