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NEW QUESTION # 32
Which of the following best describes the reason many issues in building codes and other for the built environment have historically been addresses?
- A. Risk values
- B. Major incidents
- C. Number of fires
- D. Rate of Fires
Answer: B
NEW QUESTION # 33
In what year between 1980 and 2002, did the worst civilian injuries in industrial and manufacturing property structural fires occur?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
NEW QUESTION # 34
In heal transfer the amount of thermal energy required to raise a unit mass of a substance by 1 degree is expressed as which of the following?
- A. British thermal unit
- B. Latent heat
- C. Heat density
- D. Specific heat
Answer: D
NEW QUESTION # 35
How often should an electric fire pump be inspected and tested, and for how long should it run during testing?
- A. Inspected and testes monthly, run for 30 minutes
- B. Inspected and tested weekly, run for 30 minutes
- C. Inspected and tested monthly, run for 10 minutes
- D. Inspected and tested weekly, run for 10 minutes
Answer: A
NEW QUESTION # 36
What is the maximum allowable sound pressure level (SPL) for a fire alarm system?
- A. 130 dBA
- B. 100 dBA
- C. 30 dBA
- D. 50 dBA
Answer: B
Explanation:
Explanation
According to NFPA 72, the maximum sound pressure level (SPL) for a fire alarm system is 110 dBA at the minimum hearing distance from the audible appliance1.However, this limit can be exceeded if the sound pressure level measured 2 000 mm above floor level is not more than 100 dBA2. Sound pressure level is a measure of the intensity of sound at a given point in space, expressed in decibels (dB). The higher the SPL, the louder the sound.For comparison, a normal conversation is about 60 dB, a jet engine is about 140 dB, and a gunshot is about 160 dB3.References:Sound Pressure Levels - NFPA;NFPA fire alarm sound level - EntirelySafe.com;Subsection 907.5 - Occupantnotification systems - Casetext;How Loud Is a Fire Alarm In Decibels (dB)? With Noise Comparison Chart;The Ontario Building Code | Audibility of Alarm Systems.
NEW QUESTION # 37
Shopping malls, schools, and stadiums are examples of ________ targets.
- A. ecoterrorism
- B. civilian
- C. infrastructure
- D. symbolic
Answer: B
NEW QUESTION # 38
What kind of agent is anthrax?
- A. Neurotransmitter
- B. Blood agent
- C. Chemical asphyxiant
- D. Infectious disease
Answer: B
NEW QUESTION # 39
Foundations for water tanks and towers should be built of concrete with compressive strength of NOT less than how many psi?
- A. 2,000
- B. 3,000
- C. 4,000
- D. 5,000
Answer: B
Explanation:
NEW QUESTION # 40
Probabilistic fire models are categorized into all of the following EXCEPT
- A. behavioral.
- B. statistical.
- C. network.
- D. simulation.
Answer: C
Explanation:
Probabilistic fire models are categorized into network, statistical, simulation, and behavioral models. Network models use graph theory to represent the fire spread and the fire protection system in a building. Statistical models use historical data and probability distributions to estimate the likelihood and consequences of fire scenarios. Simulation models use mathematical equations and numerical methods to describe the physical and chemical processes of fire and its effects on the environment and the occupants. Behavioral models use psychological and sociological theories to predict the human response and evacuation behavior in case of fire. Network models are not a common category of probabilistic fire models, and they are not mentioned in the sources provided by the user. Therefore, network models are the correct answer.
NEW QUESTION # 41
What is the background color used from the source to the outlets of a nitrous oxide medical gas system?
- A. Yellow
- B. Black
- C. Gray/black
- D. Blue
Answer: D
Explanation:
Explanation
The background color used from the source to the outlets of a nitrous oxide medical gas system is blue. This is the standard color coding for nitrous oxide cylinders and pipelines in medical gas pipeline systems12. The color coding helps to identify the gas type and prevent accidental misconnections or cross-contamination3. The color coding also indicates the pressure and flow characteristics of the gas system4. References:
Colour coding of copper pipes in Medical gas pipeline system according ...
Doc 177 20 Medical Gas Cylinders Colour Coding - EIGA
Medical Gas Coding Color Chart & Explanation - Bay Corporation
Medical gases Health Technical Memorandum 02-01: Medical gas pipeline ...
NEW QUESTION # 42
The thermal inertia of a material is defined as the:
- A. direct onset of self-sustained combustion
- B. minimum combustion rate a solid material must attain in order to ignite under testconditions
- C. ignition energy of a material based on the quantity of heat energy per unit
- D. direct product of thermal conductivity, density, and heat capacity
Answer: C
NEW QUESTION # 43
The minimum residual pressure for a municipal water supply, according to the American Water Works Association (AWWA), defines the required fire flow at:
- A. 25 psi (172 kPa).
- B. 20 psi (138 kPA).
- C. 10 psi (69 kPa).
- D. 15 psi (103 kPa).
Answer: C
NEW QUESTION # 44
There are three components of the means of egress exit, exit access and____.
- A. Horizontal exit
- B. Exit corridor
- C. Exit discharge
- D. Vertical exit
Answer: C
NEW QUESTION # 45
The ignition temperature of acetylene gas is
- A. 350° F (177° C).
- B. 325° F (163° C).
- C. .581° F (305° C).
- D. 425° F (218° C).
Answer: C
Explanation:
Explanation
Acetylene
Explore
The ignition temperature of acetylene gas is 581° F (305° C). This is the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present. The ignition temperature of acetylene gas varies according to composition, initial pressure, initial temperature, and water vapor content.As a typical example, an air mixture containing 30 percent acetylene by volume at atmospheric pressure can be ignited at about 581 °F (305°C)1.
References:Fuels and Chemicals - Autoignition Temperatures - The Engineering ToolBox;Ignition Temperatures and Group Classifications for Flammable Gases and Vapors;Is Acetylene Flammable? - Firefighter Insider;Ignition temperature acetylene - Big Chemical Encyclopedia;Acetylene Gas- its Characteristics and Safety Requirements
NEW QUESTION # 46
The dynamics of compartment fire growth are characterized by type of combustion process, growth rate, ventilation, and:
- A. fire stage
- B. flame pattern
- C. fuel type
- D. heat content
Answer: B
NEW QUESTION # 47
What percent CO2 by volume is the minimum concentration used in total flooding systems?
- A. 38 percent
- B. 40 percent
- C. 34 percent
- D. 36 percent
Answer: C
NEW QUESTION # 48
In the plastics industry, which one of the following is NOT one of the four broad areas of processing?
- A. Polymerization
- B. Conversion
- C. Finishing
- D. Manufacturing
Answer: D
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 # 49
Which of the following is produced by pyrolysis and/or incomplete combustion of organic materials and is referred to as an organic irritant?
- A. Argon
- B. Hydrogen
- C. Cyanide
- D. Formaldehyde
Answer: C
NEW QUESTION # 50
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