Deck 7: Rear Suspension Systems

Question 1

Rear axle tramp occurs during:

A) Cornering at high speeds
B) High-speed driving
C) Deceleration
D) Hard acceleration

Answer 1

D

Question 2

Some independent rear suspension systems have a ball joint that attaches the lower control arm to the bottom of the knuckle.

Answer 2

True

Question 3

In a multilink rear suspension system, dual upper links connect the top of the strut to the chassis.

Answer 3

False

Question 4

Rear axle tramp occurs during hard braking.

Question 5

Technician A says when measuring rear suspension curb riding height, the vehicle should be parked on a level floor. Technician B says excessive rear curb riding height causes reduced directional stability. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 6

Technician A says in a semi-independent rear suspension system, improper rear wheel toe and tracking may be caused by a bent trailing arm. Technician B says on a semi-independent rear suspension system, improper rear wheel toe and tracking may be caused by a bent inverted U-channel. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 7

Some semi-independent rear suspensions have a solid inverted U-section channel connected between the trailing arms.

Question 8

In a MacPherson strut-type rear suspension, the struts are bolted to the top of the spindles.

Question 9

In a rear-wheel drive vehicle with a live-axle rear suspension, the acceleration torque tends to rotate the front of the differential downward.

Question 10

Variable rate rear springs may cause excessive rear body sway when driving on irregular road surfaces.

Question 11

The adjustment link in a multilink rear suspension:

A) Reduces fore-and-aft rear wheel movement
B) Absorbs engine torque transmitted through the drive shaft
C) Provides a rear wheel caster adjustment
D) Provides a rear wheel toe adjustment

Question 12

Rear-wheel drive trucks and vans have independent rear suspension systems.

Question 13

On a live-axle, leaf-spring rear suspension system, improper rear wheel tracking may be caused by:

A) Sagged rear springs
B) Worn spring insulators
C) A broken spring center bolt
D) Broken spring leaves

Question 14

Excessive rear chassis lateral movement may be caused by:

A) Worn track bar bushings
B) Worn stabilizer bar bushings
C) A bent trailing arm
D) A bent lower control arm

Question 15

Technician A says decreased steering effort may be caused by sagged rear springs. Technician B says sagged rear springs may cause fast steering wheel return. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 16

Independent rear suspensions have all of these advantages EXCEPT:

A) Improved traction
B) Better ride quality
C) Decreased directional stability
D) Improved tire tread life

Question 17

Reduced rear curb riding height may cause damaged rear strikeout bumpers.

Question 18

A defective track bar may cause rear chassis waddle.

Question 19

Rear axle tramp is caused by:

A) A bent rear control arm
B) Improper rear wheel alignment
C) Irregular rod surfaces
D) Drive line torque transmitted through the drive shaft

Question 20

In a semi-independent rear suspension system, some  individual wheel movement is provided by:

A) The struts
B) The trailing arms
C) The track bar and brace
D) The U-section channel and integral stabilizer bar

Question 21

All of these statements about a live-axle leaf-spring  rear suspension are true EXCEPT:

A) The differential torque in a live-axle rear suspension  is applied to the springs.
B) While decelerating and braking, the front of the   differential twists downward.
C) This type of rear suspension has a small amount  of unsprung weight.
D) During acceleration the front of the differential  twists upward.

Question 22

When the rear suspension ride height is sagging below specifications, what will happen to the caster angle on the front suspension?

Question 23

The jounce bumpers on the rear struts are severely damaged. Technician A says the rear struts may be worn out. Technician B says the rear spring may be worn. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 24

In a semi-independent rear suspension system:

A) The trailing arms prevent lateral wheel  movement.
B) The lower coil-spring seats may be on the trailing  arms.
C) The lower end of the shock absorbers may be  attached to the track bar.
D) The track bar and brace absorb differential  torque.

Question 25

A modified MacPerson strut rear suspension is being discussed. Technician A says the tie rod prevents fore-and-aft rear wheel movement. Technician B says the strut prevents lateral rear wheel movement. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 26

Technician A says the ball joint is pressed into the lower control arm in some independent rear suspension systems. Technician B says when tightening the lower control arm to chassis retaining bolts on independent rear suspension systems, the vehicle weight should be resting on the tires. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 27

A MacPherson strut rear suspension system is being discussed. Technician A says worn stabilizer bar bushings cause lateral wheel movement. Technician B says worn stabilizer bar bushings may cause excessive tire tread wear. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 28

Sagged rear springs may cause:

A) Harsh ride quality
B) Decreased positive caster on the front wheels
C) Decreased steering effort
D) Slow steering wheel return after turning a corner

Question 29

Axle tramp on a live-axle, coil-spring rear suspension system is being discussed. Technician A says engine torque transmitted through the drive shaft causes rear axle tramp. Technician B says rear axle tramp occurs during hard acceleration at lower speeds. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 30

What type of rear suspension system has a transverse, solid-axle beam fabricated from a U-section channel?

Question 31

The adjustment link in a multilink rear suspension:

A) Provides a rear wheel toe adjustment
B) Reduces fore-and-aft rear wheel movement
C) Absorbs engine torque transmitted through the  drive shaft
D) Provides a rear wheel caster adjustment

Question 32

In a modified MacPherson strut independent rear suspension, where is the coil spring located?

Question 33

On an independent rear suspension system, the right-rear tire has excessive wear on the inside edge of the tread. The most likely cause of this problem is:

A) Worn lower control arm bushings
B) A failed rear sway bar link
C) A worn-out right-rear strut
D) Low tire pressure

Question 34

What is the most important component that provides proper curb riding height for the rear suspension?

Question 35

The left-rear upper spring insulator is broken on a MacPherson strut suspension system. The most likely result of this problem is:

A) Harsh ride quality
B) Increased left-rear positive camber
C) Increased toe-out on the left-rear wheel
D) A rattling noise on irregular road surfaces

Question 36

When does axle tramp occur?

Question 37

In a MacPherson strut independent rear suspension  system:

A) The lower end of each strut is attached to the strut  rod.
B) The spring seats are positioned on the struts.
C) The ends of the coil spring are in direct contact   with the spring seats.
D) The upper spring seat is positioned in a chassis   support.

Question 38

During acceleration with a rear-wheel drive light-duty truck, the front of the differential is twisted in what direction?

Question 39

Reduced curb riding height on the rear suspension causes all of these problems EXCEPT:

A) Increased positive camber on the rear wheels
B) Harsh ride quality
C) Increased positive caster on the front wheels
D) Fast steering wheel return

Question 40

All of these statements about modified MacPherson  strut suspension systems are true EXCEPT:

A) The strut is bolted to the lower end of the spindle.
B) The upper strut mount is retained on top of the  strut.
C) The lower control arms prevent lateral wheel  movement.
D) The tie rods control fore-and-aft wheel movement.

Question 41

Describe the rear axle beam design in a semi-independent rear suspension system.

Question 42

Explain the purpose of the rear suspension adjustment links in an independent rear suspension system with a lower control arm and ball joint.

Question 43

Describe the purpose of a leaf-spring shackle.

Question 44

Explain the advantages of a double wishbone rear suspension system.

Question 45

In a multilink independent rear suspension, how is the rear suspension member connected to the rear knuckle?

Question 46

When the rear springs are sagged, what angle is changed in front suspension alignment?

Question 47

Explain the purpose of the rear suspension adjustment links in an independent rear suspension system with a lower control arm and ball joint.

Question 48

In an independent rear suspension system on a rear-wheel drive car, attaching the differential housing to the chassis reduces what?

Question 49

Describe the purpose of a track bar in a rear suspension system.

Question 50

Reduced curb riding height on the rear suspension causes what problems?

Question 51

Explain the advantages of an independent rear suspension system.

Question 52

Describe the differential movement during acceleration on a live-axle rear suspension system, and explain how this action occurs.