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2020 Grade One Fire Engineer Technical Practice Chapter Exercise 25

点击量: Release time: January 9, 2020 11:16:45 Source: Global Online School Traffic:

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    [Abstract] 2020 first-level fire engineer exam preparation has begun, Global Network School has organized "2020 First-Class Fire Engineer Technical Practice Chapter Exercises" for you. For more test preparation materials, simulation test questions, and real questions over the years, please continue to pay attention to Global Online School First class fire engineer exam channel!

    Related recommendations: 2020 first-tier fire engineer technical practice chapter exercise summary

    1. A substation is the central point of contact between the provincial power network and the urban power ring network. With the development of power dispatching technology, the substation will gradually adopt fewer people or even unattended. Therefore, it is very important to use automatic fire protection systems in the substation . The station is equipped with two 220kV oil-immersed outdoor power transformers, which are standby for each other. In order to ensure their safe operation, a water spray fire extinguishing system is used for protection. The nozzles of the system should be selected ().

    A. Anticorrosive water spray nozzle

    B. Cone nozzle

    C. Add dust cover nozzle

    D. Centrifugal atomizing water spray nozzle

    2. The design of the fine water mist fire extinguishing system should comprehensively consider factors such as the fire danger of the protected object and its fire characteristics, protection objectives and environmental conditions, and reasonably select the type. In the following places, the open system that is not suitable for local application is ().

    A. Turbine Room

    B. Diesel generator room

    C. Hydraulic station

    D. Oil immersion chamber

    3. Gas fire extinguishing system is one of the traditional four fixed fire extinguishing systems (water, gas, foam, dry powder), which is widely used in industrial and civil buildings, mainly used to extinguish communication facilities, valuable and precision equipment, electrical circuits, Fires in power distribution facilities, generator sets, etc. The application of gas fire extinguishing systems is becoming more and more widespread, and its safety issues are becoming increasingly prominent. The toxicity of fire extinguishing agents is mainly for personnel in the protective area. In a protective area designed in a fully submerged manner, there are requirements for evacuation before the fire extinguishing agent is released. The protection area where the gas fire extinguishing system is installed shall be provided with evacuation passages and safety exits so that personnel in this area can evacuate from the protection area within () min.

    A.0.5

    B.1

    C.5

    D.10

    4. Fluoroprotein foam Because the fluorocarbon chain in the fluorocarbon surfactant molecule has both hydrophobicity and strong oleophobicity, it can form a water film on the interface of the foam and oil, and can also drop oil Wrapped in foam prevents oil from evaporating and reduces the flammability of oily foam. Therefore, when spraying fluoroprotein foam under liquid to extinguish a gasoline tank fire, a special high back pressure foam generator must be used. The following expansion ratios are generated by the high back pressure foam generator ().

    A.3

    B.13

    C.30

    D.300

    5. In fire protection design, the fire resistance rating of a building is determined by the combustion performance and fire resistance of the main components such as the walls, columns, floor slabs and suspended ceilings that make up the building. For a three-level fire-resistant senior building, when the ceiling is made of flame-resistant materials, its fire resistance limit should not be lower than ().

    A.0.50h

    B.0.25h

    C.0.15h

    D.0.10h

    6. The automatic fire alarm system is an automatic fire protection facility that realizes early detection and alarm of fires, sends control signals to various fire protection facilities, and receives equipment feedback signals. The following divisions of the detection area and the alarm area of the automatic fire alarm system that do not meet the requirements of the specification are ().

    A. The alarm area can be divided by floor, and adjacent floors that need to be linked with fire protection equipment at the same time when a fire occurs can be divided into an alarm area.

    B. The alarm zone of a highway tunnel is 200m

    C. An external floating roof storage tank with a volume of 50000m³ is independently divided into an alarm area

    D. In a large space building, the length of the detection area of the infrared beam smoke fire detector is 100m

    7. In the design of subway fire protection, mechanical smoke prevention and exhaust facilities shall be provided in the halls and platforms of underground stations, fully enclosed driveways, smoke-proof stairwells and front rooms, and sections with a length greater than ().

    A.100m

    B.200m

    C.300m

    D.400m

    See answer

    Reference answer: DCAABBC

    The editor reminds you to avoid missed 2020 exam registration, payment, eligibility review, etc., you can book SMS reminders for free

    ”页面进行下载学习。 Global Network Alumni Tips: The above is the "2020 First-Class Fire Engineer Technical Practice Chapter Exercise" organized by the Global Network School Fire Engineer Channel for you. For more simulated test questions, real questions over the years, high-frequency test sites, test preparation strategies, please click below " Free Download "page for download learning.

    share to: Edit: Sun Qing

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