ASE G1 Maintenance & Lt. Repair Practice Test
16. The battery is overheating, and the headlights shine brighter when the engine is revved to 2500 RPM. Which of the following could be the cause?
- A. A high-capacity battery.
- B. A faulty voltage regulator.
- C. A loose accessory belt.
- D. Halogen headlight bulbs.
Answer A is wrong. The vehicle's battery is primarily used for starting the engine. The alternator supplies power to the vehicle's electrical system whenever the engine runs.
Answer B is correct. The alternator is at the heart of the charging system. If the alternator outputs excessive or high charging voltage, check voltage regulation. High charging system output affects the headlights and sensitive electronic circuits like instrument clusters and computers, which can quickly overheat and burn from excessive voltage.
Answer C is wrong. A loose accessory belt will squeal when the engine is revved.
Answer D is wrong. Halogen bulbs are similar to incandescent bulbs, except they have an inert or halogen gas added. Use bulbs of the same intensity on both sides of the vehicle. Because these bulbs contain halogen, it's important not to touch the glass portion of the bulb with your fingertips.
17. Which of the following is LEAST likely to cause a vehicle with a power rack and pinion steering system to bind while turning corners?
- A. Bad strut mount bearings.
- B. Worn tie rod ends.
- C. A faulty rack and pinion gear.
- D. The lower ball joint.
Answer A is wrong. Strut mount bearings can lose vital lubrication and bind while cornering.
Answer B is correct. Worn tie rods make a popping noise, result in premature tire wear, and cause loose steering. The ball and stud wear resulting in slack and looseness affecting its performance.
Answer C is wrong. A worn power steering rack gear can bind, causing difficulty while cornering.
Answer D is wrong. A faulty or dry ball joint will result in a bind while turning.
18. While bleeding air from a hydraulic power steering system, the technician should perform each of the following steps, EXCEPT:
- A. Raise both front tires in the air.
- B. Turn the steering wheel from stop to stop to bleed air from the system.
- C. Hold the wheel for at least 10 seconds at each steering stop.
- D. Flush the system with the manufacturer's recommended power steering fluid.
Answer A is wrong. To bleed the system, raise the wheels off the ground and fill the reservoir with fresh power steering fluid. Raising the tires prevents flat spots.
Answer B is wrong. Introduce air into the system, and the system's pressure and performance suffer. Air is compressible and absorbs much of the system's turning force. Turn the wheel left and right from stop to stop to bleed air from the system.
Answer C is correct. Don't hold the wheel against the steering stops for more than five seconds. Doing so increases system pressure so high it can rupture hoses and damage system components.
Answer D is wrong. Use the recommended power steering fluid. Before returning the vehicle to service, no air bubbles, foam, or leaks are allowed.
19. A red-colored fluid is leaking between the transmission and the engine. Which of the following is correct?
- A. This fluid is the result of a leaking rear main seal.
- B. This fluid is the result of a leaking transmission pump seal.
- C. This fluid is the result of a leaking camshaft seal.
- D. This fluid is the result of a leaking crankshaft seal.
Answer A is wrong. Rear main seal leaks are common, so if the color of the fluid is brown, it's most likely engine oil leaking past the rear main seal. The transmission fluid is dyed red, indicating the fluid is leaking from the transmission pump seal, not the engine's rear main seal.
Answer B is correct. A leaking oil pump seal results in automatic transmission fluid leaking between the engine and transmission bell housing. Transmission fluid is red, and oil is tan or brown colored.
Answer C is wrong. The camshaft seal contains engine oil and is at the front of the engine.
Answer D is wrong. The crankshaft seal contains engine oil and is at the front of the engine. Always check the transmission fluid's color because ATF can turn brown colored (and look like engine oil) from heat and oxidation.
20. The electrical symbol shown above is a:
- A. Splice.
- B. Variable Resistor.
- C. Fuse.
- D. Diode.
Answer A is wrong. Electrical symbols represent different components in an electrical schematic diagram.
Answer B is correct. The electrical symbol in the image is a variable resistor. Electrical symbols represent different components in an electrical schematic diagram.
Answer C is wrong. Electrical symbols are used in automotive block and wiring diagrams.
Answer D is wrong. Click the "Read more..." button for more symbols found in automotive electrical schematics.