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ASE G1 Auto Maintenance and Light Repair practice questions

211 free questions with answers and explanations.

Practice test
  1. 1.A customer reports that their vehicle's automatic transmission occasionally fails to shift into overdrive (the highest gear), causing higher than normal engine RPM at highway speeds. All other shifts seem normal, and there are no dashboard warning lights. What is the most likely cause?Automatic Transmission/Transaxle
  2. 2.Which of the following is the primary purpose of the transmission range sensor (TRS), also known as the neutral safety switch, in an automatic transmission system?Automatic Transmission/Transaxle
  3. 3.A customer complains that their automatic transmission sometimes 'hangs' in a gear, staying in a lower gear longer than expected before eventually shifting. This happens intermittently. A scan tool shows no active DTCs. What is the most likely cause?Automatic Transmission/Transaxle
  4. 4.A technician is performing a pre-purchase inspection on a vehicle. During the inspection, they notice that the automatic transmission fluid appears dark brown and has a strong, burnt odor. All fluid levels are correct. What does this condition most likely indicate?Automatic Transmission/Transaxle
  5. 5.A vehicle with an automatic transmission experiences a condition where it will not engage any forward gears, but Reverse engages and operates normally. What is the most likely cause of this specific symptom?Automatic Transmission/Transaxle
  6. 6.A technician is performing a routine fluid level check on an automatic transmission. The vehicle has been driven for at least 15 minutes and is currently idling in Park on a level surface. The technician notes the fluid level is significantly below the 'FULL' mark on the dipstick. What is the most appropriate next step?Automatic Transmission/Transaxle
  7. 7.A technician is performing a diagnostic on an automatic transmission that intermittently experiences delayed engagement into Drive or Reverse after sitting for a period, particularly when cold. Once engaged, it shifts normally. The fluid level is correct and clean. What is the most likely cause?Automatic Transmission/Transaxle
  8. 8.A customer complains that their vehicle with an automatic transmission hesitates and slips when shifting from first to second gear, especially when cold. The fluid level is correct, and the fluid appears clean and reddish-brown. What is the most likely cause of this symptom?Automatic Transmission/Transaxle
  9. 9.A customer reports that their automatic transmission sometimes 'hangs' in a gear, staying at high RPM for too long before eventually shifting harshly. This occurs intermittently. The fluid level and condition are good, and no DTCs are present. Which of the following is the most likely cause?Automatic Transmission/Transaxle
  10. 10.A vehicle with an automatic transmission has a complaint of a buzzing or whining noise coming from the transmission area, particularly noticeable at idle in Park or Neutral. The noise changes pitch with engine RPM. What is the most likely source of this noise?Automatic Transmission/Transaxle
  11. 11.A customer reports that their vehicle's automatic transmission sometimes 'clunks' into gear when shifting from Park to Reverse or Drive, but shifts smoothly once moving. What is the most likely cause of this complaint?Automatic Transmission/Transaxle
  12. 12.A technician is performing a diagnostic check on a vehicle with an automatic transmission that exhibits a delayed engagement into Drive (D) when first started in the morning, but then operates normally for the rest of the day. The fluid level is correct and appears clean. What is the most likely cause?Automatic Transmission/Transaxle
  13. 13.A customer reports that their vehicle's automatic transmission shifts normally for the first 10-15 minutes of driving, but then begins to experience delayed and harsh shifts as the vehicle warms up. The fluid level is correct and appears clean. What is the most likely cause?Automatic Transmission/Transaxle
  14. 14.An automatic transmission is exhibiting erratic shifting patterns, sometimes shifting too early, sometimes too late, and occasionally feeling harsh. The fluid level and condition are good. A scan tool reveals no Diagnostic Trouble Codes (DTCs). Which of the following external controls is most likely contributing to these symptoms?Automatic Transmission/Transaxle
  15. 15.A technician is inspecting a vehicle that makes a clunking noise when the driver shifts from Park to Reverse or Park to Drive. The noise is more pronounced when the vehicle is on an incline. The transmission fluid level and condition are normal, and there are no signs of external leaks. What is the most likely cause of this noise?Automatic Transmission/Transaxle
  16. 16.A vehicle with an automatic transmission experiences harsh, delayed shifts into gear and between gears. The technician checks the fluid level, which is correct, but notes the fluid is dark brown and has a burnt smell. What does this fluid condition most likely indicate?Automatic Transmission/Transaxle
  17. 17.A technician is diagnosing an automatic transmission that shifts harshly and inconsistently, especially under heavy acceleration. The fluid level is correct and appears clean. A scan tool reveals no trouble codes. Which of the following components should the technician investigate next?Automatic Transmission/Transaxle
  18. 18.A technician is performing a diagnostic check on an automatic transmission system. The customer reports a noticeable delay in engagement when shifting from Neutral to Drive, and sometimes a harsh engagement. The fluid level is correct, but the technician notes the main line pressure is slightly lower than specifications at idle. What is the most probable cause?Automatic Transmission/Transaxle
  19. 19.A vehicle with an automatic transmission exhibits a shudder or vibration during acceleration, particularly when the torque converter is commanded to lock up. This symptom is most noticeable between 35-50 mph. What is the most probable cause?Automatic Transmission/Transaxle
  20. 20.A technician is performing a multi-point inspection and observes that the engine oil on the dipstick is milky or foamy. What does this condition most likely indicate?Engine Systems
  21. 21.A customer complains of excessive brake dust on their front wheels after installing new brake pads and rotors. The technician confirms the brake dust is black and sticky. Which of the following is the MOST likely cause?Brakes
  22. 22.A vehicle with a solid rear axle is undergoing a pre-alignment inspection. The technician measures the rear camber and finds it to be outside the manufacturer's specifications. What is the most common cause of an incorrect rear camber angle on a vehicle with a non-adjustable solid rear axle?Suspension and Steering
  23. 23.During an oil change, a technician notices that the engine oil is milky and discolored, resembling a 'milkshake' consistency. The vehicle's coolant level is also noticeably low. What is the most likely cause of these observations?Engine Systems
  24. 24.A vehicle owner reports that their engine frequently overheats when idling in traffic or driving at low speeds, but the temperature returns to normal once the vehicle is moving at highway speeds. Which of the following is the MOST likely cause?Engine Systems
  25. 25.A technician is diagnosing a vehicle that cranks but does not start. The spark plugs are wet with fuel, and a strong odor of gasoline is present. When a spark tester is used, there is no spark from any of the spark plug wires. What is the most likely issue?Engine Systems
  26. 26.Which of the following components is MOST likely to cause a vehicle to pull to one side when the brakes are applied, even though the brake pads on both sides appear to have similar wear?Brakes
  27. 27.A technician is diagnosing a vehicle with a consistent misfire on multiple cylinders and black, sooty exhaust smoke. The 'Check Engine' light is on, and scan tool data shows very high negative short-term and long-term fuel trim values. What is the most likely cause?Engine Systems
  28. 28.A customer complains of a high-pitched squealing noise coming from the front brakes during light application. The sound disappears when the brakes are applied firmly. A technician inspects the brakes and finds the pads have approximately 50% lining remaining and the rotors are in good condition. What is the MOST likely cause of this noise?Brakes
  29. 29.A technician observes that the parking brake lever on a vehicle pulls up excessively high, yet the parking brake barely holds the vehicle. What is the MOST likely cause?Brakes
  30. 30.A customer complains that their vehicle pulls to the left when driving, and the steering wheel is noticeably off-center to the right. A pre-alignment inspection reveals no worn steering or suspension components. What is the most likely cause of these symptoms?Suspension and Steering
  31. 31.A technician is performing a brake inspection on a vehicle equipped with drum brakes. They notice that the brake linings are severely worn, and the brake drum has deep grooves. The customer reports a grinding noise and reduced braking effectiveness. What is the MOST appropriate next step?Brakes
  32. 32.A technician is troubleshooting an automotive AC system where the blower motor operates at all speeds except the highest speed. All other blower speeds work correctly. Which component is MOST likely at fault?Heating and Air Conditioning (HVAC)
  33. 33.A technician observes excessive play when checking a vehicle's steering linkage. Which component is LEAST likely to be the cause of this play?Maintenance and Light Repair
  34. 34.A vehicle owner complains that their engine takes an excessively long time to warm up, and the heater does not blow hot air consistently. Which of the following is the most likely cause?Engine Systems
  35. 35.A technician is performing a routine maintenance check on a vehicle and observes that the serpentine belt is glazed and cracked. What is the most appropriate action the technician should recommend?Engine Systems
  36. 36.A technician is performing a routine oil change. After draining the oil, they notice a significant amount of shiny, non-magnetic metallic particles in the old oil. What does this MOST likely indicate?Engine Systems
  37. 37.A vehicle's dashboard coolant temperature gauge consistently reads in the 'cold' range, even after the engine has been running for an extended period. The heater in the cabin also produces very little heat. What is the most likely cause?Engine Systems
  38. 38.During a routine inspection, a technician notes that the AC compressor clutch is engaging and disengaging rapidly (cycling on and off frequently). All other components appear to be functioning correctly. What is the MOST likely cause of this rapid cycling?Heating and Air Conditioning (HVAC)
  39. 39.A technician is performing a pre-alignment inspection and notes that the vehicle's left front tire shows excessive wear on both the inner and outer shoulders, while the center tread is significantly less worn. Which of the following alignment conditions is the most likely cause of this wear pattern?Suspension and Steering
  40. 40.A vehicle owner reports that their vehicle feels 'loose' or 'wandering' at highway speeds, requiring constant steering corrections to maintain a straight path. They also mention that the steering wheel seems to have excessive free play before the wheels respond. Which of the following components is most likely causing these symptoms?Suspension and Steering
  41. 41.A vehicle's HVAC system is operating, but the air coming from the vents is not as warm as expected, even with the temperature control set to maximum heat. The engine coolant temperature is at its normal operating level. Which of the following is the MOST likely cause?Heating and Air Conditioning (HVAC)
  42. 42.A vehicle owner complains that their engine runs rough, hesitates under acceleration, and has poor fuel economy. A diagnostic scan reveals a P0171 trouble code, indicating 'System Too Lean (Bank 1)'. Which of the following is the most likely cause?Engine Systems
  43. 43.A technician is performing a pre-purchase inspection on a used vehicle. They notice excessive play in the steering wheel and a clunking noise when turning the wheel at low speeds. Which of the following components is MOST likely worn?Engine Systems
  44. 44.A technician is performing a vehicle inspection and notices that the exhaust system has a small hole near a weld. What is the most immediate concern resulting from this exhaust leak?Engine Systems
  45. 45.A technician is replacing the front disc brake pads on a vehicle. After installing the new pads and compressing the caliper pistons, they find that the brake pedal is low and requires several pumps to become firm. There are no visible leaks. What is the MOST likely reason for the low pedal?Brakes
  46. 46.A technician is diagnosing an automotive HVAC system that produces warm air from the vents, despite the compressor engaging and the system having a full refrigerant charge. The high-side pressure is unusually low, and the low-side pressure is unusually high. Which of the following is the MOST likely cause?Heating and Air Conditioning (HVAC)
  47. 47.A technician is performing a rear suspension inspection on a vehicle with a solid axle. They observe that the leaf springs appear 'fanned out' and some leaves are separated or broken. The vehicle's rear ride height is noticeably lower than specifications. What is the most likely consequence of this condition?Suspension and Steering
  48. 48.A technician is performing a diagnostic on a vehicle's HVAC system that exhibits intermittent cooling. The customer reports that the AC works fine for a while, then stops, and sometimes starts working again later. The technician observes that the compressor clutch cycles on and off rapidly when the system is not cooling. Which of the following is the MOST probable cause?Heating and Air Conditioning (HVAC)
  49. 49.A customer complains that their vehicle's heater only blows cool air, even after the engine has reached operating temperature. The coolant level is full, and the engine temperature gauge reads normal. What is the MOST likely cause of this issue?Heating and Air Conditioning (HVAC)
  50. 50.A vehicle exhibits a 'shimmy' or vibration in the steering wheel that is most noticeable at highway speeds (50-70 mph). The MOST likely cause is:Suspension and Steering