What is a key benefit of using a "jake brake"?

A key benefit of using a "jake brake," or engine brake, is that it allows for controlled deceleration. This braking method utilizes the engine's compression to slow down the vehicle, which can be particularly useful when driving downhill or when needing to reduce speed without relying solely on the regular brake system. By engaging the engine's braking capability, the driver can maintain better control over the vehicle's speed, reducing the risk of brake overheating and extending the lifespan of the brake components. This is especially important in commercial driving, where heavy loads can make maintaining safe speeds challenging.

The other choices do not align with the primary function of a jake brake. For instance, increasing fuel consumption is not a benefit of using a jake brake; in fact, it can help conserve fuel by reducing reliance on the conventional braking system. The jake brake does not directly enhance vehicle handling, as its primary purpose is to facilitate controlled deceleration rather than improve maneuverability. Lastly, while it can contribute to safety by helping to control speed, it does not improve acceleration, since its focus is on slowing down the vehicle rather than speeding it up.