Pump Ops Chpt 18

Question 1

When parked, the aerial device in its stowed position, the apparatus has a center of gravity located along the __________ of the chassis, between the front and rear axles.

Answer 1

Longitudal midline

Question 2

Rotating a device will trace a ______

Answer 2

Gravity circle

Question 3

Newer apparatus may be equipped with _______ that prevent the movement of the aerial device to the short jacked side

Answer 3

Limit switches (rotational interlocks)

Question 4

Excessive loading on the aerial device will result in an expansion of the ______

Answer 4

Gravity circle

Question 5

(Also called outriggers, ground jacks, and screw jacks) Are required to prevent the apparatus from tipping as the aerial device is extended away from the centerline of the chassis

Answer 5

Stabilizers

Question 6

Straight jacks that extend down from the chassis (also called down riggers)

Answer 6

Post type stabilizers

Question 7

(Also called H stabilizers) Stabilizers that extend straight away from the truck and have jacks that extend straight down to the ground

Answer 7

Box stabilizers

Question 8

(Also called fulcrum stabilizers) stabilizers that extend down and away from the chassis at an angle

Answer 8

A frame, scissor, or x style

Question 9

Pneumatic systems require anywhere from _____ air pressure for the PTO to be operated, depending on the manufacturer.

Answer 9

50 to 140 psi

Question 10

Once the driver/operator is assured that the preliminary activities are successfully completed and the ground is prepared for stabilization activities, the ______ may be operated to provide hydraulic power to the stabilizing system

Answer 10

Selector valve

Question 11

The driver operator should make certain the control is in the ______, which is also called the outrigger, jack, or leveling position

Answer 11

Stabilization position

Question 12

Allows for the maximum stability of the apparatus and for the greatest range of safe movement of the aerial device

Answer 12

Even terrain

Question 13

Are the most common stabilizers used on newer apparatus

Answer 13

Box stabilizers

Question 14

The stabilizer pads are usually provided by the manufacturer of the apparatus and are usually ______ with a built in handle

Answer 14

24x24 inch

Question 15

The primary difference is that driver/operators can only deploy ______ in the fully extended position and not at all if obstructions are present

Answer 15

Fulcrum type stabilizers

Question 16

The designs of some apparatus allow for partial extension of the stabilizer arms, sometimes called ______

Answer 16

Short jacking

Question 17

There are two ways that the truck can be uneven: laterally (side to side) or longitudinally (end to end). Of the two the easiest to correct is ________

Answer 17

Lateral unevenness

Question 18

Correction if lateral unevenness is possible on grades of up to _____ although this can vary depending on the aerial device

Answer 18

5 degrees (8.7 percent)

Question 19

A slope of 5 degrees means that there is a rise in terrain height of ___ for every 100 ft of distance

Answer 19

5 feet

Question 20

On most aerial apparatus, the combination of the interlock feature of the selector valve and the hydraulic system holding valves provide _______

Answer 20

Automatic locking capabilities

Question 21

The _____ prevents the flow of hydraulic fluid into or out of the stabilization system while the aerial device is in use

Answer 21

Interlock

Question 22

The _____ prevent the movement of fluid within the stabilization system

Answer 22

Holding valves

Question 23

The driver operator activates the holding valves by moving the selector switch to the _______

Answer 23

Aerial position

Question 24

Parking the apparatus with an ______ between the tractor and trailer sections increases the stability beyond what the stabilizers alone can provide

Answer 24

Angle

Question 25

Maximum stability is achieved when the angle of the tractor is _____ from the centerline of the trailer, and the aerial ladder is operated toward the outside of the angle.

Answer 25

60 degrees

Question 26

The driver/ operator should never position the vehicle with the tractor and trailer at an angle greater than _____ degrees as poor stability is produced and damage to the truck may occur.

Answer 26

90 degrees

Question 27

Many tractor drawn vehicles are equipped with an alarm that sounds if an attempt is made to create an angle greater than _______

Answer 27

90 degrees