*Bk 6- AOTM Flashcards
AOTM- _____ occurs when an engine is operating below recommended operating range
Lugging
AOTM- The engine lubrication system generally used in fire apparatus is the _______ lubrication system.
Full Force-feed lubrication system
AOTM- The purpose of _______ is to transmit power of the engine to the wheels.
Power train
AOTM- A ________ is a flexible coupling between two shafts that permits one shaft to drive another at an angle to it
Universal joint
AOTM- The ______ provides the necessary telescopic action for a driveshaft
Slip joint
AOTM- The __________ permits a difference of rotational speed of the axles
Differential
AOTM- The function of the __________ is to change the direction of the power transmitted by the driveshaft through 90° to the driving axels. It is found between the driveshaft and the differential.
Final drive
AOTM- A _____ axel is one that supports part of the weight of a vehicle and also drives the wheels connected to it.
live axle
AOTM- A ______ axel is one that carries part of the weight of a vehicle but does not drive the wheels.
Dead axel
AOTM air brakes- The air compressor operates continuously while the engine is running, but the actual compression of air is controlled by the _____.
Governor
AOTM Spotting Aerials- In the downtown area the curbs are approximately _____ feet from the building line.
11 ft
AOTM Aerial Spotting- To compensate for excessive street grades, spot the aerial apparatus ____(up or down) slope from the area of operation.
This prevents rung tilt and improves the stability of the aerial
Down slope
AOTM Aerial Spotting- The ideal angle for jackknifing an apparatus is ___ degrees from the in-line position, away from the direction of ladder extension.
60°
AOTM Aerial Spotting- Even at a 30° jackknife, the stability of the aerial is how many times greater than just the in-line position?
Twice
AOTM Aerial Ops- When set correctly, the offside ground jack may leave the ground ___ inch(es) or more but resets itself when the aerial is brought back in line with the trailer
1” or more
AOTM Aerial Ops- When spotting the aerial to windows and fire escapes balconies, raise the ladder ___ ft above the sill or railing
1 foot
AOTM Ladderpipe Ops- The hose line on the aerial are loaded when the angle of inclination is ____ degrees.
50°
AOTM Ladderpipe Ops- Do not direct the Ladderpipe nozzle/hose line past ____ degrees from in-line. If needed, the aerial can be rotated to the needed direction.
15°
AOTM:
the best climbing angles on the aerial ladder are from ___ to ___ degrees inclination from horizontal
70 to 80
AOTM:
Spotting close to the curb in the downtown area offers the AO the ability to operate between the ___ and ___ floors and maintain a climbing angle between ___ and ___ degrees inclination
- 5th and 8th floors
* 70 to 80°
AOTM:
Spotting close to the curb in the downtown area and operating the aerial below the ___ floor results in climbing angles of less than 70°
5th
AOTM:
In the downtown area, where a spot is made outside the line of parked cars, any operation below the 7th floor will be conducted at a climbing angle of less than ____ degrees inclination
70°
AOTM:
It is best to have the aerial ladder hoisted to at least a ___ degree angle before operating the other controls.
45°
AOTM:
How can an aerial ladder be used to break windows?
Extending the aerial through the window, not dropping/lowering down (will cause aerial damage if it strikes the sill)
LAFD apparatus should be considered as over-speeding at anytime the engine rpm’s exceed ___% of the peak engine speed.
90%
Descending grades:
To prevent excessive road and engine speed, select a transmission gear which will keep the engine speed in the lower ____ of the operating range when the brakes are constantly applied with light to moderate pressure.
2/3rds
AOTM:
After a hard run or a long climb, the temperature of a turbocharger will rise as much as ____ degrees F. over normal operating temperature of 900°F to 1100°F.
100°F
What are the four functions of engine oil?
- To prevent metal to metal contact in moving parts
- Assist in carrying heat away from the system
- Clean engine parts
- Form a seal between the piston rings and cylinder walls to prevent blow-by of combustion gases
AOTM:
Under normal conditions, when ground jacks are in place on concrete streets or blacktop, they _____ (do or do not?) provide ground for an electrically charged apparatus.
Do not
An exception to this rule is when the jacks are resting on a rail, puddle of water, or other similar situation
AOTM:
Under what five general conditions should a ladder pipe be used?
- Attack fires in upper levels of multi-story buildings
- Improvised standpipe
- Roof areas, that would not otherwise be accessible
- Large open areas
- To protect exposures
AOTM- The cycle of the gasoline engine is often referred to as having constant VOLUME combustion while the diesel cycle is said to have constant _______ combustion.
Pressure
