Question 6 of 46

During which stage of a fire would the heat release likely to be controlled by the fuel package size and geometry (i.e. the surface area likely to burn)?

    Correct Answer: C

    The heat release is likely controlled by the fuel package size and geometry during the Steady-state Stage. At this stage, the fire has reached a consistent burning rate, and the rate of heat release is predominantly influenced by the available fuel and its configuration.

Question 7 of 46

Which of the following materials is considered by NFPA to be a Group A plastic?

    Correct Answer: A

    According to the National Fire Protection Association (NFPA), Group A plastics are materials that generally include most thermoplastics with a tendency to burn readily. Butyl rubber fits this category as it is a synthetic rubber that can be easily ignited and continues to burn. Hence, of the given options, butyl rubber is considered by NFPA to be a Group A plastic.

Question 8 of 46

Which of the following refrigerants has the highest flammability, according to its Safety Group classification?

    Correct Answer: D

    Methane is classified under Safety Group A3, which indicates high flammability, according to ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) standards. In contrast, Octaflouropropane and Difluoromethane are less flammable, and Methyl Chloride, while being flammable, does not have the highest flammability compared to Methane.

Question 9 of 46

In assessing the use of a sprinkler head with a Nominal K-Factor of 14.0, you find that this sprinkler head provides what percentage of the flow from a Nominal K-Factor 5.6 sprinkler device?

    Correct Answer: C

    To determine the flow rate comparison between two sprinkler heads with different K-Factors, you can use the relationship that flow (Q) is proportional to the K-Factor for a given pressure. Therefore, the ratio of the flows for two sprinkler heads is equal to the ratio of their K-Factors. A K-Factor of 14.0 compared to a K-Factor of 5.6 gives a ratio of 14.0 / 5.6 = 2.5, which means the 14.0 K-Factor sprinkler provides 250% of the flow of the 5.6 K-Factor sprinkler.

Question 10 of 46

The driving force behind every inspection, testing, and maintenance program for fire alarm systems is to:

    Correct Answer: B

    The primary goal of any inspection, testing, and maintenance program for fire alarm systems is to ensure that the system is reliable and functions correctly when needed. Making system reliability as high as possible ensures that the fire alarm system will perform its intended function of detecting and alerting occupants to a fire, thereby enhancing overall safety.