What action should be taken before downshifting when approaching a steep hill?

Study for the Mississippi CDL Test. Prepare with flashcards and multiple-choice questions, each question featuring hints and explanations. Get ready for your Mississippi CDL exam!

Before downshifting when approaching a steep hill, it is important to increase RPMs before the shift. This action ensures that the engine is operating at an optimal speed when you downshift, allowing for smoother power transition and maintaining control of the vehicle. By doing this, the driver can prevent the engine from stalling and can utilize the engine's braking power effectively, which is crucial when navigating steep inclines.

Gaining RPMs beforehand helps provide sufficient torque that will support the vehicle's weight during the climb. This also aids in ensuring that the transmission engages more smoothly, minimizing wear and tear on the vehicle's components.

The other actions do not provide the same level of preparedness for the challenges presented by a steep hill. Accelerating to gain speed is not recommended as it could lead to over-revving or loss of control. Decelerating smoothly may be useful in some situations, but it does not prepare the driver for a controlled downshift. Shifting into neutral can be dangerous, as it removes engine power and braking capability, making the vehicle harder to control on an incline.

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