IFSTA Aerial Chapter 4 Apparatus Inspection

Question 1

Steps to check Applied Air Loss

Answer 1

Engine Off

Parking Brake Released

Press Brake pedal to floor

After one minute, air pressure should not drop more than 3 PSI

Question 2

Air Compressor Cut-in and Cut-Out

Answer 2

After emptying the air brake reservoir and starting the engine the air compressor should “cut out” around 125 and 130 psi

Apply brake lowering pressure in the tanks by 5 to 10 psi increments until the needle on the air gauge begins to move upward. Cut in Must Occur no lower than 85 psi

Question 3

Size code of tires imprinted on the side wall

Answer 3

3 digit number: Tire width in MM

Middle Number: Comparison of height to width in percent

Next Letter: Construction type

Last Number: Size of wheel rim in inches

Question 4

Maximum safe speed rating of tires is marked usually as

Answer 4

Q=mph

Question 5

Steering wheel play

Answer 5

no more than 10 degrees

Question 6

NFPA 1911 states brakes should be throughly inspected how often and at what percent grade must the parking brake hold the vehicle

Answer 6

1 year

20% grade

Question 7

When the airbrake system is full, with the engine off, air pressure should not drop more than _______ psi per minute

Answer 7

2 psi

Question 8

With Engine Off, Pressing the brake pedal all the way down air loss should not be more than _______ per minte

Answer 8

3 psi

Question 9

at operating RPMS, At what rate should air be built up from 85-100 psi

Answer 9

Within 45 seconds

Question 10

Inspection of the turn table assembly

Answer 10

Visually Check the pinion

Turntable teeth for damages

Question 11

When Testing aerials through Non Destructive Testing how is a magnetic inspection performed

Answer 11

Performed on accessible welds and steel components

Involves magnetizing the area which will attract iron powder applied to the surface

Collections of powder on the surface, reveal areas with flaws and defects

Question 12

When Testing aerials through Non Destructive testing how are conductivity readings used

Answer 12

Aluminum ladders can be tested by registering of hardness and by taking conductivity readings

A wide divergence in these readings through out the aerial indicate a change in the integrity of the material

Question 13

Where is Ultrasound inspection used when doing Aerial testing

Answer 13

Ultrasonic inspection is performed on

-Stabilizer pins

-raising and extension cylinder mounting pins

-Aerial Hinge Pins

-mounting bolts

-rotation bearing bolts

-aerial support structure bolts

Vibrations introduced to these areas bounce back to the source and if patterns return different there are flaws in the system