Deck 6: Drive Shafts and Universal Joints Servicing Drive Shafts and Universal Joints

Question 1

Common causes of driveline vibration are bad CV joints.

Answer 1

False

Question 2

The drive shaft has a natural vibration frequency.

Answer 2

True

Question 3

The typical front-engine, front-wheel drive system has _____ joint(s).

A) one universal
B) two universal
C) three universal
D) CV joints instead of Universal

Answer 3

D

Question 4

Most drive shafts in a front-engine, rear-wheel drive car have at least _____.

A) one universal joint
B) two universal joints
C) three universal joints
D) two slip joints

Question 5

A double Cardan Universal joint is comprised of three Cardan joints joined together by a yoke.

Question 6

A drive shaft rotates at six to eight times the speed of the car's tires.

Question 7

The basic purpose of the universal joint is to allow the _____.

A) drive shaft length to change
B) drive shaft to be supported at the middle
C) drive angle between two parts of the drive train to change
D) drive shaft to be removed and installed easily

Question 8

Technician A says that balance pads should be checked when checking U-joints because they are sometimes missing. Technician B says that this is not necessary because the balance pads are firmly adhered. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 9

In normal automotive terms, suspension spring compression is called jounce, while the expansion of the suspension spring is called _____.

A) bounce
B) rebound
C) slippage
D) rotation

Question 10

The short drive shafts or axles used on front-wheel drive (FWD), four-wheel drive (4WD), and rear-wheel drive (RWD) with independent rear suspension are called _____.

A) half shafts
B) two-piece shafts
C) split shafts
D) short shafts

Question 11

Four-wheel drive vehicles use two drive shafts, one to drive the front wheels and the other to drive the rear wheels.

Question 12

_____ is a synthetic oil with magnetic particles, such as iron, suspended in it.

A) Hydraulic fluid
B) Transmission fluid
C) 10W-50 motor oil
D) MR fluid

Question 13

Drive shafts have a slip joint at one end of the drive shaft which permits the effective length of the drive shaft to change.

Question 14

The drive shaft is normally made of seamless steel or aluminum tubing with universal joint yokes at each end.

Question 15

Technician A says most drive shafts have a slip yoke and three universal joints. Technician B says a drive shaft may vibrate if the balance pads are missing off of the tube. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 16

A two-piece drive shaft is also referred to as a split drive shaft.

Question 17

A drive shaft must smoothly transfer torque while rotating, changing length, and moving up and down.

Question 18

The _____ is an assembly of one or two Universal joints connected to a shaft or tube used to transmit power from the transmission to the differential.

A) drive shaft
B) driveline
C) crankshaft
D) slip yoke

Question 19

What term describes the rotational speed at which an object begins to vibrate as it turns?

A) rotation
B) vibration
C) critical speed
D) vibrational speed

Question 20

The most common drive shaft arrangement is called the torque tube design.

Question 21

What is another name for the Hotchkiss drive shaft system?

Question 22

What are the three common designs of Universal joints?

Question 23

Technician A says the mechanic's style U- joint bearing cups are held in place by metal lock rings. Technician B says some U- joints are held in place by injected nylon locks. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 24

What is the relationship between the operating angle and the installation angle?

Question 25

What determines the amount of speed changes in the Universal joint?

Question 26

What two facts must be considered when designing a drive shaft?

Question 27

What is one disadvantage to carbon fiber drive shafts?

Question 28

What is a Universal joint and how does it operate?

Question 29

What are the three types of drive shafts?

Question 30

What is magnetorheological (MR) fluid and what is its purpose?

Question 31

What is the difference between a single Cardan Universal joint and a double Cardan universal joint?

Question 32

Name the parts indicated by arrows in this figure.

Question 33

A _____ consists of two individual U-joints connected by a centering socket yoke and a center yoke that functions like a ball and socket.

A) single Cardan Universal joint
B) double Cardan Universal joint
C) CV joint
D) drive shaft

Question 34

_____ occur when opposing operating angles of two Universal joints cancel the oscillations developed by the individual Universal joint.

A) Right angles
B) Installation angles
C) Oscillating angles
D) Canceling angles

Question 35

What is another name for the Cardan Universal joint?

Question 36

Because the drive shaft rotates at high speeds and at varying angles, what is required to reduce vibration?

Question 37

Technician A says the Universal joint has a center cross with machined arms. Technician B says it has bearing cups that contain a set of ball bearings. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 38

The Spicer style, mechanic's style (aka Detroit/Saginaw style), and the Cleveland style are  styles of _____.

A) single Universal joints
B) double Universal joints
C) CV joints
D) drive shafts

Question 39

What term refers to the driven yoke and the driving yoke in the same plane?

Question 40

List three techniques used by manufacturers to balance the drive shaft and reduce the effects of vibrations and the resulting noises.