Deck 114: Rear Suspensions and Service

Question 1

A vehicle equipped with a coil spring front suspension and a leaf spring rear suspension "dog tracks" while driving on a straight, level road. Technician A says that a broken center bolt could be the cause. Technician B says defective rear shock absorbers could be the cause. Which technician is correct?

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

Answer 1

Technician A only

Question 2

When axle windup is controlled by the rear leaf spring during acceleration, the suspension type is called a ________.

A)Torque arm
B)Semi-trailing arm
C)Hotchkiss drive
D)Trailing arm

Answer 2

Hotchkiss drive

Question 3

A loud "bang" is heard and felt every time the accelerator is depressed or released on a rear-wheel drive vehicle. Technician A says that a leaking shock absorber could be the cause. Technician B says that a broken torque arm could be the cause. Which technician is correct?

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

Answer 3

Technician B only

Question 4

Technician A says that leaf springs are mounted lengthwise on the rear of many vehicles. Technician B says that some vehicles use transversely mounted leaf springs on the rear. 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 5

A strut-type suspension is used ________.

A)In the rear only
B)In the front only
C)In both the front and rear
D)In rare vehicles no longer in production

Question 6

Two technicians are discussing rear shock absorbers. Technician A says that if one shock is leaking, then both rear shock absorbers should be replaced. Technician B says that the rear axle should be supported before removing the rear shock absorbers. 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

A "witness mark" is a ________.

A)Mark where two parts have rubbed or touched
B)Type of identification mark
C)Type of fastener
D)Type of tool

Question 8

The left front of the vehicle is higher than the right front and the right rear is lower than the left rear. What is the most likely cause of this problem?

A)A broken left front shock absorber
B)A broken track rod
C)A weak right rear shock absorber
D)A sagging right rear spring

Question 9

One rear leaf spring is broken. Technician A says that both rear leaf springs should be replaced. Technician B Says that only the broken spring needs to 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 10

A track rod is also called a ________.

A)Handling link
B)Semi-independent rod
C)Panhard rod
D)Control rod

Question 11

Technician A says that solid rear axles are used only in rear-wheel drive vehicles. Technician B says that solid rear axles are used in both front-wheel drive and rear-wheel drive vehicles. 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 12

Technician A says that a leaf spring suspension requires control arms to brace and position the rear axle. Technician B says that leaf springs help locate the axle under the vehicle. 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 13

Technician A says that trailing arms include any arm where the supported member trails the arm. Technician B says that trailing arms may also be called control arms on some vehicles. 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 14

Technician A says that a torque arm is designed to support the weight of the vehicle. Technician B says that a torque arm is designed to prevent rear axle wind up. 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 15

Technician A says that many unit body suspensions use struts on the rear. Technician B says that most full frame vehicles use struts on the rear. 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 16

Technician A says that SLA suspensions reduce tire scrub. Technician B says that solid rear axles are used with independent rear suspensions. 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 17

Technician A says that suspension diagnosis and service should begin with a comprehensive test drive.Technician B says that shocks or struts should be replaced in axle pairs. 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

Technician A says that all unit body vehicles have a track rod or stabilizer bar in the rear suspension. Technician B says that individual leaves of a leaf spring often crack before breaking. 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 19

Which of the following is a disadvantage of a solid rear axle?

A)Reduced tire adhesion
B)Increased proportion of unsprung weight
C)Side to side shock transference
D)All of these are disadvantages of a solid rear axle

Question 20

Which of the following reduce tire adhesion (traction)?

A)Shimmy
B)Unsprung weight
C)Wheel tramp
D)All of these reduce tire adhesion

Question 21

Technician A says that as axle shafts rotate in one direction to drive the wheels, the axle housing attempts to rotate in the opposite direction. Technician B says this is 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 22

Axle windup is most often a problem with ________.

A)Front-wheel drive vehicles
B)Vehicles with a live rear axle
C)Both A and B
D)Neither A nor B

Question 23

Technician A says that trailing arms run perpendicular to the center line of the chassis. Technician B says that trailing arms run parallel to the center line of the chassis. 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 a torque arm runs perpendicular the the driveshaft. Technician B says that a torque arm runs parallel to the driveshaft. 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

Panhard rods are installed ________.

A)To support the weight of the vehicle
B)Parallel to the rear axle
C)Parallel to the centerline of the chassis
D)None of these

Question 26

Technician A says that vehicles with independent rear suspensions provide better handling than those with solid rear axles. Technician B says that vehicles with independent rear suspensions generally have less unsprung weight. 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 27

Technician A says that a semi-independent rear suspension is used with live rear axles. Technician B says that the semi-independent rear suspension is used only with non-drive rear axles. 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 28

Technician A says that the top mounting nut for a rear shock absorber is often located inside the vehicle. Technician B says that shocks, struts, and springs should always be replaced in axle sets. 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 29

Identify this suspension type.

A)Independent suspension
B)Leaf spring suspension
C)Semi-independent suspension
D)Solid axle

Question 30

Which of these components is the Panhard rod?

A)A
B)B
C)C
D)D