200+ Free ASE G1 Practice Questions

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2026 Statistics

Key Facts: ASE G1 Exam

Not published

Pass Rate

ASE

Not published

Passing Score

ASE

Total Questions (45 scored)

2026 ASE G1 Study Guide

24%

Suspension Domain

Largest section

1 Year

Experience Required

ASE G1

5 Years

Certification Valid

Recertification required

The ASE G1 test has 55 total questions (45 scored and 10 unscored research) in 90 minutes. ASE does not publish a fixed percentage cut score or a G1 pass rate. Suspension and Steering accounts for 24% of the official blueprint, followed by Brakes at 20%. Certification requires passing G1 plus 1 year of relevant repair-technician experience, with permitted education substitutions, and is valid for 5 years.

Sample ASE G1 Practice Questions

Try these sample questions to test your ASE G1 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1A technician is performing an oil change on a vehicle with a 5-quart oil capacity. The vehicle has been sitting for 2 hours after being driven. What is the correct procedure?

A.Drain the oil immediately and refill with 5 quarts of new oil

B.Warm up the engine for 5 minutes, then drain the oil and refill with the specified amount

C.Add 1 quart of fresh oil to the old oil before draining to flush the system

D.Drain the oil cold and refill with 6 quarts to compensate for residual oil

Explanation: Warming the engine before an oil change allows the oil to flow more freely, carrying contaminants out with it. The specified capacity should always be used; overfilling can cause engine damage. Running the engine briefly thins the oil and suspends contaminants for better removal.

2When replacing an oil filter, the technician notices oil leaking from the filter mounting surface after installation. What is the MOST likely cause?

A.The filter is defective and needs to be replaced with a different brand

B.The old filter gasket remained on the mounting surface, creating a double-gasket condition

C.The new filter was not filled with oil before installation

D.The engine oil pressure is too high for the filter design

Explanation: A stuck old gasket is a common cause of oil filter leaks. The rubber gasket from the previous filter can stick to the mounting surface, and when the new filter is installed with its own gasket, the double-gasket creates a leak path. Always inspect and clean the mounting surface before installing a new filter.

3During a routine inspection, the technician finds the engine air filter to be lightly dirty with some debris. The filter was replaced 15,000 miles ago. What is the correct recommendation?

A.Replace the filter immediately regardless of condition

B.Clean the filter with compressed air blowing from the outside inward

C.Replace the filter only if it shows visible damage or restricts airflow

D.Clean the filter with soap and water, then reinstall

Explanation: Air filters should be replaced based on condition and restriction, not just mileage. Light debris can often be removed by tapping gently. If the filter is not excessively dirty and shows no damage, it may still be serviceable. However, most manufacturers recommend replacement at specified intervals or when visibly contaminated.

4A technician is replacing spark plugs on an engine with aluminum cylinder heads. What is the MOST important consideration during installation?

A.Apply anti-seize compound to all spark plug threads regardless of manufacturer recommendation

B.Use a torque wrench to tighten to the specified torque to prevent thread damage

C.Hand-tighten only to avoid over-torquing the plugs

D.Always replace spark plugs when the engine is hot for easier removal

Explanation: Aluminum heads are softer than cast iron and spark plug threads can be easily damaged by improper torque. Always use a torque wrench and follow manufacturer specifications. Some modern spark plugs have coated threads and should not have anti-seize applied as it can affect torque readings.

5During inspection, the serpentine belt shows small cracks across the ribbed surface but the ribs are not missing. What is the correct recommendation?

A.The belt is acceptable and does not need replacement

B.Replace the belt immediately as cracking indicates imminent failure

C.Replace the belt if cracks are deep enough to reach the fabric backing or if pieces are missing

D.Apply belt dressing to extend the belt life

Explanation: Minor surface cracking on serpentine belts is common and does not necessarily indicate failure. Replacement is recommended when cracks penetrate to the fabric backing, when chunks of rib material are missing, or when glazing (shiny, hardened surface) is present. Belt dressing is generally not recommended as it can attract dirt.

6A technician is performing a coolant flush on a vehicle with a history of cooling system neglect. The old coolant is very dirty and contaminated. What is the BEST procedure?

A.Drain and refill with new coolant only, as flushing can dislodge deposits that may clog the radiator

B.Use a chemical flush cleaner, run the engine, then drain and refill with the specified coolant mixed with distilled water

C.Flush only with tap water multiple times, then refill with straight antifreeze for maximum protection

D.Replace the radiator along with the coolant to ensure cleanliness

Explanation: For neglected cooling systems, a chemical flush helps remove scale and deposits. The system should be flushed according to manufacturer procedures, then refilled with the correct coolant type mixed to the proper concentration (usually 50/50) using distilled water to prevent mineral deposits.

7A customer reports slow cranking, especially on cold mornings. Battery voltage measures 12.4V with the engine off. What should the technician do NEXT?

A.Replace the battery immediately as the voltage is too low

B.Perform a load test or conductance test to determine battery capacity

C.Charge the battery and return the vehicle to the customer

D.Check the alternator output as the battery voltage indicates undercharging

Explanation: Static voltage alone does not fully assess battery condition. A fully charged battery reads approximately 12.6V; 12.4V indicates about 75% charge. A load test or conductance test evaluates the battery's ability to deliver current under load, which is critical for proper diagnosis. Slow cranking in cold weather often indicates reduced battery capacity.

8When replacing a battery, the technician notices the replacement battery has a vent tube fitting but the old battery did not. What is the correct action?

A.Install the battery without connecting the vent tube since the original did not have one

B.Ensure the vent tube is properly connected to route battery gases safely away from the vehicle

C.Return the battery as it is not the correct application

D.Seal the vent fitting with a plug to prevent acid leakage

Explanation: If the replacement battery has a vent tube fitting, it should be connected even if the original battery did not have one. The vent tube routes potentially explosive hydrogen gas away from the battery compartment and electrical components. Some vehicles require vented batteries based on mounting location and safety regulations.

9When checking automatic transmission fluid level, the dipstick shows the fluid at the "ADD" mark when the engine is cold. What is the correct procedure?

A.Add fluid immediately to bring it to the "FULL" mark while cold

B.Warm up the engine to operating temperature and check the fluid level on the hot marks

C.The level is acceptable and no action is needed

D.Drain and refill the transmission with new fluid

Explanation: Most automatic transmissions require the fluid to be checked at operating temperature with the engine running. Fluid expands when hot, so checking cold can give a false low reading. Always follow the manufacturer-specified procedure, which typically requires the transmission to be at normal operating temperature and the engine idling in Park.

10The automatic transmission fluid appears dark brown with a slight burnt smell but no debris. The vehicle has 45,000 miles since the last service. What is the correct recommendation?

A.Perform a complete transmission fluid exchange service

B.Add a transmission conditioner to restore fluid properties

C.Replace the transmission as the burnt smell indicates internal damage

D.The fluid condition is normal and service is not required

Explanation: Dark brown color with a slight burnt odor indicates the fluid is degraded and should be serviced. A fluid exchange service replaces the old fluid with new fluid of the correct type and specification specified by the manufacturer. Adding conditioners is not a substitute for proper fluid service.

About the ASE G1 Exam

The ASE G1 Auto Maintenance and Light Repair certification is an entry-level certification designed for technicians who perform maintenance and light repair tasks. The exam covers Engine Systems (16%), Automatic Transmission/Transaxle (7%), Manual Drive Train and Axles (11%), Suspension and Steering (24%), Brakes (20%), Electrical (15%), and HVAC (7%). This certification is ideal for lube technicians, maintenance technicians, and entry-level service technicians.

Assessment

55 total multiple-choice questions (45 scored + 10 unscored research)

Time Limit

90 minutes

Passing Score

Not published by ASE

Exam Fee

$62 test fee + $34 registration fee per order (National Institute for Automotive Service Excellence (ASE))

ASE G1 Exam Content Outline

16%

Engine Systems

Oil changes, filter replacement, spark plugs, ignition coils, drive belts, hoses, coolant service, battery testing and replacement, basic diagnostics, OBD2 scanning

Automatic Transmission/Transaxle

Fluid checks and service, filter replacement, leak diagnosis, shift quality diagnosis

11%

Manual Drive Train and Axles

Clutch operation, CV joints and boots, drive shafts, U-joints, differential fluid service, wheel bearings, axle seals

24%

Suspension and Steering

Shock and strut inspection/replacement, ball joints, tie rods, control arms, stabilizer bar links, wheel alignment, power steering system, suspension noise diagnosis

20%

Brakes

Brake pad and shoe inspection/replacement, rotor and drum inspection/service, brake fluid service, caliper inspection, brake bleeding, ABS system diagnosis, parking brake adjustment

15%

Electrical

Battery testing and replacement, starting and charging system tests, lighting systems, fuses and relays, wiring inspection, wiper motor diagnosis

HVAC

A/C system inspection and performance test, refrigerant level check, leak detection, heater performance, blower motor, cabin air filter replacement

How to Pass the ASE G1 Exam

What You Need to Know

Passing score: Not published by ASE
Assessment: 55 total multiple-choice questions (45 scored + 10 unscored research)
Time limit: 90 minutes
Exam fee: $62 test fee + $34 registration fee per order

Keys to Passing

Work through all 200 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

ASE G1 Study Tips from Top Performers

1Master oil change procedures including proper drain plug torque and oil filter installation

2Know brake pad replacement procedures including caliper inspection and brake bleeding sequences

3Understand wheel alignment angles including toe, camber, and caster and their effects on tire wear

4Practice interpreting OBD2 scan tool data and common diagnostic trouble codes

5Study battery testing procedures including load testing and charging system verification

6Learn A/C system performance testing including manifold gauge interpretation

7Know suspension component inspection procedures including ball joint and tie rod wear indicators

Frequently Asked Questions

What is the ASE G1 exam pass rate?

ASE does not publish a G1 pass-rate percentage or a fixed percentage cut score. Use the official task list and score-report domains to judge readiness rather than targeting an unofficial 70% threshold.

How hard is the ASE G1 exam?

The ASE G1 is considered moderately easy to moderately difficult, making it an excellent entry-level certification. The exam focuses on routine maintenance procedures and light repair tasks that most technicians perform regularly. Hands-on experience with oil changes, brake jobs, and basic electrical work is essential for success.

How many questions are on the ASE G1 exam?

The 2026 official G1 study guide lists 55 total questions: 45 scored questions plus 10 unscored research questions, with 90 minutes for the test. Because candidates cannot identify the research questions, answer every question. ASE does not publish a fixed passing percentage.

What topics are covered on the ASE G1?

The exam covers seven main areas: Engine Systems (16%) including oil changes and filter replacement; Suspension and Steering (24%) including shocks, struts, and alignment; Brakes (20%) including pad replacement and brake fluid service; Electrical (15%) including battery and lighting systems; Manual Drive Train (11%) including CV joints; Automatic Transmission (7%); and HVAC (7%).

What is the experience requirement for ASE G1?

G1 certification requires 1 year of full-time relevant repair-technician experience (or part-time equivalent). ASE permits specific education substitutions: an ASE-accredited program can provide 6 months of credit, an eligible OEM co-op can provide 1 year, three ASE Entry-Level tests can provide 6 months, and other training can provide up to 6 months under ASE's published conversion rule.

How long should I study for the ASE G1 exam?

Plan for 30-40 hours of study over 2-3 weeks. This should include reviewing ASE task lists, studying maintenance procedures and specifications, practicing with 200+ exam-style questions, and reviewing basic automotive systems. Hands-on practice with common maintenance tasks is highly beneficial.

What is the salary for ASE G1 certified technicians?

ASE does not publish a salary guarantee for G1. Pay varies by location, employer, experience, and job duties; treat G1 as evidence of tested maintenance-and-light-repair knowledge, not as a promise of a particular wage.