*Bk 6- AOTM

Question 1

AOTM- _____ occurs when an engine is operating below recommended operating range

Answer 1

Lugging

Question 2

AOTM- The engine lubrication system generally used in fire apparatus is the _______ lubrication system.

Answer 2

Full Force-feed lubrication system

Question 3

AOTM- The purpose of _______ is to transmit power of the engine to the wheels.

Answer 3

Power train

Question 4

AOTM- A ________ is a flexible coupling between two shafts that permits one shaft to drive another at an angle to it

Answer 4

Universal joint

Question 5

AOTM- The ______ provides the necessary telescopic action for a driveshaft

Answer 5

Slip joint

Question 6

AOTM- The __________ permits a difference of rotational speed of the axles

Answer 6

Differential

Question 7

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.

Answer 7

Final drive

Question 8

AOTM- A _____ axel is one that supports part of the weight of a vehicle and also drives the wheels connected to it.

Answer 8

live axle

Question 9

AOTM- A ______ axel is one that carries part of the weight of a vehicle but does not drive the wheels.

Answer 9

Dead axel

Question 10

AOTM air brakes- The air compressor operates continuously while the engine is running, but the actual compression of air is controlled by the _____.

Answer 10

Governor

Question 11

AOTM Spotting Aerials- In the downtown area the curbs are approximately _____ feet from the building line.

Answer 11

11 ft

Question 12

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

Answer 12

Down slope

Question 13

AOTM Aerial Spotting- The ideal angle for jackknifing an apparatus is ___ degrees from the in-line position, away from the direction of ladder extension.

Answer 13

60°

Question 14

AOTM Aerial Spotting- Even at a 30° jackknife, the stability of the aerial is how many times greater than just the in-line position?

Answer 14

Twice

Question 15

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

Answer 15

1” or more

Question 16

AOTM Aerial Ops- When spotting the aerial to windows and fire escapes balconies, raise the ladder ___ ft above the sill or railing

Answer 16

1 foot

Question 17

AOTM Ladderpipe Ops- The hose line on the aerial are loaded when the angle of inclination is ____ degrees.

Answer 17

50°

Question 18

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.

Answer 18

15°

Question 19

AOTM:

the best climbing angles on the aerial ladder are from ___ to ___ degrees inclination from horizontal

Answer 19

70 to 80

Question 20

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

Answer 20

• 5th and 8th floors

* 70 to 80°

Question 21

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°

Answer 21

5th

Question 22

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

Answer 22

70°

Question 23

AOTM:

It is best to have the aerial ladder hoisted to at least a ___ degree angle before operating the other controls.

Answer 23

45°

Question 24

AOTM:

How can an aerial ladder be used to break windows?

Answer 24

Extending the aerial through the window, not dropping/lowering down (will cause aerial damage if it strikes the sill)

Question 25

LAFD apparatus should be considered as over-speeding at anytime the engine rpm’s exceed ___% of the peak engine speed.

Answer 25

90%

Question 26

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.

Answer 26

2/3rds

Question 27

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.

Answer 27

100°F

Question 28

What are the four functions of engine oil?

Answer 28

1. To prevent metal to metal contact in moving parts
2. Assist in carrying heat away from the system
3. Clean engine parts
4. Form a seal between the piston rings and cylinder walls to prevent blow-by of combustion gases

Question 29

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.

Answer 29

Do not

An exception to this rule is when the jacks are resting on a rail, puddle of water, or other similar situation

Question 30

AOTM:

Under what five general conditions should a ladder pipe be used?

Answer 30

1. Attack fires in upper levels of multi-story buildings
2. Improvised standpipe
3. Roof areas, that would not otherwise be accessible
4. Large open areas
5. To protect exposures

Question 31

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.

Answer 31

Pressure