Yes, there are light duty and medium duty garbage trucks.
air wedge- acutuated
Yes a bobtail has air brakes.
If they have foundation (drum) brakes, yes. If they have discs, no.
Their trucks with a Gross Vehicle Weight Rating in excess of 26,000 lbs. do.
Only in an emergency.
In all cars and most trucks HYDRAULIC pressure is used to apply the brakes. In an air brake system such as is found on medium and heavy duty trucks the air is actually released to apply the brakes.
You would only do it in an emergency.
Visit the following link to learn more about the difference between air brakes and regular car brakes: http://auto.howstuffworks.com/auto-parts/brakes/brake-types/air-brake.htm. In short, air brakes are made to prevent trucks, trains and buses from crashing.
You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.
You have hydraulic brakes and air brakes. Hydraulic brakes can be drum or disc. Air brakes can be drum, disc, or wedge. On a lot of medium duty trucks and RVs, the parking brake can be a shaft brake, mounted to the back of the transmission.
Semi trucks often use compression brakes. When activated compression brakes open valves in the engine, slowing down the engine and bringing the truck to a stop. Non-semi trucks use disc brakes to stop. A common type of brake system used in big trucks is the air operated "S" cam.
People use it for their plumbing, the air brakes on trucks, hydraulics, etc.