jatc 1b EXAM NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW VERSION!!

jatc 1b EXAM NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW VERSION!! List and describe the 5 main limitations or barriers to all radio transmissions. - Answer- Distance- The distance the signal will travel depends on the power of the transmitter and receiver radio and the height of the broadcast and receiving antennas. Repeaters can be used to increase the area of coverage. Static and broken messages are an indication that the receiver is near the limit of the transmission range. Physical barrier- Any physical barrier between the transmitter and the receiver can block the signal. The signal may be totally blocked, partially blocked, or reflected. Units working within tunnels, basements, or structures may be able to communicate with each other using the talk-around function, but they may not be able to talk to the IC or the telecommunications center. Your body can act as a physical barrier and you may need to reposition yourself to see if your signal can be sent, especially while working within a structure. To overcome physical barriers, you may need to turn your body 90 degrees, lift the portable radio higher, or raise the antenna up straight. List and describe the 5 main limitations or barriers to all radio transmissions. - Answer- Dead zones- Dead zones are remote areas or locations inside structures that cause the loss of cellular telephone service or radio signals. Repeaters may have been installed in buildings to eliminate dead zones within the building. Moving to an outside wall, roof, window, or doorway in a structure can improve reception. Inspectors or other fire personnel should perform radio checks during preincident planning surveys to verify that radios can be used in all areas of the building. In large metal and concrete buildings, radios may not work, and runners or other means of communication may be required. Direct communication may still be possible within dead zones. Interference- Interference can originate from various sources. Sources of interference may include but are not limited to: • Another powerful radio signals • Vehicle ignitions • Electric motors • Computers • Cellular telephone towers or transmitters • High-voltage transmission lines • Equipment that contain microprocessors • High-power radio sites such as television and radio stations Ambient noise- Emergency scenes are filled with ambient noise that can make radio communications difficult. New technology has developed noise-canceling microphones that may help. Each mobile or portable radio operator is responsible for overcoming ambient noise at a scene. The following are some ways to overcome ambient noise: • Turn off apparatus audible warning devices when they are no longer needed. • Move away from noise-emitting equipment when transmitting. • Follow radio procedures at all times. • Move to a location that blocks wind noise. • Use your body or PPE to create a wind barrier when transmitting. List 9 common building materials. - Answer- 1. Wood 2. Metal 3. Masonry 4. Lath and Plaster 5. Plastic 6. Reinforced concrete 7. Composites 8. Fiberglass 9. Gypsum(drywall) List the factors that should be considered when trying to determine the potential for structural collapse. - Answer- Renovations Alterations weather construction type length of fire exposure building contents additions age of structure loads placed on the structure building condition stage of fire List and describe the 4 limiting factors that affect the reach of a fire stream. - Answer- Gravity- it limits the vertical and horizontal distance the hose stream will travel. It also causes solid streams to separate and lose their compact shapes. Velocity loss- water loses velocity as it travels, so if there is insufficient starting pressure, the reach of the hose stream will be limited. Water droplet friction with air (drag)- air friction affects the water droplets in a fog stream more than it does the outer surfaces of a compact solid steam. As a result, for nozzles with the same psi and flow rate, solid streams have the longest reach. Wind- wind direction and speed can shorten the reach and deteriorate the shape of the hose streams. The negative effect increases on fog streams. What are the general ways that the five construction types collapse? - Answer- Type I Collapse: Type I construction high-rise buildings are not likely to collapse, making the primary concern the hazard of flying glass from windows or curtain walls. If it does collapse, will be localized and not structure wide. Type II Collapse: Consists of unprotected steel or noncombustible supports, such as I-beams. When exposed to temperatures above 1,000F, unprotected steel will expand and twist, pushing out walls, and when cooled, will slightly constrict. These movements will cause floors and walls to collapse. Construction that includes brick and block walls supporting unprotected steel bar joists and I-beams are prone to these types of collapse. Type III Collapse: Masonry construction walls can collapse in one piece or crumble. The debris can travel some distance and cause the collapse of other structures or objects. Type IV Collapse: Heavy-timber or mill construction is one of the least likely to collapse. The weight of bearing capacity of the large- dimension wood members will resist collapse unless they have been affected by a large volume of fire. Type V Collapse: Walls may collapse inward or outward. Plan for a collapse zone at any fire incident with a Type V building. Exterior masonry and veneer walls that are not load-bearing get placed over load-bearing wood walls. Brick veneer attached to the frame can fall straight down (curtain collapse) into a pile or fall straight out as a unit as the ties and supports fail. Although rare for a Type V to collapse outward, interior collapses pose a great danger to FFs. Lightweight trusses and engineered floor systems can fail in List the collapse hazard during a basement fire. - Answer- - Fuel Loading, especially the fuel load on the floor above the basement - Age of exposed joints - Hidden paths for fire in walls and ducts that could be exposed in basements - Use of lightweight construction materials that are susceptible to rapid collapse process used for notifying a hospital prior to transporting a pt to its facility. A proper short report - Answer- Call the hospital's charge nurse line Give them a short report with ETA - Age/gender of pt - Chief Complaint - pertinent positives/negatives - Vitals - ETA