A - Air Brake System Fundamentals Flashcards
Friction:
Refers to the resistance between two moving bodies.
In order to stop a moving vehicle, the braking system must convert moving vehicle energy into:
Heat energy.
A vehicle requires 200 hp (149 kW) to accelerate from 0 to 100 km/h in 60 seconds, the braking system must develop:
2000 hp (1.49 MW).
If the weight of a vehicle is doubled, the power required to stop the vehicle will:
Be doubled.
If the speed of a moving vehicle is doubled, the power required to stop the vehicle will:
Be increased four times.
If both speed and weight of a moving vehicle are doubled, the power required to stop the vehicle will:
Be increased eight times.
One advantage that air brake systems have is that:
The system does not have to be bled when connecting or disconnecting trailers like hydraulic braking systems do.
One disadvantage air brake systems have is that:
There is always some brake lag.
When a given volume of air is compressed to 1/2 its original volume, its pressure will:
Double.
When a given volume of air is compressed to 1/2 its original volume, theoretically its temperature will:
Double
A driver makes a 40 psi (275.88 kPa) air brake application. If the vehicle is equipped with brake chambers that are 30 in squared (0.019 m squared) in area, each brake chamber will generate:
1200 lb (5.34 kN) of force.
If the brake chamber in question #11 was acting on a 6 in (0.152 m) slack adjuster, the brake shaft would feel:
7200 in-lb (813.60 N . m) of torque.
The term Lag Time refers to the time required:
For the air system to apply the brakes.
The component of the basic air brake system that connects the air system to the foundation brakes is the:
Brake chamber.
The component of the basic air brake system that allows the operator to regulate brake application pressure is the:
Brake valve.
