CDL · Air brakes
How do you set the parking brake on a newer vehicle equipped with air brakes?
Correct answer: By using a yellow push-pull knob shaped like a diamond.
Answer options
- ABy using a yellow push-pull knob shaped like a diamond Correct
- BBy using a yellow knob shaped like the letter P
- CBy moving the gear selector to the Park position
Why
On newer air-brake vehicles, you set the spring parking brakes by pulling out a yellow, diamond-shaped knob and release them by pushing it back in. Some older vehicles use a lever for the same job.
About this question
Topic: Air brakes License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Checking and Using Air Brakes (15 questions). Take the full set and check your score.
Practice Checking and Using Air BrakesMore questions from Checking and Using Air Brakes
- Why do air brakes take longer to work than hydraulic brakes?
- In a vehicle equipped with air brakes, how do you make a normal stop?
- Under ideal conditions, how much total distance does a vehicle with air brakes need to stop from 55 mph?
- A combination vehicle's air system has been built up to governor cut-out. With the engine shut off and the brake pedal fully applied, the air pressure should drop by less than:
- What is the name for the sum of the perception, reaction, brake lag, and braking distances?
- Your truck's air tanks do not drain automatically. How often should you drain them yourself?
- With the engine shut off and the brakes released, a combination vehicle's air pressure should drop by less than:
- Some trucks have dual parking control valves that can use air stored in a separate tank. What is that stored air used for?
Practice on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.