ASE T3 Drivetrain Exam Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q11When using an inclinometer to check driveline angles, what is the maximum acceptable combined operating angle for most heavy-duty applications?
✓ Correct answer: B. 7 degrees
The maximum acceptable combined operating angle for most heavy-duty applications is 7 degrees. Exceeding this angle can lead to premature U-joint failure due to excessive operating angles.
Q12What is the most likely cause of a cyclic vibration that occurs at a frequency related to driveshaft speed?
✓ Correct answer: A. Driveshaft imbalance
Driveshaft imbalance is the most likely cause of a cyclic vibration related to driveshaft speed, as the imbalance creates a centrifugal force that increases with rotational speed.
Q13Technician A says that a vibration caused by an out-of-balance driveshaft will increase with vehicle speed. Technician B says that a worn center support bearing typically causes a vibration that increases with torque load. Who is right?
✓ Correct answer: D. Both Technician A and B
Technician A is correct - vibration from an out-of-balance driveshaft increases with speed. Technician B is also correct - a worn center bearing typically causes vibrations that increase with torque load as the bearing is subjected to more stress.
Q14When installing a new universal joint, what is the proper procedure for securing the bearing caps?
✓ Correct answer: C. Press them in evenly until the retaining clips can be installed
When installing bearing caps, they should be pressed in evenly using appropriate tools until the retaining clips can be properly seated. This ensures even loading and proper retention of the bearing caps.
Q15What is the correct method for lubricating a universal joint that has grease fittings?
✓ Correct answer: B. Add grease slowly until it appears at all four bearing seals
The correct method is to add grease slowly until it appears at all four bearing seals, which ensures complete lubrication of the bearing surfaces without over-packing.
Q16During PTO driveshaft installation, what is the most important factor to check?
✓ Correct answer: A. Proper driveshaft length
The most important factor is proper driveshaft length, which ensures the PTO components have the correct operating clearances to prevent binding or separation during operation.
Q17What should be done if driveline vibration analysis software shows excessive operating angles?
✓ Correct answer: D. Shim the axle, transmission, or adjust suspension height
Shimming the axle, transmission, or adjusting suspension height can correct excessive operating angles by changing the relative positioning of driveline components.
Q18What is the correct procedure when checking slip yoke splines for wear?
✓ Correct answer: C. Measure the backlash between the mating splines
When checking for slip yoke spline wear, measuring the backlash (movement) between the mating splines provides the most accurate assessment of wear and potential for vibration.
Q19A truck has a vibration that occurs only during coastdown. What is the most likely cause?
✓ Correct answer: B. Worn slip splines
Worn slip splines are most likely to cause vibration during coastdown because the change from power to coast allows excessive movement in the worn spline connection.
Q20When replacing a center support bearing, Technician A says the bearing should be pressed onto the shaft. Technician B says the rubber insulator should be inspected for deterioration. Who is right?
✓ Correct answer: A. Both Technician A and B
Both statements are correct. The bearing should be pressed onto the shaft using proper tools to prevent damage, and the rubber insulator should be inspected for deterioration which could cause vibration or misalignment.
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Theory