Deck 46: Suspension Systems

Question 1

Adjustable air shocks can be manually filled.

Answer 1

True

Question 2

Variable rate springs handle a load of up to 30 percent over standard rate springs in some applications.

Answer 2

True

Question 3

The core of any suspension system is the ______.

A) wheel spindle assembly
B) spring
C) ball joint
D) control arm

Answer 3

B

Question 4

Multileaf springs are fixed rate springs.

Question 5

When the shoulder on a grease fitting of a ball joint is flush with the housing, the ball joint needs to be replaced.

Question 6

The simplest way to remove a ball joint is by heating the control arm near the ball joint with an oxyacetylene torch, then driving the ball joint out using a hammer and brass drift.

Question 7

All leaf springs are mounted to the vehicle lengthwise.

Question 8

Torsion bars are directional and are marked either right or left to identify on which side it is to be used.

Question 9

The motion of compression and extension, in a shock absorber, is converted into heat energy and dissipated into the atmosphere.

Question 10

A centering pin is often used on a leaf spring to keep the axle properly located on the springs.

Question 11

Active suspension systems can eliminate body roll while cornering.

Question 12

Most coil springs are made from die-cast iron.

Question 13

Shock absorbers are always mounted vertically, not at an angle.

Question 14

The faster a shock absorber moves, the more resistance it has to the movement.

Question 15

Semi-independent suspensions are used on the rear of many front-wheel drive cars.

Question 16

Springs are rubber mounted to reduce road shock and noise.

Question 17

Leaf springs typically accompany MacPherson strut suspensions.

Question 18

Shock absorbers, despite their name, actually dampen spring movement instead of absorbing shock.

Question 19

Unusual tire wear patterns can be caused by worn shock absorbers.

Question 20

Springs carry the weight of the vehicle and absorb shock forces.

Question 21

Technician A says load-carrying ball joints may have a small amount of play in them. Technician B says follower ball joints should have some play in them. Who is correct?

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

Question 22

Technician A says a weak suspension spring can affect the wheel alignment. Technician B says a weak suspension spring can cause poor braking. Who is correct?

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

Question 23

What controls the up-and-down movement of a vehicle as it moves down a bumpy road?

A) struts
B) shock absorbers
C) both "struts" and "shock absorbers"
D) neither "struts" nor "shock absorbers"

Question 24

Electronically controlled suspensions are ______ systems.

A) simple load-leveling
B) adaptive
C) fully active
D) all answers are correct

Question 25

Technician A replaces coil springs in pairs. Technician B marks the coil springs for position and orientation when removing coil springs that will be reused. Who is correct?

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

Question 26

Which of the following is NOT a component of an adaptive suspension system?

A) steering angle sensor
B) vehicle height sensor
C) electronic shock absorbers
D) hydraulic pump

Question 27

Vehicle height is checked with the fuel tank ______.

A) one-quarter full
B) one-half full
C) three-quarters full
D) full

Question 28

The coil springs of the vehicle ______.

A) support the weight of the vehicle
B) respond to wheel jounce
C) respond to wheel rebound
D) all answers are correct

Question 29

Most passenger cars use a shock with a _____ ratio.

A) 80/20
B) 40/60
C) 90/10
D) 50/50

Question 30

Torsion bar suspension is usually found on ______.

A) high-performance cars
B) luxury cars
C) economy cars
D) light pickup trucks and SUVs

Question 31

Strut designs are being discussed. Technician A says in the conventional MacPherson strut, the coil spring surrounds the upper part of the strut. Technician B says in the modified MacPherson strut, the coil spring is located between the control arm and frame/unibody. Who is correct?

A) A only
B) B only
C) both A and B
D) Neither A or B

Question 32

What occurs when a wheel hits a dip or hole and moves downward?

A) jounce
B) free length
C) deflection
D) rebound

Question 33

Technician A says leaf springs may be made of cast iron. Technician B says leaf springs may be made from a fiber composite material. Who is correct?

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

Question 34

A typical SLA suspension system has ______.

A) an upper short arm and a lower long arm
B) two arms of equal length
C) a lower short arm and an upper long arm
D) none of these answers is correct

Question 35

Technician A says cars that use unibody construction are lighter than body-on-frame vehicles of comparable size. Technician B says in body-over-frame construction, all major parts of the vehicle are attached to the frame. Who is correct?

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

Question 36

Technician A says adaptive suspensions can alter ride height while the vehicle is in motion. Technician B says active suspensions use air-operated actuators. Who is correct?

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

Question 37

Coil spring designs and ratings are being discussed. Technician A says coil springs may have a linear rate. Technician B says coil springs may have a variable rate. Who is correct?

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

Question 38

Technician A says periodic adjustment of the torsion bars is necessary to maintain the proper ride height. Technician B says torsion bars are interchangeable from side to side. Who is correct?

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

Question 39

Technician A says polyurethane suspension bushings improve the vehicle's road-holding ability and handling. Technician B says polyurethane suspension bushings help reduce torque steer in FWD vehicles. Who is correct?

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

Question 40

Technician A says conventional shock absorbers dampen spring movement. Technician B says conventional shock absorbers absorb shock. Who is correct?

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

Question 41

A coil spring that is cylindrical in overall shape and has closely spaced coils at one end and widely space coils at the other end is called a _____ spring.

A) torsional reflex
B) progressive rate
C) truncated cone
D) barrel

Question 42

_____ occurs when the wheel hits a dip or hole and moves downward.

A) Jounce
B) Rebound
C) Compression
D) Deflection

Question 43

Which of the following would NOT cause rattling noise on road irregularities?

A) worn shock absorber bushings
B) leaking shock absorbers
C) broken spring insulators
D) worn strut rod grommets

Question 44

Which of the following is not a type of leaf spring?

A) carbon/carbon composite
B) multiple leaf
C) fiber composite.
D) monoleaf

Question 45

A technician is checking a suspension complaint. He depresses the front bumper a few inches by hand then releases it. When the front bumper is released, it oscillates up and down about three times before coming to rest. What could be the problem?

A) worn ball joints
B) worn stabilizer links
C) worn shock absorbers
D) worn springs

Question 46

Ball joints are being discussed. Technician A says a load-carrying ball joint supports the car's weight and is generally found on the control arm that the spring rests on. Technician B says all ball joints require periodic lubrication. Who is correct?

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

Question 47

Technician A says a typical car shock has more resistance during compression [jounce]. Technician B says mounting shock absorbers at an angle improves vehicle stability and dampens accelerating and braking torque. Who is correct?

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

Question 48

The amount of load necessary to deflect the spring 1 inch (25.4 mm) is the _____.

A) compliance ratio
B) deflection index
C) load rate
D) spring rate

Question 49

When both front wheels go into jounce, the stabilizer bar _____.

A) transfers the jounce force from the front wheels to the rear axle
B) transfers the jounce force to the shock absorbers
C) transfers the jounce force to the frame/unibody
D) pivots in its bushings, but does not transfer any force

Question 50

Which type of spring is the lightest?

A) monoleaf
B) multileaf
C) fiberglass leaf
D) quarter leaf

Question 51

High-performance suspension bushings made of _____ improve handling and reduce torque steer on FWD cars.

A) polyurethane
B) teflon
C) silicon
D) carbon fiber

Question 52

Which of the following is not part of an upper strut [MacPherson] mount?

A) ball bearing
B) rubber core
C) upper spring seat
D) upper ball joint

Question 53

The sway bar link connects the sway bar to the ______.

A) steering knuckle
B) lower control arm
C) frame/unibody
D) torsion bar

Question 54

The ball joint on a conventional MacPherson strut system is a _____-type ball joint.

A) compression
B) tension
C) follower
D) none of these answers is correct

Question 55

Gas-filled shock absorbers perform better on rough roads because the pressurized gas _____.

A) increases the spring rate
B) increases extension resistance
C) helps prevent fluid aeration
D) absorbs heat energy

Question 56

Suspension bushings are being discussed. Technician A says the rubber bushings used in a control arm flex and twist as the control arm moves up and down. Technician B says rubber bushings should be lubricated with petroleum-based lubricants every 30,000 miles. Who is correct?

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

Question 57

In what type of leaf spring is the center of the spring mounted to the vehicle's chassis and the outer ends fastened to the ends of the axle housing or wheel spindles?

A) asymmetrical
B) longitudinal
C) transverse
D) bilateral

Question 58

Which of the statements about follower-type ball joints is NOT true?

A) A follower ball joint mounts on the control arm that does not provide a seat for the spring
B) The follower does not get the same stress as the load carrier
C) Follower-type ball joints can rotate right and left, but cannot pivot up and down
D) The follower does not support vehicle weight

Question 59

Technician A says the shackle prevents fore and aft movement of a leaf spring. Technician B says most leaf springs are semi-elliptical. Who is correct?

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

Question 60

Technician A says torsion bars are used in pickup trucks and SUVs because they can be mounted low and out of the way of the driveline components. Technician B says one end of the bar is attached to the vehicle frame. The other end is attached to the steering knuckle. Who is correct?

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

Question 61

A weak spring will NOT cause _____.

A) poor braking
B) abnormal steering
C) premature U-joint failure
D) premature ball joint failure

Question 62

____________________ suspensions use hydraulically operated actuators rather than air controlled. These systems respond almost perfectly to various operating conditions.

Question 63

The ____________________ spring design uses only a single leaf.

Question 64

The ____________________ bar provides directional stability by reducing body roll.

Question 65

After installing a new control arm bushing, the control arm end cap nuts or bolts should not be torqued until the vehicle _____.

A) is at its curb height
B) has been bounced and allowed to settle out
C) front end has been aligned
D) both "is at its curb height" and "has been bounced and allowed to settle out"

Question 66

The ____________________ bar provides directional stability by reducing body roll.

Question 67

To reduce noise and friction, multileaf springs have interleaves of zinc and ____________________ placed between the spring's leaves.

Question 68

The simplest types of electronically controlled suspension systems are automatic level control systems that use electronic height sensors to control an air compressor linked to ____________________ shock absorbers.

Question 69

Radial and axial in the ball joints is checked using a _____.

A) straightedge
B) dial caliper
C) beam-type torque wrench
D) dial indicator

Question 70

When checking the front ball joints on a vehicle that has the springs mounted on the lower control arms, a jack should be placed under the _____ to take the spring tension off the ball joint.

A) inboard end of the lower control arm
B) outboard end of the lower control arm
C) frame/unibody
D) strut rod

Question 71

____________________ occurs when the wheel hits a dip or hole and moves downward.

Question 72

A short-long arm suspension system is also called a(n) ____________________ length arm suspension system.

Question 73

____________________ suspension systems use electronic shock absorbers with variable valving. In some cases, variable air spring rates are used to adapt the vehicle's ride characteristics to the prevailing road conditions or driver demands.

Question 74

What type of rear suspension is subject to axle tramp, a rapid up-and-down jumping of the rear axle?

A) live axle with coil springs
B) live axle with leaf springs
C) double wishbone
D) multilink

Question 75

Control arms are attached to the frame of the vehicle with ____________________ elastomeric bushings.

Question 76

In an electronic shock absorber, variable shock damping is accomplished by varying
the size of the ____________________ inside the shock.

Question 77

____________________ occurs when the wheel hits a bump and moves up.

Question 78

The most advanced computer-controlled suspension systems are true active suspensions. They use high-pressure _____ actuators to carry the vehicle's weight rather than conventional springs or air springs.

A) hydraulic
B) pneumatic
C) electromagnetic
D) vacuum

Question 79

A variable rate spring design that has a cylindrical shape with unequally spaced coils is called a(n) ____________________ rate coil spring.

Question 80

Ball joints are mounted to the control arms by ______.

A) rivets and bolts
B) press fit
C) being threaded into the control arm
D) all answers are correct