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NEW QUESTION # 45
What is the largest water droplet that could be sustained in a highly turbulent fire environment?
- A. 1000 microns
- B. 2500 microns
- C. 2000 microns
- D. 1500 microns
Answer: C
NEW QUESTION # 46
Dipping and coating processes should be separated from other operations, materials, or occupancies by location, fire walls, or
- A. process systems.
- B. fire partitions.
- C. operational procedures.
- D. exhaust systems
Answer: C
Explanation:
Dipping and coating processes using flammable or combustible liquids pose a significant fire and explosion hazard and should be isolated from other operations, materials, or occupancies by location, fire walls, or operational procedures. Location refers to the physical separation of the process from other areas by distance or barriers. Fire walls are fire-resistance-rated assemblies that prevent the spread of fire from one side to the other. Operational procedures are rules or guidelines that regulate the conduct of the process and its personnel, such as limiting the amount of flammable or combustible liquids in use, controlling ignition sources, and providing adequate ventilation.
Reference:
1: NFPA 34: Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids 2: Fire Protection Handbook, 20th Edition, Volume 1, Chapter 8
NEW QUESTION # 47
Compressed gas cylinders for breathing air are regulated in the United States by:
- A. NIOSH
- B. DOT
- C. ANSI
- D. OSHA
Answer: B
Explanation:
Breathing Air Cylinder U.S. Department of Transportation (DOT) Regulations Compressed gas cylinders for breathing air are regulated in the United States by the Department of Transportation (DOT). U.S. federal regulations for the construction, testing and maintenance of compressed gas containers are contained in 49 CFR178, Subpart C. These DOT specifications apply to steel SCBA and large storage cylinders only. Cylinders constructed of manganese/steel and conforming to the proceeding DOT specifications designated by DOT3A marking on the cylinder. Steel cylinders constructed of chrome alloy steel and meeting DOT specifications are designated by a DOT3AA marking on the cylinder, followed by the marked cylinder service pressure.
NEW QUESTION # 48
The three basic calculation methods used to determine rate of fire flow are the Royer/Nelson. US National Fire Academy, and_________.
- A. Bernoulli calculation
- B. Venturi principle
- C. Hazen Williams
- D. Sprinkler calculations
Answer: C
NEW QUESTION # 49
The greatest number of civilian home fire deaths can be attributed to what area of fire origin in the home?
- A. Garage or vehicle storage area
- B. Kitchen or cooking area
- C. Common room, living room
- D. Heating equipment room
Answer: C
Explanation:
The correct answer is D. The greatest number of civilian home fire deaths can be attributed to the common room, living room, or family room area of origin in the home. According to a report by the NFPA, based on data from the National Fire Incident Reporting System (NFIRS) and NFPA's fire experience survey, 31 percent of the civilian home fire deaths in 2017-2021 occurred in fires that started in the common room, living room, or family room. This was followed by 29 percent of the deaths in fires that started in the bedroom or sleeping area, and 12 percent of the deaths in fires that started in the kitchen or cooking area. The common room, living room, or family room area of origin is also the leading area of origin for home fires and civilian home fire injuries, accounting for 24 percent and 21 percent of those incidents, respectively. Some of the common causes of fires in the common room, living room, or family room include smoking materials, heating equipment, electrical equipment, candles, and fireplaces. To prevent fires and fire deaths in the common room, living room, or family room, the NFPA recommends the following safety tips:
Keep smoking materials away from anything that can burn. Use deep, sturdy ashtrays and wet cigarette butts before discarding them.
Keep space heaters at least 3 feet away from anything that can burn. Turn them off when you leave the room or go to sleep.
Have a qualified electrician inspect and repair any faulty wiring or outlets. Avoid overloading circuits or extension cords. Unplug appliances when not in use.
Keep candles in sturdy holders and away from children, pets, and anything that can burn. Blow them out when you leave the room or go to sleep.
Have your chimney and fireplace cleaned and inspected annually by a professional. Use a metal or glass screen to keep sparks from flying out. Dispose of ashes in a metal container with a lid, and keep it outside at least 10 feet away from your home.
Install smoke alarms on every level of your home, inside each bedroom, and outside each sleeping area. Test them monthly and replace the batteries at least once a year. Consider installing a home fire sprinkler system for added protection.
NEW QUESTION # 50
Computers and other information technology equipment are particularly susceptible to
- A. foam, metal powders, and dry chemicals.
- B. light, hoselines, and airborn dust.
- C. heat, steam, and combustion products.
- D. special extinguishing agents.
Answer: C
Explanation:
Explanation
Computers and other information technology equipment are particularly susceptible to heat, steam, and combustion products, which can damage their sensitive components, cause data loss or corruption, and impair their functionality.Therefore, fire protection for IT equipment should consider the potential sources of heat, steam, and combustion products, such as electrical faults, flammable liquids, dust accumulation, water-based sprinklers, or smoke from adjacent areas, and implement appropriate measures to prevent, detect, and suppress fires, as well as to minimize the exposure of IT equipment to these hazards1234.References:Standard for the Fire Protection of Information Technology Equipment;Fire Protection of Computer Rooms-Legal Obligations and Best Practices - ISACA;Exploring Requirements for Information Technology Equipment;Demystifying IT room protection requirements - Consulting.
NEW QUESTION # 51
Which of the following represents a group A plastic?
- A. Urea rubber
- B. Natural rubber
- C. Chloroprene rubber
- D. Silicone rubber
Answer: C
NEW QUESTION # 52
Wn.cn class of fire-retardant roof coverings are effective against light fire exposures, and afford at least a slight degree of fire protection to the root decks?
- A. Class D coverings
- B. Class C coverings
- C. Class B coverings
- D. Class A coverings
Answer: B
NEW QUESTION # 53
What National Fire Incident Reporting System field describes how the heat source and the item first ignited came together to start a fire?
- A. Factor contributing to ignition
- B. Cause of ignition
- C. Equipment involved in ignition
- D. Item first ignited
Answer: A
NEW QUESTION # 54
For engine driven emergency power supplies, which of the following devices maintains a relatively constant speed of the prime mover throughout the full power output range by varying the fuel input to the prime mover?
- A. Distributor
- B. Alternator
- C. Generator
- D. Governor
Answer: D
Explanation:
Explanation
Governor
For engine driven emergency power supplies, the device that maintains a relatively constant speed of the prime mover throughout the full power output range by varying the fuel input to the prime mover is the governor. A governor is a device that automatically regulates the speed or power of an engine or other prime mover by adjusting the amount of fuel supplied to it. A governor senses the speed of the prime mover and compares it with a desired set point, and then controls the fuel valve to increase or decrease the fuel flow accordingly.By doing so, the governor ensures that the prime mover operates within a narrow range of speed or power, regardless of the load or other factors that may affect its performance12
NEW QUESTION # 55
The Safety Class for propane refrigerant R-290 is
- A. A3
- B. B2
- C. A2
- D. B1.
Answer: A
Explanation:
Explanation
The safety class for propane refrigerant R-290 is A3, which means it has no toxicity but high flammability.
The safety class is determined by the ASHRAE Standard 34, which assigns a capital letter (A or B) for the toxicity level and a number (1, 2, or 3) for the flammability level of a refrigerant. Propane has a very low global warming potential and ozone depletion potential, but it also has a very low flash point and high auto ignition temperature, which make it highly flammable in the presence of ignition sources.References:Propane R-290 | Copeland US;R-290 Propane Refrigerant Fact & Info Sheet;Safety Data Sheet - Refrigerants; NFPA Fire Protection Handbook, 21st Edition, Chapter 3, Section 3.3.4.
NEW QUESTION # 56
Which blister agent causes immediate pain upon contact with skin?
- A. Phosgene
- B. Sulfur mustard
- C. VX
- D. Lewisite
Answer: D
NEW QUESTION # 57
In considering the rating of audible appliances, in wide-open spaces, how many decibels does the sound pressure level (SPL) decrease every time the distance from the source is doubled?
- A. 10 dB
- B. 6 dB
- C. 16 dB
- D. 4 dB
Answer: B
Explanation:
The correct answer is B. In wide-open spaces, the sound pressure level (SPL) decreases by 6 decibels (dB) every time the distance from the source is doubled. This is known as the inverse square law of sound propagation, which states that the intensity of sound is inversely proportional to the square of the distance from the source. For example, if the SPL at 1 meter from the source is 100 dB, then the SPL at 2 meters from the source is 94 dB, and the SPL at 4 meters from the source is 88 dB123
NEW QUESTION # 58
Which factor plays a significant role in most industrial fire and explosion losses?
- A. Mechanical
- B. Human
- C. Process
- D. External
Answer: B
Explanation:
The answer is C. Human factor plays a significant role in most industrial fire and explosion losses. According to a study by Allianz Global Corporate & Specialty (AGCS), human error is the cause of 80% of all industrial accidents, including fires and explosions1. Human error can include mistakes, negligence, violations, or sabotage. Some examples of human errors that can lead to fires and explosions are:
Improper handling or storage of flammable or combustible materials
Failure to follow safety procedures or regulations
Lack of training or supervision
Poor maintenance or inspection of equipment or machinery
Ignoring or disabling alarms or warning systems
Smoking or using open flames near hazardous areas
Intentional or accidental ignition of explosives or incendiaries
To prevent or reduce the impact of human errors, industrial facilities should implement effective risk management strategies, such as:
Providing regular and adequate training and education for workers and managers Establishing and enforcing clear and consistent safety policies and rules Conducting thorough and frequent audits and inspections Installing and maintaining reliable fire protection systems and equipment Developing and practicing emergency response and evacuation plans Encouraging a positive safety culture and communication among all stakeholders
NEW QUESTION # 59
What is the minimum acceptable flow at the base of a riser including hose streams, ordinarily acceptable for pipe schedule sprinkler systems required for ordinary hazard (Group I) classified occupancies?
- A. 500 GPM
- B. 100 GPM
- C. 700 GPM
- D. 850 GPM
Answer: D
NEW QUESTION # 60
If smallpox was eradicated from the world in 1980, why is it a threat today?
- A. It has a spore form that can lie dormant for a decade or more.
- B. Some countries kept samples of it alive.
- C. It was not eradicated; rather everyone was either immune or vaccinated.
- D. It was premature to declare eradication in 1980.
Answer: B
NEW QUESTION # 61
After an emergency incident has occurred, a post-incident critique of the emergency preparedness procedure should be conducted covering the detection of the incident, implementation of incident command, and
- A. total time of the incident.
- B. where the incident occurred.
- C. cause of the incident.
- D. notification, alerting and warning procedures.
Answer: D
Explanation:
Explanation
The correct answer is B. After an emergency incident has occurred, a post-incident critique of the emergency preparedness procedure should be conducted covering the detection of the incident, implementation of incident command, andnotification, alerting and warning procedures. These are some of the key elements of an effective emergency response that need to be evaluated and improved after an incident.A post-incident critique is a systematic review of the actions and decisions taken during an emergency incident, with the aim of identifying lessons learned, best practices, gaps, and corrective actions1.A post-incident critique should involve all the relevant stakeholders, such as emergency responders, emergency managers, facility managers, and affected community members2.A post-incident critique should also follow a structured format, such as the one suggested by the Federal Emergency Management Agency (FEMA)3:
Introduction: The facilitator introduces the purpose, objectives, ground rules, and agenda of the critique session.
Incident Overview: The facilitator provides a brief summary of the incident, including the date, time, location, type, size, and impact of the incident.
Timeline Review: The facilitator leads a chronological review of the major events and actions that occurred during the incident, using a timeline or a log as a reference.
Strengths and Areas for Improvement: The facilitator solicits feedback from the participants on what went well and what needs to be improved, focusing on the following topics:
Detection of the incident: How was the incident detected and reported? How timely and accurate was the information? How effective were the communication systems and protocols?
Implementation of incident command: How was the incident command system established and maintained? How clear and appropriate were the roles and responsibilities of the incident commander and other staff? How well did the incident command coordinate with other agencies and organizations?
Notification, alerting and warning procedures: How were the internal and external stakeholders notified, alerted, and warned about the incident? How timely and accurate were the messages?
How effective were the methods and channels of communication?
Other topics: Depending on the nature and scope of the incident, other topics may include resource management, operational tactics, safety and security, public information, recovery and restoration, etc.
Action Plan: The facilitator summarizes the main findings and recommendations from the critique session, and assigns responsibilities and deadlines for implementing the corrective actions.
Conclusion: The facilitator thanks the participants for their contributions, and provides information on how the results of the critique will be documented and shared.
NEW QUESTION # 62
Fire tests typically relate to two types of fire properties, fire resistance and
- A. smoke spread.
- B. flame spread.
- C. reaction to fire.
- D. length of fire.
Answer: C
Explanation:
Fire tests typically relate to two types of fire properties, fire resistance and reaction to fire. Fire resistance is the ability of a building element or component to prevent the passage of heat and flames from one side to another, while reaction to fire is the response of a material or product in contributing to the development and spread of a fire. Fire resistance tests are usually performed on systems or assemblies, such as walls, floors, doors, or windows, while reaction to fire tests are usually performed on materials or products, such as sealants, insulation, cladding, or plastics. Reference: International Standards and Classifications for Fire Testing - Sika; Testing for Fire Resistance and Reaction to Fire - ICC NTA; 'Reaction to Fire' Vs 'Fire resistance' - Ask HILTI; What is the difference between Reaction to Fire and Resistance to Fire ...; Reaction to Fire vs Resistance to Fire | Nullifire UK
NEW QUESTION # 63
What class of openings is requited in walls between rooms with a 1-hour fire rating?
- A. Class A
- B. Class C
- C. Class D
- D. Class B
Answer: D
NEW QUESTION # 64
Which of the following is the correct UL classification of roof covering that include criteria for resistance to ignition?
- A. Option D
- B. Option A
- C. Option C
- D. Option B
Answer: C
NEW QUESTION # 65
Semiconductor manufacturing plants have several potential hazards that are not widely encountered in other industries including toxic materials, radio frequency fields, ionizing radiation, and:
- A. flammable liquids
- B. pyrophoric gases
- C. electrical
- D. hot work
Answer: D
Explanation:
http://www2.iccsafe.org/states/seattle/seattle_fire/pdfs/chapter%2018.pdf
NEW QUESTION # 66
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