11 Questions
What is the primary purpose of identifying the major vehicle systems and their component parts?
To make educated decisions about the vehicle you are driving
What is classified as a Class 2 leakage?
Leakage great enough to form drops; drops do not drip
What is the purpose of an operational test?
To observe the actual operation of a component on a fire apparatus
Which of the following is NOT one of the five primary vehicle systems that impact your ability to safely control the apparatus?
Electrical System
What is the benefit of being able to identify defects and write accurate defect reports?
To communicate with mechanics when describing conditions
What is classified as a Class 3 leakage?
Leakage great enough for drops to drip
Why is it important to know the components of the vehicle systems?
To communicate with mechanics when describing conditions
What is the purpose of a pre-trip inspection?
To ensure the operational readiness of the vehicle
What is classified as a Class 1 leakage?
Seepage of fluid; not enough to form drops
What is the benefit of being able to differentiate between normal, monitoring, and out of service conditions?
To identify critical safety issues before they cause injury or damage
What is the fifth primary vehicle system that impacts your ability to safely control the apparatus?
Brakes
Study Notes
Vehicle Movement and Control
- Key to all vehicle movement: Steering, Braking, Accelerating, Condition, and Inflation
- Tire components: Tread, Shoulder, Inner Plies, Sidewall, and Bead
Tires - Condition
- No cuts that expose cords
- No bulges on the sidewall indicating cord separation
- Front tires are not re-grooved or recapped
- Front tires are not mismatched
Tires - Inflation
- Improper inflation increases stress on the tire
- Improper inflation reduces performance in emergency handling
- Improper inflation increases wear and resistance to rolling, creating heat
- Check for obvious flatness, leaks, and abnormal bulging
- Measure tire pressure against manufacturer's recommendations
Tires - Depth
- Insufficient tread depth increases stopping distance
- Insufficient tread depth reduces steering performance
- Insufficient tread depth fails to channel rain and snow from beneath the tread, leading to hydroplaning
- DOT minimum tread depths: 4/32 inch for steering axles and 2/32 inch for other axles
- Check tread depth in multiple areas and grooves
Tires - Depth Measurement
- Use a quarter to measure tread depth on steering axles (George Washington's head should be below the tread surface)
- Use a penny to measure tread depth on non-steering axles (Abraham Lincoln's head should be below the tread surface)
Other Considerations
- Steering tires: Check tread patterns match from side to side, and they are the same size and type
Pre-trip Inspections
- Identify major vehicle systems and their component parts
- Determine methods and requirements for pre-trip inspection of vehicle systems
- Define maintenance requirements for vehicle systems
Objectives
- Identify major vehicle systems and their component parts
- Determine methods and requirements for pre-trip inspection of vehicle systems
- Define maintenance requirements for vehicle systems
- Review MCFRS out-of-service criteria for fire department apparatus
- Review defect reporting and resources for apparatus operators
Motivation
- Correctly identify defects and write accurate defect reports
- Determine and differentiate between normal, monitoring, and out-of-service conditions
- Identify critical safety issues before they cause injury or damage
Definitions
- Leakage: Class 1 (seepage), Class 2 (leakage forming drops), Class 3 (leakage with dripping drops)
- Operational Test: A test to determine the operational readiness of a component on a fire apparatus
This quiz covers the fundamentals of vehicle movement, including braking systems, steering, and acceleration. It also touches on suspension and tire components.
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