Practice Test Geeks(AERA) Automotive Engine Rebuilders Association Certification Practice Test
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Component Inspection & Quality Control Flashcards

7 cards from real AERA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Component Inspection & Quality Control flashcards as text

  1. A cylinder head surface that shows low spots when checked with a straight edge and feeler gauge requires:

    Answer: Resurfacing to restore flatness

    Low spots indicate warpage; resurfacing (milling or grinding the deck) removes material to restore a flat sealing surface within specification.

  2. The maximum allowable warpage for a typical V8 engine cylinder head deck surface is often specified as:

    Answer: 0.004 in (0.10 mm) overall or 0.002 in per 6 in

    Most OEM specifications limit warpage to approximately 0.004 in overall or 0.002 in per any 6-inch span to ensure proper head gasket sealing.

  3. When inspecting valve seats, a seat that is too wide will cause:

    Answer: Poor heat transfer from the valve face and valve burning

    Overly wide seats reduce the contact pressure per unit area, impeding heat transfer from the valve to the head, which can cause the valve to overheat and burn.

  4. What does excessive end play in a crankshaft indicate?

    Answer: Worn or damaged thrust bearings/washers

    Crankshaft end play is controlled by thrust bearings or thrust flanges; worn thrust surfaces allow excessive axial movement of the crankshaft.

  5. A technician finds that a block's main bearing tunnel measures 0.003 in larger in diameter than specification. The BEST corrective action is:

    Answer: Line bore or line hone the block to restore proper geometry, then use correct bearings

    An oversized main tunnel must be line bored or line honed back to the correct diameter and roundness before installing bearings of the proper size.

  6. Which surface finish characteristic is most critical for proper piston ring seating in a honed cylinder bore?

    Answer: Roughness average (Ra) and crosshatch angle

    The correct Ra (surface roughness) and a crosshatch angle of 45–60° provide the proper oil retention and ring seating characteristics for new rings.

  7. When performing a wet compression test and results improve significantly compared to a dry test, this indicates:

    Answer: Worn or damaged piston rings

    Oil added to the cylinder temporarily seals worn rings; a big improvement from dry to wet test confirms ring and/or bore wear as the source of low compression.