Practice Test Geeks(AERA) Automotive Engine Rebuilders Association Certification Practice Test
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Engine Rebuilding Techniques & Procedures 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 Engine Rebuilding Techniques & Procedures flashcards as text

  1. What is the purpose of a pilot bearing or bushing in the crankshaft flywheel end?

    Answer: Support the transmission input shaft nose

    The pilot bearing or bushing supports and centers the transmission or transaxle input shaft nose inside the crankshaft end.

  2. When Plastigage is used to check bearing clearance and shows a very wide, flat strip after cap removal, this indicates:

    Answer: Clearance is excessive (too much oil clearance)

    Plastigage flattens more (wider strip) when clearance is greater; a very wide strip indicates excessive oil clearance beyond specification.

  3. What does 'zero-deck' or 'decking to zero' mean in engine building?

    Answer: Machining the block so piston crown is exactly flush with the deck at TDC

    Zero-decking means machining the block surface so the piston tops are flush with (or at a specified distance from) the deck surface at TDC, maximizing compression ratio consistency.

  4. Which type of valve seat insert material is required in engines designed to run on unleaded fuel without hardened OEM seats?

    Answer: Hardened steel or sintered iron inserts

    Engines originally designed for leaded fuel need hardened steel or sintered iron seat inserts when converted to unleaded operation to prevent valve seat recession.

  5. What is the correct sequence for tightening main bearing cap bolts?

    Answer: Start at center and work outward alternately

    Main caps should be tightened starting from the center and alternating outward to distribute clamping load evenly and minimize bore distortion.

  6. A connecting rod that is twisted will cause which primary symptom?

    Answer: Piston scuffing on one side and abnormal ring wear

    A twisted rod causes the piston to rock and run cocked in the bore, producing side scuffing on the piston skirt and uneven, accelerated ring wear.

  7. What is the purpose of 'deglaze honing' a cylinder before installing new piston rings on a used engine?

    Answer: Break the mirror-smooth glaze so new rings can seat and seal quickly

    Deglazing creates a fresh crosshatch surface that allows new piston rings to bed into the bore rapidly for proper oil control and compression.