Final answer:
The answer to the type of brake system used in trucks other than friction brakes is D. All of the above; which includes exhaust brakes, Jake brakes, and regenerative braking.
Step-by-step explanation:
The type of brake system used in trucks that is not a friction brake is:
Exhaust brake
Jake brake
Regenerative braking (typically found in hybrid and electric vehicles)
Thus, the answer is D. All of the above, when considering different brake system technologies utilized in trucks.
The exhaust brake and Jake brake are both forms of engine braking used particularly in diesel engines to slow down the vehicle without relying solely on the main friction brake system. Engine braking works by restricting the exhaust flow and creating back pressure, or in the case of a Jake brake, by releasing compressed air trapped in the cylinder. Whereas, regenerative braking is a technology found in hybrid and electric cars where mechanical energy is converted into electrical energy and stored in the battery during braking.