Duo-servo and Leading-trailing
drum brake and disc brakes
No. Hydraulic brakes can be either drum or disc brakes, and these two brake types are available as air brakes and air-over-hydraulic systems, as well.
Disc brakes and drum brakes.
A wheel cylinder describes "Drum Brakes" - Drum brakes have one cylinder with two diametrically opposed pistons.
Disc brakes are not subject to "fade" which occurs when drum brakes overheat and lose the ability to stop, another advantage of disc brakes is that they tend to stop in a straight line unlike drum brakes which often "pull" to one side. Yet another advantage of disc brakes is that they self adjust by drawing brake fluid in behind the piston while it is common for the self adjusters in drum brakes to seize due to corrosion then the drum brakes quit adjusting then the brake pedal goes lower and lower.
Duo-servo type drum brakes are an improved version of twin leading construction, where two brake shoes are linked. When a primary side leading shoe is pressed against the drum by the wheel cylinder, the force that makes it rotate together with the drum wedges the secondary side leading shoe into the drum to achieve braking action. This type of drum brake provides strong braking for both forward and reverse movement. It is used in commercial vehicles that require especially large braking forces.
Rear brakes come in two types: disc or drum. See "Related Questions" below for more specific details for both types...
The controller and mechanical brakes.
The controller and mechanical brakes.
The controller and mechanical brakes.
Drum & Disc are the two types of braking systems on a car.
The two primary types of mutual funds are "no-load" and "load" funds