Deck 123: Drive Axle Shafts and Cv Joints

Question 1

The name most often used to describe the universal joints on a conventional rear-wheel drive vehicle drive shaft is ________.

A)CV
B)Trunnion
C)Spider
D)Cardan

Answer 1

Cardan

Question 2

A rear-wheel drive vehicle shudders or vibrates when first accelerating from a stop. The vibration is less noticeable at higher speeds. The most likely cause is ________.

A)Excessive U-joint working angles
B)Unequal U-joint working angles
C)Drive shaft imbalance
D)Brinelling of the U-joint

Answer 2

Excessive U-joint working angles

Question 3

All drive shafts are balanced.

Answer 3

True

Question 4

The maximum allowable difference between the front and rear working angle of a drive shaft is ________.

A)3 deg
B)1/2 deg
C)1 deg
D)1/4 deg

Question 5

Which series U-joint has the greatest torque capacity?

A)1350
B)1260
C)1310
D)1480

Question 6

Two technicians are discussing torque steer on a front wheel-drive vehicle. Technician A says that equal length drive axle shafts help reduce torque steer. Technician B says that equal drive axle shaft angles help reduce torque steer. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 7

The outer CV joints used on front-wheel drive vehicles are ________.

A)Plunge type
B)Fixed type

Question 8

The proper grease to use with CV joints is ________.

A)Red moly grease
B)Dark blue EP grease
C)The grease that is supplied with the boot kit
D)Black chassis grease

Question 9

Drive axle shafts are also called ________.

A)Propeller shafts
B)Double-Cardan shafts
C)Half shafts
D)Driveshafts

Question 10

Two technicians are discussing a dented driveshaft. Technician A says that it should be repaired. Technician B says it should be replaced. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 11

A dent in a prop shaft can cause damage that may result in failure when engine torque is applied.

Question 12

Technician A says only 4WD rear driveshafts are balanced. Technician B says all RWD driveshafts are balanced. Which technician is correct?

A)Technician B only
B)Neither technician A nor B
C)Both technicians A and B
D)Technician A only

Question 13

Technician A says that front and rear U-joints on a RWD axle should operate at different angles to prevent vibration. Technician B says that front and rear U-joints on a RWD axle should operate at equal angles to prevent vibration. Which technician is correct?

A)Neither technician A nor B
B)Both technicians A and B
C)Technician B only
D)Technician A only

Question 14

Which of the following is an acceptable working angle for a RWD driveshaft?

A)6 degrees
B)1 degree
C)0 degrees
D)None of these are correct.

Question 15

Double Cardan joints can function at a maximum angle of ________.

A)0 degrees
B)2 degrees
C)10 degrees
D)None of these are correct

Question 16

The Rzeppa type joint is the most commonly used outer joint on FWD vehicles.

Question 17

Technician A says that some FWD vehicles use unequal length front drive shafts called half shafts. Technician B says that unequal length drive shafts may cause a pull during hard acceleration called torque steer. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 18

Which of the following is NOT used as CV joint boot material?

A)Silicone rubber
B)Natural rubber
C)Hard thermoplastic
D)All of these are used as boot materials

Question 19

Technician A says that engine torque is transmitted through the surface of the hollow driveshaft from the transmission to the rear differential in a RWD vehicle. Technician B says that a bent driveshaft on a RWD vehicle can cause a condition known as torque steer. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 20

Which driveshaft can be longer without the need for a center support bearing?

A)Aluminum
B)Steel

Question 21

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 22

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

A)Vehicle year
B)Vehicle make
C)Center to center distance between U-joints
D)Vehicle model

Question 23

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 24

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 25

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

A)At highway speeds
B)When accelerating from a stop
C)Both A and B
D)Neither A nor B

Question 26

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

A)Tripod
B)Rzeppa
C)Cardan
D)None of these

Question 27

Inner CV joints must ________.

A)Allow the wheels to travel up and down over bumps
B)Become shorter or longer as the suspension moves
C)Both A and B
D)Neither A nor B

Question 28

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

A)Plunge joint
B)U-joint
C)Ball joint
D)Rzeppa joint

Question 29

What type of plunging joint is pictured here?

A)Tripod
B)Cross-grove
C)Double offset ball
D)None of these

Question 30

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