Which of the following is not a type of retarder?
Answers
Exhaust
Engine
Air
Electric
The Correct Answer and Explanation is :
The correct answer is Air.
Retarders are mechanisms used to slow down a vehicle, especially large trucks or buses, without relying solely on the traditional braking system. The purpose of retarders is to enhance safety and reduce the wear and tear on the brake system, which can be crucial when driving downhill or in conditions that demand constant deceleration.
Here’s an explanation of each type of retarder:
- Exhaust Retarder: This type of retarder uses the engine’s exhaust system to help slow the vehicle down. It works by restricting the flow of exhaust gases, which creates resistance in the engine. The increased back pressure helps reduce the speed of the vehicle. Exhaust retarders are commonly used in heavy-duty trucks and buses.
- Engine Retarder: Engine retarders, or engine brakes, work by using the engine’s compression and valve system to create resistance. When the driver engages the engine brake, the intake and exhaust valves are manipulated to prevent the engine from generating power, creating a braking force through the engine’s compression resistance. This system can be very effective in slowing down a vehicle, particularly on downhill grades.
- Electric Retarder: Electric retarders use electromagnetic forces to generate resistance and slow the vehicle. These systems are often used in electric and hybrid vehicles. They are efficient and can be activated by the driver to assist with deceleration, especially in city driving conditions where frequent braking is required.
- Air Retarder: Unlike the other types, an air retarder is not a recognized standard braking or deceleration system. While air is integral to braking systems (such as in air brakes), it does not function as a retarder on its own. Retarders typically rely on mechanical, electromagnetic, or exhaust-based systems to create resistance.
In summary, “Air” is not a type of retarder, while exhaust, engine, and electric retarders are common systems used to slow down a vehicle efficiently without relying on the traditional brakes.