ASE Auto Maintenance and Light Repair (G1) Free Sample Questions

12 free sample questions166 in the full practice test

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G1 Sample Questions

  1. Question 1

    Intermediate

    Engine Systems · Inspect and test radiator, heater core, pressure cap, and coolant recovery system; determine needed repairs; perform cooling system pressure and dye tests.

    A technician tests a radiator pressure cap using a handheld pressure pump and the correct neck adapter. The cap is stamped 16 psi (110 kPa). When pumped up to 16 psi, the pressure gauge needle immediately drops down to 10 psi within 5 seconds and holds there. What is the correct diagnosis and recommended action?

    Answer and explanation

    Correct answer: C

    A radiator cap must hold its rated pressure without dropping. Leaking down to 10 psi indicates a defective spring or seal, requiring cap replacement.

  2. Question 2

    Intermediate

    Engine Systems · Inspect and test radiator, heater core, pressure cap, and coolant recovery system; determine needed repairs; perform cooling system pressure and dye tests.

    A vehicle exhibits intermittent coolant loss, but a standard cooling system pressure test at shop ambient temperature reveals no visible exterior leaks. Which procedure should the technician follow to locate the leak source using fluorescent ultraviolet (UV) dye?

    Answer and explanation

    Correct answer: B

    Circulating UV dye with the thermostat open distributes it throughout the cooling passages; an ultraviolet lamp and tinted glasses reveal glowing dye at slow seepage points.

  3. Question 3

    Beginner

    Engine Systems · Inspect and test radiator, heater core, pressure cap, and coolant recovery system; determine needed repairs; perform cooling system pressure and dye tests.

    After an engine cools completely overnight, the technician notices that the upper radiator hose is completely collapsed and flattened. Which component malfunction is the most likely cause of this condition?

    Answer and explanation

    Correct answer: D

    As coolant cools and contracts, a stuck-closed vacuum relief valve in the radiator cap prevents coolant from returning from the reservoir, pulling a vacuum that collapses the hose.

  4. Question 4

    Beginner

    Engine Systems · Change engine oil and filter; reset oil life monitor.

    When installing a new spin-on engine oil filter, which procedure must the technician follow after applying a light film of clean engine oil to the new rubber gasket?

    Answer and explanation

    Correct answer: C

    Spin-on filters should be hand-tightened 3/4 to 1 turn (or per manufacturer spec) after gasket contact; overtightening with tools distorts the O-ring and causes leaks.

  5. Question 5

    Intermediate

    Engine Systems · Change engine oil and filter; reset oil life monitor.

    A technician completes an oil and filter change on a vehicle equipped with an electronic Oil Life Monitor (OLM).

    Technician A says that resetting the OLM triggers an optical sensor in the oil pan to analyze engine oil clarity and recalibrate the monitoring intervals.
    Technician B says that failing to reset the OLM causes the instrument cluster to continue decrementing oil life based on previous engine operating data, leading to a premature service alert.

    Who is right?

    Answer and explanation

    Correct answer: B

    Most OLMs use PCM operating algorithms (mileage, engine revolutions, temperatures) rather than optical sensors. Failing to reset leaves old tracking data active.

  6. Question 6

    Intermediate

    Automatic Transmission/Transaxle · Determine fluid type, level, and condition.

    When inspecting the automatic transmission fluid level on a modern vehicle that does not have an underhood dipstick, which prerequisite condition must be met before removing the fluid level check plug?

    flowchart TD A[Position Vehicle on Level Hoist] --> B[Connect Scan Tool to OBD-II Port] B --> C[Verify Transmission Fluid Temperature Window] C --> D{Temperature in Specified Range?} D -->|Yes| E[Remove Level Check Plug With Engine Running] D -->|No| F[Idle or Cool Vehicle to Reach Target Window] F --> C
    Answer and explanation

    Correct answer: C

    Checking dipstick-less transmissions requires the vehicle to be level and the fluid at a specific operating temperature window monitored via scan tool to ensure correct expansion.

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