Deck 9: Four Wheel Alignment Part 1 Primary Angles

Question 1

Front wheel camber is measured with the front wheels turned to the right.

Answer 1

False

Question 2

Technician A says incorrect wheel alignment angles will reduce tire tread life. Technician B says wheel alignment is necessary after ball joint replacement. Who is correct?

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

Answer 2

C

Question 3

Technician A says excessive positive caster may cause front wheel shimmy. Technician B says excessive positive caster increases steering effort and causes harsh riding. Who is correct?

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

Answer 3

C

Question 4

Positive caster occurs when the caster line through the centers of the lower ball joint and upper strut mount is tilted forward in relation to the true vertical centerline of the tire and wheel viewed from the side.

Question 5

All of the following are advantages of a four-wheel alignment EXCEPT:

A) Improved fuel mileage
B) Increase emissions
C) Improved vehicle handling
D) Longer tire life

Question 6

Some computer wheel aligners provide a ride height screen indicating where the ride height should be measured.

Question 7

Positive camber is the outward tilt of the camber line in relation to the true vertical centerline of the tire and wheel viewed from the front.

Question 8

Improper caster adjustment results in feathered tire wear.

Question 9

Technician A says wheel alignment angles are designed to provide improved ride qualities. Technician B says wheel alignment angles are designed to provide minimum tire tread wear and predictable directional control. Who is correct?

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

Question 10

Proper ride height adjustment is very important to maintain vehicle directional control and  safety.

Question 11

Excessive positive caster results in harsh ride quality.

Question 12

Technician A says a tire pressure check is not required before a wheel alignment. Technician B says a front wheel bearing play should be checked before a wheel alignment. Who is correct?

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

Question 13

Ride height can be adjusted by repositioning the upper strut mounts on a MacPherson strut front suspension.

Question 14

The thrust line is an imaginary line positioned at a 90 degree angle to the rear wheel centerline and projected forward.

Question 15

Technician A says excessive toe-out (negative) on a front wheel causes rapid wear on the inside edge of the tire tread. Technician B says excessive positive camber on a front wheel causes premature wear on the outside edge of the tire tread. Who is correct?

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

Question 16

All of these statements about improper caster are true EXCEPT:

A) May cause pull while braking
B) May cause feathered tire tread wear
C) May cause front wheel shimmy
D) May cause excessive steering effort

Question 17

Caster adjustments may be provided by all of these methods EXCEPT:

A) Adjusting tie-rod length
B) Adjusting strut rod length
C) Upper control arm shims
D) Upper control arm eccentrics

Question 18

Excessive toe-in on the front wheels causes wear on the inside edge of the tire treads.

Question 19

What effect will an incorrect rear wheel thrust angle have on the front suspension?

A) It will affect steering wheel position
B) Steering shimmy
C) Cause camber tire wear
D) Affect front steering axis inclination

Question 20

Diagonal wear lines on the rear tires could be caused by what?

A) Toe angle error
B) Camber angle error
C) Wheel offset
D) Ride height error

Question 21

Excessive toe-out on the right-rear wheel causes all of these problems EXCEPT:

A) Feathered tire tread wear
B) Steering pull to the left
C) Incorrect thrust angle
D) Incorrect right-rear camber angle

Question 22

The imaginary line extending forward at a 90 degree angle from the center of the rear axle is called what?

Question 23

What effect does negative camber have on tire tread wear?

Question 24

All of these statements about excessive negative camber on the right-front wheel are true EXCEPT:

A) It causes wear on the inside edge of the tire tread
B) It causes harsh ride quality
C) It may cause steering pull to the left
D) It causes an improper included angle

Question 25

All of these defects may cause improper rear wheel toe EXCEPT:

A) A bent strut
B) A bent rear spindle
C) A bent trailing arm
D) A bent rear tie rod

Question 26

Steering pull to the right occurs only when braking. The most likely cause of this problem is:

A) Excessive positive camber on the left-front wheel
B) Excessive positive caster on the right-front wheel
C) Excessive toe-out on the right-front wheel
D) A loose strut rod bushing on the right-front suspension

Question 27

When one of the front wheels strikes a road irregularity, the steering suddenly veers to the right or left on a vehicle with a parallelogram steering linkage. The most likely cause of this problem is:

A) Worn-out shock absorbers
B) A weak stabilizer bar
C) Sagged coil springs
D) Center link that is not level

Question 28

Technician A says a jack-and-hold feature on some computer wheel aligners allows the technician to lift one side of the suspension with a jack while maintaining accurate alignment readings on the screen. Technician B says when using a computer wheel aligner, the technician may print out any screen at any time. Who is correct?

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

Question 29

Technician A says front wheel toe should be measured with the front wheels in the straight-ahead position. Technician B says excessive front wheel toe-in causes steering pull to the right. Who is correct?

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

Question 30

Excessive toe-in on the left-rear wheel moves the thrust line in what direction compared to the geometric centerline of the vehicle?

Question 31

Technician A says the fuel tank should be full when performing a wheel alignment. Technician B says after the front struts are replaced, a wheel alignment should be performed. Who is correct?

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

Question 32

During a road test on a front-wheel drive vehicle, it is determined that the vehicle pulls right after a right turn, and pulls left after a left turn. The most likely cause of this condition is:

A) A binding upper strut bearing
B) Excessive lower ball joint play
C) Excessive positive caster
D) A misaligned subframe/cradle assembly

Question 33

When measuring front suspension caster angles, what must you do to the vehicle?

Question 34

Technician A says on many rear-wheel drive cars, the front wheels are set to a slight toe-in position. Technician B says the driving forces on a rear-wheel drive car tend to move the front wheels to a toe-in position. Who is correct?

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

Question 35

What effect does negative front wheel caster have on the vehicle?

Question 36

What effect does lowering the rear suspension height have on front wheel caster?

Question 37

All of these statements about negative caster are true EXCEPT:

A) It reduces steering effort
B) It decreases steering wheel return force
C) It decreases directional stability
D) It causes harsh ride quality

Question 38

Technician A says if a front wheel has positive camber, the camber line is at the true vertical centerline of the tire and wheel. Technician B says if the left-front wheel has excessive positive camber and the right-front wheel camber is correct, the steering pulls to the left. Who is correct?

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

Question 39

What term refers to the tendency of a vehicle to travel in a straight-ahead direction without being steered?

Question 40

Technician A says if the front wheels have a toe-out condition, the distance between the front edges of the tires is greater than the distance between the rear edges of the tires. Technician B says many front-wheel drive cars have a slight toe-out setting because driving forces tend to move the front wheels to a toe-in position. Who is correct?

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

Question 41

Explain the geometric centerline and the proper position of the front and rear wheels in relation to this centerline.

Question 42

Why does excessive positive camber wear the outside edges of the tire tread?

Question 43

How does positive caster provide increased directional stability?

Question 44

If the front suspension height is lowered on a McPherson strut suspension, what effect will this have on front wheel caster?

Question 45

When the steering linkage is positioned in front of the steering axle of the front wheels, driving force tends to do what to the steering linkage?

Question 46

In a rear suspension system with a lower control arm and ball joint, worn lower control arm bushings cause the rear wheel camber to move in what direction?

Question 47

What type of front-wheel toe setting are many rear-wheel drive vehicles set to?

Question 48

How does positive caster provide for increased steering wheel return force?

Question 49

If the thrust line is positioned to the right of the geometric centerline of the vehicle, the steering wheel will be pulled toward what direction?

Question 50

Explain why the rear wheel toe angle, thrust angle, and camber should be correct before adjusting the front suspension angles.

Question 51

What is the camber angle if the centerline of the tire and wheel is tilted inward in relation to the true vertical centerline of the tire and wheel?

Question 52

Describe toe-out.

Question 53

How can caster settings be used to compensate for road crown?

Question 54

On a MacPherson strut front suspension with an adjustable upper control arm mount, explain the necessary mount movement to decrease positive caster.

Question 55

Why is a four-wheel alignment essential on vehicles with independent or semi-independent rear suspension systems?

Question 56

What type of tire wear occurs if the toe setting is excessively positive?

Question 57

What effect do sagging front springs have when the steering linkage is positioned behind the steering axle of the front wheels?