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NEW QUESTION # 11
What type of fire pump has a pressure range that can exceed 300 psi (2,068 kPa)?
- A. Suction in-line
- B. Vertical turbine
- C. Horizontal-end suction
- D. Split case
Answer: A
Explanation:
Explanation
Fire pump
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A suction in-line fire pump has a pressure range that can exceed 300 psi (2,068 kPa). This type of pump is a centrifugal pump that is installed in a vertical position with the suction and discharge connections in the same line. The pump is designed to handle high pressures and flows, and it is suitable for high-rise buildings and other applications that require high head.According to NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, a suction in-line fire pump can have a rated pressure of up to 360 psi (2,482 kPa)1.The other types of fire pumps mentioned in the question have lower pressure ranges, as shown in the table below2:
Type of fire pump
Pressure range (psi)
Pressure range (kPa)
Horizontal-end suction
40 to 150
276 to 1,034
Split case
40 to 150
276 to 1,034
Vertical turbine
40 to 150
276 to 1,034
Suction in-line
40 to 360
276 to 2,482
References:NFPA 20: Fire pump design | Consulting - Specifying Engineer;Understanding the Basics of Fire Pumps | Pumps & Systems
NEW QUESTION # 12
NFPA 750 defines a low-pressure water mist system as one that operates at or below
- A. 150 psi (10.3 bar).
- B. 125 psi (8.6 bar).
- C. 175 psi (11.9 bar).
- D. 200 psi (13.8 bar).
Answer: A
NEW QUESTION # 13
Wet chemical extinguishing agents when sprayed on a grease fire, extinguish the fire by
- A. Removal of the radical free agent
- B. Removal of the fuel
- C. Radiation shielding
- D. Smothering and cooling
Answer: D
Explanation:
Explanation
Wet chemical extinguishing agents, such as potassium acetate and potassium citrate, when sprayed on a grease fire, extinguish the fire by smothering and cooling. The wet chemical agent reacts with the hot grease and forms a layer of soap-like foam on the surface of the fat, which acts as an insulation between the hot grease and the atmosphere, preventing the escape of combustible vapors and oxygen supply.The wet chemical agent also absorbs heat from the grease and lowers its temperature below the ignition point12 References:
What is the Difference Between a Wet and Dry Chemical Fire ...
Wet Chemical (Class K) Fire Extinguisher - Portable - WFX
NEW QUESTION # 14
Which smoke detector type contains a small amount of radioactive material and functions by sensing a decrease in conductance of the air when smoke particles enter the chamber?
- A. Photoelectric
- B. Light scattering
- C. lonization
- D. Cloud chamber air sampling
Answer: C
Explanation:
Explanation
Smoke detector
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The smoke detector type that contains a small amount of radioactive material and functions by sensing a decrease in conductance of the air when smoke particles enter the chamber is theionization smoke detector.
Ionization smoke detectors use a small amount of americium-241, a radioactive element, to ionize the air molecules inside a sensing chamber. This creates a low-level electric current between two electrodes. When smoke enters the chamber, it disrupts the ionized air and reduces the current flow. This triggers the alarm to sound.Ionization smoke detectors are more sensitive to small particles of smoke, such as those produced by flaming fires1.However, they may also be more prone to false alarms from cooking or steam, and they require proper disposal of the radioactive source2.
References:
Smoke Detector Types: Which Type of Smoke Detector Is Best? - X-Sense
How Does Your Smoke Detector Work? - ThoughtCo
NEW QUESTION # 15
What data analysis approach provides the broadest perspective of a fire problem?
- A. Data re-examination
- B. Trend analysis
- C. Top-down approach
- D. Scenario groupings
Answer: C
Explanation:
Explanation
Scenario groupings is a data analysis approach that provides the broadest perspective of a fire problem by identifying and comparing different types of fire incidents based on their characteristics, such as ignition source, fuel, location, time, and outcome. This approach can help reveal patterns, trends, and relationships among fire scenarios and support fire prevention and protection strategies.References:Fire Data Analysis Handbook, Chapter 5: Scenario Groupings; [Fire Protection Handbook], Section 2, Chapter 3: Fire Data Collection and Analysis.
NEW QUESTION # 16
For combustion to take place, a combustible material, an oxidizing agent, and an ignition source are required.
The exception is
- A. spontaneous combustion.
- B. dielectric heating.
- C. radiation diffusion.
- D. conduction transfer.
Answer: A
Explanation:
Explanation
Spontaneous combustion is the exception to the requirement of a combustible material, an oxidizing agent, and an ignition source for combustion to take place. Spontaneous combustion is a phenomenon in which a material can ignite without any external heat or flame, due to a chemical reaction within the material that generates enough heat to reach the ignition temperature. Spontaneous combustion can occur in certain materials that are prone to self-heating, such as oily rags, hay, coal, and compost. Spontaneous combustion is a type of smoldering combustion, which is a slow, low-temperature, flameless form of combustion.References:
Fire Protection Handbook, 20th Edition, Volume 1, Chapter 2, Section 2.2.1.11 NFPA 921: Guide for Fire and Explosion Investigations, 2021 Edition, Section 4.3.12
NEW QUESTION # 17
Building codes should limit the size of an unsprinklered facility used for the processing and storage of Municipal Solid Waste built of type V construction to how many square feet?
- A. 7,500
- B. 8,500
- C. 10,000
- D. 9,000
Answer: A
Explanation:
Explanation
According to NFPA 230: Standard for the Fire Protection of Storage, 2015 Edition, building codes should limit the size of an unsprinklered facility used for the processing and storage of Municipal Solid Waste (MSW) built of type V construction to 7,500 ft2 (697 m2). This is based on the assumption that the MSW has a heat release rate of 18,000 Btu/ft2-min (200 kW/m2) and a fire growth rate of 0.046 min-1.Type V construction is defined as a type of construction in which the structural elements, exterior walls, and interior walls are of any materials permitted by the code123 References:
NFPA 230: Standard for the Fire Protection of Storage
5 Types of Construction per the IBC | Building Code Trainer
2.4 MUNICIPAL SOLID WASTE LANDFILLS - U.S. Environmental Protection Agency
NEW QUESTION # 18
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 # 19
OSHA requires fire fighter training in hazardous materials, respiratory protection, and
- A. emergency communications.
- B. live fire training.
- C. communicable diseases.
- D. emergency medical services.
Answer: C
Explanation:
Explanation
OSHA requires fire fighter training in hazardous materials, respiratory protection, and communicable diseases.
According to OSHA standards, fire fighters must receive annual training in hazardous materials and infectious diseases, and initial and periodic training in respiratory protection. These topics are essential for fire fighters to protect themselves and others from exposure to harmful substances and pathogens.
References:OSHA training requirements for volunteer fire company personnel;What are the Current OSHA/PESH Training Requirement for Firefighters: A Review;Training requirements for firefighters;Training Requirements in OSHA Standards
NEW QUESTION # 20
What type of process hazard analysis program addresses the prevention of flammable and hazardous materials released from containment?
- A. Process safety
- B. Management of change
- C. Mechanical integrity
- D. Fault tree
Answer: A
Explanation:
Explanation
Process safety is the type of process hazard analysis program that addresses the prevention of flammable and hazardous materials released from containment. Process safety is a discipline that focuses on the prevention and control of incidents that have the potentialto cause catastrophic consequences involving fire, explosion, or toxic release. Process safety involves the application of engineering and management principles, criteria, and techniques to identify, understand, and control process hazards. Process safety covers many aspects of a process, such as design, operation, maintenance, inspection, testing, and emergency response.
References: Process hazard analysis - Wikipedia1; What does the OSHA standard, - Occupational Safety and Health Administration2; Fire Protection Handbook, 20th Edition, Volume 1, Chapter 8, Section 8.3.13.
NEW QUESTION # 21
What is the minimum pipe diameter size for direct discharge of steam inside a water tank?
- A. 1 in. (25 mm)
- B. 1 1/2 in. (38 mm)
- C. 2 in. (50 mm)
- D. 1/2 in. (13 mm)
Answer: C
Explanation:
Explanation
The minimum pipe diameter size for direct discharge of steam inside a water tank is 2 in. (50 mm), according to NFPA 13, Standard for the Installation of Sprinkler Systems. This is to prevent water hammer, noise, and vibration caused by the rapid condensation of steam when it contacts the water. The pipe should also be equipped with a check valve to prevent backflow of water into the steam source.References: NFPA 13, Standard for the Installation of Sprinkler Systems, 2023 Edition, Chapter 8, Section 8.16.4.5.3; NFPA Fire Protection Handbook, 21st Edition, Chapter 14, Section 14.3.4.2.
NEW QUESTION # 22
To be considered a family day-care home, what is the maximum allowable number of clients?
- A. Six
- B. Twelve
- C. Four
- D. Two
Answer: A
Explanation:
Explanation
The maximum allowable number of clients for a family day-care home varies by state and territory, but generally ranges from four to six children unrelated to the operator. A family day-care home is a facility in which a small group of children receive child care services in the provider's own home, such as a house, apartment, or condo unit1. To ensure a safe care environment, states and territories use child care licensing regulations to limit the number of children, as well as the number of infants and toddlers, that can receive care in a family day-care home1. Some states and territories may also offer certification or registration to help ensure some basic health and safety standards in certain home-based child care programs1. To learn more about how your state or territory regulates family day-care homes, you can visit the child care consumer education website and child care resource and referral agency for your state or territory1. References:
Family Child Care Homes | Childcare.gov
NEW QUESTION # 23
How many additional switches or circuit breakers are allowed for a separate service?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
Explanation
According to NFPA 70: National Electrical Code (NEC) 2020 Edition, Article 230.71(A), each service shall have only one disconnecting means unless the requirements of 230.71(B) are met, which provide four specific service configurations. In each configuration, there shall be not more than six switches or sets of circuit breakers, or a combination of not more than six switches and sets of circuit breakers, per service grouped in any one location. Therefore, the maximum number of additional switches or circuit breakers allowed for a separate service is six.References:
NFPA 70: National Electrical Code (NEC) 2020 Edition, Article 230.71(A) and (B)12 ElectricalLicenseRenewal.com, 230.71 Maximum Number of Disconnects3
NEW QUESTION # 24
The primary mechanism by which carbon dioxide extinguishes fire is
- A. cooling.
- B. saponification.
- C. smothering.
- D. chemical inhibition.
Answer: C
Explanation:
Explanation
Fire extinguisher
Explore
smothering.
The primary mechanism by which carbon dioxide extinguishes fire is smothering, or displacing the oxygen that the fire needs to sustain combustion. Carbon dioxide is a gas that is heavier than air, so when it is released from the extinguisher, it forms a blanket over the fire and pushes away the oxygen.Without oxygen, the fire cannot continue to burn and is extinguished1234 Cooling is a secondary mechanism by which carbon dioxide extinguishes fire. Carbon dioxide is stored as a liquid under high pressure in the extinguisher, and when it is released, it expands rapidly and cools down. The cold gas absorbs heat from the fire and lowers the temperature of the fuel below its ignition point.However, cooling is not the main effect of carbon dioxide, as it is less effective than water in reducing the heat of the fire1234 Saponification and chemical inhibition are not mechanisms by which carbon dioxide extinguishes fire.
Saponification is a process by which wet chemical agents react with fats and oils to form a soapy foam that seals the surface of the fire and prevents re-ignition. Chemical inhibition is a process by which dry chemical agents interfere with the chemical chain reaction of the fire and stop the production of free radicals that propagate the combustion.These mechanisms are used by other types of fire extinguishers, such as Class K and Class D extinguishers, respectively1234 References:
Carbon Dioxide Extinguishers - University of South Carolina4
How Does A Co2 Fire Extinguisher Work2
Why is Carbon Dioxide Used to Extinguish Oil Fires3
What is a Carbon Dioxide Fire Extinguisher?- Safeopedia1
NEW QUESTION # 25
Which of the following would NOT be an appropriate purpose for employing a guard service to protect a property against fire loss?
- A. To facilitate and control the movement of persons into, out of, and within the property
- B. To perform routine housekeeping and equipment maintenance operations during nonproduction hours
- C. To protect the property at times when the management is not present
- D. To carry out procedures for the orderly conduct of some operations on the property
Answer: B
Explanation:
Explanation
The correct answer is C. To perform routine housekeeping and equipment maintenance operations during nonproduction hours would NOT be an appropriate purpose for employing a guard service to protect a property against fire loss. A guard service is typically hired to provide security and protection for a property, not to perform other tasks that are unrelated to fire prevention or control. Housekeeping and equipment maintenance operations should be done by qualified and authorized personnel who are trained and equipped to handle any potential fire hazards. A guard service may not have the necessary skills, tools, or authority to perform these operations safely and effectively.Moreover, these operations may interfere with the guard service's primary duty of monitoring and patrolling the property for any signs of fire or intrusion12345
NEW QUESTION # 26
Power for driving fire pumps is selected on the basis of reliability, adequacy, economy, and
- A. safety.
- B. efficiency.
- C. ecology.
- D. adaptability.
Answer: A
Explanation:
Explanation
Fire pump
Explore
The correct answer is B.Safety is one of the criteria for selecting the power source for driving fire pumps, according to NFPA 20, Chapter 9.1.1.11. Reliability, adequacy, and economy are the other criteria mentioned in the same chapter. Efficiency, adaptability, and ecology are not explicitly stated as criteria in NFPA 20, although they may be considered as secondary factors in some cases.
1:Pump Installation: Everything About Electric and Diesel Driven Fire ...
NEW QUESTION # 27
In the plastics industry, which one of the following is NOT one of the four broad areas of processing?
- A. Manufacturing
- B. Conversion
- C. Polymerization
- D. Finishing
Answer: A
Explanation:
Explanation
In the plastics industry, the four broad areas of processing arepolymerization,conversion,finishing, and recycling1.Polymerization is the process of creating plastic resins from monomers or pre-polymers, using chemical reactions such as addition, condensation, or ring-opening2.Conversion is the process of transforming plastic resins into plastic products, using various methods such as injection molding, blow molding, extrusion, rotational molding, and thermoforming3.Finishing is the process of adding value to plastic products, such as coating, printing, welding, or assembling4.Recycling is the process of recovering plastic waste and converting it into new plastic products or raw materials, using mechanical, chemical, or biological methods5. Therefore, manufacturingis not one of the four broad areas of processing in the plastics industry, as it is a general term that encompasses all the stages of producing plastic products from raw materials.References:
Plastics Manufacturing: Types of Plastic and Processes - Deskera
Plastics industry - Wikipedia
Methods of Processing Plastic - Plastics Industry
Plastic recycling - Wikipedia
Polymerization - an overview | ScienceDirect Topics
NEW QUESTION # 28
What is the maximum allowable quantity per control area for a nonliquified oxidizing gas stored in a gas cabinet in an unsprinklered area?
- A. 1500 ft3 (43 m3)
- B. 1000 ft3 (28 m3)
- C. 3000 ft3 (85 m3)
- D. 2000 ft3 (56 m3)
Answer: D
Explanation:
Explanation
According to NFPA 400, Table 5.2.1.1.3, the maximum allowable quantity (MAQ) of a nonliquified oxidizing gas per control area in an unsprinklered area is 2000 ft3 (56 m3) when stored in a gas cabinet. This quantity can be increased by 100% if the area is sprinklered or by 300% if the area is also provided with a gas detection system. A gas cabinet is a ventilated enclosure for the storage of one or more compressed gas containers that provides a method of control for potential leakage or fire exposure hazards [NFPA 400,
3.3.32].References:NFPA 400, Table 5.2.1.1.3;NFPA 400, 3.3.32;NFPA 400, 5.2.1.1.3.1;NFPA 400,
5.2.1.1.3.2.
NEW QUESTION # 29
Panic hardware devices are designed to facilitate the release of the latching device on a door with a pressure note xceeding
- A. 10 pounds (4.5 kg.) is applied in the direction of exit travel.
- B. 20 pounds (9.1 kg.) is applied in the direction of exit travel.
- C. 15 pounds (6.8 kg.) is applied in the direction of exit travel.
- D. 5 pounds (2.3 kg.) is applied in the direction of exit travel.
Answer: C
Explanation:
Explanation
Panic hardware devices are designed to facilitate the release of the latching device on a door with a pressure not exceeding 15 pounds (6.8 kg.) is applied in the direction of exit travel. This is the maximum force allowed by the codes and standards that regulate the use and installation of panic hardware, such as NFPA 101, NFPA
80, and ANSI/BHMA A156.3. The purpose of this requirement is to ensure that the doors can be easily opened by anyone in an emergency situation, without prior knowledge or special effort.References:Codes to Know for Panic Hardware - Facilitiesnet;Panic and emergency escape hardware | ASSA ABLOY | ASSA ABLOY; NFPA 101, Life Safety Code, 2023 Edition, Chapter 7, Section 7.2.1.7.2; NFPA 80, Standard for Fire Doors and Other Opening Protectives, 2023 Edition, Chapter 6, Section 6.1.3.5.1; ANSI/BHMA A156.3, Standard for Exit Devices, 2014 Edition, Section 4.1.1.
NEW QUESTION # 30
What is the maximum allowable travel distance from any part of a smoke compartment to the door in a smoke barrier in a new health care facility?
- A. 150 ft. (46 m).
- B. 200 ft. (60 m).
- C. 50 ft. (15 m).
- D. 100 ft.(30 m).
Answer: B
Explanation:
Explanation
The maximum allowable travel distance from any part of a smoke compartment to the door in a smoke barrier in a new health care facility is 200 ft. (60 m). This is based on NFPA 101: Life Safety Code, 2018 Edition, Chapter 18, Section 18.3.7.3, which states that "the travel distance from any point in a smoke compartment to reach a door in the required smoke barrier shall not exceed 200 ft (61 m)." A smoke compartment is a space within a building that is enclosed by smoke barriers on all sides, including the top and bottom. A smoke barrier is a continuous membrane, or a combination of materials, that is designed to restrict the movement of smoke.A smoke barrier door is a door assembly that is installed in a smoke barrier to allow access between smoke compartments123
NEW QUESTION # 31
Which type of heat detector automatically resets after operation, when the ambient temperature drops below the operating temperature?
- A. Rate compensation
- B. Electronic spot-type
- C. lonization
- D. Rate-of-Rise
Answer: D
NEW QUESTION # 32
The coefficient of discharge of a fire hydrant when the outlet is smooth and well-rounded outlet is?
- A. 0.90.
- B. 0.70.
- C. 0.87
- D. 0.82
Answer: A
Explanation:
Explanation
The coefficient of discharge of a fire hydrant when the outlet is smooth and well-rounded is 0.90. This is the highest coefficient given by NFPA 291 for fire hydrant outlets, and it means that the stream is almost as large as the outlet diameter. The coefficient of discharge is a factor that accounts for the difference between the actual flow and the theoretical flow from an orifice, based on the shape and condition of the outlet1. A lower coefficient means that the stream is more restricted and has a smaller cross-sectional area than the outlet. NFPA 291 provides three coefficients for fire hydrant outlets, depending on how the outlet projects into the barrel: 0.90 for smooth and well-rounded outlets, 0.80 for outlets with a hexagonal or square projection, and 0.70 for outlets with a long projection or adamaged edge2. The coefficient of discharge is used to calculate the flow rate from the pitot pressure measured at the centerline of the stream3. References:
Fire Fighting Foams - Chemguard
Guide to Hydrant Flow Testing | WSRB
New Fire Hydrant Flow Test Charts (PDF) - MeyerFire
NEW QUESTION # 33
The minimum width of a doorway in a means of egress to accommodate a person in a wheelchair is
- A. 32 inches (813 mm).
- B. 28 inches (711 mm).
- C. 40 inches (1016 mm).
- D. 36 inches (914 mm).
Answer: A
Explanation:
Explanation
The minimum width of a doorway in a means of egress to accommodate a person in a wheelchair is 32 inches (813 mm).This is based on the requirements of the Americans with Disabilities Act (ADA) and the International Building Code (IBC), which both specify that doors in a path of egress and doors on an accessible route must have a clear opening width of at least 32 inches (813 mm)12. This width allows enough space for a person in a wheelchair to maneuver through the doorway without difficulty. A wider doorway may be preferable for some types of wheelchairs or other assistive devices, but 32 inches (813 mm) is the minimum standard for accessibility and safety.References:DECODED: Calculating the Egress Width of Door Openings - I Dig Hardware;Digital Codes.
NEW QUESTION # 34
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