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Fire Engineer > LaBarbera Tips > Flashcards

LaBarbera Tips Flashcards

1
Q

What is ABS?

A

ABS is an electronic system designed to monitor wheel speed at all times and control wheel speed during braking.

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2
Q

In the event of an ABS malfunction, what happens to the ABS system?

A

In the event of a malfunction in the system, the ABS in the affected wheel(s) is disabled. That wheel still has normal brakes. All other wheels retain the ABS function.

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3
Q

How is system status communicated to the driver?

A

ABS system has a light which will remain on should there be a problem with the system.

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4
Q

If the ABS light is on, how are the brakes affected?

A

The braking system has normal function.

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5
Q

How often should the step air tank and the air brake tanks be drained?

A

Once per week, per the apparatus daily check sheet.

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6
Q

How many chassis air tanks do the apparatus usually have?

A

Our apparatus typically have 4 air tanks.

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7
Q

Where is the tank located that supplies the air for the drop down steps?

A

This tank is separate from the air tanks that supply braking, and is located on the right side above the right front wheel.

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8
Q

What are some of the consequences of not draining the tanks?

A

If the chassis air and step air systems are not properly drained at least once a week, slow operation of the systems will occur, as well as damage to the brake and step air components. Leaks will also develop due to the condensation and oil deteriorating the rubber and metal components.

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9
Q

What are the all steer control system modes?

A
  1. Front Steer mode
  2. Coordinated steering
  3. Fire ground mode
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10
Q

How many modes are there to Fire Ground Mode, and what are they?

A

There are 2 different modes in Fire Ground:

  1. Coordinated steering
  2. Crab steer
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11
Q

In both Coordinated Steering mode and Fire Ground Mode, how does the coordinated steering work?

A

When front wheel is turned past the dead band, the rear wheels turn proportionally in the opposite direction of the front wheels.

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12
Q

What is the dead band?

A

The number of degrees the front wheels must be turned to the right or left before the rear wheels also turn is referred to as the dead band.

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13
Q

How do the rear wheels move when in Fire Ground / Crab Mode?

A

When operating in the fire ground/crab steer, the rear wheels turn proportionally in the same direction as the front wheels to allow the vehicle to move sideways in a diagonal manner.

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14
Q

What is the maximum operating speed for Coordinated steer?

A

35mph

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15
Q

What is the maximum operating speed for Fire Ground Modes?

A

10mph

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16
Q

What ways are used to notify the driver that they are in Fire Ground Mode?

A

When selecting fire ground mode, the indicator light (located in the lower portion of the fire ground mode selector switch) comes on; and an audible alarm begins to cycle on-and- off, signaling that fire ground mode has been selected.

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17
Q

Name 5 factors which should be taken into consideration when leveling the aerial.

A
  1. The area around the apparatus must be clear for outrigger extension.
  2. When performing aerial operations, the outrigger stabilizer pads shall be used.
  3. Safety pins shall be used when the outriggers are set in position.
  4. Front axle brake lock valve shall be set.
  5. Use wheel chocks when possible
18
Q

What is the preferred setup for leveling the aerial?

A

The preferred set-up is an uphill position, with the rear outriggers supporting enough weight to remove the bulge from the rear tires. The front outriggers should be firmly planted on the ground, but leaving the front suspension compressed allowing full aerial operation.

19
Q

When the level is beyond a certain degree, what will the happen?

A

Anytime the apparatus is beyond 8 degrees from level, a warning will be displayed on the CZIC display and all control functions will be disabled.

20
Q

All moving parts for doors, latches and hinges should be lubricated using what?

A

A silicon lubricant should be used on all moving parts.

21
Q

What are the two ways ATC, or automatic traction control, works?

A
  1. If a drive wheel starts to spin, ATC applies air pressure to brake the wheel, thus transferring engine power to the other wheel with better traction.
  2. If all drive wheels spin, ATC will reduce engine torque to provide better traction.
22
Q

What does the ATC control light do when ATC has been activated?

A

The ATC indicator lamp will blink continuously when ATC has been activated. Toggling the switch will turn ATC off, as well as turning off the engine.

23
Q

When tilting the cab, how much gap should be left between the safety stay arm and the cylinder?

A

1/4” gap should be left.

24
Q

What is a possible consequence of tilting the cab on a non-level surface or incline?

A

Tilting the cab on an incline or non-flat surface may produce interference between components as the cab is lowered.

25
Q

How many gallons, and what class of foam, does each unit equiped with CAFS (Compressed Air Foam System) have?

A

Each unit has between 10-20 gallons of Class A foam on board.

26
Q

What are the three subsystems that make up a CAFS system?

A
  1. Water pump
  2. Air compressor
  3. Foam concentrate proportioner.
27
Q

What limitations does the CAFS compressor PTO have?

A

The CAFS compressor’s PTO will only operate when the fire pump is engaged. The compressor’s PTO engagement is also prevented if the air compressor pressure is above 30 psi. This can be seen on the air pressure gauge.

28
Q

When are CAFS systems engaged?

A

CAFS systems, no matter which type, are engaged at idle.

29
Q

The compressor system control panel has 5 functions:

A
  1. PTO/compressor engagement switch (on/off).
  2. PTO engaged indicator light.
  3. Compressor air gauge.
  4. Oil temperature gauge to monitor the oil temperature in the CAFS system. Operating temperature will run 165° to 210° Fahrenheit.
  5. An audible and visible warning in the event of high temperature. The alarm activates at 250° Fahrenheit.
30
Q

CAFS can be engaged in two different modes:

A
  1. foam mode - Automatic pressure balancer to match the compressor discharge pressure to the pump discharge pressure throughout a pressure range of 60 to 150 psi.
  2. Tools Mode - Fixed pressure to set the air pressure fixed for the use of air tools supply air, etc.
31
Q

Where should the compressor oil reservoir level be prior to operating CAFS system?

A

Compressor oil should show 1/4 to 1/2 way up the sight glass prior to operation.

32
Q

What does the CAFS system display when water flow either exceeds or is running below level required for 0.3%?

A

“HI FLOW” will be displayed when water flow exceeds the capacity of the pump to provide 0.3%.
“LOW FLOW” will be displayed when water flow is below the capacity of the pump to provide 0.3%

33
Q

What is the operating temperature for CAFS compressor?

A

compressor should run between 165 - 210 degrees. A audible warning and light will flash if temperature reaches 250 degrees.

34
Q

If compressor is overheating, what is most likely cause?

A

a clogged strainer is the most likely cause of overheating.

35
Q

When operating CAFS, water pressure should never exceed what pressure?

A

125 psi is the maximum water pressure CAFS should be operated at. Gating down to 70psi with discharge of 125psi allows optimum rpm, water pressure and cooling.

36
Q

How does the CATS eye system work?

A

The system attaches to the rear dual’s hub and allows air transfer from one tire to the other. Its single airing point fills both tires at once, making the job quick, clean, and easy.

37
Q

What do the three “stages” of the CATS eye represent?

A
  1. completely closed - tires are within 2% of recommended pressure and are equalized.
  2. partially open - pressure has dropped 5-6% (slow leak)
  3. completely open - pressure has dropped to 10% below recommended air pressure, and internal check valve has activated, sealing off good tire from leaking tire.
38
Q

How long should you wait to check the oil if the engine has just been stopped and is warm?

A

You should wait approximately 20 minutes prior to checking to allow oil to drain back into the pan.

39
Q

List 3 reasons why apparatus might be running hotter

A
  1. Radiator caps leaking and/or losing coolant
  2. Difficult to see coolant in sight glass
  3. Debris clogging the radiator
40
Q

How often should fire pump and related components be flushed

A

At a minimum, the fire pump and components should be flushed bi-weekly

Fire Engineer (7 decks)

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