Armed Services Vocational Aptitude Battery (ASVAB) Auto, Shop, and Assembling Objects Syllabus

Auto, Shop, and Assembling Objects syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Auto, Shop, and Assembling Objects in Armed Services Vocational Aptitude Battery (ASVAB), not a summary of it.

1. 1

   Automotive Systems (Auto Information)

   4 topics

   • Engine Fundamentals
     • Four-stroke combustion cycle
     • Engine components (pistons, valves, crankshaft)
     • Diesel vs. gasoline engines
   • Vehicle Support Systems
     • Fuel and ignition systems
     • Cooling and lubrication systems
     • Electrical and charging systems
   • Drivetrain and Chassis
     • Transmission and clutch
     • Brakes and braking systems
     • Suspension and steering
   • Vehicle Maintenance
     • Routine service and fluids
     • Diagnosing common problems
2. 2

   Shop Tools and Practices (Shop Information)

   4 topics

   • Hand Tools
     • Wrenches, sockets, and pliers
     • Screwdrivers and hammers
     • Measuring and marking tools
   • Power Tools
     • Drills, saws, and grinders
     • Sanders and routers
   • Fasteners and Materials
     • Bolts, nuts, screws, and rivets
     • Adhesives and welding basics
   • Shop Safety and Measurement
     • Personal protective equipment
     • Reading rulers and calipers
3. 3

   Assembling Objects (AO)

   3 topics

   • Connection Problems
     • Matching connection points (A and B)
     • Interpreting connecting lines
   • Puzzle and Shape Assembly
     • Visualizing reassembled shapes
     • Mentally rotating pieces
   • Spatial Reasoning Skills
     • Mental rotation and orientation
     • Eliminating impossible arrangements

Auto, Shop, and Assembling Objects flashcards for Armed Services Vocational Aptitude Battery (ASVAB)

20 of 51 cards from the Auto, Shop, and Assembling Objects deck — real questions with worked answers.

1. What are the four strokes of a four-stroke internal combustion engine, in order?

   Intake, Compression, Power (combustion), and Exhaust.

2. What is the function of the spark plug in a gasoline engine?

   It produces an electric spark that ignites the compressed air-fuel mixture in the cylinder.

3. What engine part converts the up-and-down (reciprocating) motion of the pistons into rotational motion?

   The crankshaft.

4. What connects each piston to the crankshaft?

   The connecting rod.

5. What is the difference between how a gasoline engine and a diesel engine ignite fuel?

   A gasoline engine ignites fuel with a spark plug; a diesel engine ignites fuel by the heat of high compression (compression ignition), with no spark plug.

6. What component controls the opening and closing of the intake and exhaust valves?

   The camshaft.

7. What does the timing belt or timing chain do?

   It synchronizes the rotation of the crankshaft and camshaft so the valves open and close at the correct time relative to the pistons.

8. What is the firing order of an engine?

   The sequence in which the cylinders fire (ignite), designed to balance the engine and reduce vibration.

9. What is the purpose of the engine's cooling system?

   To remove excess heat from the engine and keep it at an optimal operating temperature, preventing overheating.

10. What does the thermostat do in an engine cooling system?

    It regulates coolant flow to the radiator, staying closed until the engine warms up, then opening to maintain operating temperature.

11. What is the function of the radiator?

    It dissipates heat from the engine coolant to the air, cooling the coolant before it returns to the engine.

12. What is the main purpose of engine oil (the lubrication system)?

    To reduce friction and wear between moving parts, and to help cool, clean, and seal engine components.

13. What does the alternator do in a vehicle's electrical system?

    It generates electrical power while the engine runs, charging the battery and supplying electricity to the car's systems.

14. What is the role of the battery in a vehicle?

    It stores electrical energy and provides the current needed to start the engine and power accessories when the engine is off.

15. What does the starter motor do?

    It uses battery power to crank (turn over) the engine so it can start running.

16. What is the function of the fuel injector?

    It sprays a precise, atomized amount of fuel into the intake or cylinder for combustion.

17. What does the exhaust system's catalytic converter do?

    It reduces harmful emissions by converting toxic gases (like CO and unburned hydrocarbons) into less harmful substances.

18. What is the function of the transmission in a vehicle?

    It transfers engine power to the wheels and changes gear ratios to match speed and torque demands.

19. What is the difference between a manual and an automatic transmission?

    A manual transmission requires the driver to shift gears using a clutch; an automatic shifts gears by itself without a clutch pedal.

20. What does the clutch do in a manual transmission vehicle?

    It engages and disengages the engine from the transmission, allowing smooth gear changes.

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