Actual4Dumps CFPS Exam Questions | Real CFPS Practice Dumps
Verified CFPS Exam Dumps Q&As - Provide CFPS with Correct Answers
NEW QUESTION # 44
The vented gas appliance defined as an appliance that operates with a nonpositive vent pressure and a vent static pressure and a vent gas temperature that may cause excessive condensation in the vent is a:
- A. Category IV
- B. Category III
- C. Category I
- D. Category II
Answer: C
NEW QUESTION # 45
When using water mist as an extinguishing mechanism, the effectiveness of a fine mist depends on
- A. how much conductive heat the mist system will absorb.
- B. how much mist diverts to the compartment boundaries.
- C. the ability of the mist to directly spray on the fire.
- D. the momentum and direction of the spray relative to the fire.
Answer: D
Explanation:
Explanation
When using water mist as an extinguishing mechanism, the effectiveness of a fine mist depends on the momentum and direction of the spray relative to the fire. The momentum and direction of the spray determine how well the mist can penetrate the fire plume and reach the flame zone, where the mist droplets can evaporate and cool the fire, displace oxygen, and dilute the fuel vapors. The mist spray should have sufficient momentum to overcome the buoyancy and entrainment of the fire plume, and the direction of the spray should be aligned with the fire plume to avoid deflection and dispersion. The ability of the mist to directly spray on the fire, how much mist diverts to the compartment boundaries, and how much conductive heat the mist system will absorb are not the main factors affecting the extinguishing effectiveness of a fine mist.
References:Water Mist Systems Overview | NFPA;Engineering Relations for Water Mist Fire Suppression Systems;Effectiveness of Swirl Water Mist Nozzles for Fire Suppression
NEW QUESTION # 46
Which pure metal in its solid form in oxygen has the highest ignition temperature in degrees Fahrenheit?
- A. Titanium
- B. Potassium
- C. Zirconium
- D. Aluminum
Answer: A
Explanation:
Explanation
According to the web search results, titanium is the pure metal in its solid form in oxygen that has the highest ignition temperature in degrees Fahrenheit.The spontaneous-ignition temperature of titanium in the solid phase (below melting) is about 3020°F (1660°C)1.Aluminum, potassium, and zirconium have lower ignition temperatures in the solid phase, ranging from 1292°F (700°C) to 1652°F (900°C)23.References:
IGNITION OF METALS IN HIGH PRESSURE OXYGEN2
Combustion of Metals in Oxygen-Enriched Atmospheres3
High-temperature oxidation and ignition of metals1
NEW QUESTION # 47
John Freeman developed a rule for fire hydrant spacing in compact mercantile and manufacturing districts of:
- A. 350 ft (107 m)
- B. 250 ft (76 m)
- C. 300 ft (91 m)
- D. 400 ft (122 m)
Answer: B
Explanation:
NEW QUESTION # 48
The most common method of measuring flow in an open steam discharging from an orifice is by direct measurement of the velocity head using a:
- A. Bernoulli dial
- B. Flow valve
- C. Pitot tube
- D. Flow meter
Answer: C
Explanation:
Flow tubes are somewhat similar to venturi tubes except that they do not have the entrance cone. They have a tapered throat, but the exit is elongated and smooth. The distance between the front face and the tip is approximately one-half the pipe diameter. Pressure taps are located about one-half pipe diameter downstream and one pipe diameter upstream. (Back to Meter Types Table) Flow Nozzles, at high velocities, can handle approximately 60 percent greater liquid flow than orifice plates having the same pressure drop. Liquids with suspended solids can also be metered. However, use of the units is not recommended for highly viscous liquids or those containing large amounts of sticky solids.
Pitot tubes sense two pressures simultaneously, impact and static. The impact unit consists of a tube with one end bent at right angles toward the flow direction. The static tube's end is closed, but a small slot is located in the side of the unit. The tubes can be mounted separately in a pipe or combined in a single casing. Pitot tubes are generally installed by welding a coupling on a pipe and inserting the probe through the coupling. Use of most pitot tubes is limited to single point measurements. The units are susceptible to plugging by foreign material in the liquid. Advantages of pitot tubes are low cost, absence of moving parts, easy installation, and minimum pressure drop.
Elbow tap meters operate on the principle that when liquid travels in a circular path, centrifugal force is exerted along the outer edges. Thus, when liquid flows through a pipe elbow, the force on the elbow's interior surface is proportional to the density of the liquid times the square of its velocity. In addition, the force is inversely proportional to the elbow's radius.
NEW QUESTION # 49
Typical fire pump drivers reach maximum brake horsepower between
- A. 110-125% of rated capacity.
- B. 65-85% of rated capacity.
- C. 140-170% of rated capacity.
- D. 90-100% of rated capacity.
Answer: C
Explanation:
Explore
Typical fire pump drivers reach maximum brake horsepower (BHP) between 140% and 170% of rated capacity, depending on the type and size of the pump. This means that the driver must be able to provide enough power to operate the pump at its peak efficiency point, which is usually beyond the rated capacity. The rated capacity is the flow rate at which the pump is designed to deliver a certain pressure, as specified by NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection. The maximum BHP is the highest power output required by the pump at any point on its performance curve. The driver must be sized to match the maximum BHP of the pump, with some allowance for service factor and safety margin. Reference: Understanding the Basics of Fire Pumps | Pumps & Systems; How are Engines and Motors Sized for Fire Pumps?; NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2023 Edition, Chapter 4, Section 4.7.
NEW QUESTION # 50
The goals of the first edition of NFPA 13D were to provide sufficient time for safe egress or rescue, economic viability, and
- A. alert the fire department.
- B. prevent flashover.
- C. limit damage to the dwelling.
- D. limit water damage.
Answer: C
Explanation:
the goals of the first edition of NFPA 13D were to provide sufficient time for safe egress or rescue, economic viability, and limit damage to the dwelling. The first edition of NFPA 13D was published in 1975 and was based on the concept of a "life safety" sprinkler system that was intended to protect the occupants of one- and two-family dwellings and manufactured homes from fire. The first edition of NFPA 13D stated that the system was not designed to protect the property or contents from fire damage, but rather to provide a tenable environment for escape or rescue 1. The first edition of NFPA 13D also recognized the need for economic viability of the system, and therefore allowed for reduced water supply and piping requirements compared to other sprinkler standards 2. The first edition of NFPA 13D did not explicitly state the goal of limiting damage to the dwelling, but it implied that the system would have some beneficial effect on the fire spread and severity by stating that the system was designed to prevent flashover in the room of fire origin 1. Reference:
NFPA 13D: Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, 1975 Edition, Section 1-1 1 Fire Protection Handbook, 20th Edition, Volume 1, Chapter 8, Section 8.2.1.2 2
NEW QUESTION # 51
Which NFPA standard addresses industrial fire brigades fire-fighting capabilities?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 52
What type of process hazard analysis program addresses the prevention of flammable and hazardous materials released from containment?
- A. Fault tree
- B. Process safety
- C. Mechanical integrity
- D. Management of change
Answer: B
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 # 53
Sound meters used to test notification appliances in fire alarm systems shall comply with which standard?
- A. NFPA 70
- B. ANSI S12.13
- C. NFPA 72
- D. ANSI S1.42
Answer: D
Explanation:
Explanation
ANSI S1.4a
Sound meters used to test notification appliances in fire alarm systems shall comply with the standard ANSI S1.4a, Specifications for Sound Level Meters, Type 2 requirements, according to NFPA 72 2010, the National Fire Alarm and Signaling Code.This standard specifies the performance and accuracy criteria for sound level meters that are used to measure the sound pressure levels of audible signals in fire alarm systems1
NEW QUESTION # 54
How often must a smoke detector connected to a fire alarm panel be physically tested?
- A. Annually
- B. Monthly
- C. Quarterly
- D. Semiannually
Answer: A
NEW QUESTION # 55
The Chezy Formula used in hydraulic analysis requires all of the following information:
- A. Diameter of pipe, hydraulic radius and hydraulic slope
- B. Diameter of pipe, roughness of pipe, and hydraulic radius
- C. Diameter of pipe, roughness of pipe and hydraulic slope
- D. Roughness of pipe, length of pipe, and hydraulic slope
Answer: D
NEW QUESTION # 56
The maximum distance between hangers for an automatic fire sprinkler system for a threaded lightwall steel pipe of 2 in. diameter is
- A. 15 ft.
- B. 8 ft.
- C. 10 ft.
- D. 12 ft.
Answer: C
Explanation:
According to NFPA 13, Table 17.4.2.1 (a), the maximum distance between hangers for an automatic fire sprinkler system for a threaded lightwall steel pipe of 2 in. diameter is 10 ft. This is done to ensure that there are not long stretches of unsecured piping that could sag, leak, or break. The distance between hangers may vary depending on the type of pipe, the type of hanger, and the seismic design category of the building. Reference: NFPA 13, Table 17.4.2.1 (a); Hangers and Support of Sprinkler System Piping | NFPA | NFPA.
NEW QUESTION # 57
What type of process hazard analysis program addresses the prevention of flammable and hazardous materials released from containment?
- A. Fault tree
- B. Process safety
- C. Mechanical integrity
- D. Management of change
Answer: B
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 potential to 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.
NEW QUESTION # 58
The three primary mechanisms for conducting legally valid scene investigations are exigent circumstances, a search warrant, or:
- A. statutory authorization
- B. permission of the owner
- C. reasonable time frame
- D. investigator qualifications
Answer: B
NEW QUESTION # 59
The maximum discharge time permitted for halocarbon clean agent systems is:
- A. 60 seconds
- B. 30 seconds
- C. 5 seconds
- D. 10 seconds
Answer: C
NEW QUESTION # 60
The computer simu-lation egress model that is often referred to as the hydraulic model and also known as
- A. egress model.
- B. movement model.
- C. behavioral simulation model.
- D. single-parameter estimation model.
Answer: B
NEW QUESTION # 61
While oxygen is the most common oxidizing agent, which of the following is also an oxidizing agent?
- A. Sodium chloride
- B. Ammonia
- C. Potassium chlorate
- D. Nitrogen
Answer: A
NEW QUESTION # 62
The coefficient of discharge of a fire hydrant when the outlet is smooth and well-rounded outlet is?
- A. 0.90.
- B. 0.87
- C. 0.70.
- 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 # 63
The principle fuels used in a modern grain dryer are natural gas, vaporized liquid propane, and
- A. methane.
- B. hydrogen.
- C. gasoline.
- D. fuel oil.
Answer: D
NEW QUESTION # 64
......
NFPA CFPS Exam Syllabus Topics:
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
| Topic 6 |
|
Get Top-Rated NFPA CFPS Exam Dumps Now: https://pdfpractice.actual4dumps.com/CFPS-study-material.html