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Questions and Answers
What position should the propeller control be in during the entire engine warm-up process?
What position should the propeller control be in during the entire engine warm-up process?
What should be observed when adjusting the carburetor mixture control toward the idle cutoff position?
What should be observed when adjusting the carburetor mixture control toward the idle cutoff position?
What is the expected outcome when the idle mixture is adjusted correctly?
What is the expected outcome when the idle mixture is adjusted correctly?
Why is adjusting the idle mixture considered critical?
Why is adjusting the idle mixture considered critical?
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What should be done to maintain normal cylinder head temperatures while adjusting the idle mixture?
What should be done to maintain normal cylinder head temperatures while adjusting the idle mixture?
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What is the primary purpose of draining the main line strainer during preflight inspections?
What is the primary purpose of draining the main line strainer during preflight inspections?
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In reciprocating engine lubrication systems, which classification involves storing oil in a reservoir inside the engine?
In reciprocating engine lubrication systems, which classification involves storing oil in a reservoir inside the engine?
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Why is it important to check for particles of rubber in the sediment during fuel system inspections?
Why is it important to check for particles of rubber in the sediment during fuel system inspections?
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What does the dry sump lubrication system do differently from the wet sump system?
What does the dry sump lubrication system do differently from the wet sump system?
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What should be done with the main line strainer’s screen according to maintenance protocols?
What should be done with the main line strainer’s screen according to maintenance protocols?
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In a reciprocating engine lubrication system, what is a primary characteristic of the 'wet sump' system?
In a reciprocating engine lubrication system, what is a primary characteristic of the 'wet sump' system?
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During a fuel system inspection, which of the following issues must be checked for in the gaskets?
During a fuel system inspection, which of the following issues must be checked for in the gaskets?
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What should be done with the clamp when it is being tightened without the available wrench?
What should be done with the clamp when it is being tightened without the available wrench?
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What is a common maintenance requirement for main line strainers outlined in inspections?
What is a common maintenance requirement for main line strainers outlined in inspections?
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Why is the dry sump lubrication system typically preferred in many aircraft engines?
Why is the dry sump lubrication system typically preferred in many aircraft engines?
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What is the main cause of spark plug fouling during engine operation?
What is the main cause of spark plug fouling during engine operation?
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What action should be taken to ensure idle speed adjustment is effective?
What action should be taken to ensure idle speed adjustment is effective?
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During carburetor adjustment, how is the desired idling speed achieved?
During carburetor adjustment, how is the desired idling speed achieved?
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Which of the following is NOT a part of fuel system inspection?
Which of the following is NOT a part of fuel system inspection?
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What should be the condition of filters or screens in the fuel system?
What should be the condition of filters or screens in the fuel system?
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How often should an examination of the fuel system include checking for leaks?
How often should an examination of the fuel system include checking for leaks?
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Which screw adjustment method is commonly used to control idle RPM in some carburetors?
Which screw adjustment method is commonly used to control idle RPM in some carburetors?
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What indicates that proper torque is applied to hose clamps during inspection?
What indicates that proper torque is applied to hose clamps during inspection?
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Which action is essential to verify after adjusting the idle speed?
Which action is essential to verify after adjusting the idle speed?
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What should be checked to ensure proper operation of the entire fuel system?
What should be checked to ensure proper operation of the entire fuel system?
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What is the main advantage of using a pressure lubrication system in aircraft engines?
What is the main advantage of using a pressure lubrication system in aircraft engines?
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Which of the following statements about splash lubrication systems is correct?
Which of the following statements about splash lubrication systems is correct?
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What is a critical requirement for lubrication systems in aircraft?
What is a critical requirement for lubrication systems in aircraft?
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What kind of lubrication system typically uses an external oil supply tank?
What kind of lubrication system typically uses an external oil supply tank?
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Which component is NOT part of a typical dry sump oil system in a reciprocating engine?
Which component is NOT part of a typical dry sump oil system in a reciprocating engine?
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Why is it necessary for an oil tank to have expansion space?
Why is it necessary for an oil tank to have expansion space?
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What construction material is typically used for aircraft oil tanks?
What construction material is typically used for aircraft oil tanks?
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How do foam issues in oil tanks get addressed in aircraft lubrication systems?
How do foam issues in oil tanks get addressed in aircraft lubrication systems?
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Which feature helps to ensure proper ventilation of oil tanks in aircraft?
Which feature helps to ensure proper ventilation of oil tanks in aircraft?
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What is a common method to monitor oil quantity in aircraft?
What is a common method to monitor oil quantity in aircraft?
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Why are baffles used in oil tanks?
Why are baffles used in oil tanks?
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What specifies the required oil tank capacity for aircraft?
What specifies the required oil tank capacity for aircraft?
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During which condition must oil lubrication systems maintain functionality?
During which condition must oil lubrication systems maintain functionality?
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What should be done immediately upon removing a downdraft carburetor?
What should be done immediately upon removing a downdraft carburetor?
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What type of injection system does the Continental TCM injector system use?
What type of injection system does the Continental TCM injector system use?
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Which component is NOT part of the Bendix Precision injector system?
Which component is NOT part of the Bendix Precision injector system?
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What should be verified before installing a carburetor onto an engine?
What should be verified before installing a carburetor onto an engine?
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What type of pump is used in the Continental TCM injector system?
What type of pump is used in the Continental TCM injector system?
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What is the purpose of the bleed hole in the carburetor mounting pad gasket?
What is the purpose of the bleed hole in the carburetor mounting pad gasket?
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What is the primary reason to lockwire the throttle valves during installation?
What is the primary reason to lockwire the throttle valves during installation?
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What should be checked during the rigging of the carburetor controls?
What should be checked during the rigging of the carburetor controls?
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What indicates that the preservative oil has been flushed from the carburetor?
What indicates that the preservative oil has been flushed from the carburetor?
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Which of the following is NOT a step in adjusting the mixture control mechanism?
Which of the following is NOT a step in adjusting the mixture control mechanism?
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How long should the carburetor be allowed to stand filled with fuel during installation?
How long should the carburetor be allowed to stand filled with fuel during installation?
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What should follow after bolting the carburetor to the engine?
What should follow after bolting the carburetor to the engine?
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What is necessary when installing a carburetor with diaphragms?
What is necessary when installing a carburetor with diaphragms?
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What is the consequence of excessively rich idle mixtures during engine operation?
What is the consequence of excessively rich idle mixtures during engine operation?
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Before adjusting the idle mixture, which step should be completed for optimal results?
Before adjusting the idle mixture, which step should be completed for optimal results?
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Which of the following procedures is NOT recommended during carburetor removal?
Which of the following procedures is NOT recommended during carburetor removal?
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What must be ensured regarding the carburetor's gasket before installation?
What must be ensured regarding the carburetor's gasket before installation?
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What should be done to the carburetor before connecting the fuel lines post-installation?
What should be done to the carburetor before connecting the fuel lines post-installation?
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Which adjustment should always be checked for freedom of movement before connecting control cables?
Which adjustment should always be checked for freedom of movement before connecting control cables?
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During the installation of a carburetor, what should be avoided to prevent contamination?
During the installation of a carburetor, what should be avoided to prevent contamination?
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What is the purpose of the eccentric screw found on some carburetors?
What is the purpose of the eccentric screw found on some carburetors?
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Which of the following practices should be followed when adjusting the throttle controls?
Which of the following practices should be followed when adjusting the throttle controls?
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What should be done immediately after removing the carburetor to prevent contamination?
What should be done immediately after removing the carburetor to prevent contamination?
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When should the fuel boost pump be turned on during carburetor installation?
When should the fuel boost pump be turned on during carburetor installation?
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What characteristic must be maintained for mixture controls incorporating manual types?
What characteristic must be maintained for mixture controls incorporating manual types?
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Which component should be installed to reduce the chance of foreign objects entering the induction system?
Which component should be installed to reduce the chance of foreign objects entering the induction system?
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During the adjustment of carburetor controls, which of the following should be avoided?
During the adjustment of carburetor controls, which of the following should be avoided?
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Study Notes
Reciprocating Engine
- Reciprocating engines are a type of internal combustion engine.
- They use a piston that moves back and forth inside a cylinder.
- This reciprocating motion creates power.
Carburetor Maintenance
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Procedures for removing carburetors are similar in most cases.
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Ensure the fuel shutoff valve is closed.
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Disconnect throttle and mixture linkages.
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Lockwire the throttle valve in the closed position.
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Disconnect the fuel inlet line, vapor return lines, gauge lines, and primer lines.
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Do not alter the rigging of throttle and mixture controls if reinstalling same carburetor.
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Remove air scoop and gaskets.
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Remove nuts and washers from carburetor mounting to the engine before removing the carburetor.
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Use extreme care to avoid dropping foreign objects into the engine when removing a downdraft carburetor.
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Install a protective cover on the mounting flange immediately after removing a downdraft carburetor.
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Install the carburetor and torque the bolts to the values specified in the appropriate maintenance manual.
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Ensure all shipping plugs are removed from the carburetor openings.
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Remove protective covers from the carburetor.
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Place the carburetor mounting flange gasket in position on the mounting flange.
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Inspect induction passages for foreign material to ensure safe installation.
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Close and lockwire the throttle valves in the closed position when carburetor is in its position.
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Place the carburetor deck screen in position to avoid foreign objects entering the induction system.
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Connect the fuel lines and fill carburetor with fuel.
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For diaphragms in control of fuel flow, turn on the fuel boost pump and move the mixture control from the idle cutoff position to rich.
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Continue flow until oil-free fuel is seen from the drain.
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Turn off the fuel flow, plug the fuel inlet and vapor vent outlets.
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Allow the carburetor to stand filled with fuel for at least 8 hours to soften diaphragms to original condition for best calibration.
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Tighten the carburetor mounting bolts to the specified torque limits.
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Check the throttle and mixture control lever movement for any restriction.
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Check that springback on the throttle quadrant is equal for both full open and full close positions in the aircraft.
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Correct any loose linkages, cables, or play.
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Ensure that the mixture controls go from stop-to-stop when the carburetor is adjusted.
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Check for complete travel of each control adjusting mechanism.
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Adjust mixture control mechanism when necessary during carburetor/fuel metering equipment installation.
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Verify proper operation with manual type mixture controls for proper amount of travel with springback to lean and rich.
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Determine and correct operations of idle quality issues that may arise on the engine as it’s operated.
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For a stable idle operation, warm up the engine until oil and cylinder head temperatures are normal - and maintain the appropriate propeller speed setting throughout.
Fuel System Inspection and Maintenance
- Verify the conformity of the fuel system to its design requirements.
- Check for wear, damage, and leaks.
- Confirm secure attachment and proper safety of all the units.
- Inspect components for corrosion, security of attachment, and fitting.
- Check lines and fittings for leaks and proper tightening.
- Remove and clean the strainer screens.
- Examine the sediment removed from the housing.
- Check for damaged gaskets and hose deterioration.
Reciprocating Engine Lubrication Systems
- Reciprocating engine lubrication systems can have either a wet sump or dry sump system.
- A wet-sump lubrication system has a reservoir inside the engine crankcase.
- A dry-sump system has a separate oil tank outside the engine for storing the oil.
- Both systems use a scavenge pump to circulate lubricate oil through the engine parts.
- Oil tanks for dry sump systems must be large enough to hold oil for use during operation and must also allow for expansion without overflowing.
- The main outlet from the tank should be in the form of a standpipe in order to provide a continuous supply reserve in case of engine failure.
- The return line in the top of the tank should be positioned so it discharges the returned oil against the wall of the tank in a swirling motion to minimize oil foaming in the system.
- Separate oil tanks are needed for a dry system, as some larger aircraft systems have a system that displays oil quantity during flight in the form of an arm and float mechanism that is connected to a cockpit gauge that displays quantity of oil.
- Oil tanks are usually located close to the engine at a higher point than the scavenge/oil pump inlet to allow for gravity feed.
- Oil tanks should have expansion space to account for increased oil volume. It is the larger of either 10% of the tank capacity or 0.5 gallons, whichever is greater.
- The main outlet from the tank may be in the form of a standpipe to ensure proper tank reserve supply for situations like engine failure to the oil control propellers.
- Oil tanks should have a drain in the filler cap well for any overflow during the filling operation.
- Oil tank vent lines are needed to help with proper tank ventilation in all flight attitudes.
- The vents are normally connected to the crankcase to prevent loss of oil through the vent into the atmosphere.
- Combination splash and pressure-type lubrication is the main method used on most aircraft engines for delivering oil to parts of the engine.
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Description
This quiz covers the fundamental concepts of reciprocating engines, including their operation and components. Additionally, it delves into the maintenance procedures for carburetors, highlighting essential steps for removal and installation. Test your knowledge on these crucial aspects of internal combustion engines.
