• 53 questions

NOCTI Auto Practice Tests

Unofficial practice for NOCTI Automotive Technician-Core: engines, drivetrain, steering, brakes, electrical, air conditioning and shop work.

Why is the coolant in an engine cooling system kept above atmospheric pressure?

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Exam mode: 53 questions, 57 minutes.

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Unofficial practice questions, not affiliated with NOCTI. Bank checked October 13, 2026.

Next step Next: ASE G1 maintenance and light repairASE automobile tests A1 to A8

All 53 questions

Engine Repair 3

  • What does antifreeze do when it is added to the water in a cooling system? Wikipedia, Antifreeze. Written to NOCTI Automotive Technician-Core (4409), Engine Repair
  • What does motor oil mainly do? Wikipedia, Motor oil. Written to NOCTI Automotive Technician-Core (4409), Engine Repair
  • Why is the coolant in an engine cooling system kept above atmospheric pressure? Wikipedia, Radiator (engine cooling), Coolant pressure. Written to NOCTI Automotive Technician-Core (4409), Engine Repair

Automatic Transmission and Transaxle 3

  • How does a continuously variable transmission (CVT) differ from a conventional automatic? Wikipedia, Continuously variable transmission. Written to NOCTI Automotive Technician-Core (4409), Automatic Transmission and Transaxle
  • In a parallel hybrid drivetrain, what can drive the car? Wikipedia, Hybrid vehicle drivetrain, Parallel hybrid. Written to NOCTI Automotive Technician-Core (4409), Automatic Transmission and Transaxle
  • What does the lock-up function of a torque converter do? Wikipedia, Torque converter. Written to NOCTI Automotive Technician-Core (4409), Automatic Transmission and Transaxle
Show all 53 questions (47 more)

Manual Drive Train and Axles 5

  • In a dry clutch, what does the friction disc press against to carry engine power? Wikipedia, Clutch, Dry clutch. Written to NOCTI Automotive Technician-Core (4409), Manual Drive Train and Axles
  • What do synchromesh mechanisms do in a modern manual transmission? Wikipedia, Manual transmission. Written to NOCTI Automotive Technician-Core (4409), Manual Drive Train and Axles
  • What does the differential in a drive axle allow? Wikipedia, Differential (mechanical device). Written to NOCTI Automotive Technician-Core (4409), Manual Drive Train and Axles
  • What is a transfer case? Wikipedia, Transfer case. Written to NOCTI Automotive Technician-Core (4409), Manual Drive Train and Axles
  • What is the job of the flexible boot on a CV joint? Wikipedia, Constant-velocity joint, CV boots and lubrication. Written to NOCTI Automotive Technician-Core (4409), Manual Drive Train and Axles

Suspension and Steering 7

  • An indirect TPMS has no pressure sensors in the wheels. What does it use to spot an under-inflated tire? Wikipedia, Tire-pressure monitoring system, Indirect TPMS. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • The fronts of both front wheels point toward the centerline of the vehicle. What is this setting called? Wikipedia, Toe (automotive). Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • In a metric tire size, what does the number after the slash give? Wikipedia, Tire code, Aspect ratio. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • Viewed from the front, the top of a wheel leans outward, away from the vehicle. What is this called? Wikipedia, Camber angle. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • What does caster angle give the steering? Wikipedia, Caster angle, Positive caster angle. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • What is the purpose of tire rotation? Wikipedia, Tire rotation. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering
  • What symptom does an out-of-balance wheel and tire usually cause? Wikipedia, Tire balance. Written to NOCTI Automotive Technician-Core (4409), Suspension and Steering

Brakes 7

  • Glycol-ether brake fluids such as DOT 3 and DOT 4 are hygroscopic. What does that mean? Wikipedia, Brake fluid, Boiling point. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • How does a disc brake create friction? Wikipedia, Disc brake. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • What does an anti-lock braking system do during hard braking? Wikipedia, Anti-lock braking system. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • What does electronic stability control do when it detects loss of steering control? Wikipedia, Electronic stability control. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • What does the brake master cylinder do? Wikipedia, Master cylinder. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • What is the self-energizing action of a drum brake? Wikipedia, Drum brake, Self-applying characteristic. Written to NOCTI Automotive Technician-Core (4409), Brakes
  • Why are hydraulic brakes bled? Wikipedia, Brake bleeding. Written to NOCTI Automotive Technician-Core (4409), Brakes

Electrical and Electronic Systems 8

  • A low-beam circuit draws 10 A with 12 V at the source. What is the resistance of the circuit? Wikipedia, Ohm's law. Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems; the arithmetic was worked twice
  • How many cells does a 12-volt automobile battery have? Wikipedia, Automotive battery, Design. Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • What do automotive fuses protect? Wikipedia, Fuse (automotive). Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • What does the alternator do while the engine is running? Wikipedia, Alternator (automotive). Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • What does the solenoid on a starter do? Wikipedia, Starter (engine). Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • What is a CAN bus used for in a vehicle? Wikipedia, CAN bus. Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • What is an automotive starting battery designed to deliver? Wikipedia, Automotive battery. Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems
  • Which component is an electrically operated switch, with input terminals for a control signal and a set of contact terminals? Wikipedia, Relay. Written to NOCTI Automotive Technician-Core (4409), Electrical and Electronic Systems

Heating and Air Conditioning 4

  • In the air conditioning cycle, where does refrigerant vapor from the evaporator go next? Wikipedia, Automotive air conditioning, Operating principles. Written to NOCTI Automotive Technician-Core (4409), Heating and Air Conditioning
  • Under the federal rule, who may service the refrigerant in a motor vehicle air conditioner for pay? 40 CFR 82.34 (ecfr.gov). Written to NOCTI Automotive Technician-Core (4409), Heating and Air Conditioning
  • What flows through the heater core to warm the cabin air? Wikipedia, Heater core. Written to NOCTI Automotive Technician-Core (4409), Heating and Air Conditioning
  • Which refrigerant replaced R-12 in automotive air conditioning in the mid-1990s? Wikipedia, Automotive air conditioning, R-12. Written to NOCTI Automotive Technician-Core (4409), Heating and Air Conditioning

Engine Performance 8

  • An oxygen sensor reads about 0.9 volts. What does that say about the mixture? Wikipedia, Oxygen sensor. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • How does exhaust gas recirculation (EGR) work? Wikipedia, Exhaust gas recirculation. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • How many pins does the standard OBD-II diagnostic connector have? Wikipedia, On-board diagnostics, OBD-II diagnostic connector. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • What do modern OBD systems provide through a standardized port? Wikipedia, On-board diagnostics. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • What does a mass airflow (MAF) sensor measure? Wikipedia, Mass flow sensor. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • What does a three-way catalytic converter do that a two-way converter does not? Wikipedia, Catalytic converter. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • What is engine knocking? Wikipedia, Engine knocking. Written to NOCTI Automotive Technician-Core (4409), Engine Performance
  • What is the stoichiometric air-fuel ratio for gasoline? Wikipedia, Air-fuel ratio, Engine management systems. Written to NOCTI Automotive Technician-Core (4409), Engine Performance

Customer Relations and Shop Procedures 8

  • A job pays 1.8 flat-rate hours and the shop labor rate is $110 an hour. What is the labor charge on the estimate? Written to the NOCTI Job Ready Credential Blueprint for Automotive Technician-Core (4409), Customer Relations and Shop Procedures; the answer is arithmetic on the numbers in the question, worked twice
  • A load has just been raised with a jack. What does the OSHA jack rule require next? OSHA, 29 CFR 1910.244. Written to NOCTI Automotive Technician-Core (4409), Customer Relations and Shop Procedures
  • A repair order lists 2.5 hours of labor at $96 an hour and $140 in parts, before tax. What is the subtotal? Written to the NOCTI Job Ready Credential Blueprint for Automotive Technician-Core (4409), Customer Relations and Shop Procedures; the answer is arithmetic on the numbers in the question, worked twice
  • How many pictograms does the OSHA Hazard Communication Standard designate for the labels of hazardous chemicals? OSHA, 29 CFR 1910.1200. Written to NOCTI Automotive Technician-Core (4409), Customer Relations and Shop Procedures
  • How must a shop mark the containers and tanks in which it stores used oil? 40 CFR 279.22 (ecfr.gov). Written to NOCTI Automotive Technician-Core (4409), Customer Relations and Shop Procedures
  • Parts on a work order total $150 and labor is $200. A 6% sales tax applies to the parts only. What is the total? Written to the NOCTI Job Ready Credential Blueprint for Automotive Technician-Core (4409), Customer Relations and Shop Procedures; the answer is arithmetic on the numbers in the question, worked twice
  • What is a torque wrench used for? Wikipedia, Torque wrench. Written to NOCTI Automotive Technician-Core (4409), Customer Relations and Shop Procedures
  • Which position of a vehicle identification number (VIN) holds the check digit? 49 CFR 565.15 (ecfr.gov). Written to NOCTI Automotive Technician-Core (4409), Customer Relations and Shop Procedures

How this list was compiled: Our own questions, written to the competency list of the Job Ready Credential Blueprint for Automotive Technician-Core (code 4409, version 01, copyright 2022) that NOCTI publishes at https://www.nocti.org/wp-content/uploads/Blueprints/JRAutoTechCore4409.pdf , read 2026-10-13: a written assessment of 168 questions in 3 hours over nine areas (Engine Repair 5%; Automatic Transmission and Transaxle 5%; Manual Drive Train and Axles 10%; Suspension and Steering 14%; Brakes 13%; Electrical and Electronic Systems 16%; Heating and Air Conditioning 7%; Engine Performance 15%; Customer Relations and Shop Procedures 15%), plus a performance assessment of six jobs. This bank holds 53 in those proportions. The Teacher assessment, Automotive Technician (code 5362), prints the same nine areas and weights. Every rule and definition was read on 2026-10-13 on the public page named under its question: Wikipedia, federal rules at ecfr.gov (40 CFR 82.34, 40 CFR 279.22, 49 CFR 565.15) and OSHA standards on osha.gov. Every price, hour and reading is made up for the drill, and each computed answer is arithmetic that was worked twice. Licence: Questions, choices and explanations are original work of this site.

How it works

This free NOCTI automotive practice test is unofficial: 53 questions of our own under the nine areas of the Job Ready Automotive Technician-Core blueprint, code 4409. It is not affiliated with NOCTI, nor endorsed or sponsored by it.

Read the full guide

How the nine areas are weighted

Electrical and Electronic Systems is 16% of the written assessment. Engine Performance and Customer Relations and Shop Procedures are 15% each, Suspension and Steering 14%, Brakes 13%, Manual Drive Train and Axles 10%, Heating and Air Conditioning 7% and Engine Repair and Automatic Transmission and Transaxle 5% each.

A little over a minute apiece

The real test allows a little over a minute a question. Fifty-three questions at that rate come to 57 minutes. The blueprint sets no pass mark.

Left to the shop

Six performance jobs are scored in the shop and are not practiced here.

  • Camber is the lean of the wheel seen from the front. Toe is where the fronts of the wheels point. Caster helps the steering self-center.
  • A repair order subtotal is labor hours times the labor rate, plus parts. Tax is added where it applies.

Questions and answers

How many questions are on the NOCTI automotive test?

Automotive Technician-Core, code 4409, has 168 written questions. Its blueprint sets 3 hours for them, in one sitting or split over two or three, and 2 hours and 40 minutes more for six shop jobs.

Is there a NOCTI Teacher test for automotive technicians?

There is: Automotive Technician, code 5362. Area for area and weight for weight it matches the Core blueprint, with 168 questions, 3 hours and the same six shop jobs.

What is on the performance part of the NOCTI automotive test?

Six jobs: Identification of Parts (5%), Disc Brake Assembly Service (27%), Battery, Starting and Charging System tests (22%), an Electronic Engine Control Component test (11%), Tire Service and Balance (15%) and a Headlight Amperage Draw Test (20%).

Where is the NOCTI automotive blueprint?

On nocti.org/credentials/blueprints, under Automotive Technician-Core. The free PDF, code 4409, holds the competency list, the nine weights, ten sample questions and a sample job on tire service and balance. This page reuses none of those samples.

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