Home › CDL Practice Tests › General Knowledge Questions › Question 375
In an automatic or automated manual transmission truck, what is manual mode most useful for?
- A.Forcing the highest gear at all times
- B.Holding or selecting a lower gear for grades and descents so the transmission does not hunt or upshift when the driver needs engine braking
- C.Disabling the brakes
- D.Racing from stops
Correct answer
B. Holding or selecting a lower gear for grades and descents so the transmission does not hunt or upshift when the driver needs engine braking
Why
Automated gearboxes optimize for economy on easy terrain, which can mean an unwanted upshift at the top of a descent. Manual control lets the driver apply the same downgrade discipline as a full manual: pick the gear before the grade and keep retarding power engaged.
Manual topic: Shifting - Automated · From the General Knowledge practice bank (GK-375).