Provide NFPA CFPS Practice Test Engine for Preparation
Detailed New CFPS Exam Questions for Concept Clearance
NEW QUESTION # 26
Potassium bicarbonate is a dry chemical agent considered to be twice as effective as
- A. potassium sulfide.
- B. Asodium bicarbonate.
- C. sodium chloride.
- D. monoammonium phosphate.
Answer: B
Explanation:
Explanation
Potassium bicarbonate is a dry chemical agent that is considered to be twice as effective as sodium bicarbonate in fire suppression, especially for Class B fires involving flammable liquids and gases. This is because potassium bicarbonate has a higher melting point and a lower decomposition temperature than sodium bicarbonate, which allows it to form a more stable and insulating layer on the burning surface.Potassium bicarbonate also has a lower pH and a higher specific gravity than sodium bicarbonate, which enhances its penetration and dispersion abilities123.References:Dry Chemical Agents - Purple-K Powder is Purple - Chemguard;Evaluation of Dry Chemical Fire Extinguishing Standards - NFPA;Potassium bicarbonate - Wikipedia.
NEW QUESTION # 27
Which of the following statements about smoke detectors is FALSE?
- A. Detectors using the photoelectric principle also use a small amount of radioactive material.
- B. Detectors using the ionization principle provide somewhat faster response to high-energy (open flaming) fires.
- C. Detectors using the cloud chamber principle also make use of the photoelectric principle.
- D. Detectors using the photoelectric principle provide somewhat faster response to low-energy (smoldering) fires.
Answer: A
Explanation:
Explanation
Smoke detector
Explore
Detectors using the photoelectric principle do not use a small amount of radioactive material. This is a false statement about smoke detectors. Detectors using the photoelectric principle use a light source and a light sensor to detect the presence of smoke. When smoke enters the detection chamber, it scatters the light and triggers the alarm.Detectors using the photoelectric principle are more responsive to low-energy (smoldering) fires that produce large smoke particles12.
Detectors using the cloud chamber principle also use the photoelectric principle. This is a true statement about smoke detectors. Detectors using the cloud chamber principle usea sealed chamber that contains a supersaturated vapor. When smoke enters the chamber, it causes the vapor to condense into droplets that reflect light. The light is then detected by a photoelectric sensor that activates the alarm.Detectors using the cloud chamber principle are very sensitive to small smoke particles34.
Detectors using the ionization principle provide somewhat faster response to high-energy (open flaming) fires.
This is a true statement about smoke detectors. Detectors using the ionization principle use a small amount of radioactive material that ionizes the air in the detection chamber. When smoke enters the chamber, it reduces the ionization and the electric current. The drop in current is then detected by a circuit that activates the alarm.Detectors using the ionization principle are more responsive to high-energy (open flaming) fires that produce small smoke particles12.
Detectors using the photoelectric principle provide somewhat faster response to low-energy (smoldering) fires.
This is a true statement about smoke detectors. Detectors using the photoelectric principle use a light source and a light sensor to detect the presence of smoke. When smoke enters the detection chamber, it scatters the light and triggers the alarm.Detectors using the photoelectric principle are more responsive to low-energy (smoldering) fires that produce large smoke particles12.
NEW QUESTION # 28
Fire alarm systems audible appliances ratings are usually stated as a sound pressure level (SPL) at what distance?
- A. 20 ft (6.10 m)
- B. 1 ft (0.31 m)
- C. 10 ft (3.05 m)
- D. 15 ft (4.57 m)
Answer: C
Explanation:
Explanation
Fire alarm systems audible appliances ratings are usually stated as a sound pressure level (SPL) at 10 ft (3.05 m) from the appliance. The SPL is measured in decibels (dB) and indicates the loudness of the sound produced by the appliance. The SPL at 10 ft (3.05 m) is used as a standard reference point for comparing different audible appliances and for designing fire alarm systems to meet the required audibility levels.References:
NFPA 72: National Fire Alarm and Signaling Code, 2019 Edition, Section 18.4.3.11 Fire Protection Handbook, 20th Edition, Volume 1, Chapter 7, Section 7.8.2.12
NEW QUESTION # 29
What gas is liberated when magnesium shavings or chips come in contact with water?
- A. Acetylene
- B. Hydrogen
- C. Oxygen
- D. Chlorine
Answer: B
NEW QUESTION # 30
The travel distance limit for a new unsprinklered educational occupancy is
- A. 250 ft. (76 m).
- B. 150 ft. (45 m).
- C. 200 ft. (61 m).
- D. 175 ft.(53 m).
Answer: D
Explanation:
Explanation
According to NFPA 101: Life Safety Code, 2018 Edition, the travel distance limit for a new unsprinklered educational occupancy is 175 ft. (53 m). This is the maximum distance that an occupant has to travel from any point within the building to reach an exit or exit access door. The travel distance limit for a new sprinklered educational occupancy is 250 ft. (76 m).These limits are based on the assumption that the building has at least two exits or exit access doors from each room or space12 References:
NFPA 101: Life Safety Code, 2018 Edition, Chapter 14
Deco DeD - I Dig Hardware
NEW QUESTION # 31
Critical Radiant Flux is used to classify
- A. roofing materials.
- B. exterior materials.
- C. interior floor finishes.
- D. interior wall finishes.
Answer: C
Explanation:
Explanation
Critical radiant flux is used to classifyinterior floor finishes. Critical radiant flux is a measure of the minimum radiant heat energy required to sustain flame propagation on a floor material or covering. It is determined by exposing a specimen to a radiant heat gradient and observing the distance from the ignition point to the flame-out point.The shorter the distance, the higher the critical radiant flux and the better the fire performance of the floor material or covering1.Critical radiant flux is used to classify floor materials and coverings according to their fire hazard and resistance, and to specify the minimum requirements for different occupancies and applications2.For example, the International Building Code (IBC) requires that interior floor finishes and coverings in exit access corridors and exit enclosures have a critical radiant flux of not less than
0.45 W/cm2, while those in other spaces have a critical radiant flux of not less than 0.22 W/cm23.Critical radiant flux is also used to evaluate the fire safety of floor materials and coverings in transportation vehicles, such as aircraft, trains, and buses4.
NEW QUESTION # 32
For standpipe systems containing 11/2 - 21/2 in. (40 - 65 mm) hose connection outlets without preconnected hose, a pressure regulating device is required when pressure exceeds
- A. 150 psi (1034 kPa).
- B. 175 psi (1207 kPa).
- C. 100 psi (689 kPa).
- D. 125 psi (862 kPa).
Answer: B
Explanation:
Explanation
Standpipe
Explore
175 psi (1207 kPa).
For standpipe systems containing 11/2 - 21/2 in. (40 - 65 mm) hose connection outlets without preconnected hose, a pressure regulating device is required when the pressure exceeds 175 psi (1207 kPa), according to NFPA 14, Standard for the Installation of Standpipe and Hose Systems, 2019 edition. This requirement applies to Class I and Class III standpipe systems, which are intended for use by fire department personnel or trained occupants. A pressure regulating device is a device that automatically reduces and controls the pressure of the water flowing through the hose connection outlet to a predetermined value.This device helps to prevent excessive pressure that could damage the hose, nozzle, or fittings, or cause difficulty in handling the hose stream123 References:
NFPA 14: Standard for the Installation of Standpipe and Hose Systems1
Standpipe System Design and Calculations | NFPA | NFPA2
ENGINE COMPANY STANDPIPE OPERATIONS:PRESSURE-REGULATING DEVICES3
NEW QUESTION # 33
The Safety Class for propane refrigerant R-290 is
- A. B2
- B. A3
- C. B1.
- D. A2
Answer: B
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 # 34
Which type of fire alarm system transmits signals that are permanently recorded at a constantly attended supervising station located either at the protected premises or at another location of the property owner?
- A. Remote station
- B. Auxiliary
- C. Central station
- D. Proprietary
Answer: D
Explanation:
Explanation
A proprietary fire alarm system is a type of fire alarm system that transmits signals that are permanently recorded at a constantly attended supervising station located either at the protected premises or at another location of the property owner. A proprietary fire alarm system is owned and operated by the property owner or the owner's agent. A proprietary fire alarm system is intended to provide fire alarm service to a single property or a campus of related properties.References:
NFPA 72: National Fire Alarm and Signaling Code, 2019 Edition, Section 3.3.105.11 Fire Protection Handbook, 20th Edition, Volume 1, Chapter 7, Section 7.2.1.12
NEW QUESTION # 35
What is the minimum pipe diameter size for direct discharge of steam inside a water tank?
- A. 1 1/2 in. (38 mm)
- B. 1/2 in. (13 mm)
- C. 1 in. (25 mm)
- D. 2 in. (50 mm)
Answer: D
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 # 36
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. 9,000
- B. 8,500
- C. 7,500
- D. 10,000
Answer: C
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 # 37
According to the Consumer Products Safety Commission, what type of fabric is used 51% of the time on upholstered furniture?
- A. Coated PVC
- B. Leather
- C. Cellulosic
- D. Thermoplastic
Answer: C
Explanation:
Explanation
According to the Consumer Products Safety Commission (CPSC), the most common type of fabric used on upholstered furniture is cellulosic. Cellulosic fabrics are made from natural fibers derived from plants, such as cotton, linen, rayon, and hemp. Cellulosic fabrics account for about 51% of the total fabric weight used on upholstered furniture in the United States1. Cellulosic fabrics are popular because they are soft, comfortable, breathable, and versatile. However, they are also highly flammable and can contribute to the spread of fire if ignited2. Therefore, the CPSC has established a flammability standard for upholstered furniture that requires cellulosic fabrics to pass a smolder resistance test3. References:
Upholstered Furniture Business Education | CPSC.gov
Fire Fighting Foams - Chemguard
Standard for the Flammability of Residential Upholstered Furniture
NEW QUESTION # 38
Large quantities of flammable or combustible liquids (all classes) are best transferred
- A. using inert gas pressure systems.
- B. by gravity flow.
- C. through piping by pumps.
- D. using air pressure systems.
Answer: C
Explanation:
Explanation
Large quantities of flammable or combustible liquids (all classes) are best transferred through piping by pumps. This method minimizes the risk of spills, leaks, fires, and explosions that may occur when transferring liquids by other means, such as air pressure, inert gas pressure, or gravity flow. Piping systems should be designed, installed, operated, and maintained in accordance with NFPA 30: Flammable and Combustible Liquids Code and other applicable standards. Piping systems should also include proper grounding and bonding, venting, and emergency shutoff devices to prevent static electricity, overpressure, and accidental release of liquids.
References: NFPA 30: Flammable and Combustible Liquids Code, 2021 Edition, Chapter 271; Fire Protection Handbook, 20th Edition, Volume 1, Chapter 8, Section 8.3.12.
NEW QUESTION # 39
A multistage centrifugal fire pump is defined as
- A. having two or more impellers on one shaft as a single unit.
- B. requiring more than one input location connection.
- C. being able to operate with a diesel, steam or electric driver.
- D. a pump installed on more than one floor or one building.
Answer: A
Explanation:
Explanation
Fire pump
Explore
A multistage centrifugal fire pump is defined as having two or more impellers on one shaft as a single unit. A multistage centrifugal pump is a type of centrifugal pump that uses multiple impellers to increase the pressure and flow of water.Each impeller acts like a single-stage pump within a chain of pumps, and the water passes through each impeller in series, gaining pressure and velocity at each stage1.A multistage centrifugal fire pump is used to provide high-pressure water for fire protection systems, especially in high-rise buildings or large industrial facilities2.A multistage centrifugal fire pump can be driven by an electric motor, a diesel engine, or a steam turbine3.References:
Our Guide to Multistage Centrifugal Pumps | C&B Equipment
Fire Pump Types | NFPA
NFPA 20: Changes to the fire pump standard - Consulting
NEW QUESTION # 40
What type of process hazard analysis program addresses the prevention of flammable and hazardous materials released from containment?
- A. Process safety
- B. Mechanical integrity
- C. Fault tree
- D. Management of change
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 # 41
Which type of roof covering is most effective in preventing the spread of fires from flying brands?
- A. Class B
- B. Class C
- C. Class D
- D. Class A
Answer: D
Explanation:
Explanation
Class A roof coverings are the most effective in preventing the spread of fires from flying brands. Flying brands are burning embers or pieces of combustible material that are carried by the wind and can ignite other combustible materials or structures. Class A roof coverings are tested to withstand severe fire exposure from simulated fire sources, such as large burning brands, and do not produce flying brands themselves. Class A roof coverings include materials such as asphalt shingles, metal sheets, clay or concrete tiles, slate, and some types of synthetic membranes12. References:
Class A, B, and C Roof Ratings - UL
Fire-Resistant Roofs - Fire Safe Marin
NEW QUESTION # 42
The two major principles used to determine egress width are the
- A. density and group method.
- B. flow and the capacity method.
- C. stair width and floor method.
- D. inverse and the evacuation method.
Answer: B
NEW QUESTION # 43
NFPA 750 defines a low-pressure water mist system as one that operates at or below
- A. 125 psi (8.6 bar).
- B. 200 psi (13.8 bar).
- C. 175 psi (11.9 bar).
- D. 150 psi (10.3 bar).
Answer: D
NEW QUESTION # 44
When assessing industrial fire risks, the type of risk management conducted depends on the significance of the decision, the complexity of the problem, and
- A. documentation requirements.
- B. owner and management expectations.
- C. evaluation methodologies.
- D. time and cost limitations.
Answer: D
NEW QUESTION # 45
The duration of required fire flow in public supply systems ranges from
- A. 3-8 hours.
- B. 1-6 hours.
- C. 2-10 hours.
- D. 1-4 hours.
Answer: D
NEW QUESTION # 46
What type of load is the weight of items such as furnishings, people, and equipment?
- A. Static
- B. Live
- C. Residual
- D. Dead
Answer: D
Explanation:
Explanation
The weight of items such as furnishings, people, and equipment is called dead load. Dead load is the permanent load that is applied to a structure or a component of a structure1. It includes the weight of the structure itself, as well as any fixed attachments or equipment2. Dead load is one of the factors that determines the fire resistance rating of a structure or a component3. References:
NFPA 557: Standard for Determination of Fire Loads for Use in Structural Fire Protection Design An Overview of Fire Protection for Structural Engineers SFPE Handbook of Fire Protection Engineering, 5th edition
NEW QUESTION # 47
The types of overspray collectors associated with spray booths can be categorized into venturi scrubbers, waterfall scrubbers, dry filter, and
- A. cartridge filter.
- B. cyclone separator.
- C. baffle maze.
- D. vertical oscillator.
Answer: A
Explanation:
Explanation
The types of overspray collectors associated with spray booths can be categorized into venturi scrubbers, waterfall scrubbers, dry filter, and cartridge filter. Venturi scrubbers use a high-velocity water spray to capture the overspray particles in a turbulent zone. Waterfall scrubbers use a curtain of water flowing over a perforated plate to wash down the overspray. Dry filter collectors use a series of filters, such as paper, fiberglass, or synthetic media, to trap the overspray. Cartridge filter collectors use pleated cartridges with high surface area and efficiency to capture the overspray. These collectors also have a self-cleaning mechanism that uses compressed air to dislodge the overspray from the cartridges.
References:Spray Booth Filters: Types and Selection;Spray Booths and Paint Finishing Operations;Spray Booth Filters: Types and Selection;Spray Booth Filters: Types and Selection;Spray Booth Filters: Types and Selection
NEW QUESTION # 48
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