G1 Auto Maintenance
& Light Repair

Diagnostic Practice — Test 2
ASE-style · 25 Q
Question 01 / 25
Answered 00 / 25
Status IN PROGRESS
Q 01Tech A/B

Technician A says brake fluid absorbs moisture from the air through hoses and the reservoir over time. Technician B says absorbed moisture lowers the fluid 's boiling point and can cause fade under heavy braking. Who is right?

Q 02Scenario-Based

A vehicle clunks from the engine bay during rapid throttle changes and when the clutch is released from a stop. The exhaust is secure. What is indicated?

Q 03Data-Driven

These front alignment readings were taken on a vehicle that pulls to the left. What should be corrected?

AngleSpecToleranceLeftRight
Caster3.5°±0.83.4°3.6°
Camber−0.3°±0.50.9°−0.4°
Toe (each)0.08°±0.050.08°0.08°
Q 04Component Function

The primary function of the EVAP charcoal canister is to:

Q 05Most Likely

A tire shows a feathered wear pattern that is sharp on one edge of each tread rib and smooth on the other. What is the MOST likely cause?

Q 06Least Likely / EXCEPT

Which of these is the LEAST likely cause of windshield wipers that sweep normally but fail to return to the park position?

Q 07Tech A/B

Technician A says a serpentine belt that squeals on a cold start is corrected by applying belt dressing. Technician B says a tensioner that has lost spring tension allows belt slip even with a new belt. Who is right?

Q 08Procedure/Tool

Which of these is correct when bleeding a hydraulic clutch release system?

Q 09Scenario-Based

Red fluid is found dripping at the front of the vehicle near the radiator. The transmission fluid level is low and the engine oil level is normal. What is indicated?

Q 10Data-Driven

A 600 CCA battery reads 12.6 volts at rest. It is loaded at 300 amps for 15 seconds at 70°F and drops to 9.1 volts. What is indicated?

Q 11Component Function

A torn rack and pinion bellows boot will most directly cause:

Q 12Least Likely / EXCEPT

Any of these could cause a brake pedal that slowly sinks under steady pressure EXCEPT:

Q 13Tech A/B

Technician A says a thrust angle other than zero can leave the steering wheel off-center after a front toe adjustment. Technician B says thrust angle is corrected by adjusting front toe. Who is right?

Q 14Most Likely

An A/C system cools poorly. High side reads 375 psi and low side reads 55 psi at 85°F ambient. What is the MOST likely cause?

Q 15Scenario-Based

A vehicle produces a growling noise at 45 mph that gets louder when swerving left and quieter when swerving right. Tire tread is even. What is indicated?

Q 16Procedure/Tool

Which of these is correct when refilling a cooling system after a drain?

Q 17Data-Driven

A brake drum is cast with a maximum diameter of 9.060 in. It measures 9.078 in. after cleaning. What is indicated?

Q 18Least Likely / EXCEPT

Which of these is the LEAST likely cause of a rattle from the rear suspension over small bumps?

Q 19Tech A/B

Technician A says a transmission fluid exchange makes replacing the filter unnecessary. Technician B says RTV sealant should be applied to a new pan gasket. Who is right?

Q 20Component Function

The primary function of a rear axle housing vent is to:

Q 21Most Likely

An engine ticks loudly at cold start from the front of the engine. The tick fades as the engine warms and is loudest under load. What is the MOST likely cause?

Q 22Scenario-Based

A rear drum parking brake holds only after the lever travels nearly its full range. The service brakes work normally and the shoes have adequate lining. What is indicated?

Q 23Procedure/Tool

Which of these is correct when testing a vacuum power brake booster?

Q 24Least Likely / EXCEPT

Which of these is the LEAST likely indication of a refrigerant leak?

Q 25Tech A/B

Technician A says a halogen bulb may be handled by the glass envelope if the hands are clean. Technician B says headlight aim should be checked after replacing a headlamp assembly. Who is right?

Answers and explanations are revealed after you submit the full test.
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Reading Your Results: G1 Auto Maintenance and Light Repair, Test 2

This test covers the same breadth as Test 1 but leans harder on the judgment calls maintenance work actually turns on: what a fluid is telling you, whether a part is worn out or simply out of adjustment, and which shortcuts create a comeback. Reading your misses that way is more useful than sorting them by system.

If you missed the questions about identifying a fluid

A leak is identified by the fluid before it is identified by location, because fluid runs and airflow spreads it. Red or pink and thin is usually transmission fluid or power steering fluid, amber to black and heavier is engine oil, sweet-smelling and not oily is coolant, and clear and slick with a distinct smell is brake fluid. That first call narrows the possible sources immediately, and it matters on a maintenance exam because the same drip near the front of a vehicle can come from three different systems. Confirming which system is actually down on level is what turns a guess into a diagnosis.

If you missed the questions built on a measurement

Three questions here compare a reading to a published figure, and each one is asking whether you know what the specification is protecting.

Battery load test. The standard test loads a battery at half its cold cranking rating for fifteen seconds, and a serviceable battery holds above roughly 9.6 volts at 70 degrees. The temperature qualifier matters, because the acceptable minimum falls as the battery gets colder, which is why a test result is read against conditions rather than against one number.
Drum diameter. A maximum diameter is cast into the drum, and a drum measuring past it is discarded rather than machined, since machining only removes more material. The limit exists because an oversize drum has thinner walls, less mass to absorb heat, and shoes that no longer contact across their full width.
Alignment readings with a pull. A pull points toward the side with more positive camber or less positive caster, so the diagnostic value is the side-to-side comparison rather than either number by itself. Correcting the side that is out, rather than splitting the difference, is what puts the vehicle back on the road straight.

If you missed the questions about the right way to do the job

Several questions on this test separate the correct procedure from the shortcut that seems to work. Belt dressing quiets a squeal for a few days and does nothing about the tensioner or the glazed belt causing it. A fluid exchange moves fluid but does not remove the filter that has been collecting debris. A cooling system is refilled with the bleed point open so air can leave, because an air pocket produces an overheat that no amount of coolant fixes. A halogen bulb is handled by the base rather than the glass, since skin oil creates a hot spot that shortens its life. On the exam these questions are asking whether you know why the correct method is the correct method.

If you missed the EXCEPT and LEAST likely questions

Four appear on this test, and the method is the same one that works on the real exam. Identify what the three real causes share before you look for the odd one out. On the sinking pedal question, three answers all let fluid escape the pressurized side of the system, and one affects how the brake applies rather than whether it holds. On the refrigerant leak question, three answers are all evidence that refrigerant and oil are escaping, and one is a condition that appears with a full charge. Naming the shared trait first is faster and far more reliable than working through four options one at a time.

If both free tests are landing comfortably above 70 percent, the premium G1 tests move into harder diagnostic scenarios on a 30-minute clock. They also score you by ASE content area and by question type, and give you the official ASE task number for every question you miss, so you can take those numbers straight to the study guide instead of rereading a chapter.

Every Question, Your Answer, and Why

The ones you missed are open. Click any other question to see the answer and explanation.
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