In order to properly drive on a downgrade slope you must execute four steps. These are the first 3 steps. Downshift before entering the grade, make sure the MWS apparatus remains in gear, use brakes and lower gears, identify the step that is missing from the list above.

• A. Increase throttle to maintain speed
• B. Apply emergency brake
• C. Limit the engine rpm - below redline
• D. Disable transmission

Answer: (C)

Descending a grade safely relies on using engine braking in combination with the vehicle’s brakes, while staying in gear. Downshifting before you enter the slope loads the engine so it can help slow the vehicle as gravity pulls you downward. Keeping the MWS apparatus in gear preserves drivetrain control and ensures engine braking remains available. Using brakes and lower gears together manages speed more smoothly and reduces the risk of brake overheating. The step that completes the sequence is to limit the engine RPM, keeping it below the redline. This protects the engine from over-revving as you descend and downshift, allowing the engine to continue contributing to braking without damage. Increasing throttle would speed you up; the emergency brake is unsafe for controlled descent; disabling the transmission isn’t applicable.