Reciprocating Engine Overhaul Practice Test

These questions are part of the practice quiz. Start practicing

• In what situations is blueprinting appropriate for an overhaul?
• What is the purpose of the safety circlet on some valve stems?
• What is the decimal equivalent of the fraction 64/16?
• Which tools are used to verify valve timing during overhaul?
• In a differential-pressure check, if ring gaps are not staggered and align, what is most likely indicated?
• Which of the following should a mechanic consult to determine the maximum amount of cylinder cooling fin that may be removed when re-profiling?
• During an engine overhaul, how is proper end-gap clearance on new piston rings verified?
• If a valve seat cannot be restored, what action should be taken?
• What is the function of the oil pump relief valve and how is it tested?
• If the crankshaft runout readings on the dial indicator are plus .002 inch and minus .003 inch, the runout is
• What is honing used for after re-boring?
• Why is cylinder bore measurement performed at multiple radial positions during overhaul?
• What statement correctly describes blueprinting applicability?
• What is the purpose of the piston pin lock/retaining mechanism, and how is it checked?
• Which tool can be used to determine piston pin out-of-round wear?
• The actual time between overhauls (TBO) for an engine is determined largely by which factor?
• Which of the following statements about piston rings and cylinder finishes is true?
• Magnetic particle inspection is a suitable inspection method for which engine components?
• Connecting rod pins are normally lubricated with which arrangement?
• Full floating piston pins allow motion between the pin and which components?
• If you replace a push rod with a longer or shorter one, the reason is which of the following?
• What are the consequences of not following the torque sequence when tightening cylinder head bolts?
• After a stud is removed because it was bent, the replacement stud should be one size larger than the stud removed.
• During overhaul, why are disassembled engine parts degreased with mineral spirits solvent rather than water-mixed degreasers?
• Why is valve timing verification critical and what tools are used?
• Which of the following contains approved data for performing a major repair to an aircraft engine?
• Which statement best describes signs of a worn or defective piston ring?
• How is a compression test used to diagnose overhaul issues and what results indicate problems?
• Which engine servicing operation generally requires engine pre-oiling prior to starting the engine?
• When cleaning aluminum and magnesium engine parts, is it advisable to soak them in solutions containing soap?
• In diagnosing overhaul issues, what is the typical test sequence?
• What is the purpose of checking cylinder head and crankcase flatness, and how is it done?
• If you are replacing a push rod with one that is longer or shorter it is because which condition?
• Some piston rings have a word printed on them for installation purposes; what is the word?
• What indicates valve seat recession and how is it corrected in overhaul?
• During manifold inspection, what findings indicate the manifold may need repair or replacement?
• Crankshaft runout checks are usually performed under which conditions?
• Which statement about piston ring measurements is true?
• Scoring defects are linear (same direction) and can be found on parts that move long distances always in the same direction; like pistons.
• Which cleaning solvent is preferred for disassembled engine parts during overhaul?
• Why is proper fastener torque retention and anti-seize application important in overhaul?
• What is the role of the scraper ring in the piston ring pack?
• What is a common wear site looked for in the oil pump housing during overhaul?
• How is the oil system primed and pressure verified after overhaul?
• A hissing sound from the exhaust stacks when the propeller is being pulled through manually indicates which condition?
• A broken fin on a cylinder head may be filed smooth if damage does not exceed repair limits.
• Which condition is one of the least likely to be caused by failed engine bearings?
• How should piston pin fit be assessed, and what indicates replacement?
• How is cylinder bore out-of-round and taper measured during overhaul?
• The valve springs used in a reciprocating engine are checked for proper ____________ with the use of a valve spring compression tester.
• If an engine overhaul is mandatory for flight operations conducted by a company, who can extend the overhaul time?
• During the exhaust valve inspection you check the guides with a go-no-go gauge and the pilot has noted there has been high oil consumption, what would be the most likely finding?
• What are the common oil pump defects looked for during overhaul?
• Which statement is most likely true regarding mandatory valve replacement at overhaul?
• Which tool is used to measure valve stretch?
• What items must be recorded as part of overhaul documentation?
• During engine run-in, which parts are intended to wear in and seat properly?
• After an engine overhaul, what does normal engine break-in in the oil typically indicate?
• What is the function of the oil control ring assembly, and what issues can arise if misinstalled?
• Which of the following identifies a symptom of a defective oil pump relief valve during operation?
• Grinding the valves to a feather edge is likely to cause which outcome?
• What signs indicate crankcase damage that requires replacement or machine shop repair?
• What is the first step in a reciprocating engine overhaul and why is it critical?
• What method is used to verify crankshaft runout?
• In an engine with hydraulic lifters, when the lifters are completely flat or empty, valve clearance should not exceed which of the following?
• What is the main purpose of engine run-in?
• What is the procedure for checking dry lifter clearance?
• What bench or on-engine tests verify fuel system integrity after overhaul?
• How is camshaft wear assessed and when should replacement occur?
• Which valve is typically the one that must be replaced during overhaul?
• What readings indicate that a crankshaft should be replaced after straightness testing?
• To accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic would use a
• A gauge block is commonly used as a reference standard to check the accuracy of which instrument?
• If the oil pressure gauge fluctuates over a wide range from zero to normal operating pressure, the most likely cause is
• For engines equipped with a governor, what should be verified during post-overhaul checks?
• What checks confirm proper operation of the carburetor or fuel injection system after overhaul?
• Eddy current inspections function through the use of:
• Which factor is most likely to cause fluctuating oil pressure readings in operation?
• Which instrument is commonly used to determine crankshaft rotation in degrees?
• In crankshaft runout verification, why is a fixed datum used?
• What is the purpose of the safety circlet installed on some valve stems?
• How is connecting rod and main bearing clearance measured, and what constitutes acceptable limits?
• How is valve seat sealing quality verified after overhaul?
• Why are correct torque sequences and lubrication essential during engine reassembly?
• On which part of the cylinder walls of a normally operating engine will the greatest amount of wear occur?
• Which statement best explains why aircraft cylinder oversizes are generally smaller than automotive cylinder oversizes?
• If an oil filter element becomes completely clogged, which event occurs?
• What typical magneto issues are addressed during overhaul?
• How are crankshaft end play and bearing clearance checked during overhaul?
• To determine piston pin out-of-round wear, which tool can be used?
• Which lubrication method is normally used for lubricating connecting rod pins?
• Who is allowed to inspect and approve an engine major repair for return to service?
• How can compression ratio change during overhaul, and why is this important?
• End-gap clearance that is correct is essential to ensure?
• What is the function of the oil filter bypass in relation to unfiltered oil?
• If the radius of a piece of round stock is 45/64 inch, which decimal is most nearly equal to the diameter?
• How is the cooling system integrity verified during overhaul?
• What is the maximum acceptable size for the dimension written as 7.439 inches plus .007 inches minus .003 inches?
• What is the procedure for a leak-down test and how are results interpreted?
• What inspections are performed on valve springs during overhaul?
• If piston ring gaps are not staggered and align during a differential-pressure compression check, what is most likely indicated?
• What is the term used to describe chipping or material loss on a lifter body face?
• What cylinder bore conditions require re-boring or honing during overhaul?
• Which statement about piston rings and cylinder finishes is true?
• What procedure would you use to measure a hole about 1/4 inch in diameter?
• Piston ring measurements are taken using which type of instrument?
• Why is cam timing verification critical in overhaul and what methods are used?
• During exhaust valve inspection go-no-go gauge checks are used to assess wear on which component?
• How are exhaust and intake manifolds inspected during overhaul?
• Which practice is correct for cam timing verification after overhaul?
• Which of the following is a valid method of visual inspection?
• What is the role of service bulletins (SB) and airworthiness directives (AD) in an overhaul project?
• Why is it important to verify piston ring end gaps after resizing for a new bore?
• What type of inspection is typically used to detect hairline cracks in crankshafts and connecting rods during overhaul?
• Small hole gauges are read by using which instrument?
• Which statement is true about plain bearings?
• In engines with chromium-plated cylinders, piston rings must not be chromium-plated.
• When doing an inspection for valve stretch what tool should be used?
• How is crankshaft straightness checked and what readings indicate replacement?
• Which statement best describes typical piston ring configurations and their functions?
• Which bearing type must be continuously lubricated by pressure oil?
• Which of the following is not usually identified as a visual inspection defect?
• When reboring or fitting a new bore, how should piston rings be sized and installed?
• A blueprint dimension is written as 7.439 inches plus .007 inches minus .003 inches. What is the minimum acceptable size?
• What is the primary function of the compression rings in a piston ring pack?
• Which of the following is a primary method for verifying crankshaft bend or runout?
• What type of oil do most engine manufacturers recommend after new reciprocating engine break-in?
• Which procedure is used to check dry lifter clearance?
• Why is rotating the engine after priming oil important?
• Which data source provides the approved instructions for performing major engine repairs?
• An engine that is rebuilt must meet the same limits and tolerances specified for new parts by the engine manufacturer.
• In oil lubrication systems, the oil filter bypass opens under what condition?
• If cam surfaces show signs of wear or defects, the cam should be discarded and replaced with a new cam.
• What temperature condition should be used when measuring piston ring end gaps?
• Standard aircraft cylinder over-sizes usually range from 0.010 inch to 0.030 inch. Oversize on automobile engine cylinders may range up to 0.100 inch. This is because aircraft engine cylinders
• During manifold inspection, which finding would indicate the manifold should be repaired or replaced?
• Which tool is used to verify end-gap clearance on piston rings?
• Must valve seats be reground after valve guides are replaced? If so when?
• What consequence can occur if soap impregnates aluminum or magnesium surfaces after cleaning?
• Full floating piston pins are those which allow motion between the pin and which components?
• How is valve stem and guide wear evaluated and what is a typical limit?
• What tool do you use to measure the side clearance between the crankpin and the connecting rod?
• Visual inspection will usually reveal which of the following?
• What does excessive ring groove wear indicate during piston inspection?
• During a timing check, which parameter is measured by the timing disk?
• What parameters should be monitored during a post-overhaul run-in to assess engine health?
• After an engine overhaul, finding small copper or aluminum particles in the oil filter typically indicates what?
• Why is following the recommended torque sequence and using proper fastener lubrication critical for cylinder head bolts?
• Choked or taper-ground cylinders are used to provide what?
• Which instrument is commonly used to verify crankshaft end play?
• Why is it essential to establish engine-specific service limits (wear tolerances) before inspecting components?
• What governs acceptable piston ring end gaps and how are they checked?
• Choke bore cylinders compress the rings at the bottom of the stroke.
• The purpose of the engine run-in is to permit newly installed parts to burnish or wear in piston rings to seat against cylinder walls, and valves to become seated.
• What is the crankcase breather system, and what issues during overhaul indicate replacement?
• Which number represents the Vernier scale graduation of a micrometer?
• Which instrument would you use to measure cylinder bore size for detecting out-of-roundness and taper?
• Cylinder barrels are measured with a cylinder bore gauge. This gauge will show:
• Where in the cylinder is wear greatest during normal operation?
• Some manufacturers equip their product with choked or taper-ground cylinders in order to which purpose?
• Describe a proper cleaning procedure for engine parts prior to inspection.
• Which precision measuring instrument is used when performing a connecting rod twist inspection?
• When cylinders are chromium-plated, piston rings used in those cylinders must not be chromium-plated.
• If the oil pressure of a cold engine is higher than at normal operating temperatures, the engine's lubrication system is probably operating normally.
• Which description best reflects the end-gap specification for piston rings?
• Crankshaft bearings are generally what type?
• What records and documentation are essential to complete for an overhaul?
• How is magneto timing checked and adjusted during overhaul?
• What is the proper cylinder head torque sequence and why is it important?
• How do you determine correct piston ring orientation and end gaps during installation?
• How is piston ring end gap determined and what factors influence the correct gap?
• Which description best matches what a cylinder bore gauge reveals about a bore?
• Score lines are defects that are linear and found on parts that move long distances in the same direction, such as pistons.
• If a leak-down test shows leakage mainly through the intake valve path, what does that indicate?
• What should be documented after cleaning to support inspection findings?
• What is the primary purpose of checking flatness on cylinder head and crankcase surfaces during overhaul?
• After cleaning the crankcase and accessory gearbox, which corrosion protection method is used?
• Which of the following tools might be used to check a micrometer for accuracy?
• Visual inspection is accomplished by direct examination and with the use of a magnifying glass.