Which factor should determine gear selection when climbing a steep grade?

Which factor should determine gear selection when climbing a steep grade?

• A. The length of the grade
• B. The weather
• C. The weight of the load on the vehicle
• D. All of the above

Answer: (C)

When climbing a steep grade, the weight of the load on the vehicle is the key factor in choosing a gear. A heavier load requires more engine torque to overcome gravity, so you need to stay in a lower gear that keeps the engine in its usable power range, helping prevent stalling and overheating while you maintain control and a safe speed. A lighter load can be pulled in a higher gear, which saves fuel and reduces engine wear. The length of the grade and weather can influence planning and driving adjustments (how long you’ll stay in that gear or how you adjust speed for traction), but they don’t determine the gear choice as the primary factor—the weight of what you’re carrying does.

When climbing a steep grade, the weight of the load on the vehicle is the key factor in choosing a gear. A heavier load requires more engine torque to overcome gravity, so you need to stay in a lower gear that keeps the engine in its usable power range, helping prevent stalling and overheating while you maintain control and a safe speed. A lighter load can be pulled in a higher gear, which saves fuel and reduces engine wear. The length of the grade and weather can influence planning and driving adjustments (how long you’ll stay in that gear or how you adjust speed for traction), but they don’t determine the gear choice as the primary factor—the weight of what you’re carrying does.