IFSTA 18 Stabilizing Aerials

Question 1

As long as a gravity circle is not outside the base of stability, apparatus should

Answer 1

Remain stable

Question 2

If the apparatus parks on a lateral grade, the center of gravity will be shifted to which side

Answer 2

lower side

Question 3

Name three types of stabilizers

Answer 3

post (down riggers)
box (H type)
A frame (scissor or x style)

Question 4

What three steps must the driver operator make to conduct preliminary checks when applying stabilizers

Answer 4

Insure front brake lock is on
ensure PTO is engaged light lit
chalk wheels

Question 5

Dimensions of stabilizer pads are usually what

Answer 5

24” x 24”

Question 6

On level ground the driver operator should lower which stabilizers first

Answer 6

The driver operator will lower stabilizers on one side of the vehicle than the other

Question 7

Define laterally in terms of stability

Answer 7

Side to side

driver/passenger

Question 8

When operating on uneven terrain which stabilizers should be lowered first

Answer 8

stabilizers on the uphill side of the vehicle first until solid contact is made with the ground

Then the stabilizers on the downhill side of the vehicle will be lowered until truck is level

Question 9

 A correction of lateral unevenness is possible on grades up to what percent

Answer 9

5%

Question 10

With regard to hydraulic fluid the interlock prevents what

Answer 10

The flow of hydraulic fluid into or out of the stabilization system while an aerial device isn’t used

Question 11

With regard to hydraulic fluid the holding valve prevents what

Answer 11

Movement of hydraulic fluid within the stabilization system