ASVAB Diagnostic Test

Part 7: Auto and Shop Information (AS)

11 Minutes 25 Questions

  1. Directions: In this section, you will be tested on your knowledge of automotive and shop basics. For each question, select the best answer and mark the corresponding oval on your answer sheet.

  2. High-intensity ultraviolet light is generated during .
    1. welding
    2. sawing
    3. soldering
    4. drilling
  3. Most drill bits are made to cut when
    1. rotating to the right when viewed from the top
    2. rotating to the left when viewed from the top
    3. rotating to the right when viewed from the bottom
    4. oscillating
  4. A motor oil with a prefix for its quality rating would be suited for a diesel engine.
    1. CD
    2. SA
    3. SJ
    4. DM
  5. Coil-on-plug ignition systems eliminate the need for
    1. secondary coil winding
    2. spark plug wires
    3. spark plugs
    4. primary coil winding
  6. A DOHC V-8 engine would have a total of camshafts.
    1. two
    2. three
    3. four
    4. eight
  7. What type of file is depicted below?
    image
    1. smoothing file
    2. bastard file
    3. round rasp
    4. flat rasp
  8. Cutting torches use a mixture of to produce a high-temperature flame.
    1. nitrogen and acetylene
    2. nitrogen and oxygen
    3. acetylene and helium
    4. acetylene and oxygen
  9. All cars are currently being built with electrical systems.
    1. direct current
    2. alternating current
    3. negative ground
    4. both direct and alternating current
  10. As lead-acid batteries discharge, their electrolyte gradually turns to
    1. sulphuric acid
    2. water
    3. lead peroxide
    4. none of the above
  11. The camshaft turns at the speed of the engine’s crankshaft.
    1. one-half
    2. one-fourth
    3. twice
    4. triple
  12. An outside micrometer can be used to measure all of the following EXCEPT
    1. the distance between two wooden posts
    2. the thickness of flat objects
    3. the outside diameter of small cylindrically shaped objects
    4. the outside diameter of small spherical objects
  13. Which of the following is the most common type of pliers?
    1. image
    2. image
    3. image
    4. image
  14. What type of saw is depicted below?
    image
    1. rip saw
    2. crosscut saw
    3. coping saw
    4. back saw
  15. Engine temperature is controlled by the
    1. electrical system
    2. water pump
    3. radiator
    4. thermostat
  16. This image depicts what stroke in the four-stroke cycle?
    image
    1. intake stroke
    2. compression stroke
    3. power stroke
    4. exhaust stroke
  17. The three elements needed to initiate combustion are
    1. air, light, and fuel
    2. air, fuel, and an ignition source
    3. air, compression, and an ignition source
    4. air, heat, and compression
  18. A four-cylinder engine’s firing order always starts with cylinder number
    1. 1
    2. 2
    3. 4
    4. 8
  19. cylinders will fire in one revolution of a six-cylinder engine.
    1. Two
    2. Three
    3. Four
    4. Eight
  20. Which of the following is the LEAST likely to be found in an auto mechanic’s toolbox?
    1. image
    2. image
    3. image
    4. image
  21. Most solders are an alloy of .
    1. tin and copper
    2. tin and lead
    3. copper and lead
    4. brass and copper
  22. A lead-acid battery has lead plates immersed in electrolyte composed of and water.
    1. citric acid
    2. hydrochloric acid
    3. carbolic acid
    4. sulphuric acid
  23. The starter motor’s drive gear engages with the engine’s
    1. flywheel ring gear
    2. crankshaft
    3. vibration damper
    4. timing chain
  24. Sockets come in both point designs
    1. 6 and 12
    2. 7 and 13
    3. 5 and 10
    4. 1 and 2
  25. The stoichiometric, or ideal, air-fuel ratio is
    1. 10:1
    2. 17:1
    3. 14.7:1
    4. 17:4.2
  26. With disc brakes, the rotates with the vehicle’s wheels.
    1. brake rotor
    2. brake caliper
    3. brake drum
    4. wheel cylinder