ELDT ELDT - Entry Level Driver Training Shifting and Vehicle Control Questions and Answers 1

Question 1

When should a driver downshift a manual transmission CMV?

Accepted Answer

Before entering a curve or hill

Answer

Drivers should downshift before entering curves or descending hills to maintain control and engine braking power.

Question 2

What is double clutching and why is it used in heavy trucks?

Accepted Answer

Releasing and re-engaging the clutch while moving through neutral to synchronize gear speeds

Answer

Double clutching allows the driver to match transmission and engine speeds when shifting, reducing gear wear in non-synchromesh transmissions.

Question 3

What happens if a driver tries to downshift at too high a speed in a manual transmission truck?

Accepted Answer

The engine will over-rev and transmission damage can occur

Answer

Forcing a downshift at excessive speed causes the engine to over-rev when the gear engages, potentially damaging the transmission or drivetrain.

Question 4

What does the term 'stall speed' mean in the context of automatic transmissions in CMVs?

Accepted Answer

The speed at which the torque converter stops transferring power efficiently

Answer

Stall speed is the RPM point at which the torque converter can no longer efficiently transfer engine power to the drivetrain under load.

Question 5

Why is it important to use the proper gear when starting on an uphill grade?

Accepted Answer

To avoid rolling back and maintain enough power to move forward

Answer

Starting in too high a gear on a hill may stall the engine, while the correct low gear provides sufficient torque to move the loaded vehicle forward.

Entry Level Driver Training (ELDT) Practice Test