Pre-Trip Flashcards

Question

What to do before and after off-roading

Answer 1

BEFORE: - secure cab equipment - turn on headlights - Turn off engine brake - engage 4WD - consider LCES AFTER: - Check underneath and between duals - Disengage 4WD - turn on engine brake

Answer 2

2. 3 feet per 1 psi of vacuum * 2.3 x 14.7 = 33.9 or “max theoretical lift” at sea level - can’t get this cause of friction loss in intake hose, strainer, energy needed to move water, and not a perfect vacuum - lose 0.5 inch psi in atmospheric pressure every 1.000 feet elevation (example: 12.2 psi at 5000’ elevation)

Answer 3

- elevation pressure increases - less friction loss can be overcome - capacity of pump decreases

Answer 4

10 Less increase pump capacity and more decreases capacity

Answer 5

33.9’ 25’ : all available atmospheric pressure used to get 25’ but not useful lump capacity for pumping operations 20’: maximum for effective fire stream (60% pump capacity)

Answer 6

Inches of mercury x 1.13 Example: 14 Hg 14Hg x 1.13 =!15.82 or about 16’

Answer 7

Lift in feet + Intake hose FL _____________________________ 2.3

Answer 8

7.5 x L x W x depth

Answer 9

Total Friction Loss + or - Head Pressure —————————————————— Max Pump Pressure (250) - Min Intake Pressure (20) TFL + or - Head Pressure ———————————— 230

Answer 10

Wheels/tires/lug nuts/brakes Steering system/suspension/Springs/shocks/hosed Controls Any part of brake test

Answer 11

Air compressor Air compressor governor (determines cut-in and cut-out) Check valves: prevent air tanks from leaking Safety valve: in first tank protecting system in event of overpressurization Air storage tanks Air dryer/evaporator Air tank drains

Answer 12

Over-braking: braking too hard and Locking up the wheels Over-steering: turning the wheels more sharply than vehicle can turn Over-acceleration: supplying too much power to drive wheels causing them to spin Driving too fast for road conditions

Answer 13

Products of combustion leave exhaust manifold including particulate matter and NOx. Particulate mater is trapped in the DPF while NOx continues down the exhaust and meets DEF. DEF hydrolysis into ammonia has continuing to mix with exhaust. The ammonia and NOx enter the selective Catalyst Reduction device (SCR) and under heated conditions reacts to produce nitrogen and H2O which is released isn’t the atmosphere.

Answer 14

Parked: DPF light will illuminate solid, will flash if not regened within 8-10 running hours, check engine will illuminate if ignored further, finally will have blinking DPF, solid check engine and solid stop engine light. * cycle parking brake on/off, cycle transmission to drive then neutral, hold Regen switch for 5 seconds * DPF light illuminates for 1 second then stays off. RPM increases to 1100. HEST light illuminated when gets to temp * takes 20-40 minutes

Answer 15

1/4-full (4.5 gallon tank): no light 1/8-1/4: Low solid DEF light < 1/8: DEF Low light will flash * with <1/4 tank, flashing DEF, and check engine light lose 25% torque and govern at 55 MPH * DEF Tank Empty: DEF light flashing, check engine light, malfunction lamp (MIL) on * Empty tank ignored stop engine light and 5 MPH speed limit

Answer 16

2013 Arrow XT Pierce weighing 44,000 pounds, is 9’8” tall, 10’ wide, and 29’ 3” long. It is powered by an inline 6 cylinder Mercedes DD13 motor producing 500 horsepower at 2080 RPM and 1650 ft torque at 1200 RPM with compression ratio of 17:1. There is a required Regen system installed for emission compliance. Top speed 68 MPH Power is transferred to an Allison 4000PR 6 speed transmission equipped with a trans retarder The midship Pump is a HALE QMAX 150 that is rated to 1509 GPM at 150 PSI from draft and has a 500 gallon tank. There are 4 intakes and 12 discharges with 8 being foam capable. The foam pump is controlled from a FoamPro 2001 automatic proportioning, Direct Injection pump from a 25 gallon class A foam tank. The engine is stopped with the assistance of a brake retarder and 4 disc brakes with automatic adjusting slack adjusters. There is also front end independent suspension utilizing control arms and torsion bars. SAFETY systems: interlock with raising the cab, seatbelt monitoring system, rear and right camera display, Video Data Recorder which records last 100 hours.

Answer 17

Battery switch Emergency brake engaged (interlock system)

Answer 18

Pressure mode: keeps constant discharge pressure by varying RPM of motor RPM mode: maintains constant RPM while still monitoring pump discharge pressure. Discharge pressure is limited to an increase of 30 psi.

Answer 19

2013 KME Workstar 35,000 pounds 9’11” high, 26’4” long, 10’ wide 330 HP 9.3 liter International Max Force 9 motor with 950 lb-ft of torque. 17:1 compression ratio 70 gallons of diesel, 27 quarts of oil Transmission Allison 3000 EVS 5 speed HALE single stage pump 750GPM at 150psi with PumpBoss Pressure governor from 500 gallon water tank 20 gallon foam tank using the FoamPro 2001 Automatic proportioning, direct injection foam pump capable of pumping from 0.1%-10% Has auxiliary Waterous E501A Pump for pump and roll operations rated for 110GPM at 100 psi. HALE oilless, rotary vane positive displacement priming pump for both pumps Solid front and rear axle suspension with 4WD capabilities. Can engage 4 high < 5 mph and 4low capable. Tires at 120 psi all around Winch has 90’ of 7/16” steel cable rated to 16,500# with controls in rear of vehicle.

Answer 20

2008 Placer with International Navistar 7400 SFA 4x4 body 35,000 pounds 8’4” wide, 9’9” high, 25’6” long 335 HP turbocharged International DT570 motor that Yields 950 lb-ft of torque with 17:1 compression ratio and engine brake Power is transferred to a 5-speed Allison EVS transmission Holds 70 gallons of diesel HALE single stage centrifugal Pump rated to 750 GPM at 150psi Auxiliary Waterous E501A pump for pump and roll operations rated to 110GPM at 100 psi HALE oilless rotary vane priming Pump for both pumps 500 gallon water tank 20 gallons of foam utilized by an automatic proportioning, direct injection FoamPro 2001 electric foam pump. Solid front and rear axles with front/rear differentials that can be placed into 4WD through engagement of front axle Warn 16.5 Ti winch with 16,500# capacity has 90’ of 7/16” steel cable.

Answer 21

Horsepower is measurement of work over time. Specifically the time to lift 33,000 pounds one foot in one minute. Torque is rotational force made by the crankshaft. Diesels have high torque making them better in moving loads under lower RPM

Answer 22

Wheels/tires/lug nuts/brakes Steering system/suspension/Springs/shocks/hosed Controls Any part of brake test

Answer 23

12-15 seconds

Answer 24

Before After your turn signal is on Right when you start the change After completion of lane change

Answer 25

Signal early Signal continuously: keep both hands on steering wheel canceling only after completing the turn Cancel your signal

Answer 26

1 second per 10’ of vehicle length at speeds < 40 MPH Add one second for speeds > 40 MPH Example: engine 131 is 30’ which means 3 seconds of space < 40 mph and 4 seconds > 40 MPH

Answer 27

``` 2 4 10 18 26 46 ```

Answer 28

``` 2 3 5 7 8-18 every 10psi from 200-300gpm ```

Answer 29

``` 5 10 18 28 41 ```

Answer 30

1.5 horsepower, 4 stroke, single cylinder, air cooled Pump single stage centrifugal pump 55 GPM at 60 psi 0.68 quarts of fuel .11 quarts 10w30 Max lift 120’ 2.5 GPM required min. to prevent overheating

Answer 31

``` Take charge Motivate: “can do safely attitude” Demonstrate initiative Communicate: through specific directions and asking for feedback Supervise at scene of action ```

Answer 32

Provide firefighters with clear understanding of their intent for the assignment: Task: what is to be done Purpose: why it is to be done End state: how it should look when it is done

Answer 33

Two modes: pressure and RPM 300 PSI sensor on pump discharge RPM mode limits increase of 30 PSI in pressure Preset: RPM mode is 1000; PSI mode is 115 psi Max RPM 2100

Answer 34

Oil Pressure: 10-100 psi Temperature: Engine Coolant 130-240 Transmission Temp: 140-300 Battery Voltage: 11.5 - 15.5

Answer 35

No water less than 15 PSI discharge ENGINE WILL IDLE. Must be corrected within 3 minutes Low Water if Discharge less than 45 psi but more than 15 sets RPM to 1100. After 7 seconds will idle.

Answer 36

Sets maximum RPM at 1500 when discharge pressure is less than 100

Answer 37

Drive with due regard for safety “Immediate response to a call for emergency assistance utilizing warning lights and sirens” -would a reasonable person carry the same actions in a similar situation?

Answer 38

Emitter, detector, phase selector

Answer 39

Reportable incident: any accident involving damage to city vehicle cause by vandalism, theft, or acts of nature Reportable accident: any accident incoming city or personal vehicle while performing city duties that results in death, bodily injury, or property damage. ***notify PD and fill out form for all reportable accidents

Answer 40

3 reasons: Reportable incident, reportable accident, collision in person vehicle while conducting city business 4 steps: Stop safely: render aid, leave vehicles at point of rest, notify supervisor Notify PD for injured persons Locate witnesses: get all their info Identify yourself and give your info, do not discuss collision or admit guilt

Pre-Trip Flashcards

(65 cards)