12.8 Exercises for Unit 12

1. Which requirement is NOT satisfied by the components of the vehicle chassis?

A. Support the vehicle and its payload.
B. Provide for directional control.
C. Allow smooth operation over rough terrain.
D. Enclose the mechanical components and passenger compartment.

2. Why are the side members of many passenger vehicle frames closer together in the front than in the rear?

A. To supply more rigid support for the engine.
B. To allow the vehicle to make sharper turns.
C. To supply a more rigid support for the front wheels.
D. To reduce vibration from the engine.

3. What type of frame construction allows an increase in the amount of noise transmitted into the passenger compartment?

A. Ladder
B. Integrated
C. Separated
D. Jack

4. What component of the suspension system prevents the control arm from swinging to the front or rear of the vehicle?

A. Control arm bushings
B. Strut rod
C. Stabilizer bar
D. Strut

5. In a vehicle equipped with MacPherson struts, what component does the strut assembly replace?

A. Upper control arm
B. Lower control arm
C. Upper damper unit
D. Steering knuckle

6. What term refers to the stiffness or tension of a spring?

A. Elastic tolerance
B. Spring ratio
C. Elastic deformation
D. Spring rate

7. As a vehicle goes over a bump, its multileaf springs are held together by the _____.

A. spring shackles
B. rebound clips
C. bumper blocks
D. clip plates

8. What component in a bogie suspension system distributes the rear load evenly to the axles?

A. Cross shaft
B. Trunnion axle
C. Springs
D. Torque rods

9. What suspension component when worn will make a clunking or popping sound when the vehicle is turning or driving over a bump?

A. Ball joint
B. Strut rod
C. Control arm
D. Torsion bar

10. What tool is used to measure the axial play of a ball joint?

A. Spring gauge
B. Micrometer
C. Dial indicator
D. Outside caliper

11. What condition lowers the height of the vehicle, allowing the body to settle towards the axles?

A. Faulty struts
B. Spring fatigue
C. Weak shock absorbers
D. Worn control arm bushings

12. What two factors are used to determine steering ratio?

A. Steering linkage ratio and steering mechanism gear ratio
B. Turning ratio and steering linkage ratio
C. Steering mechanism gear ratio and diameter of the pinion gear
D. Diameter of the worm gear and diameter of the pinion gear

13. Which system is NOT a type of manual steering?

A. Cam and lever
B. Rack and pinion
C. Sector and lever
D. Worm and nut

14. What ratio does the design of the worm and roller steering gear provide?

A. High steering
B. Low steering
C. Medium steering
D. Variable steering

15. What is the most common type of worm and nut steering gear?

A. Rolling ball
B. Rotating ball
C. Recirculating ball
D. Reducing ball

16. In a manual rack-and-pinion steering gear, what component preloads the rack- and-pinion gear teeth to prevent excessive backlash?

A. Thrust plate
B. Thrust spring
C. Thrust washer
D. Thrust bearing

17. What are the three types of power steering systems?

A. Internal rotor, external spool, and rack-and-pinion
B. Internal spool, external slipper, and rack-and-pinion
C. Integral cylinder, external piston, and rack-and-pinion
D. Integral piston, external cylinder, and rack and pinion

18. What is the most common type of power steering system?

A. Integral piston
B. Integral cylinder
C. Internal spool
D. Internal rotor

19. When you check an idler arm for wear, as a general rule the idler arm should NOT move up and down more than _____ inch.

A. 1/8
B. 1/2
C. 1/3
D. 1/4

20. What are the two basic adjustments that may be made on a manual steering gearbox?

A. Over-center clearance and worm bearing preload
B. Sector bearing preload and pinion clearance
C. Pinion shaft preload and worm shaft clearance
D. Cam clearance and lever bearing preload

21. Which problem is NOT common to the steering system?

A. Hard steering
B. Steering wheel play
C. Steering wheel vibration
D. Abnormal sounds when turning

22. Which steering problem may be caused by improper frame alignment?

A. Excessive steering wheel play
B. Abnormal noises when turning
C. Hard steering
D. Steering wheel vibration

23. What are the two basic functions of a tire?

A. To support the weight of the vehicle and provide adequate traction.
B. To act as a cushion between the road and the wheel, and provide adequate traction on any road.
C. To prevent road shock from being felt in the passenger compartment and provide adequate traction.
D. To provide a means to control the vehicle and to provide traction.

24. What part of the tire has two steel rings encased in rubber that hold the sidewalls against the rim?

A. Body plies
B. Tire bead
C. Belts
D. Liner

25. What is a major disadvantage of a bias-ply tire?

A. The strength of the plies decrease traction.
B. It provides a rough ride on smooth roads.
C. The body of the tire is too rigid.
D. It increases rolling resistance.

26. A radial tire has plies running in which direction?

A. Straight across from bead to bead with stabilizer belts directly beneath the tread
B. From the sidewall at different angles than the stabilizer belts
C. At an angle from bead to bead with the stabilizer belts between each ply
D. Straight across from the sidewall with the stabilizer belts at a different angle

27. What information is presented in a letter-number sequence on the sidewall of a tire?

A. Tire size
B. Treadwear rating
C. Speed rating
D. Load index

28. A tire has a P-metric tire size-rating system. What does the letter "P" indicate?

A. Pneumatic
B. Ply rating
C. Passenger
D. Performance

29. What term refers to the comparison of the height of the tire to the width of the tire?

A. Section width
B. Aspect ratio
C. load index
D. Treadwear rating

30. What factors determine how much of a load a tire can safely carry?

A. Load range and speed index
B. Load index and aspect ratio
C. Load range and the grade of the tire
D. Load index and proper inflation pressure

31. For every 10 degrees Fahrenheit change in ambient temperature, the inflation pressure of a tire will change by _____ psi.

A. 1
B. 2
C. 3
D. 4

32. In 1997, what traction rating was introduced to indicate a greater wet braking traction?

A. A
B. A+

33. What temperature resistance grade is the minimum level of performance for all passenger vehicle tires?

A. B
B. D
C. A
D. C

34. For easy identification, a butyl type synthetic rubber tube has a stripe on it that is what color?

A. Green
B. Blue
C. Red
D. White

35. A lug nut has the letter "M" stamped into it. What does the "M" indicate?

A. Military thread
B. Multipurpose thread
C. Metric thread
D. Machine thread

36. In a nondriving wheel bearing and hub assembly, what component extends outward from the steering knuckle?

A. Hub
B. Outer drive axle
C. Spindle
D. Bearing support

37. Using a plug to attempt a tire repair without dismounting the tire is effective only what percentage of the time?

A. 50
B. 60
C. 70
D. 80

38. You should NOT attempt to repair a tubeless tire that has a puncture larger than _____ inch.

A. 1/16
B. 1/8
C. 1/4
D. 1/2

39. What type of tire imbalance will cause the tire to vibrate up and down and from side to side?

A. Static
B. Radius
C. Dynamic
D. Spiral

40. If a large amount of weight is required to static balance a wheel and tire assembly, you should distribute the weight in what manner?

A. Add half to the outside and half to the inside.
B. Add a quarter to the outside and the rest to the inside.
C. Add a quarter to the inside and the rest to the outside.
D. Add exactly where needed.

41. What is the most common type of balancer?

A. Spin balancer
B. On-the-vehicle balancer
C. Bubble balancer
D. Computerized balancer

42. What type of tread wear pattern is caused by excessive camber?

A. Feathering
B. Cupping
C. One-side wear
D. Cornering wear

43. What type of alignment ensures that the wheels are "squared" to each other?

A. Front-end alignment
B. Frame alignment
C. Thrust angle alignment
D. Steering alignment

44. Negative caster tilts the top of the steering knuckle towards the _____of the vehicle.

A. rear
B. front
C. right side
D. left side

45. What wheel alignment angle is determined by the difference in the distance between the front and the rear of the left and right wheels?

A. Steering axis inclination
B. Toe
C. Tracking
D. Toe-out on turns

46. When you are performing a wheel alignment on a front-wheel drive vehicle, what amount of toe-out is required, in inches?

A. 1/16
B. 1/8
C. 1/4
D. 1/2

47. Which of the following conditions will cause improper tracking?

A. Bent rear axle mount
B. Bent control arm
C. Broken shock mount
D. Loose sway bar