Question 1

What is the function of steering axis inclination (SAI)?

Accepted Answer

SAI has three functions:
1. After a turn, SAI helps the vehicle return to straight ahead.
2. SAI keeps the vehicle going straight down the road. Although positive caster does this as well, more positive caster makes it harder to steer.
3. SAI allows the vehicle to have less positive caster (for easier steering) while still having good directional stability.

Question 2

When a vehicle makes a turn, the outside wheel must travel in a wider arc than the inside wheel. The alignment angle that controls this is MOST-Likely called:

Accepted Answer

A) set-back 
B) scrub radius 
C) turning radius 
D) tie-rod 
A) set-back 
B) scrub radius 
C) turning radius 
D) tie-rod C

Question 3

Which of the following statements is LEAST-Likely true?

Accepted Answer

A) Scrub radius is a factor of steering axis inclination. 
B) Scrub radius is the pivot point for the front tire's footprint. 
C) The junction of the steering axis and centerline pivot point is normally below the surface of the road. 
D) RWD vehicles generally have negative scrub radius. 
A) Scrub radius is a factor of steering axis inclination. 
B) Scrub radius is the pivot point for the front tire's footprint. 
C) The junction of the steering axis and centerline pivot point is normally below the surface of the road. 
D) RWD vehicles generally have negative scrub radius. D

Question 4

Provide definitions for the following terms: wheelbase and tracking.

Accepted Answer

The distance between the front and rear

Question 5

A change in toe setting does not affect the position of the steering wheel.

Accepted Answer

A) True 
 B)False

Question 6

Bent steering linkage will cause the toe setting to change. This affects the position of the steering wheel, which will now be off-center when traveling straight.

Accepted Answer

A) True 
 B)False

Question 7

____________________ is the inward or outward tilt of a tire at the top

Accepted Answer

The answer of ____________________ is the inward or outward tilt...

Question 8

____________________ is a measurement of the camber angle as it changes during a turn.

Accepted Answer

The answer of ____________________ is a measurement of the camber...

Question 9

The term MOST-Likely used to describe the distance at the road surface between the centerline of true vertical at the center of the tire tread and the steering axis pivot centerline is:

Accepted Answer

A) scrub radius 
B) tracking 
C) oversteer 
D) set-back 
A) scrub radius 
B) tracking 
C) oversteer 
D) set-back

Question 10

Every 1/16" of toe-in results in 11 feet per mile of ____________________.

Accepted Answer

The answer of Every 1/16" of toe-in results in 11...

Question 11

While having a discussion, Technician A says that when a vehicle has four-wheel alignment capability, the tendency to oversteer can be minimized by adjusting the camber on the rear wheels to a more negative setting than the front wheels. Technician B says that when tires of different profiles are installed on the same vehicle, the tires of the lower height are installed on the rear to prevent oversteer. Who is correct?

Accepted Answer

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

Question 12

The combination of SAI and camber is called the ____________________.

Accepted Answer

The answer of The combination of SAI and camber is...

Question 13

Which of the following statements is LEAST-Likely true?

Accepted Answer

A) When the front wheels on a car have different caster settings, the car will pull toward the side with the most positive caster. 
B) Negative caster is when the steering axis tilts forward, moving the point of load behind the wheel. 
C) During a turn, caster can cause the spindle to move either toward or away from the ground, depending on whether the caster is negative or positive. 
D) Caster is a directional control angle but does not cause tire wear when the vehicle is going straight. 
A) When the front wheels on a car have different caster settings, the car will pull toward the side with the most positive caster. 
B) Negative caster is when the steering axis tilts forward, moving the point of load behind the wheel. 
C) During a turn, caster can cause the spindle to move either toward or away from the ground, depending on whether the caster is negative or positive. 
D) Caster is a directional control angle but does not cause tire wear when the vehicle is going straight.

Question 14

____ is the forward or rearward tilt of the spindle support arm.

Accepted Answer

A) Scuff 
B) Camber 
C) Cradle 
D) Caster 
A) Scuff 
B) Camber 
C) Cradle 
D) Caster

Question 15

While having a discussion, Technician A says that if there is a tire blowout on the left side of a front-wheel-drive vehicle with positive scrub radius, the tire will pull hard to the left. Technician B says that it will pull hard to the right. Who is correct?

Accepted Answer

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

Question 16

____________________ is the alignment angle most responsible for tire wear.

Accepted Answer

The answer of ____________________ is the alignment angle most responsible...

Question 17

Negative camber is when a tire tilts outward at the top.

Accepted Answer

A) True 
 B)False

Question 18

All of the following statements are true EXCEPT:

Accepted Answer

A) a cambered tire tends to roll in a circle, as if it were at the large end of a cone. 
B) positive camber is when a tire tilts inward at the top. 
C) the camber angle is controlled by the position of the control arms or struts. 
D) unequal camber between tires on opposite sides of the vehicle can cause a steering pull to the side with the most camber. 
A) a cambered tire tends to roll in a circle, as if it were at the large end of a cone. 
B) positive camber is when a tire tilts inward at the top. 
C) the camber angle is controlled by the position of the control arms or struts. 
D) unequal camber between tires on opposite sides of the vehicle can cause a steering pull to the side with the most camber.

Question 19

What are some of the possible causes of incorrect scrub radius?

Accepted Answer

When tires and wheels that are too tall

Question 20

What are some of the possible causes of incorrect toe?

Accepted Answer

Several things can cause incorrect toe:

Exam 67: Wheel Alignment Fundamentals

What is the function of steering axis inclination (SAI)?

When a vehicle makes a turn, the outside wheel must travel in a wider arc than the inside wheel. The alignment angle that controls this is MOST-Likely called:

Which of the following statements is LEAST-Likely true?

Provide definitions for the following terms: wheelbase and tracking.

A change in toe setting does not affect the position of the steering wheel.

Bent steering linkage will cause the toe setting to change. This affects the position of the steering wheel, which will now be off-center when traveling straight.

____________________ is the inward or outward tilt of a tire at the top

____________________ is a measurement of the camber angle as it changes during a turn.

The term MOST-Likely used to describe the distance at the road surface between the centerline of true vertical at the center of the tire tread and the steering axis pivot centerline is:

Every 1/16" of toe-in results in 11 feet per mile of ____________________.

The combination of SAI and camber is called the ____________________.

Which of the following statements is LEAST-Likely true?

____ is the forward or rearward tilt of the spindle support arm.

While having a discussion, Technician A says that if there is a tire blowout on the left side of a front-wheel-drive vehicle with positive scrub radius, the tire will pull hard to the left. Technician B says that it will pull hard to the right. Who is correct?

____________________ is the alignment angle most responsible for tire wear.

Negative camber is when a tire tilts outward at the top.

All of the following statements are true EXCEPT:

What are some of the possible causes of incorrect scrub radius?

What are some of the possible causes of incorrect toe?

Introduction to the Automobile

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