Question 21 of 140

You are approaching a downgrade with a fully loaded combination vehicle. What should you do before starting down?

Pick an answer

Wait until you feel the vehicle speeding up, then react
Shift to neutral so the engine doesn't work against gravity while descending the grade
Keep the same gear and speed you were using on flat ground
Reduce your speed and select a low gear before the grade gets steep

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Correct answer to question 21 (Combination Vehicles): Reduce your speed and select a low gear before the grade gets steep

Why

Slowing and downshifting before the grade steepens lets engine braking help control speed the whole way down, instead of trying to catch up once the combination has already picked up speed.

Updated: November 2026

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You are approaching a downgrade with a fully loaded combination vehicle. What should you do before starting down?

Why

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