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ASE task lists for 43 ASE tests

The short version: ASE builds each certification test on the Test Specifications and Task List in its official study guide. This page covers 43 ASE tests: each test's content areas and how many questions each one gets, with a link to its full task list, in ASE's words, on its practice page.

43ASE tests, one task list each

3,230tasks across the lists

2026the study guides they come from

Read from ASE's study guides on October 20, 2026. Each list below is ASE's, in ASE's words; the guides on ASE's study guides page are the current version.

A1 A2 A3 A4 A5 A6 A7 A8 A9 B2 B3 B4 B5 B6 G1 H1 H2 H3 H4 H5 H6 H7 H8 L1 L2 L3 L4 T1 T2 T3 T4 T5 T6 T7 T8 S1 S2 S3 S4 S5 S6 S7 F1 xEV

How to use them

Read the list for your test first. In ASE's words: “Every question on the test represents one or more of these tasks, although some tasks may not appear on the version of the test that you see.” Anything on the list is fair game.
Spend your time where the questions are. The test specifications give every content area's share of the questions, so a big area deserves more of your study time than a small one.
Check yourself task by task. ASE's advice is to “use the Task List to identify weak areas and to select learning resources.” If you can't explain a task or say how you'd do it, that is the next thing to study.

Every task on 42 of these 43 lists has questions in our bank.

Automobile & Light Truck

A1 — Engine Repair

55 questions (45 scored) in 75 minutes · 5 content areas · 78 tasks · ASE Automobile Study Guide (2026)

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	18
B Cylinder Head and Valve Train Diagnosis and Repair	6
C Engine Block Diagnosis and Repair	4
D Lubrication and Cooling Systems Diagnosis and Repair	8
E Fuel, Electrical, Ignition, Air Induction, and Exhaust Systems Diagnosis and Service	9
Total	45

The full A1 task list, with 162 practice questions · ASE's study guides

A2 — Automatic Transmission/Transaxle

55 questions (45 scored) in 75 minutes · 3 content areas · 63 tasks · ASE Automobile Study Guide (2026)

Covers: Transmission/Transaxle Diagnosis · In-Vehicle Transmission/Transaxle Maintenance and Repair · Transmission/Transaxle Removal, Inspection, and Installation

Test specifications: questions by content area

Content area	Questions in test
A Transmission/Transaxle Diagnosis	26
B In-Vehicle Transmission/Transaxle Maintenance and Repair	12
C Transmission/Transaxle Removal, Inspection, and Installation	7
Total	45

The full A2 task list, with 159 practice questions · ASE's study guides

A3 — Manual Drive Train and Axles

50 questions (40 scored) in 60 minutes · 6 content areas · 86 tasks · ASE Automobile Study Guide (2026)

Covers: Clutch Diagnosis and Repair · Transmission Diagnosis and Repair · Transaxle Diagnosis and Repair · Drive Shaft/Half-Shaft and Universal Joint/Constant Velocity (CV) Joint Diagnosis and Repair (Front and Rear Wheel Drive) · Drive Axle Diagnosis and Repair · Four-Wheel Drive/All-Wheel Drive Component Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Clutch Diagnosis and Repair	6
B Transmission Diagnosis and Repair	7
C Transaxle Diagnosis and Repair	7
D Drive Shaft/Half-Shaft and Universal Joint/Constant Velocity (CV) Joint Diagnosis and Repair (Front and Rear Wheel Drive)	5
E Drive Axle Diagnosis and Repair	7
F Four-Wheel Drive/All-Wheel Drive Component Diagnosis and Repair	8
Total	40

The full A3 task list, with 169 practice questions · ASE's study guides

A4 — Suspension and Steering

50 questions (40 scored) in 60 minutes · 4 content areas · 81 tasks · ASE Automobile Study Guide (2026)

Covers: Steering Systems Diagnosis and Repair · Suspension Systems Diagnosis and Repair · Wheel Alignment Diagnosis, Adjustment, and Repair · Wheel and Tire Diagnosis and Service

Test specifications: questions by content area

Content area	Questions in test
A Steering Systems Diagnosis and Repair	12
B Suspension Systems Diagnosis and Repair	12
C Wheel Alignment Diagnosis, Adjustment, and Repair	11
D Wheel and Tire Diagnosis and Service	5
Total	40

The full A4 task list, with 156 practice questions · ASE's study guides

A5 — Brakes

55 questions (45 scored) in 75 minutes · 4 content areas · 68 tasks · ASE Automobile Study Guide (2026)

Covers: Hydraulic, Power Assist and Parking Brake Systems Diagnosis and Repair · Drum Brake Diagnosis and Repair · Disc Brake Diagnosis and Repair · Electronic Brake Control Systems: Antilock Brake System (ABS), Traction Control System (TCS), and Electronic Stability Control System (ESC) Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Hydraulic, Power Assist and Parking Brake Systems Diagnosis and Repair	19
B Drum Brake Diagnosis and Repair	5
C Disc Brake Diagnosis and Repair	11
D Electronic Brake Control Systems: Antilock Brake System (ABS), Traction Control System (TCS), and Electronic Stability Control System (ESC) Diagnosis and Repair	10
Total	45

The full A5 task list, with 148 practice questions · ASE's study guides

A6 — Electrical/Electronic Systems

60 questions (50 scored) in 90 minutes · 5 content areas · 52 tasks · ASE Automobile Study Guide (2026)

Covers: General Electrical/Electronic System Diagnosis · Battery and Starting System Diagnosis and Repair · Charging System Diagnosis and Repair · Lighting Systems Diagnosis and Repair · Body Electrical Systems Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Electrical/Electronic System Diagnosis	13
B Battery and Starting System Diagnosis and Repair	9
C Charging System Diagnosis and Repair	5
D Lighting Systems Diagnosis and Repair	6
E Body Electrical Systems Diagnosis and Repair	17
Total	50

The full A6 task list, with 148 practice questions · ASE's study guides

A7 — Heating and Air Conditioning

60 questions (50 scored) in 75 minutes · 3 content areas · 74 tasks · ASE Automobile Study Guide (2026)

Covers: Heating, Ventilation, A/C (HVAC), and Engine Cooling System Service, Diagnosis, and Repair · Refrigeration System Component Diagnosis and Repair · Operating Systems and Related Controls Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Heating, Ventilation, A/C (HVAC), and Engine Cooling System Service, Diagnosis, and Repair	21
B Refrigeration System Component Diagnosis and Repair	10
C Operating Systems and Related Controls Diagnosis and Repair	19
Total	50

ASE's table prints a Total of 40, but its rows add up to 50, the length of the A7 test.

The full A7 task list, with 159 practice questions · ASE's study guides

A8 — Engine Performance

60 questions (50 scored) in 75 minutes · 5 content areas · 67 tasks · ASE Automobile Study Guide (2026)

Covers: General Diagnosis · Ignition System Diagnosis and Repair · Fuel, Air Induction and Exhaust System Diagnosis and Repair · Emissions Control Systems Diagnosis and Repair · Computerized Engine Controls Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Diagnosis	12
B Ignition System Diagnosis and Repair	8
C Fuel, Air Induction and Exhaust System Diagnosis and Repair	9
D Emissions Control Systems Diagnosis and Repair	8
E Computerized Engine Controls Diagnosis and Repair	13
Total	50

The full A8 task list, with 158 practice questions · ASE's study guides

A9 — Light Vehicle Diesel Engines

60 questions (50 scored) in 75 minutes · 6 content areas · 83 tasks · ASE Automobile Study Guide (2026)

Covers: General Diagnosis · Cylinder Head and Valve Train Diagnosis and Repair · Engine Block Diagnosis and Repair · Lubrication and Cooling Systems Diagnosis and Repair · Air Induction and Exhaust Systems Diagnosis and Repair · Fuel System Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Diagnosis	9
B Cylinder Head and Valve Train Diagnosis and Repair	5
C Engine Block Diagnosis and Repair	5
D Lubrication and Cooling Systems Diagnosis and Repair	6
E Air Induction and Exhaust Systems Diagnosis and Repair	12
F Fuel System Diagnosis and Repair	13
Total	50

The full A9 task list, with 189 practice questions · ASE's study guides

Collision Repair & Refinish

B2 — Painting and Refinishing

65 questions (55 scored) in 90 minutes · 6 content areas · 66 tasks · ASE Collision Study Guide (2026)

Covers: Surface Preparation · Spray Gun Operation and Related Equipment · Paint Mixing, Matching, and Applying · Solving Paint Application Problems · Finish Defects, Causes, and Cures · Safety Precautions

Test specifications: questions by content area

Content area	Questions in test
A Surface Preparation	15
B Spray Gun Operation and Related Equipment	6
C Paint Mixing, Matching, and Applying	15
D Solving Paint Application Problems	8
E Finish Defects, Causes, and Cures	6
F Safety Precautions	5
Total	55

The full B2 task list, with 177 practice questions · ASE's study guides

B3 — Non-Structural Analysis and Damage Repair

65 questions (55 scored) in 90 minutes · 6 content areas · 66 tasks · ASE Collision Study Guide (2026)

Covers: Preparation · Outer Body Panel Repairs, Replacements, and Adjustments · Metal Finishing and Body Filling · Glass and Hardware · Welding, Cutting, and Removal · Plastic Repair

Test specifications: questions by content area

Content area	Questions in test
A Preparation	7
B Outer Body Panel Repairs, Replacements, and Adjustments	17
C Metal Finishing and Body Filling	8
D Glass and Hardware	5
E Welding, Cutting, and Removal	12
F Plastic Repair	6
Total	55

The full B3 task list, with 204 practice questions · ASE's study guides

B4 — Structural Analysis and Damage Repair

60 questions (50 scored) in 75 minutes · 4 content areas · 51 tasks · ASE Collision Study Guide (2026)

Covers: Frame Inspection and Repair · Unibody and Unitized Structure Inspection, Measurement, and Repair · Stationary Glass · Welding, Cutting, and Joining

Test specifications: questions by content area

Content area	Questions in test
A Frame Inspection and Repair	16
B Unibody and Unitized Structure Inspection, Measurement, and Repair	18
C Stationary Glass	4
D Welding, Cutting, and Joining	12
Total	50

The full B4 task list, with 181 practice questions · ASE's study guides

B5 — Mechanical and Electrical Components

60 questions (50 scored) in 75 minutes · 8 content areas · 122 tasks · ASE Collision Study Guide (2026)

Covers: Suspension and Steering · Electrical · Brakes · Heating and Air Conditioning · Engine Cooling Systems · Drive Train · Fuel, Intake and Exhaust Systems · Restraint Systems

Test specifications: questions by content area

Content area	Questions in test
A Suspension and Steering	11
B Electrical	10
C Brakes	4
D Heating and Air Conditioning	5
E Engine Cooling Systems	4
F Drive Train	5
G Fuel, Intake and Exhaust Systems	3
H Restraint Systems	8
Total	50

The full B5 task list, with 228 practice questions · ASE's study guides

B6 — Damage Analysis and Estimating

60 questions (50 scored) in 75 minutes · 7 content areas · 122 tasks · ASE Collision Study Guide (2026)

Covers: Damage Analysis · Estimating · Legal and Environmental Practices · Vehicle Construction · Vehicle Systems Knowledge (Includes Electric/Hybrid/Alternate Fuel Vehicles) · Parts Identification and Source Determination · Customer Relations and Sales Skills

Test specifications: questions by content area

Content area	Questions in test
A Damage Analysis	11
B Estimating	13
C Legal and Environmental Practices	3
D Vehicle Construction	6
E Vehicle Systems Knowledge (Includes Electric/Hybrid/Alternate Fuel Vehicles)	11
F Parts Identification and Source Determination	4
G Customer Relations and Sales Skills	2
Total	50

The full B6 task list, with 243 practice questions · ASE's study guides

Maintenance & Light Repair

G1 — Auto Maintenance and Light Repair

55 questions (45 scored) in 90 minutes · 7 content areas · 173 tasks · ASE Auto Maintenance & Light Repair Study Guide (2026)

Covers: Engine Systems · Automatic Transmission/Transzxle · Manual Drive Train and Axles · Suspension and Steering · Brakes · Electrical · Heating, Ventilation, and Air Conditioning

Test specifications: questions by content area

Content area	Questions in test
A Engine Systems	9
B Automatic Transmission/Transzxle	4
C Manual Drive Train and Axles	6
D Suspension and Steering	13
E Brakes	11
F Electrical	8
G Heating, Ventilation, and Air Conditioning	4
Total	55

ASE's table prints a Total of 50, but its rows add up to 55: G1's table counts all 55 questions on the test, scored and unscored (ASE lists G1 as 55 total, 45 scored).

The full G1 task list, with 275 practice questions · ASE's study guides

Transit Bus

H1 — Compressed Natural Gas (CNG) Engines

60 questions (50 scored) in 75 minutes · 8 content areas · 97 tasks · ASE Transit Bus Study Guide (2026)

Covers: General Engine Diagnosis · Cylinder Head and Valve Train Diagnosis and Repair · Engine Block Diagnosis, Repair and Overhaul · Lubrication and Cooling Systems Diagnosis and Repair · Air Induction and Exhaust Systems Diagnosis and Repair · Fuel System Inspection, Diagnosis and Repair · Starting and Charging System Diagnosis and Repair · Ignition System Inspection, Diagnosis, and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	9
B Cylinder Head and Valve Train Diagnosis and Repair	4
C Engine Block Diagnosis, Repair and Overhaul	4
D Lubrication and Cooling Systems Diagnosis and Repair	4
E Air Induction and Exhaust Systems Diagnosis and Repair	7
F Fuel System Inspection, Diagnosis and Repair	14
G Starting and Charging System Diagnosis and Repair	4
H Ignition System Inspection, Diagnosis, and Repair	4
Total	50

The full H1 task list, with 245 practice questions · ASE's study guides

H2 — Diesel Engines

60 questions (50 scored) in 75 minutes · 7 content areas · 99 tasks · ASE Transit Bus Study Guide (2026)

Covers: General Engine Diagnosis · Cylinder Head and Valve Train Diagnosis and Repair · Engine Block Diagnosis, Repair and Overhaul · Lubrication and Cooling Systems Diagnosis and Repair · Air Induction and Exhaust Systems Diagnosis and Repair · Fuel System Diagnosis and Repair · Starting and Charging System Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	14
B Cylinder Head and Valve Train Diagnosis and Repair	4
C Engine Block Diagnosis, Repair and Overhaul	4
D Lubrication and Cooling Systems Diagnosis and Repair	7
E Air Induction and Exhaust Systems Diagnosis and Repair	6
F Fuel System Diagnosis and Repair	11
G Starting and Charging System Diagnosis and Repair	4
Total	50

The full H2 task list, with 237 practice questions · ASE's study guides

H3 — Drive Train

50 questions (40 scored) in 60 minutes · 3 content areas · 29 tasks · ASE Transit Bus Study Guide (2026)

Covers: Automatic Transmission Diagnosis and Repair · Drive Shaft and Universal Joint Diagnosis and Repair · Drive Axle Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Automatic Transmission Diagnosis and Repair	28
B Drive Shaft and Universal Joint Diagnosis and Repair	4
C Drive Axle Diagnosis and Repair	8
Total	40

The full H3 task list, with 177 practice questions · ASE's study guides

H4 — Brakes

60 questions (50 scored) in 75 minutes · 4 content areas · 42 tasks · ASE Transit Bus Study Guide (2026)

Covers: Air Supply and Service Systems Diagnosis and Repair · Mechanical/Foundation Brakes Diagnosis and Repair · Parking Brakes Diagnosis and Repair · Wheel Bearings Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Air Supply and Service Systems Diagnosis and Repair	24
B Mechanical/Foundation Brakes Diagnosis and Repair	14
C Parking Brakes Diagnosis and Repair	7
D Wheel Bearings Diagnosis and Repair	5
Total	50

The full H4 task list, with 186 practice questions · ASE's study guides

H5 — Suspension and Steering

55 questions (45 scored) in 75 minutes · 4 content areas · 55 tasks · ASE Transit Bus Study Guide (2026)

Covers: Steering System Diagnosis and Repair · Suspension Systems Diagnosis and Repair · Wheel Alignment Diagnosis, Adjustment, and Repair · Wheels and Tires Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Steering System Diagnosis and Repair	12
B Suspension Systems Diagnosis and Repair	23
C Wheel Alignment Diagnosis, Adjustment, and Repair	6
D Wheels and Tires Diagnosis and Repair	4
Total	45

The full H5 task list, with 180 practice questions · ASE's study guides

H6 — Electrical/Electronic Systems

60 questions (50 scored) in 90 minutes · 5 content areas · 66 tasks · ASE Transit Bus Study Guide (2026)

Test specifications: questions by content area

Content area	Questions in test
A General Electrical/Electronic System Diagnosis	16
B Battery and Starting System Diagnosis and Repair	12
C Charging System Diagnosis and Repair	7
D Lighting Systems Diagnosis and Repair	7
E Related Vehicle Systems Diagnosis and Repair	8
Total	50

The full H6 task list, with 186 practice questions · ASE's study guides

H7 — Heating, Ventilation, and Air Conditioning

50 questions (40 scored) in 75 minutes · 3 content areas · 54 tasks · ASE Transit Bus Study Guide (2026)

Covers: A/C System and Component Diagnosis, Service, and Repair · Heating and Engine Cooling Systems Diagnosis, Service, and Repair · Heating, Ventilation, and Air Conditioning Operating Systems and Related Controls Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A A/C System and Component Diagnosis, Service, and Repair	22
B Heating and Engine Cooling Systems Diagnosis, Service, and Repair	8
C Heating, Ventilation, and Air Conditioning Operating Systems and Related Controls Diagnosis and Repair	10
Total	40

The full H7 task list, with 184 practice questions · ASE's study guides

H8 — Preventive Maintenance and Inspection (PMI)

60 questions (50 scored) in 75 minutes · 4 content areas · 132 tasks · ASE Transit Bus Study Guide (2026)

Covers: Engine Systems · Body Interior and Exterior · Electrical/Electronic Systems · Frame and Chassis

Test specifications: questions by content area

Content area	Questions in test
A Engine Systems	17
B Body Interior and Exterior	5
C Electrical/Electronic Systems	9
D Frame and Chassis	19
Total	50

The full H8 task list, with 247 practice questions · ASE's study guides

Advanced Level

L1 — Advanced Engine Performance Specialist

60 questions (50 scored) in 150 minutes · 6 content areas · 103 tasks · ASE Advanced Engine Performance Specialist Test Information (2026)

Covers: General Powertrain Diagnosis · Computerized Powertrain Controls Diagnosis - including OBD II · Ignition System Diagnosis · Fuel Systems and Air Induction Systems Diagnosis · Emission Control Systems Diagnosis · I/M Failure Diagnosis

Test specifications: questions by content area

Content area	Questions in test
A General Powertrain Diagnosis	6
B Computerized Powertrain Controls Diagnosis - including OBD II	16
C Ignition System Diagnosis	6
D Fuel Systems and Air Induction Systems Diagnosis	8
E Emission Control Systems Diagnosis	8
F I/M Failure Diagnosis	6
Total	50

The full L1 task list, with 238 practice questions · ASE's study guides

L2 — Electronic Diesel Engine Diagnosis Specialist

55 questions (45 scored) in 120 minutes · 5 content areas · 59 tasks · ASE Electronic Diesel Engine Diagnosis Specialist Test Information (2026)

Covers: General Inspection and Diagnosis · Electronic Engine Controls Diagnosis · Air Induction Systems Diagnosis · Fuel Systems Diagnosis · Emissions Systems Diagnosis

Test specifications: questions by content area

Content area	Questions in test
A General Inspection and Diagnosis	4
B Electronic Engine Controls Diagnosis	18
C Air Induction Systems Diagnosis	6
D Fuel Systems Diagnosis	8
E Emissions Systems Diagnosis	9
Total	45

The full L2 task list, with 171 practice questions · ASE's study guides

L3 — Light Duty Hybrid/Electric Vehicle Specialist

55 questions (45 scored) in 120 minutes · 5 content areas · 68 tasks · ASE Light Duty Hybrid/Electric Vehicle Specialist Test Information (2026)

Covers: High-Voltage (HV) Battery System · Internal Combustion Engine · Drive Systems · Power Electronics · Supporting Systems

Test specifications: questions by content area

Content area	Questions in test
A High-Voltage (HV) Battery System	11
B Internal Combustion Engine	6
C Drive Systems	9
D Power Electronics	13
E Supporting Systems	6
Total	45

The full L3 task list, with 197 practice questions · ASE's study guides

L4 — Advanced Driver Assistance Systems (ADAS) Specialist

50 questions (40 scored) in 120 minutes · 4 content areas · 69 tasks · ASE Advanced Driver Assistance Systems (ADAS) Specialist Test Information (2026)

Covers: General ADAS Service and Diagnosis · Camera-Based Systems Service and Diagnosis · RADAR-Based Systems Service and Diagnosis · Ultrasonic (Sonar)-Based Systems Service and Diagnosis

Test specifications: questions by content area

Content area	Questions in test
A General ADAS Service and Diagnosis	14
B Camera-Based Systems Service and Diagnosis	10
C RADAR-Based Systems Service and Diagnosis	12
D Ultrasonic (Sonar)-Based Systems Service and Diagnosis	4
Total	40

The full L4 task list, with 205 practice questions · ASE's study guides

Medium/Heavy Truck

T1 — Gasoline Engines

60 questions (50 scored) in 75 minutes · 8 content areas · 98 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: General Engine Diagnosis · Cylinder Head and Valve Train Diagnosis and Repair · Engine Block Diagnosis and Repair · Lubrication and Cooling Systems Diagnosis and Repair · Ignition System Diagnosis and Repair · Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair · Emissions Control Systems Diagnosis And Repair · Computerized Engine Controls Diagnosis And Repair

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	14
B Cylinder Head and Valve Train Diagnosis and Repair	4
C Engine Block Diagnosis and Repair	4
D Lubrication and Cooling Systems Diagnosis and Repair	3
E Ignition System Diagnosis and Repair	6
F Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair	6
G Emissions Control Systems Diagnosis And Repair	5
H Computerized Engine Controls Diagnosis And Repair	8
Total	50

The full T1 task list, with 186 practice questions · ASE's study guides

T2 — Diesel Engines

65 questions (55 scored) in 90 minutes · 8 content areas · 94 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: General Engine Diagnosis · Cylinder Head and Valve Train Diagnosis and Repair · Engine Block Diagnosis and Repair · Lubrication and Cooling Systems Diagnosis and Repair · Air Induction and Exhaust Systems Diagnosis and Repair · Fuel System Diagnosis and Repair · Starting and Charging System Diagnosis and Repair · Engine Brakes

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	11
B Cylinder Head and Valve Train Diagnosis and Repair	4
C Engine Block Diagnosis and Repair	5
D Lubrication and Cooling Systems Diagnosis and Repair	6
E Air Induction and Exhaust Systems Diagnosis and Repair	6
F Fuel System Diagnosis and Repair	16
G Starting and Charging System Diagnosis and Repair	4
H Engine Brakes	3
Total	55

The full T2 task list, with 193 practice questions · ASE's study guides

T3 — Drive Train

50 questions (40 scored) in 60 minutes · 4 content areas · 63 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: Clutch Diagnosis and Repair · Transmission Diagnosis and Repair · Driveshaft and Universal Joint Diagnosis and Repair · Drive Axle Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Clutch Diagnosis and Repair	11
B Transmission Diagnosis and Repair	13
C Driveshaft and Universal Joint Diagnosis and Repair	7
D Drive Axle Diagnosis and Repair	9
Total	40

The full T3 task list, with 162 practice questions · ASE's study guides

T4 — Brakes

60 questions (50 scored) in 75 minutes · 3 content areas · 67 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: Air Brakes Diagnosis and Repair · Hydraulic Brakes Diagnosis and Repair · Antilock Brake System (ABS), Automatic Traction Control (ATC), Electronic Stability Control System (ESC), and Collision Warning/Avoidance System Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Air Brakes Diagnosis and Repair	32
B Hydraulic Brakes Diagnosis and Repair	11
C Antilock Brake System (ABS), Automatic Traction Control (ATC), Electronic Stability Control System (ESC), and Collision Warning/Avoidance System Diagnosis and Repair	7
Total	50

The full T4 task list, with 171 practice questions · ASE's study guides

T5 — Suspension and Steering

60 questions (50 scored) in 75 minutes · 4 content areas · 57 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: Steering System Diagnosis and Repair · Suspension, Frame, and 5th Wheel Diagnosis and Repair · Wheel Alignment Diagnosis, Adjustment, and Repair · Wheels, Tires and Hub Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Steering System Diagnosis and Repair	12
B Suspension, Frame, and 5th Wheel Diagnosis and Repair	16
C Wheel Alignment Diagnosis, Adjustment, and Repair	13
D Wheels, Tires and Hub Diagnosis and Repair	9
Total	50

The full T5 task list, with 156 practice questions · ASE's study guides

T6 — Electrical/Electronic Systems

60 questions (50 scored) in 90 minutes · 5 content areas · 68 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Test specifications: questions by content area

Content area	Questions in test
A General Electrical/Electronic System Diagnosis	14
B Battery and Starting System Diagnosis and Repair	11
C Charging System Diagnosis and Repair	7
D Lighting Systems Diagnosis and Repair	6
E Related Vehicle Systems Diagnosis and Repair	12
Total	50

The full T6 task list, with 179 practice questions · ASE's study guides

T7 — Heating, Ventilation, and Air Conditioning (HVAC) Systems

50 questions (40 scored) in 60 minutes · 4 content areas · 56 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: HVAC Systems Diagnosis, Service, and Repair · A/C System and Component Diagnosis, Service, and Repair · Heating and Engine Cooling Systems Diagnosis, Service, and Repair · Operating Systems and Related Controls Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A HVAC Systems Diagnosis, Service, and Repair	6
B A/C System and Component Diagnosis, Service, and Repair	20
C Heating and Engine Cooling Systems Diagnosis, Service, and Repair	6
D Operating Systems and Related Controls Diagnosis and Repair	8
Total	40

The full T7 task list, with 159 practice questions · ASE's study guides

T8 — Preventive Maintenance and Inspection (PMI)

60 questions (50 scored) in 75 minutes · 5 content areas · 169 tasks · ASE Medium/Heavy Truck Study Guide (2026)

Covers: Engine Systems · Cab and Hood · Electrical/Electronics · Frame and Chassis · Road/Operational Test

Test specifications: questions by content area

Content area	Questions in test
A Engine Systems	10
B Cab and Hood	5
C Electrical/Electronics	10
D Frame and Chassis	22
E Road/Operational Test	3
Total	50

The full T8 task list, with 259 practice questions · ASE's study guides

School Bus

S1 — Body Systems and Special Equipment

60 questions (50 scored) in 75 minutes · 4 content areas · 40 tasks · ASE School Bus Study Guide (2026)

Covers: Safety and Emergency Equipment Systems Diagnosis and Repair · Body and Interior Maintenance · Installed Special Equipment Diagnosis and Repair · Heating Systems Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Safety and Emergency Equipment Systems Diagnosis and Repair	10
B Body and Interior Maintenance	14
C Installed Special Equipment Diagnosis and Repair	10
D Heating Systems Diagnosis and Repair	16
Total	50

The full S1 task list, with 187 practice questions · ASE's study guides

S2 — Diesel Engines

65 questions (55 scored) in 90 minutes · 6 content areas · 78 tasks · ASE School Bus Study Guide (2026)

Covers: General Engine Diagnosis · In-Chassis Engine Inspection and Repair · Lubrication and Cooling Systems Diagnosis and Repair · Air Induction and Exhaust Systems Diagnosis and Repair · Fuel System Diagnosis and Repair · Starting System Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A General Engine Diagnosis	15
B In-Chassis Engine Inspection and Repair	6
C Lubrication and Cooling Systems Diagnosis and Repair	7
D Air Induction and Exhaust Systems Diagnosis and Repair	9
E Fuel System Diagnosis and Repair	15
F Starting System Diagnosis and Repair	3
Total	55

The full S2 task list, with 210 practice questions · ASE's study guides

S3 — Drive Train

50 questions (40 scored) in 60 minutes · 3 content areas · 36 tasks · ASE School Bus Study Guide (2026)

Covers: Automatic Transmission Diagnosis and Repair · Drive Shaft and Universal Joint Diagnosis and Repair · Drive Axle Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Automatic Transmission Diagnosis and Repair	28
B Drive Shaft and Universal Joint Diagnosis and Repair	5
C Drive Axle Diagnosis and Repair	7
Total	40

The full S3 task list, with 175 practice questions · ASE's study guides

S4 — Brakes

60 questions (50 scored) in 75 minutes · 3 content areas · 73 tasks · ASE School Bus Study Guide (2026)

Covers: Air Brakes Diagnosis and Repair · Hydraulic Brakes Diagnosis and Repair · Antilock Brake System (ABS), Automatic Traction Control (ATC), Electronic Stability Control (ESC), and Collision Warning/Avoidance System Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Air Brakes Diagnosis and Repair	34
B Hydraulic Brakes Diagnosis and Repair	10
C Antilock Brake System (ABS), Automatic Traction Control (ATC), Electronic Stability Control (ESC), and Collision Warning/Avoidance System Diagnosis and Repair	6
Total	50

The full S4 task list, with 206 practice questions · ASE's study guides

S5 — Suspension and Steering

60 questions (50 scored) in 75 minutes · 4 content areas · 59 tasks · ASE School Bus Study Guide (2026)

Covers: Steering System Diagnosis and Repair · Suspension Systems Diagnosis and Repair · Wheel Alignment Diagnosis, Adjustment, and Repair · Wheels and Tires Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A Steering System Diagnosis and Repair	18
B Suspension Systems Diagnosis and Repair	18
C Wheel Alignment Diagnosis, Adjustment, and Repair	8
D Wheels and Tires Diagnosis and Repair	6
Total	50

The full S5 task list, with 183 practice questions · ASE's study guides

S6 — Electrical/Electronic Systems

55 questions (45 scored) in 90 minutes · 7 content areas · 61 tasks · ASE School Bus Study Guide (2026)

Covers: General Electrical/Electronic System Diagnosis · Low-Voltage Battery Diagnosis and Service · Starting System Diagnosis and Repair · Low-Voltage Charging System Diagnosis and Repair · Lighting Systems Diagnosis and Repair · Gauges and Instrument Warning Devices Diagnosis and Repair · Miscellaneous

Test specifications: questions by content area

Content area	Questions in test
A General Electrical/Electronic System Diagnosis	6
B Low-Voltage Battery Diagnosis and Service	4
C Starting System Diagnosis and Repair	6
D Low-Voltage Charging System Diagnosis and Repair	7
E Lighting Systems Diagnosis and Repair	12
F Gauges and Instrument Warning Devices Diagnosis and Repair	4
G Miscellaneous	6
Total	45

The full S6 task list, with 199 practice questions · ASE's study guides

S7 — Air Conditioning Systems and Controls

50 questions (40 scored) in 60 minutes · 3 content areas · 37 tasks · ASE School Bus Study Guide (2026)

Covers: A/C System Diagnosis and Repair · A/C System Component Diagnosis and Repair · Operating Systems and Related Controls Diagnosis and Repair

Test specifications: questions by content area

Content area	Questions in test
A A/C System Diagnosis and Repair	16
B A/C System Component Diagnosis and Repair	14
C Operating Systems and Related Controls Diagnosis and Repair	10
Total	40

The full S7 task list, with 173 practice questions · ASE's study guides

Alternate Fuels

F1 — Compressed Natural Gas Vehicle

65 questions (55 scored) in 90 minutes · 6 content areas · 49 tasks · ASE Compressed Natural Gas Vehicles Test Study Guide (2026)

Covers: Pre-Service Vehicle Inspection · CNG System Equipment Inspection · Leak Testing and Repairs · Emissions and Performance Verification · System Diagnosis, Maintenance, and Repair · General Cylinder Safety and Maintenance

Test specifications: questions by content area

Content area	Questions in test
A Pre-Service Vehicle Inspection	5
B CNG System Equipment Inspection	8
C Leak Testing and Repairs	6
D Emissions and Performance Verification	11
E System Diagnosis, Maintenance, and Repair	16
F General Cylinder Safety and Maintenance	9
Total	55

The full F1 task list, with 182 practice questions · ASE's study guides

xEV

xEV — xEV High-Voltage Electrical Safety (Levels 1 and 2)

ASE Electrified Propulsion Vehicles (xEV) High-Voltage Electrical Safety Standards, Level TWO, Version 2.1 (2025) · 6 sections · 60 subsections

Covers: Purpose and Definitions · General Requirements for Electrical Safety-Related Work Practices · Establishing an Electrically Safe Work Condition · Safety-Related Work Practices · De-Energizing · Test Instruments and Equipment for Electric Vehicle Applications

This outline is the table of contents of ASE's xEV High-Voltage Electrical Safety Standards, Level TWO, which includes every Level ONE section. The full outline, with 196 practice questions

Questions about the ASE task lists

Where do I find the ASE task lists?

In ASE's official study guides, PDFs you can download from ASE's study guides page at ase.com. Each guide holds the Test Specifications and Task List for its tests. This page gives the content areas and question counts for 43 of those tests, and each test's practice page here has its full task list - 3,230 tasks in all - plus the outline of ASE's xEV high-voltage safety standards.

Are the ASE tests based on the task lists?

Yes. ASE's study guides say so directly: “Every question on the test represents one or more of these tasks, although some tasks may not appear on the version of the test that you see.”

What is the difference between the test specifications and the task list?

In ASE's words, the Test Specifications “list the main content covered by each test and the number of test questions devoted to each topic”, and the Task Lists “spell out the technical knowledge and skills required for success on the test”. The specifications say how many questions each content area gets; the task list says what you need to know to answer them.

How many questions are on an ASE test?

50 to 65, depending on the test, in 60 to 150 minutes. 40 to 55 of them are scored; the other 10 are unscored research questions. Each test's own numbers are with its task list below.

How should I use the task list to study?

ASE's advice is to “use the Task List to identify weak areas and to select learning resources”. Go through your test's list task by task: anything you can't explain or do is the next thing to study, and the specifications show where most of the questions are.

How current are these task lists?

They come from ASE's 2026 study guides, read on October 20, 2026. Each guide is dated, and the PDFs on ase.com are always the current word.

Keep going

Every practice test — ASE, EVT, EPA 609, Cummins and Detroit.
EVT learning objectives for every exam — the same idea for the EVT fire, ambulance and ARFF tests.
ASE's study guides page — the official PDFs, with sample questions for each test.

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The specifications and task lists here and on each practice page are ASE's, reproduced from its published study guides so they can be read in one place. Overhaul Prep is independent and is not affiliated with or endorsed by ASE.