ASE Practice Test (G1: Auto Maintenance & Light Repair) Flashcards

A customer complains that the vehicle's engine oil level was correct at the last oil change but is now 1.5 quarts low after 4,000 miles with no visible leaks. The technician should FIRST:

Answer: Check for blue smoke from the exhaust during acceleration and deceleration

Checking for blue smoke during acceleration (worn piston rings) or deceleration (worn valve stem seals) helps identify the consumption source before recommending repairs. Diagnosing the cause is essential before recommending any repair or service.

During a multi-point inspection, a technician finds the serpentine belt has cracks across the ribs at a rate of 4 or more per inch. The correct recommendation is:

Answer: Replace the belt immediately — it has reached end of service life

Most manufacturers specify that 4 or more transverse cracks per inch in the rib of a serpentine belt indicates the belt is at end of life and must be replaced. Belt dressing is not recommended as it can cause slipping and deterioration.

A vehicle's battery tests good with a load tester but the customer reports repeated slow cranking. The technician should next check:

Answer: Voltage drop across the battery cables and connections

Even a good battery can cause slow cranking if there is excessive resistance in the cable connections or terminals. Voltage drop testing across the positive and negative cables under cranking load will identify any resistance that is robbing the starter of available voltage.

The correct tire rotation pattern for a vehicle with four non-directional tires and NO full-size spare is:

Answer: Rearward cross (rear tires move straight forward, front tires cross to rear)

The rearward cross pattern (also called the modified X) is the most common rotation for RWD and 4WD/AWD vehicles with non-directional tires. The rear tires move straight forward, and the front tires cross to the opposite rear position. The forward cross is used for FWD vehicles.

A customer requests a coolant flush. The technician drains and refills the system but does not perform a complete flush. The MOST important step after refilling is:

Answer: Purge trapped air by running the engine with the heater on HIGH until the thermostat opens

After refilling a cooling system, trapped air pockets must be purged. Running the engine with the heater set to high heat and the temperature maxed allows the thermostat to open, circulating coolant through the entire system including the heater core and flushing out air. Failure to bleed air can cause overheating.

A customer's vehicle has a TPMS warning light that is solid (not flashing). This indicates:

Answer: One or more tires are significantly below the recommended inflation pressure

A solid TPMS warning light indicates that one or more tires are at least 25% below the vehicle manufacturer's recommended inflation pressure. A flashing TPMS light (typically for 60–90 seconds then solid) indicates a system malfunction such as a failed sensor or loss of sensor communication.