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The ASE G1 exam has 65 questions and runs 1 hour 30 minutes.
These 10 free ASE G1 questions are organized by exam domain, so you can see how each part of the ASE G1 Auto Maintenance and Light Repair blueprint is tested. Reveal the answer and explanation under each question.
Immediately after refueling, an engine cranks longer than normal and runs rough for about 20 seconds. Scan data shows vapor flow into the intake while the purge valve is commanded closed. Which fault is indicated?
Correct answer: A - The purge valve is stuck open
Immediately after a coolant drain and refill, the temperature gauge swings, cabin heat alternates between hot and cold, and gurgling is heard behind the instrument panel. The cold coolant level drops after the engine cools, and no external leak is found. Which condition best explains the complete pattern?
Correct answer: C - Air is trapped in the cooling system
A manual transmission shifts easily with the engine off but grinds when selecting first or reverse with the engine running. The clutch pedal feels spongy, improves when pumped, and the reservoir is low. Which action addresses the most likely cause?
Correct answer: B - Repair the hydraulic leak and bleed the system
A sedan pulls to the right on a level road. Tire pressures are equal, no brake drag is present, and rear thrust angle is 0.00 degrees. Front readings are: left camber +0.2 degrees, right camber +0.9 degrees, left caster +4.5 degrees, right caster +4.5 degrees, with toe within specification. Which finding best accounts for the pull?
Correct answer: C - More positive camber on the right
While mounting a passenger-vehicle tire, both beads remain unseated at 40 psi (275 kPa). The tire and rim sizes match. What is the safest next step?
Correct answer: A - Deflate, relubricate, reposition, and inspect the assembly
The right-front brake drags after several applications. The caliper slides move freely. With the pedal released, residual pressure is present at the caliper bleeder but not on the chassis side of the flexible hose; opening the bleeder releases the wheel. Which diagnosis best fits these findings?
Correct answer: D - An internally restricted flexible hose
During a vacuum-booster functional test, the reserve is depleted with the engine off. The pedal is held under steady pressure while the engine is started, and the pedal drops slightly. Technician A says the booster is operating normally. Technician B says this result proves an assist failure and requires removing the vehicle from service. Who is correct?
Correct answer: A - Technician A only
A vehicle cranks slowly with a known-good, fully charged battery. Starter current is lower than specification. During cranking, positive-side voltage drop is 0.82 V with a 0.50 V maximum, while ground-side drop is 0.09 V with a 0.20 V maximum. What should be serviced first?
Correct answer: B - Excessive resistance in the positive cable path
A fully charged 600-CCA battery is tested at 40 degrees F. The traditional load test applies one-half of the CCA rating for 15 seconds, and the minimum acceptable voltage at 40 degrees F is 9.3 V. With a 300 A load applied, voltage stabilizes at 9.1 V. What decision follows?
Correct answer: C - The battery fails the temperature-corrected load test
The A/C cools normally at 45 mph but warms at idle. At idle, both low- and high-side pressures rise, with the high side rising sharply. The condenser-fan command is ON, but the fan does not run. Which repair target is supported by this pattern?
Correct answer: D - Restore condenser airflow
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