Chapter 18

Question 1

When parked with the aerial device in its stowed position, the apparatus has a center of gravity located?

Answer 1

Somehwere along the longitudinal midline of the chassis, between the front and rear axles

Question 2

PTO switch varies from manufacturer to manufacturer and may be?

Answer 2

Pneumatic, electric,hydraulic, or a combination of these three.

Question 3

Pneumatic systems require what air pressure for the PTO to be activated?

Answer 3

50-140 psi for the PTO to activate

Question 4

What is a “hot shift” PTO system?

Answer 4

A PTO system that is acceptable to engage these systems when the main transmission is in neutral

Question 5

Why should you whenever possible position the aerial before activating the fire pump?

Answer 5

When the fire pump is activated and in use, and the hydraulic system needs to be activated later, it is necessary to lower the engine speed to near idle prior to engaging the hydraulic system PTO or other device

Question 6

The wheel chocks should be placed?

Answer 6

In front of and behind the tire, on both sides of the apparatus, with approximately an inch of extra space for the apparatus to move without causing a wheel chock to become stuck under a tire

Question 7

When should cribbing be used for stabilization of apparatus?

Answer 7

Cribbing should be used only as a last resort by those with proper instruction and training in its use

Question 8

What is the most common stabilizer type used on newer apparatus?

Answer 8

Box stabilizers

Question 9

What size are stabilizers normally?

Answer 9

24x24

Question 10

One stabilizer should never be fully activate alone because ?

Answer 10

Due to the potential for chassis and torque box damage

Question 11

When the stabilizers have made contact with the ground, the driver/operator should?

Answer 11

Alternate between the sides to raise the vehicle to its working position, as close to level as possible

Question 12

What can happen if you repetitively fully deploy one side and then the other in a two step process?

Answer 12

It can cause cumulative damage to tires/wheels, axles, suspension, torque box and chassis

Question 13

What is good for driver/operators to know about fulcrum stabilizers?

Answer 13

The driver/operator can only deploy fulcrum-type stabilizers in the fully extended position and not at all if obstructions are present

Question 14

When should stabilizers be placed with fulcrum stabilizers?

Answer 14

Fulcrum Stabilizers should be lowered to within a few inches of the ground prior to the placement of the stabilizer pads

Question 15

What is short jacking and what does it do to load and range of motion?

Answer 15

Setting the stabilizers on one side of the apparatus shorter than the stabilizers on the other side; usually done when access for full stabilization is restricted. The load and range of safe movement capabilities significantly decrease if the extension arms are not extended to their maximum positions

Question 16

Which is easier to correct, a truck laterally (side to side) or longitudinally (end to end)?

Answer 16

The easiest to correct is lateral unevenness

Question 17

Correction of lateral unevenness is possible on grades up to?

Answer 17

5 percent (approximately 3 degrees)

Question 18

Most manufacturers recommend lowering which stabilizers first?

Answer 18

On the uphill side of the vehicle first, These stabilizers should be lowered only until solid contact is made with the ground

Question 19

After the apparatus is stabilized, it is preferable to operate the aerial device on which side?

Answer 19

Over the uphill side of the apparatus

Question 20

If operating on a longitudinal grade,and the turntable is not level operating off the side of the apparatus will cause what force?

Answer 20

This lack of parallel operation will generate lateral and torsional stresses within the structure of the aerial device when it is raised and cause firefighters to be unsteady while working on it

Question 21

Place the apparatus crosswise on the grade in what situations?

Answer 21

Unless the situation is unavoidable, don’t place the apparatus crosswise on the grade

Question 22

Should driver operators place stabilizers on curbs, sidewalks, parking lots, water valve covers, or other similar obstructions.?

Answer 22

Whenever possible the driver operator should avoid doing so. These surfaces may not support the weight of the stabilizers and may collapse

Question 23

What should the driver operator monitor when the apparatus is positioned on ice or slippery surfaces?

Answer 23

The driver operator should constantly monitor the stabilizers and be prepared to lower them further for maximum contact with the ground

Question 24

What can driver/operators do to prevent the aerial device from moving or chattering along the surface due to the vibration and gravity?

Answer 24

Operators can prevent this through the use of wheel chocks. Sand or other friction enhancing products can be carried aboard the aerial to assist in a secure planting of the stabilizer

Question 25

What is the difference between the interlock and the holding valves?

Answer 25

The interlock prevents the flow of hydraulic fluid into or out of the stabilization system while the aerial is in use. The holding valves prevent the movement of fluid within the stabilization system

Question 26

What shows when the interlocks are engaged on most new apparatus?

Answer 26

Many newer apparatus are also equipped with an indicator light that shows when the interlock are engaged

Question 27

Where should the pins be inserted on a box-type stabilizer if equipped?

Answer 27

The pins should be inserted in the hole immediately below the jack housing, if equipped

Question 28

What should the driver/operator do if before retracting the stabilizers?

Answer 28

The driver/operator should also check around the entire apparatus to make sure that all personnel and equipment are clear of the apparatus before retracting the stabilizers

Question 29

The driver/operator should raise the stabilizers in what order?

Answer 29

The driver/operator should always raise the stabilizer following the reverse order by which they were deployed whether on level or uneven terrain.

Question 30

What does raising the stabilizers in reverse order do?

Answer 30

Avoids any undue stress on any component of the aerial apparatus.

Question 31

Maximum stability is achieved when the angle of the tractor is what degrees from the centerline of the trailer?

Answer 31

60 degrees