ASE A4 practice test. (A+ Graded Already)

2. A driver says that the front end of his car vibrates up and down while traveling at most road speeds. Tech A says that too much runout of the front wheels could be the cause. Tech B says that a static out of balance of the front wheels could be the cause. Who is right? A. Tech A only B. Tech B only C. Both A and B D. Neither A or B correct answers C. Both Techs are right. Too much runout or static out of balance in the front wheels will cause a vibration 3. A vehicle has front wheel shimmy at low speed and requires increased steering effort. Tech A says that too much positive camber could be the cause. Tech B says that too much Positive caster could be the cause. Who is right? A Tech A only B. Tech B only C. Both A and B D. Neither A or B correct answers B. Excessive positive caster will increase steering effort, cause the steering wheel to return too rapidly. cause wander at high speed and shimmy at low speed. 4. All of these could cause tire wear if not within manufacturer's Specs EXCEPT: A. Caster B. Wheel balance C. Toe-In D. Camber correct answers A. Caster that is out of spec will affect steering and handling characteristics, but will not cause tire wear. Whereas, too much toe in or out would severely wear the tires. Additionally, excessive camber would cause inside or outside shoulder wear on the tire, depending on whether the camber was too negative or positive. 5. A vehicle with variable assist power steering has a lack of power assist in both directions. Tech A says That the problem is in the electronic control system. Tech B says that there could be a problem in the steering gear or a bad power steering pump. Who is right? A. Tech A only B. Tech B only C. Both A and B D. Neither A or B correct answers B. Although further diagnosis will be necessary, Tech B is right. Tech A is wrong because, when there is a malfunction in a variable assist power steering system, the system will allow full power steering. 6. A customer complains that a vehicle wanders on a bumpy road and needs continual driver correction to stay straight. What could be Wrong? A. Excessive negative front caster B. Insufficient front toe C. Rear or front bump steer