Chapter 2

Question 1

What’s the final factor that will determine if the vehicle will move?

Answer 1

contact between the vehicle and the road through the tires

Question 2

How is brake heat dissipated?

Answer 2

The heat is absorbed and dissipated into the atmosphere, primarily through the rake drums/rotors

Question 3

If the weight of the vehicle is doubled, how many times must the stopping power be increased?

Answer 3

double the weight requires double the stopping power

Question 4

What causes brake fade?

Answer 4

brake fade is when they stop working properly due to overheating

Question 5

What can cause jackknifing?

Answer 5

Poor braking techniques

Question 6

What’s the difference between ABS and ATC?

Answer 6

ABS -helps prevent wheel lock up or skids caused by over braking on slippery road surfaces.

ATC -uses the same wheel sensors o sense if a wheel has lost traction and is spinning. If the wheel begins to spin the traction control system will apply the bake transferring power to the opposite side.

Question 7

What’s one of the hazards of stopping a tractor/trailer combination?

Answer 7

8 equally loaded axles and 16 brakes (more parts to potentially not work properly)

Question 8

When should a retarding device be used?

Answer 8

controlling speed on long downgrades without using the main brakes

Question 9

What’s brake lag time?

Answer 9

a car’s brakes work almost instantly when you press the brake pedal, with air brakes there’s a brake lag time of approximately 4/10 off a second until it begins to slow yo down after you press the pedal..