Timing in Radio and Truss Failure
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Questions and Answers

What is the initial percentage setting for foam to use when cleaning hydrocarbons if unsure?

  • 6%
  • 10%
  • 3% (correct)
  • 1%

    • What should be done if the natural gas reading is at 10% or higher?

  • Ignite the gas to disperse it.
  • Enter the area and investigate.
  • Call in a Level 1 response. (correct)
  • Turn off all electrical devices.

    • If over 25% of a gas and air mixture is present, what is the recommended action?

  • Turn off rigs. (correct)
  • Evacuate the site without notifying anyone.
  • Use a fire extinguisher immediately.
  • Increase ventilation.

    • How much structural deterioration qualifies a building for a Red X designation?

    <p>30%</p> Signup and view all the answers

    What percentage of heat loss is attributed to the head?

    <p>60%</p> Signup and view all the answers

    What is the annual total death count related to confined space rescues and their victims?

    <p>54 deaths</p> Signup and view all the answers

    What is the appropriate action if more than half of the outer yarns on a kernmantle rope are worn out?

    <p>Retire the rope</p> Signup and view all the answers

    What is the average radiation exposure for a person in Chicago per day?

    <p>1 mR</p> Signup and view all the answers

    How long does it take to make a complete stop at an intersection?

    <p>2-3 seconds</p> Signup and view all the answers

    Which level of radiation exposure requires evacuation of civilians?

    <p>5-10 R</p> Signup and view all the answers

    What is the maximum time you should wait for OEMC to answer from your initial call before repeating?

    <p>15 seconds</p> Signup and view all the answers

    What does a radiation meter chirp indicate?

    <p>Low battery</p> Signup and view all the answers

    How long does an air horn need to sound in short bursts during an emergency evacuation?

    <p>30 seconds</p> Signup and view all the answers

    What is the display duration when hitting the light button on the 600XE radio?

    <p>15 seconds</p> Signup and view all the answers

    What is the distance required to keep from the collapse zone of a building?

    <p>100 feet</p> Signup and view all the answers

    What is the warm zone distance from a hot zone?

    <p>300 feet</p> Signup and view all the answers

    At what temperature does the body reach 106 degrees during work?

    <p>20 minutes</p> Signup and view all the answers

    How long does it take for tanks to equalize after using a transfill hose?

    <p>30-60 seconds</p> Signup and view all the answers

    What type of injury is caused by the primary blast wave?

    <p>Primary injury</p> Signup and view all the answers

    What is the soaking time for the outer jacket/pants for blood exposure?

    <p>10 minutes</p> Signup and view all the answers

    What is the safe distance from the flame of propane for emergency responders?

    <p>4X height of the flame</p> Signup and view all the answers

    How long does it typically take to cut a 4’X4’ hole in a steel truss bar roof?

    <p>15 minutes</p> Signup and view all the answers

    Which is the optimal angle for using an aerial?

    <p>70 degrees</p> Signup and view all the answers

    What is the recommended distance the bottom of a ladder should be from the building?

    <p>1/4 of the height of the ladder</p> Signup and view all the answers

    What percentage of foam solution should be used for hydrocarbon fires?

    <p>6%</p> Signup and view all the answers

    What is the maximum distance a roof ladder should extend above the roof?

    <p>5 rungs</p> Signup and view all the answers

    What is the effect of temperature on foam behavior?

    <p>Under 35 degrees, foam can separate.</p> Signup and view all the answers

    For a 24-foot raise, how far should the heel be pulled out from the bottom?

    <p>1 foot 6 inches</p> Signup and view all the answers

    What is the purpose of using the HF 350 nozzle?

    <p>To mix foam efficiently with various settings.</p> Signup and view all the answers

    What is the common smoke color associated with polar solvents during a fire?

    <p>White/light smoke</p> Signup and view all the answers

    What is the maximum height that new telescoping hydraulic pistons can reach in elevators?

    <p>8 FLRs</p> Signup and view all the answers

    What type of fire door is required for hoistway doors on each floor?

    <p>Class B fire door</p> Signup and view all the answers

    For buildings taller than 275 feet, how are the standpipes organized?

    <p>Every 20 FLRs is a separate zone</p> Signup and view all the answers

    Regarding Class 2 standpipes, what is a key characteristic?

    <p>It's a single jacket, twist on/off pipe</p> Signup and view all the answers

    Under which condition are standpipes not required?

    <p>On the first floor</p> Signup and view all the answers

    What must the access door on top of the elevator car be sized at minimum?

    <p>400 square inches</p> Signup and view all the answers

    What is the minimum pressure required for standpipes designed for buildings at least 80 feet tall?

    <p>65 psi</p> Signup and view all the answers

    What equipment is included in a Hi-Rise Bag?

    <p>1 National Standard thread and 1 inline gauge</p> Signup and view all the answers

    Study Notes

    Time Management and Safety Protocols

    • Complete stop at an intersection requires 2-3 seconds.
    • Pre-speak monitoring on the radio should last 3 seconds.
    • The 5000R radio display stays lit for 5 seconds post light activation.
    • 1st component failure in a truss plate leads to total collapse in 7 seconds.
    • 10 seconds to activate the display on the 7000R radio.
    • Inhaling during APR negative tests should take 10 seconds.
    • The 600XE radio display remains lit for 15 seconds after activation.
    • OEMC reply wait time is 15 seconds; repeat 3 times if no response.
    • Rabbet tool requires 20-30 seconds to open a door.
    • Emergency evacuation air horn signals should last 30 seconds in short bursts.
    • Tank equalization post transfill hose takes 30-60 seconds.
    • Setup of facepiece, hood, and helmet under 45 seconds is essential.
    • Steel truss roofs can fail within 5 minutes if subjected to fire.
    • RIT updates every 5 minutes when deployed to assist a firefighter.
    • Soaking time for outer gear against blood exposure is 10 minutes.
    • Trains may take over 11 minutes to stall; power should be turned off.
    • Cutting a 4’x4’ hole in steel truss roofs requires 15 minutes.

    Temperature and Health Implications

    • Working in bunker gear for 17 minutes leads to dehydration and circulatory stress.
    • Body temperature can reach 106 degrees within 20 minutes of work.
    • Minimum rehab time is 20 minutes; seek hospital if unable to recover after 2 cycles.
    • Two floors of burning 2-inch lumber can cause collapse in 20 minutes.
    • 30-minute HazMat suit work requires rehab; in training, the duration is extended.
    • Updates from a controlled fire should be communicated every 30 minutes.
    • Rope needs a 30-60 minute soak in a water/soap mix for cleaning.
    • Working longer than 45 minutes without rehab leads to performance decline.

    Radiation and Safety Measures

    • Radeye runs on AAA batteries, offering approximately 600-hour lifespan.
    • Background radiation in Chicago averages 0.01-0.04 mR; daily exposure is around 1 mR.
    • Emergency actions triggered at 5-10R for civilian evacuations; FS&R limited to search & rescue.
    • 25-100R zones demand restrictive entry; approval required from the Incident Commander.
    • Radiation detected from a distance of 3 feet for Transport index assessments.

    IED Safety Protocols

    • Maintain a distance of 100 feet from IED collapse zones.
    • Hot zone established at 300 feet; radios and cellphones should be turned off.
    • Secondary explosions most likely occur 30-100 minutes post initial detonation.
    • Primary injuries from blasts, secondary from flying objects, and tertiary from shockwaves.
    • ELEVATOR use becomes significant during emergencies; alarms dictate response protocols.

    Hose and Standpipe Regulations

    • Standpipe systems required for buildings over 80 feet or 4 stories.
    • Minimum water delivery of 500 gpm at 65 psi mandated for standpipes.
    • Standpipes in newly constructed buildings should be installed 2 floors below the highest floor.
    • Class 1 and 3 standpipes use 2.5-inch connections; Class 2 line is 1.5 inches and not used.

    Hi-Rise Bag Specifications

    • A national standard thread, inline gauge, and both double female and male couplings are included.
    • Essential tools: shove knife, wire brush, extra valve wheels, and door chocks.

    Foam Techniques and Applications

    • Foam proportions: 3% for hydrocarbons (black smoke), 6% for polar solvents (white smoke).
    • Charge lines at 200 psi for effective foam production.
    • 5 gallons of foam at 3% generates about 30-80 seconds of foam application depending on equipment.

    General Safety and Abbreviations

    • 60% of new constructions utilize truss roofs emphasizing structural concerns.
    • Abbreviations for leave and duty include AN (Absence without Pay), JD (Jury Duty), and others relevant for operational management.

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    Description

    This quiz covers critical timing intervals related to radio usage and truss plate failures. Test your knowledge on how long various systems remain active or stable before critical failures occur. It is essential for understanding safety protocols and operational efficiency.

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