Operation & Safety第 51 / 60 题
On a vehicle with air brakes, when is the proper time to release the brakes during snub braking on a downgrade?
a.When your speed has been reduced to about 5 mph below your safe speed
b.Only when the vehicle comes to a complete stop
c.As soon as you touch the brake pedal
d.When the air pressure warning comes on
解析
During snub braking, you apply the brakes to slow the vehicle and then release them when you have slowed to about 5 mph below your safe speed. This lets the brakes cool between applications. Continuous light braking, by contrast, keeps heat building and can lead to fade.
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同考点相关题目
- What is brake fade?
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- If your air brakes fail and pressure drops, what safety feature will eventually stop the vehicle?
- What should you do first if the low air pressure warning comes on while driving?