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
- 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
- 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
- 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
27. What information is presented in a letter-number sequence on the sidewall of
- 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"
- 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
- 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
- A. A
- B. A+
- C. AA
- D. AAA
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