310T Drive Train Systems 3

Question 1

During a road test a technician notices a clunking noise when transitioning from acceleration to deceleration. The MOST likely cause is:

Accepted Answer

Excessive driveshaft end play or worn U-joints

Answer

A clunk during torque reversal (power-on to power-off) is a classic symptom of excessive U-joint play or worn slip-yoke splines.

Question 2

When adjusting a manual slack adjuster on a drive axle, the technician should ensure the pushrod stroke at full application does NOT exceed:

Accepted Answer

1.75 inches (44 mm) for a standard 30-type chamber

Answer

Federal regulations specify maximum pushrod stroke limits by chamber type; a type-30 chamber has a 1.75-inch limit before the brakes are considered out of adjustment.

Question 3

A fully automatic transmission in a transit coach does NOT upshift at the correct vehicle speed. After verifying the throttle position signal is correct, the technician should NEXT check:

Accepted Answer

Turbine speed sensor and output shaft speed sensor signals

Answer

The transmission control module uses turbine and output speed sensor signals to calculate the correct shift points.

Question 4

What is the function of the torque converter stator?

Accepted Answer

Redirect fluid from the turbine back to the impeller to multiply torque

Answer

The stator redirects returning fluid from the turbine to assist the impeller, which multiplies torque during low-speed acceleration.

Question 5

A technician is replacing a pinion seal on a drive axle. Before installing the new seal, it is MOST important to:

Accepted Answer

Check and record pinion bearing preload before disassembly

Answer

Pinion bearing preload must be recorded before disassembly so it can be restored to the original specification during reassembly.

(310t) Truck and Coach Technician Certification Practice Test

(310t) Truck and Coach Technician Certification Practice Test

310T Drive Train Systems 3