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ASE G1 Auto Maintenance and Light Repair practice questions

211 free questions with answers and explanations.

Practice test
  1. 151.During a pre-purchase inspection of a four-wheel-drive (4WD) vehicle, a technician observes that the front and rear driveshafts are rotating at different speeds while driving in a straight line on dry pavement in 4WD HIGH. This condition is NORMAL for which type of 4WD system?Manual Drive Train and Axles
  2. 152.A technician is diagnosing a complaint of excessive driveline vibration that intensifies with vehicle speed. Upon inspection, they notice that one of the driveshaft's universal joints (U-joints) has visible rust and appears stiff when articulated by hand. What is the MOST likely cause of the vibration?Manual Drive Train and Axles
  3. 153.A technician is inspecting a front-wheel-drive vehicle with a manual transaxle. The customer complains of a clicking or popping noise when turning sharply. Which of the following components is MOST likely the cause?Manual Drive Train and Axles
  4. 154.A technician is diagnosing a loud whining noise that increases in pitch with vehicle speed, regardless of whether the vehicle is accelerating or decelerating. The noise seems to originate from the rear axle. This symptom MOST strongly suggests a problem with the:Manual Drive Train and Axles
  5. 155.A technician is inspecting a vehicle's manual transmission that has a persistent leak. They have identified that the leak is coming from the output shaft area where it connects to the driveshaft. Which component is MOST likely responsible for preventing this leak?Manual Drive Train and Axles
  6. 156.A technician is diagnosing a complaint of a grinding noise when shifting into reverse in a vehicle equipped with a manual transmission. All forward gears engage smoothly without noise. Which of the following is the MOST likely cause?Manual Drive Train and Axles
  7. 157.A client complains that their manual transmission vehicle exhibits a burning smell and reduced acceleration, especially when climbing hills. The engine RPM increases significantly without a corresponding increase in vehicle speed. Which of the following is the MOST likely cause?Manual Drive Train and Axles
  8. 158.A technician is performing a road test on a vehicle with a manual transmission. They notice that the vehicle shudders or vibrates violently when attempting to accelerate from a stop, particularly when the engine is cold. Once moving, the vibration usually subsides. Which of the following is the MOST likely cause?Manual Drive Train and Axles
  9. 159.A vehicle with a manual transmission experiences a sudden loss of drive, but the engine runs normally and the clutch pedal feels correct. When the transmission is shifted into any gear, the shift lever moves freely, but no power is transmitted to the wheels. This condition MOST likely indicates a failure of which component?Manual Drive Train and Axles
  10. 160.A vehicle with a manual transmission exhibits a rumbling noise that is present only when the clutch pedal is depressed. The noise goes away when the pedal is released. Which of the following components is MOST likely causing this noise?Manual Drive Train and Axles
  11. 161.A technician is inspecting a vehicle with a complaint of a clunking noise from the rear when accelerating from a stop or shifting gears. The noise is more prominent when towing. Upon inspection, the driveshaft U-joints appear to have excessive play. What is the MOST appropriate next action?Manual Drive Train and Axles
  12. 162.A technician is performing a pre-purchase inspection on a four-wheel-drive (4WD) vehicle. They select '4HI' (four-wheel drive high range) on the transfer case selector. Which of the following statements BEST describes the typical operation of a part-time 4WD system in this mode?Manual Drive Train and Axles
  13. 163.A client complains that their vehicle with a manual transmission feels sluggish and the engine RPMs rise significantly without a corresponding increase in vehicle speed, especially when accelerating uphill. The clutch pedal free play is within specification. Which of the following is the MOST likely cause?Manual Drive Train and Axles
  14. 164.A technician is performing a differential backlash measurement. The specification is 0.005-0.008 inches. The technician measures 0.015 inches. What is the MOST appropriate corrective action?Manual Drive Train and Axles
  15. 165.A vehicle with a manual transmission exhibits difficulty shifting into any gear when the engine is running, but shifts smoothly when the engine is off. The clutch pedal feels normal and has proper free play. Which of the following is the MOST likely cause?Manual Drive Train and Axles
  16. 166.A technician is diagnosing a loud clunking noise coming from the rear of a rear-wheel-drive vehicle, especially when shifting gears or accelerating from a stop. Upon inspection, they find significant rotational play in the driveshaft at the differential input flange. Which component is MOST likely causing this noise?Manual Drive Train and Axles
  17. 167.A client complains that their vehicle's interior dome light does not turn on when any door is opened, but it *does* turn on when the dome light switch is manually activated. What is the MOST likely cause?Electrical/Electronic Systems
  18. 168.A vehicle's power windows operate slowly, and the radio occasionally cuts out when the windows are operated. The battery and charging system test within specifications. What is the MOST likely cause of these symptoms?Electrical/Electronic Systems
  19. 169.A technician is performing a parasitic draw test. With the ignition off and all accessories off, the multimeter reads 500 mA. What is the MOST appropriate next step in diagnosing this excessive draw?Electrical/Electronic Systems
  20. 170.A vehicle's power windows operate slowly, and the radio occasionally cuts out when the windows are used. The battery tests good, and the charging system maintains 14.2 volts. What is the MOST likely cause of these symptoms?Electrical/Electronic Systems
  21. 171.A technician is diagnosing a vehicle where the engine cranks normally but fails to start. The fuel pump can be heard operating when the ignition is turned to the 'ON' position, and there is spark at the spark plugs. The 'CHECK ENGINE' light is not illuminated. What is the most likely cause of this no-start condition?Electrical/Electronic Systems
  22. 172.A technician is diagnosing a vehicle with a 'CHECK ENGINE' light illuminated. They connect a scan tool and retrieve a diagnostic trouble code (DTC) P0301, indicating a misfire on cylinder 1. What is the NEXT logical step in diagnosing this issue?Electrical/Electronic Systems
  23. 173.A vehicle's left turn signal blinks rapidly, while the right turn signal blinks at a normal rate. All bulbs on the left side (front and rear) are confirmed to be illuminating. What is the MOST likely cause?Electrical/Electronic Systems
  24. 174.A vehicle owner reports that their dashboard 'CHECK GAUGE' warning light illuminates, but all individual gauges (fuel, temperature, oil pressure, voltmeter) appear to be reading correctly. What is the most likely cause of this discrepancy?Electrical/Electronic Systems
  25. 175.A vehicle's dashboard warning light for the anti-lock braking system (ABS) illuminates intermittently. A technician connects a scan tool and retrieves Diagnostic Trouble Code (DTC) C0035. What does this code most likely indicate?Electrical/Electronic Systems
  26. 176.A vehicle's windshield wipers operate only on the 'HIGH' speed setting, but not on 'LOW' or 'INTERMITTENT'. The washer fluid pump also functions correctly. What is the MOST likely cause?Electrical/Electronic Systems
  27. 177.A vehicle's horn is inoperative. When the horn button is pressed, no sound is heard, and a test light connected to the horn's power wire illuminates brightly. What is the MOST likely cause?Electrical/Electronic Systems
  28. 178.A vehicle's windshield wipers operate only on the 'HIGH' speed setting, but not on 'LOW' or 'INTERMITTENT'. The washer fluid pump works correctly. What is the MOST likely cause?Electrical/Electronic Systems
  29. 179.A vehicle's power seat adjusts forward and backward, but will not move up or down. All other power accessories work correctly. What is the MOST likely cause?Electrical/Electronic Systems
  30. 180.A vehicle's power windows operate normally, but the power door locks are inoperative on all doors. A technician checks the fuse box and finds no blown fuses related to the door lock system. What is the most likely cause?Electrical/Electronic Systems
  31. 181.A client complains that their vehicle's interior dome light does not turn on when any door is opened, but it works when manually switched to the 'ON' position. All other interior lights function correctly. Which of the following is the MOST likely cause?Electrical/Electronic Systems
  32. 182.A technician is checking the charging system. With the engine running, a voltmeter shows 14.5 volts across the battery terminals. When the headlights, blower motor, and rear defroster are turned on, the voltage drops to 13.8 volts. What does this indicate?Electrical/Electronic Systems
  33. 183.A vehicle's horn is inoperative. When the horn button is pressed, no sound is heard, and a test light connected to the horn's power wire at the horn itself illuminates brightly. A voltmeter connected between the horn's ground terminal and a known good chassis ground reads 12 volts when the horn button is pressed. What is the MOST likely cause?Electrical/Electronic Systems
  34. 184.A vehicle's dashboard warning light for the anti-lock braking system (ABS) illuminates intermittently. A technician connects a scan tool and retrieves Diagnostic Trouble Code (DTC) C0035, indicating a 'Left Front Wheel Speed Sensor Circuit Malfunction'. Which of the following is the MOST likely cause?Electrical/Electronic Systems
  35. 185.A vehicle experiences a complete loss of all electrical power immediately after a battery replacement. The new battery was installed correctly, and its voltage measures 12.6V. What is the MOST likely cause?Electrical/Electronic Systems
  36. 186.A vehicle owner reports that their dashboard 'BRAKE' warning light remains illuminated even after releasing the parking brake and checking the brake fluid level, which is full. What is the MOST likely cause?Electrical/Electronic Systems
  37. 187.A technician is diagnosing a vehicle with a 'CHECK ENGINE' light illuminated. They connect a scan tool and retrieve Diagnostic Trouble Code (DTC) P0420, indicating 'Catalyst System Efficiency Below Threshold (Bank 1)'. Which of the following is the MOST appropriate initial diagnostic step?Electrical/Electronic Systems
  38. 188.A vehicle's headlights are dim, and the engine cranks slowly but eventually starts. After starting, the charging system indicator light remains illuminated. A voltmeter connected across the battery terminals while the engine is running reads 12.2 volts. What is the MOST likely problem?Electrical/Electronic Systems
  39. 189.A technician is performing a parasitic draw test. With the ignition off and all accessories off, the multimeter shows a current draw of 250 milliamperes (mA) after waiting for the vehicle's modules to 'go to sleep'. What should the technician do next?Electrical/Electronic Systems
  40. 190.A technician is diagnosing a vehicle with a completely discharged battery. After charging the battery, they perform a battery load test and the battery voltage drops to 9.0 volts while cranking, and the CCA rating is significantly below specifications. What is the MOST likely cause of this condition?Electrical/Electronic Systems
  41. 191.A vehicle's instrument cluster displays a continuous 'CHECK GAUGE' warning light, but all individual gauges (fuel, temperature, oil pressure) appear to be functioning correctly. What is the MOST likely cause?Electrical/Electronic Systems
  42. 192.A vehicle's high-beam headlights are inoperative, but the low-beam headlights function correctly. The high-beam indicator light on the dashboard also does not illuminate when activated. What is the MOST likely cause?Electrical/Electronic Systems
  43. 193.A technician is performing a voltage drop test on the positive side of a starter motor circuit. They connect the positive lead of a voltmeter to the battery positive terminal and the negative lead to the starter motor's battery cable terminal. During cranking, the voltmeter reads 0.8 volts. What does this reading indicate?Electrical/Electronic Systems
  44. 194.A technician is performing a parasitic draw test. With the ignition off and all accessories off, they connect an ammeter in series with the negative battery cable. After allowing the vehicle to 'go to sleep' for 30 minutes, the ammeter reads 150 milliamperes (mA). What does this reading indicate?Electrical/Electronic Systems
  45. 195.A vehicle's engine cranks slowly but does not start. The headlights dim significantly when attempting to crank the engine. A fully charged battery tests good. Which of the following is the MOST likely cause?Electrical/Electronic Systems
  46. 196.A technician is performing a voltage drop test on the negative side of a starter motor circuit. With the engine cranking, the voltmeter is connected between the battery negative post and the engine block. A reading of 1.5 volts is observed. What does this indicate?Electrical/Electronic Systems
  47. 197.A vehicle's power window on the driver's side operates normally, but the passenger side power window does not respond to its own switch or the master switch on the driver's door. All other power accessories are working correctly. Which of the following is the MOST likely cause?Electrical/Electronic Systems
  48. 198.A technician is performing a routine tire inspection. Which of the following conditions indicates that a tire needs to be replaced due to excessive wear?Maintenance and Light Repair
  49. 199.A technician observes that a vehicle's front tires are worn heavily on both the inner and outer edges, with the center tread remaining relatively good. What is the MOST likely cause of this tire wear pattern?Suspension and Steering
  50. 200.A technician is performing a pre-alignment inspection. They notice that the vehicle's rear axle is bent, causing the rear wheels to point inward at the top. What alignment angle is primarily affected?Suspension and Steering