CTE Transmission & Drivetrain Systems 3

Question 1

What happens to engine braking effectiveness when a driver downshifts in a manual transmission?

Accepted Answer

Engine braking increases because the engine acts as a load on the drivetrain

Answer

Downshifting increases engine braking by forcing the engine to spin faster, creating more resistance (compression braking) that slows the vehicle.

Question 2

A CVT (Continuously Variable Transmission) achieves variable gear ratios using which mechanism?

Accepted Answer

Variable-diameter pulleys connected by a drive belt or chain

Answer

CVTs use two variable-diameter pulleys connected by a belt or chain; changing the effective diameter of each pulley continuously varies the gear ratio.

Question 3

What is the purpose of the ring and pinion gear set in a rear axle differential?

Accepted Answer

To change the direction of power flow 90 degrees and provide a final drive ratio

Answer

The ring and pinion gears redirect torque 90 degrees from the driveshaft to the axle shafts and establish the final drive ratio.

Question 4

Which symptom most likely indicates a worn CV axle boot on a front-wheel-drive vehicle?

Accepted Answer

Clicking or popping noise during low-speed turns

Answer

A torn CV boot allows grease to escape and contamination to enter the joint, causing clicking or popping noises particularly during slow, tight turns.

Question 5

In a four-wheel-drive system, what is the role of the transfer case?

Accepted Answer

Split and distribute torque between the front and rear axles

Answer

The transfer case receives power from the transmission and splits it between the front and rear driveshafts, enabling four-wheel-drive operation.

(CTE) Certified Teacher Career and Technical Education Practice Test

(CTE) Certified Teacher Career and Technical Education Practice Test

CTE Transmission & Drivetrain Systems 3