Chapter 4 Flashcards
How is walk around inspection conducted?
start at driver door, inspecting components clockwise rotation
When using a garden hose, what is desired distance from end of hose to apparatus?
1 foot
Nitrogen is a useful agent because?
Holds less moisture
Diss apostates heat much faster
Better fuel mileage
Curb weight?
Weight if an empty apparatus with no equipment, water, passengers or tools
GVWR
Maximum weight a vehicle can be safely operated
What is rapping?
Hit tires with a mallet
Maximum steering wheel free play?
10 degrees
Hearing protection should be used above ____ decibels?
90
Load sequencer?
Turns various lights on at specified intervals
Load monitor
Watches electrical system for added electrical loads
Load shedding?
Load monitor will shut down less important electrical equipment when overloading occurs.
Parking brake should hold an apparatus in place on what percent grade?
20% grade
Testing air brake leakage rate, air pressures should not loose more than ____% per min
2
How fast should pressure build up in a duel air system?
45 seconds
What do you fill battery’s with if water level is low?
Distilled water
What is order to connect battery charger to battery?
Red positive then black negative then plug in charger
Apparatus tests can be grouped I to two categories?
Preservice tests and service tests
Nondestructive testing is? Performed how often?
Test method that does not alter or damage materials.
Every 5 years
Any person who is actually performing nondestructive testing must be certified as?
American Society for nondestructive testing level II NDT in the test method being performed
ASNT
How to test for welds and cracks?
Magnetic particle Inspection
How does conductivity readings work?
Aluminum ladders by registering the hardness, taking conductivity readings throughout length of ladder.
Material is saturated with a dye or fluorescent penetrant, and a developer is applied.
Liquid penetrant testing
How is ultrasonic testing done?
Sonic the hedge hog..wait wrong
Introductions of high frequency vibrations. Used on bolts, pins, extension cylinder mounting pins
How does radiographic testing work and on what?
Uses xray
On welds in aerial
Acoustic emission testing
Emitting sound waves into device and reading then at distant point.
What is acceptance testing?
Conducted to assure purchaser that apparatus meets original bid
