Question 1

Technician A says that carbon fiber driveshafts need support bearings every 24 inches. Technician B says that carbon fiber and aluminum driveshafts reduce rotating mass and are more efficient than steel driveshafts. Which technician is correct?

Accepted Answer

Technician B is correct because carbon fiber and aluminum driveshafts do indeed reduce rotating mass compared to steel driveshafts, making them more efficient. Technician A's statement about needing support bearings every 24 inches is not a standard requirement for carbon fiber driveshafts; their design and support needs can vary based on the application and manufacturer specifications.

Question 2

Which of the following should you know to get a correct replacement driveshaft?

Accepted Answer

The center to center distance between U-joints is the most important measurement to get a correct replacement driveshaft.

Question 3

Technician A says that the engine drives the U-joint at a constant speed, but the output speed of the U-joint changes based on the angle. Technician B says that smaller U-joint angles create greater changes in speed. Which technician is correct?

Accepted Answer

Technician A is correct because the output speed of a U-joint varies with the angle due to the non-linear motion created by the joint's design, while Technician B is incorrect because larger U-joint angles, not smaller, create greater changes in speed.

Question 4

Technician A says that two U-joints are used on a driveshaft to prevent vibration. Technician B says that the more equal the U-joint angles, the less chance of driveshaft vibration. Which technician is correct?

Accepted Answer

Both technicians are correct. Technician A is correct because using two U-joints in a driveshaft helps to cancel out angular velocity variations, reducing vibration. Technician B is correct because having equal U-joint angles at each end of the driveshaft helps ensure smooth rotation and minimizes vibration.

Question 5

Small differences in driveshaft U-joint angles cause vibration ________.

Accepted Answer

The answer of Small differences in driveshaft U-joint angles cause...

Question 6

Which type of CV joint transfers energy using six balls enclosed in cages to allow movement?

Accepted Answer

Rzeppa CV joint uses six balls enclosed in cages to allow for angular movement while transferring energy, making it suitable for the constant velocity joints in front-wheel-drive vehicles.

Question 7

Inner CV joints must ________.

Accepted Answer

Inner CV (Constant Velocity) joints are designed to accommodate the up and down movement of the wheels as the vehicle goes over bumps (allowing the suspension to move), and they also adjust in length to compensate for the changes in distance between the transmission and the wheel hub.

Question 8

This type of driveshaft joint is called a(an) ________.

Accepted Answer

The answer of This type of driveshaft joint is called...

Question 9

What type of plunging joint is pictured here?

Accepted Answer

The answer of What type of plunging joint is pictured...

Question 10

A CV joint can operate at an angle of up to 40 degrees.

Accepted Answer

CV (Constant Velocity) joints are designed to allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They can typically operate at angles up to 40 degrees, though this can vary slightly depending on the specific design and application of the CV joint.

Quiz 123: Drive Axle Shafts and Cv Joints