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ASE G1 Auto Maintenance and Light Repair practice questions

211 free questions with answers and explanations.

Practice test
  1. 51.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
  2. 52.A vehicle arrives at the shop with a complaint of a rough idle and a 'Check Engine' light illuminated. Upon scanning, Diagnostic Trouble Code (DTC) P0301 (Cylinder 1 Misfire Detected) is found. Which of the following is NOT a common cause of a P0301 code?Engine Systems
  3. 53.A technician is performing a road test and observes that the steering wheel is off-center when driving straight, but the vehicle tracks straight without pulling. What is the MOST likely cause?Suspension and Steering
  4. 54.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
  5. 55.A technician is inspecting a vehicle's front suspension and observes that the upper control arm bushings are severely cracked and deteriorated. Which of the following symptoms is MOST likely to be reported by the customer due to this condition?Suspension and Steering
  6. 56.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
  7. 57.A technician is diagnosing a vehicle that cranks but does not start. They confirm that there is adequate fuel pressure at the fuel rail and spark at the spark plugs. Which of the following components should the technician investigate next?Engine Systems
  8. 58.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
  9. 59.A technician is inspecting a vehicle's brake system. The brake pedal feels spongy and goes almost to the floor before the brakes engage. Which of the following is the MOST likely cause?Brakes
  10. 60.A vehicle's AC system has been evacuated and is ready for recharging. The manufacturer specifies a charge of 1.5 lbs (0.68 kg) of R-134a. If the technician is using a charging station that measures in ounces, how many ounces of refrigerant should be added?Heating and Air Conditioning (HVAC)
  11. 61.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
  12. 62.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
  13. 63.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)
  14. 64.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)
  15. 65.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
  16. 66.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
  17. 67.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)
  18. 68.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
  19. 69.A client complains that their vehicle pulls to one side when the brakes are applied. Which of the following is the MOST likely cause?Maintenance and Light Repair
  20. 70.A technician is performing a pre-alignment inspection on a vehicle. They notice that the tires are worn excessively on both the inner and outer shoulders, but the center of the tread is relatively unworn. Which of the following conditions is the MOST likely cause of this tire wear pattern?Suspension and Steering
  21. 71.A technician is evacuating an R-1234yf system. What color hose is universally designated for the low-side service port connection on manifold gauges for this refrigerant type?Heating and Air Conditioning (HVAC)
  22. 72.A technician is inspecting a vehicle's brake system. The customer reports a noticeable increase in stopping distance and a harder-than-normal brake pedal feel, especially during sudden stops. Upon inspection, the technician finds no external leaks in the hydraulic system and the brake pads and rotors are within specification. Which of the following is the MOST likely cause of these symptoms?Brakes
  23. 73.A technician observes that a vehicle's serpentine belt has numerous small cracks on its ribbed side and is showing signs of glazing. What is the most appropriate action?Engine Systems
  24. 74.A vehicle experiences a sudden, complete loss of braking effectiveness while driving. The brake pedal goes straight to the floor with no resistance. There is a strong smell of burning fluid. What is the MOST likely cause of this catastrophic failure?Brakes
  25. 75.A vehicle with a solid rear axle experiences excessive body roll during cornering. All suspension components appear to be in good condition. What is the MOST likely contributing factor to this condition?Suspension and Steering
  26. 76.A customer reports that their vehicle's brakes feel 'grabby' and lock up easily, especially at low speeds. A technician inspects the rear drum brakes and finds that the self-adjusters are seized in an over-adjusted position. Which of the following is the MOST appropriate corrective action?Brakes
  27. 77.Which type of refrigerant is commonly identified by its green connections or service ports on an automotive AC system?Heating and Air Conditioning (HVAC)
  28. 78.A technician is performing a steering system inspection. They observe that there is excessive free play in the steering wheel, but no looseness is found in the tie rod ends, ball joints, or wheel bearings. The vehicle has a conventional recirculating ball steering gear. What is the MOST likely cause of this excessive steering wheel free play?Suspension and Steering
  29. 79.A customer reports that their vehicle feels like it is constantly dragging and has decreased fuel economy. The front wheels generate excessive heat after driving, and a burning smell is present. Upon inspection, a technician finds that both front brake calipers are partially seized. What is the MOST likely cause of this issue?Brakes
  30. 80.A technician is diagnosing a vehicle that exhibits a strong odor of gasoline, particularly after the engine has been running. Upon inspection, the technician notices a wet spot on the ground directly below the fuel tank. Which of the following is the most likely cause?Engine Systems
  31. 81.A vehicle experiences a sudden, significant loss of engine power, accompanied by a loud 'popping' sound from the exhaust and excessive smoke. Which of the following is the most likely cause?Engine Systems
  32. 82.A technician is performing a pre-purchase inspection. The vehicle has an ABS system, and the ABS warning light illuminates briefly during startup self-test and then turns off. What does this behavior indicate?Brakes
  33. 83.A technician is performing a pre-alignment inspection. They notice that when the vehicle is pushed down and released, it continues to bounce excessively multiple times before settling. Which of the following components is most likely worn or failing?Suspension and Steering
  34. 84.A vehicle's serpentine belt is squealing loudly, especially on cold starts and when turning the steering wheel. Technician A says this could be caused by a worn or stretched belt. Technician B says this could be caused by a failing power steering pump. Who is correct?Engine Systems
  35. 85.A technician is inspecting the steering system of a light truck. They note that the steering gearbox has significant play when the steering wheel is turned back and forth slightly, but the pitman arm and idler arm connections are tight. What is the most likely cause of this steering play?Suspension and Steering
  36. 86.A technician is inspecting a vehicle's serpentine belt. Which of the following conditions indicates the belt should be replaced?Maintenance and Light Repair
  37. 87.Which of the following is the PRIMARY purpose of the receiver/drier in an automotive air conditioning system?Heating and Air Conditioning (HVAC)
  38. 88.A vehicle's engine is experiencing consistent overheating, even after replacing the thermostat and ensuring the coolant level is correct. The upper radiator hose is hot and firm, but the lower radiator hose remains cool. What is the most probable cause of this condition?Engine Systems
  39. 89.A vehicle's engine develops a distinct, rhythmic 'tapping' or 'clicking' noise that is most noticeable when the engine is cold and tends to quiet down as the engine warms up. Which of the following is the MOST likely cause?Engine Systems
  40. 90.A technician is diagnosing an Antilock Brake System (ABS) warning light on the dashboard. After scanning the vehicle's computer, a Diagnostic Trouble Code (DTC) C0200, indicating a 'Left Front Wheel Speed Sensor Circuit Malfunction,' is retrieved. Which of the following is the MOST appropriate initial diagnostic step?Brakes
  41. 91.A client reports a 'grinding' noise when applying the brakes. During inspection, the technician notices deep scoring on the brake rotors and very thin brake pads. What is the MOST likely cause of the grinding noise?Maintenance and Light Repair
  42. 92.Which component is responsible for converting high-pressure refrigerant vapor into a high-pressure liquid by dissipating heat to the ambient air?Heating and Air Conditioning (HVAC)
  43. 93.A technician is diagnosing a vehicle that exhibits a strong sulfur-like odor from the exhaust, particularly after hard acceleration. Which of the following is the most likely cause?Engine Systems
  44. 94.A technician is performing a routine oil change on a vehicle with a spin-on type oil filter. After installing the new filter, what is the MOST important step before starting the engine?Maintenance and Light Repair
  45. 95.Which safety precaution is MOST important when working with refrigerants, particularly during recovery or recharging procedures?Heating and Air Conditioning (HVAC)
  46. 96.A vehicle's air conditioning system blows cold air when driving at highway speeds but only warm air at idle. Which of the following is the MOST likely cause?Heating and Air Conditioning (HVAC)
  47. 97.A customer complains of a 'clunking' noise coming from the rear of their vehicle when going over bumps. A technician inspects the rear suspension and finds no obvious damage to the springs or shocks. Which of these components is MOST likely to be the source of the noise?Suspension and Steering
  48. 98.A technician is preparing to recover refrigerant from an R-134a automotive AC system. According to EPA regulations, what is the MINIMUM vacuum level (in inches of mercury, Hg) that must be achieved before recharging a system that has been opened for service?Heating and Air Conditioning (HVAC)
  49. 99.Which of the following wheel alignment angles primarily influences tire wear on the inner or outer edge of the tread?Suspension and Steering
  50. 100.A customer complains of a rhythmic 'thump-thump-thump' noise that increases in frequency with vehicle speed and is most noticeable at low speeds. The technician inspects the tires and finds a flat spot on one of the front tires. Which of the following is the MOST likely cause of this condition?Suspension and Steering