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Quiz Session - Attempts With Random Questions

Firefighter I II Exam Questions

Page 10 of 50

181.

You are on the scene of a structure fire without occupants. The building owner informs your crew that there may be more than a 30 gallons of gasoline in 5-gallon containers for his lawn equipment and ATVs. At what temperature would you expect the gasoline to reach its flashpoint?

  • < 100 degrees Fahrenheit 

  • > 100 degrees Fahrenheit 

  • < 1,000 degrees Fahrenheit 

  • > 1,000 degrees Fahrenheit 

Correct answer: < 100 degrees Fahrenheit

Class B fires involve flammable and combustible liquids and gases. Flammable liquids have a flashpoint of less than (<) 100 degrees Fahrenheit (38 degrees Celsius). Flammable liquids include liquids such as gasoline and acetone.

Combustible liquids have a higher flashpoint than flammable liquids. Combustible liquids are seen in products such as vegetable oil and kerosene with a flashpoint of greater than (>) 100 degree Fahrenheit.

Flammable and combustible liquids have flashpoints just below and above 100 degrees Fahrenheit, not 1,000 degrees Fahrenheit. Temperatures just below or above 1,000 degrees Fahrenheit is the temperature range at which steel support structures used in building construction begin to buckle and fail. It is not the temperature range for flammable or combustible liquids to reach their flashpoints.

182.

Combustion occurs when the three parts of the fire triangle are present. Combustion is a complex chemical reaction that can occur in several forms. Which of the following is considered one of the modes of combustion?

  • Flaming combustion

  • Rapid combustion

  • System combustion

  • Overt combustion

Correct answer: Flaming combustion

Combustion modes can be described as flaming and non-flaming. Flaming combustion is referred to as fire and produces visible light, heat, and gases. Non-flaming combustion usually occurs more slowly without any visible light.

Rapid combustion describes the speed with which the process of combustion happens on a substance.

Overt combustion and system combustion are not terms used to describe the modes of combustion.

183.

A36 steel is the most commonly used structural steel in the United States. Other steels reflect a similar pattern to A36 when exposed to temperatures normally found in structural fires. At what temperature does A36 steel begin to lose its strength when exposed to fire?

  • 570 degrees Fahrenheit 

  • 550 degrees Fahrenheit 

  • 2,000 degrees Fahrenheit

  • 2,250 degrees Fahrenheit

Correct answer: 570 degrees Fahrenheit

From a firefighting perspective, you must consider the type of steel used in the members of the structure when trying to determine when the steel may begin to fail. Steel begins to lose its strength at around 570 degrees F. (300 degrees C).  At this point, the steel will only support 40 percent or less of its deigned load and could fail at any given time after flashover.

Steel beams do not begin to lose their load bearing capacity at temperatures below 570 degrees Fahrenheit. At temperatures above 1,000 degrees F, steel beams will have likely begun to buckle and collapse due to excessive heat.

184.

What is the vapor density and ignition temperature for methane?

  • 0.55 and 1004°F

  • 1.52 and 842°F

  • 0.96 and 1128°F

  • 1.00 and 750°F

Correct answer: 0.55 and 1004°F

The vapor density for methane is 0.55, and the ignition temperature for methane is 1004°F. Methane is also known as natural gas.

The vapor density for propane is 1.52, and the ignition temperature for propane is 842°F. The vapor density for carbon monoxide is 0.96, and the ignition temperature for carbon monoxide is 1128°F. The vapor density of 1.00, and the ignition temperature of 750°F are not characteristics associated with common flammable gases.

185.

What hazard does a Level A ensemble protect against that Level B ensemble will not be as effective in protecting from?

  • Protection against vapor, gases, mists, and particles

  • Protection against hazardous chemical splashes

  • Protection against fire and fire gases

  • Protection against falling debris 

Correct answer: Protection against vapor, gases, mists, and particles

Level A ensemble provides the highest level of protection against vapors, gases, mists, and particles for the respiratory tract, eyes, and skin.

186.

Due to the carcinogens present in all fires, firefighters are at a greater risk for certain types of cancer. Which of the following is not a type of cancer that firefighters are at a greater risk for?

  • Lung cancer

  • Testicular cancer

  • Prostate cancer

  • Non-Hodgkin’s lymphoma

Correct answer: Lung cancer

Lung cancer is not a type of cancer that firefighters are at a greater risk for.

Firefighters are at a greater risk of developing testicular cancer, prostate cancer, and non-Hodgkin’s lymphoma due to the carcinogens present in all fires. Myeloma is another type of cancer that firefighters are at a greater risk for. To protect against the threat of cancer, firefighters should always wear the proper protective equipment designated by their department’s safety policies.

187.

Often, evidence at a fire scene is destroyed, damaged, altered, or otherwise not preserved by firefighters who have the responsibility to preserve the evidence. This occurs when the movement, change, or alteration of the evidence prevents an investigator from obtaining evidentiary, interpretive, or analytical value from the evidence. The term which best describes this is which of the following?

  • Spoliation

  • Spoilage

  • Negation

  • Defamation

Correct answer: Spoliation

Spoliation can be either intentional or unintentional but has the same effect of negating the value of the evidence in a legal proceeding.  

Spoilage, negation, and defamation are not terms used in the fire service to describe these situations.

188.

What is the advantage of communications systems that use repeaters?

  • Repeaters enable the transmission to reach a wider coverage area 

  • Repeaters ensure receipt of a message

  • Repeaters enable voice recording technology to automatically repeat last message

  • Repeaters extend capability of first responders 

Correct answer: Repeaters enable the transmission to reach a wider coverage area

The advantage of communications systems that use repeaters is that repeaters enable the transmission to reach a wider coverage area.

189.

How can a building's HVAC system affect fire spread?

  • HVAC systems can spread fire throughout a building by moving heated gases and air into uninvolved compartments of the building until those materials ignite

  • All HVAC systems will always automatically shut off when a fire is detected

  • HVAC systems will choke off the fire by only moving cool air into the fire room(s)

  • HVAC systems will automatically ventilate the structure before the fire department's arrival on the scene

Correct answer: HVAC systems can spread fire throughout a building by moving heated gases and air into uninvolved compartments of the building until those materials ignite

Heating, Ventilation, and Air Conditioning (HVAC) systems in a building can affect tactical ventilation operations during a structural fire. These systems move air (heated or cooled) throughout a structure through a series of ducts. During a structural fire, these same ducts can move heated air and products of combustion from an involved compartment to other compartments within the structure.

190.

After a large commercial fire that you found suspicious, which of the following is true about your observations at the fire scene?

  • You can keep a written record of what you observed at the scene

  • Any written record you make about a fire is personal information and may not be used in court

  • You can speak to the public or the property owner about what you observed at the fire

  • You do not need to tell the investigator your suspicions or observations about the fire

Correct answer: You can keep a written record of what you observed at the scene

The fire investigator or an attorney involved in the case can request any written report or record you have kept about the fire.

You should never speak to anyone about what you observed at the scene. Only an official fire department spokesperson should make statements.

If you have suspicions about the fire or have observed unusual circumstances, you should tell the fire investigator this information.

191.

Which of the following is not a route of exposure?

  • Occular entry

  • Injection

  • Absorption

  • Inhalation

Correct answer: Occular entry

Occular entry is not a route of exposure.

Routes of Entry/Exposure are:

  • Inhalation
  • Ingestion
  • Absorption
  • Injection

192.

In a controlled environment, fires progress through four stages. Which of the following represents the appropriate order of the four fire stages?

  • Incipient, growth, fully developed, and decay

  • Growth, incipient, fully developed, and decay

  • Growth, fully developed, incipient, and decay

  • Incipient, fully developed, growth, and decay

Correct answer: Incipient, growth, fully developed, and decay

In controlled environments, such as laboratories, fires progress through the following four stages: incipient, growth, fully developed, and decay. When a fire occurs outside of a controlled environment, the stages may be in a different order or may not develop through each stage. The factors that affect fire development are fuel type, availability of additional fuels, compartment volume and ceiling height, ventilation, thermal properties, ambient conditions, and fuel load.

The other options are incorrect because they do not properly list the four stages of fire in their appropriate order.

193.

An automatic sprinkler kit is used to stop an open sprinkler’s water flow. All except which of the following items are recommended for an automatic sprinkler kit?

  • Sprinkler hose lines

  • Sprinkler tongs

  • Sprinkler stoppers

  • Sprinkler wedges

Correct answer: Sprinkler hose lines

Sprinkler hose lines are not recommended for an automatic sprinkler kit.

The items recommended for an automatic sprinkler kit are sprinkler tongs, sprinkler stoppers, and sprinkler wedges. Catchalls, chutes, and hose lines can be used to direct the water from sprinklers out a door or window until the sprinkler water flow stops.

194.

When performing service hose testing, it is recommended that all personnel wear what parts of their PPE during the testing procedures?

  • Helmet

  • Full PPE

  • SCBA

  • Gloves

Correct answer: Helmet

It is recommended that, at a minimum, firefighters wear their protective helmet when service testing fire hose.

It is not recommended that personnel wear full PPE or SCBA when service testing fire hose.  

Gloves should be worn but are not part of the recommendations for fire service personnel while service testing hose.

195.

In order to avoid injury or death, a firefighter should remember which of the following regarding hybrid or electric cars? 

  • Orange color-coded cables carry high-voltage that can cause electrocution

  • Hydraulic systems can explode when exposed to heat

  • Multiple fuel cells or large-capacity fuel cells could exist

  • Doorposts can explode if they are cut

Correct answer: Orange color-coded cables carry high-voltage that can cause electrocution

Orange color-coded cables in hybrid and electric vehicles carry high-voltage electricity, posing a serious electrocution hazard to firefighters. These cables are often located under the vehicle or along the frame. Awareness of this hazard is crucial when extricating victims or dealing with vehicle fires, as cutting into these cables can result in severe injury or death.

Hydraulic systems on vehicles, such as those in dump trucks or garbage trucks, can explode if exposed to extreme heat. However, this is more relevant to heavy machinery and does not apply to hybrid or electric vehicles. 

While some vehicles may have multiple or large-capacity fuel cells, hybrid and electric cars primarily rely on electric power, making this option irrelevant in this context. 

Doorposts, especially in vehicles with pre-tensioner seat belt systems, can present explosive hazards if cut, but this is unrelated to dangers specific to hybrid or electric vehicles.

196.

When should you complete a SCBA inspection?

  • After each use

  • Monthly

  • Annually

  • Third Sunday of every month

Correct answer: After each use

SCBA inspections should be performed after every use to ensure that the equipment remains in good working condition and ready for the next operation. This includes checking for damage, wear, and air supply levels, as the SCBA is critical to a firefighter's safety in hazardous environments.

Monthly inspections are also important for routine checks, but they do not replace inspections after each use. Annual inspections are conducted by qualified personnel to ensure all components meet safety standards but are not frequent enough to ensure ongoing safety after every use. Inspections based on specific days, such as the third Sunday of the month, are arbitrary and not aligned with best practices for firefighter safety and equipment maintenance.

197.

One of the greatest dangers in responding to fires involving pressurized vessels is to find a tank on which fire is directly impinging on the tank itself. This can cause a situation in which the liquid inside the confined space reaches the point that it exceeds the structural capacity of the tank to hold the pressure. If the contents of the tank are flammable, the resulting release can result in what?

  • BLEVE

  • BLOOM

  • EVACT

  • REVEC

Correct answer: BLEVE

A BLEVE or boiling liquid expanding vapor explosion is the result of a pressure vessel being heated to the point that the flammable liquid inside reaches its boiling point, and the pressure inside the tank exceeding the structural capacity of the tank to hold the pressure. The resulting almost instantaneous release of the pressure results in a rapidly expanding cloud of flammable vapor that ignites explosively as it expands and can engulf fire fighting personnel and equipment.

BLOOM, EVACT, REVEC are not terms or acronyms used to describe this situation.

198.

A structure fire results in primary and secondary damage. All except which of the following are examples of secondary damage?

  • Damage caused by smoke

  • Damage caused by weather after fire suppression

  • Damage caused by ventilation operations during fire suppression

  • Damage caused by forcible entry

Correct answer: Damage caused by smoke

Damage caused by smoke is an example of primary structure damage, not secondary damage.

Secondary damage results from fire suppression activities or damage that occurs after fire suppression such as damage caused by weather after fire suppression, by ventilation operations during fire suppression, or by forcible entry.

199.

The Emergency Response Guidebook (ERG) contains orange pages representing the Initial Action Guides. These guides are all divided into three sections, which include all except which of the following?

  • Protective Action

  • Potential Hazards

  • Public Safety

  • Emergency Response

Correct answer: Protective Action

The Initial Action Guides do not contain a Protection Action section. The green pages of the ERG contain the Table of Initial Isolation and Protection Action Distances.

The Initial Action Guides located in the orange pages of the ERG are divided into the following sections: Potential Hazards, Public Safety, and Emergency Response. The guides are presented in a two-page format, and each covers a group of materials that have similar characteristics.

200.

Which of the following terms is defined as a heat source with sufficient temperature, energy, and duration of contact with the fuel to raise the fuel's temperature to its ignition temperature?

  • Competent ignition source

  • Ignition sequence

  • Igniter

  • Confluent ignition process

Correct answer: Competent ignition source

The competent ignition source points to the material that was first ignited and the action that brought together this fuel and the source of ignition. This is often referred to as the ignition sequence.

The ignition sequence describes the process that brought the competent ignition source into contact with the fuel.

An igniter is a mechanical device used to initiate an ignition.

Confluent ignition process is not a term used in the fire service.

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