1. Which component is responsible for connecting the wheels to the vehicle’s chassis and absorbing shocks from the road surface?
a) Stub axle
b) Front wheel assembly
c) Front axle beam
d) Steering gear
Answer: c) Front axle beam
Explanation: The front axle beam connects the front wheels to the vehicle’s chassis and absorbs shocks from the road surface, contributing to the vehicle’s stability and handling.
2. What is the purpose of camber in front wheel geometry?
a) To stabilize the vehicle during cornering
b) To maintain proper tire contact with the road
c) To assist in steering response
d) To minimize tire wear
Answer: b) To maintain proper tire contact with the road
Explanation: Camber refers to the angle of the wheels concerning the vertical axis. It helps ensure that the tire’s contact patch remains flat on the road surface for optimal traction and handling.
3. Which steering geometry parameter influences the vehicle’s self-centering tendency after turning?
a) Camber
b) Kingpin inclination
c) Castor
d) Toe-in
Answer: c) Castor
Explanation: Castor is the angle between the steering axis and the vertical axis. A higher castor angle enhances the vehicle’s self-centering tendency after a turn, contributing to directional stability.
4. What is the purpose of toe-in in wheel alignment?
a) To improve straight-line stability
b) To enhance cornering performance
c) To minimize tire wear
d) To reduce steering effort
Answer: a) To improve straight-line stability
Explanation: Toe-in refers to the slight inward angle of the front wheels when viewed from above. It helps improve straight-line stability by counteracting the tendency for the wheels to splay outward during forward motion.
5. Which condition is necessary for achieving true rolling motion of the wheels?
a) Toe-out
b) Toe-in
c) Camber misalignment
d) Equal tire pressures
Answer: d) Equal tire pressures
Explanation: True rolling motion occurs when all wheels have equal pressure and rotate without skidding or slipping, contributing to efficient vehicle operation and tire longevity.
6. What is the primary function of power steering?
a) To increase steering wheel resistance
b) To enhance steering precision
c) To reduce steering effort
d) To improve cornering stability
Answer: c) To reduce steering effort
Explanation: Power steering systems assist the driver by reducing the amount of physical effort needed to turn the steering wheel, especially at low speeds or when parking.
7. What term describes the angle between the direction a wheel is pointing and the direction it is traveling during cornering?
a) Slip angle
b) Cornering power
c) Oversteer
d) Understeer
Answer: a) Slip angle
Explanation: The slip angle represents the difference between the direction a wheel is pointing and the direction it is traveling, influencing the tire’s lateral force and the vehicle’s cornering behavior.
8. Which phenomenon occurs when a vehicle’s rear tires lose traction and begin to slide outward during a turn?
a) Oversteer
b) Understeer
c) Power steering failure
d) Wheel alignment issue
Answer: a) Oversteer
Explanation: Oversteer describes the tendency for a vehicle’s rear end to swing outward during a turn, often leading to a loss of control if not corrected by the driver.
9. How does the gyroscopic effect influence steering gears?
a) It reduces steering precision
b) It increases steering effort
c) It stabilizes steering motion
d) It causes power steering failure
Answer: c) It stabilizes steering motion
Explanation: The gyroscopic effect, resulting from the rotation of wheels, contributes to stabilizing steering motion and maintaining the vehicle’s straight-line trajectory, especially at higher speeds.
10. Which steering system component directly affects the vehicle’s directional stability?
a) Front wheel assembly
b) Stub axle
c) Kingpin inclination
d) Steering gear
Answer: c) Kingpin inclination
Explanation: Kingpin inclination, the angle between the kingpin axis and the vertical axis, significantly influences the vehicle’s directional stability by promoting self-centering behavior and minimizing steering effort.