Aircraft Engine Components PDF

1. Cyl numbering 2. Major engine components 3. Piston head type 4. Types of bearings  5. Lubrication Which of the following is a purpose for an aircraft engine's oil system? #1 Increasing engine compression ratio Reducing engine maximum speed Increasing engine volumetric efficiency Reducing...

1. Cyl numbering 2. Major engine components 3. Piston head type 4. Types of bearings  5. Lubrication Which of the following is a purpose for an aircraft engine's oil system? #1 Increasing engine compression ratio Reducing engine maximum speed Increasing engine volumetric efficiency Reducing friction Which of the following is a purpose for an aircraft engine's oil system? #2 Increasing engine minimum speed Increasing engine volumetric efficiency Reducing engine maximum speed Absorbing heat Which of the following is a purpose for an aircraft engine's oil system? #3 Increasing engine maximum power Reducing engine maximum speed Sealing engine components Increasing engine thermal efficiency Which of the following is a purpose for an aircraft engine's oil system? #4 Cushioning engine parts Decreasing engine compression ratio Improving engine mid range torque Increasing engine frictional losses Which of the following is a purpose for an aircraft engine's oil system? #5 Increasing flight control rate of motion Cleaning Reducing pilot physical workload Washing dishes Which of the following is a purpose for an aircraft engine's oil system? #6 Protecting from corrosion Improving planned obsolescence Reducing friction in the flight control system Accelerating wear and corrosion 6. Cooling 1 What are engine baffles & baffle seals used for? #1 To trap air above the engine, raise it's pressure and direct it up through the engine's cooling system To trap air below the engine, raise it's pressure and direct it down through the engine's cooling system To trap air above the engine, raise it's pressure and direct it down through the engine's cooling system To trap air below the engine, raise it's pressure and direct it up through the engine's cooling system What are engine baffles & baffle seals used for? #2 To direct cooling liquids through the cooling fins on the cylinder assemblies To direct cooling air through the cooling fins on the cylinder assemblies To direct cooling water through the cooling fins on the cylinder assemblies To direct cooling air through the cooling fins on the crankcase What will happen if a baffle seal "flips over"? Cooling air will be trapped "below the engine" and engine temperatures will decrease Cooling air will be trapped "above the engine" and engine temperatures will decrease Cooling air will be lost "around the engine" and engine temperatures will increase Cooling air will be lost "around the engine" and engine temperatures will decrease 7. Cooling 2 What does a high performance piston aircraft use to control engine temperature? Fuel injection Thermostat Wing flaps Cowl flaps What is the purpose of the engine cowl? To guide air around the engine for best oil cooling To guide air around the engine for best engine cooling To guide water around the engine for best engine cooling To guide air around the tail of the aircraft for best cooling What is the purpose of the cowl flaps? To control the amount of air leaving the cowls To slow the speed of the aircraft To control the amount of air entering the cowls To reduce the stall speed of the aircraft When preparing to complete a ground run of an air-cooled piston aircraft engine, it is important to ensure that: The cowl flap(s) are in the fully open position Cowl side panels are open The cowl flap(s) are in the fully closed position Cowl flap position is not important for ground runs – it is only for flight What is typically done in extremely cold operation of aircraft engines? Winter baffles will be installed to reduce the cowl opening size Winter baffles will be installed to increase the cowl flap size Winter baffles will be installed to increase the cowl opening size Winter baffles will be installed to reduce the cowl flap size 8. Cooling 3 If an air-cooled aircraft engine uses only a single CHT probe in the CHT system, in which cylinder would the probe typically be installed? The hottest cylinder The coolest cylinder Number one cylinder Doesn’t matter-whichever is the easiest cylinder to access What do most horizontally opposed aircraft use for oil cooling? Air passing by cooling fins on the cylinder assemblies Water passing around the cylinder assemblies Air passing around the crankcase assemblies Air passing by cooling fins on the radiator assemblies Which instrument/indication is typically considered the main limiting factor for ground operation of an air-cooled, reciprocating internal combustion engine? Ammeter Voltmeter Cylinder Head Temperature (CHT) Exhaust Gas Temperature (EGT) Typical air cooled aircraft engines use what kind of cooling system? Vapor phase cooling Vacuum cooling Pressure cooling Liquid cooling Typical light aircraft engines use what kind of cooling system? Liquid diffusion cooling Air cooling Liquid cooling Vapor state cooling When does the thermostat in a liquid cooling system open? When the outside air temperature is equal to or below the engine temperature When the engine comes up to normal operating temperature When the engine is below normal operating temperatures When the engine is cold Which of the following best describes a liquid cooling system? Heat is transferred from the engine to a liquid which has the heat extracted from it by air in a radiator Heat is transferred from the engine to the radiator by conduction where the heat is extracted by air Heat is transferred from the engine to a liquid which has the heat extracted from it by another liquid in a radiator Heat is transferred from the engine to air which has the heat extracted from it by a liquid in a radiator What parts are there in a liquid cooling system? The reservoir, radiator, thermostat and water jackets The engine driven coolant pump, reservoir, radiator and water jackets The engine driven coolant pump, reservoir, radiator, thermostat and water jackets The engine driven coolant pump, radiator, thermostat and water jackets How much of an engine's cooling is provided by oil? As much as 70% As much as 30% As much as 40% As much as 50% How is engine oil cooled on an aircraft piston engine? By cooling fins on the oil reservoir By an oil to air heat exchanger By an oil to fuel heat exchanger By evaporative cooling of the oil 9. Oil temp What component controls oil temperature? The oil cooler The surge valve The vernatherm The throttle What component reduces the oil temperature? Oil cooler Cuno filter Cylinders Vernatherm What does a vernatherm do? As it warms up it closes, forcing all oil to bypass the main bearings As it warms up it opens, allowing oil to bypass the main bearings As it warms up it closes, forcing the oil through the oil cooler As it warms up it opens, forcing the oil through the oil cooler 10. Oil When are Mil-L-22851D ashless dispersant oils used in an aircraft piston engine? Only during the summer After break in until overhaul They are not used, synthetic oils are used For the initial 50 hrs after overhaul for break in When is Mil-L-60823E straight mineral oil used? As required, whenever oil pressure gets low For the initial 50 hrs after overhaul for break in After break in until overhaul Only during the summer Why is ashless dispersant oil better? It contains dispersants that will prevent sludge formation It contains anti-wear and anti-foaming additives All of the above It does not generate ash that will contain metal particles What is a disadvantage of synthetic oil? Breaks down easily at high temperatures Low viscosity at high temperatures Tends to blister paint High viscosity at low temperatures What is a disadvantage of synthetic oil? High viscosity at low temperatures Increased sludging tendancey Low viscosity at high temperatures Breaks down easily at high temperatures What is the problem with using mineral oil? Tends to foam when aerated by agitation Tends to foam when exposed to contaminants Tends to breakdown when used at low temperatures Tends to overly contaminate the combustion chamber What is the most commonly used type of aircraft piston engine oil? Mineral based Synthetic oils Semi-synthetic oils Castor oils Why do aircraft piston engines require relatively high viscosity oils? High bearing pressures Low operating temperatures Small engine clearances due to large parts Large engine clearances due to small parts 11. Sump systems What is used to return the oil to the tank in a dry sump engine? A scavenge pump A pressure pump Gravity Air pressure What kind of pump is a scavenge pump? #1 A centrifugal pump A piston pump A diaphram pump A gear pump What kind of pump is a scavenge pump? #2 A centrifugal pump A gerotor pump A piston pump A diaphram pump What kind of pump is used to return oil to the sump in an oil lubrication system? #1 A gerotor pump A diaphram pump A piston pump A centrifugal pump What kind of pump is used to return oil to the sump in an oil lubrication system? #2 A piston pump A centrifugal pump A gear pump A diaphram pump What is used to return the oil to the tank in a wet sump engine? Gravity A scavenge pump A pressure pump Air pressure Where is a dry sump oil system used? When high altitude performance is required On engines with high volumes of oil On engines with low volumes of oil On low performance engines Where is a wet sump oil system used? On engines with high volumes of oil On engines with low volumes of oil On high performance engines When high altitude performance is required Where will the oil be stored in a dry sump system? In a tank just outside the engine In a tank inside the radiator In the bottom of the engine In a tank in the fuselage Where will the oil be stored in a wet sump system? In the bottom of the engine In a tank in the fuselage In a tank just outside the engine In a tank inside the radiator Where is a dry sump oil system used? When high altitude performance is required On engines the will be used in extreme aerobatic flight On low performance engines On engines with low volumes of oil 12. Oil filter servicing What is done to clean a canister oil filter? Nothing, the cartridge is disposable The paper is removed, inspected for contamination, cleaned & reinstalled The spiral wound metal strip is removed, inspected for contamination, cleaned & reinstalled The screen is removed, inspected for contamination, cleaned & reinstalled What is done to clean a Cuno filter? The spiral wound metal strip is removed, inspected for contamination, cleaned & reinstalled Nothing, the cartridge is disposable The screen is removed, inspected for contamination, cleaned & reinstalled The paper is removed, inspected for contamination, cleaned & reinstalled What is done to clean a spin on oil filter? The paper is removed, inspected for contamination, cleaned & reinstalled Nothing, they are disposable The screen is removed, inspected for contamination, cleaned & reinstalled The spiral wound metal strip is removed, inspected for contamination, cleaned & reinstalled What is done to clean a surface filtration filter? The screen is removed, inspected for contamination, cleaned & reinstalled The paper is removed, inspected for contamination, cleaned & reinstalled The spiral wound metal strip is removed, inspected for contamination, cleaned & reinstalled Nothing, the cartridge is disposable What is the most common oil filter? A spin on full flow filter A Cuno full flow filter A canister full flow filter A surface filtration full flow filter What should you do before installing an upside down oil filter? Nothing, just put it in Fill it with fuel Fill it with fresh oil Fill it with old oil What kind of contaminants are we concerned about in an oil filter? Dirt Metal particles Carbon Fuel How can you tell what kind of metal particles are in a filter? By density and location By age and colour By colour and magnetic properties By colour and density How tight should an oil filter be tightened when installing? It should be tightened finger tight plus 1/4 turn It should be tight It should be tightened finger tight plus 1/6 turn It should be torqued to specs What is done to disposable oil filters before throwing them away? They are cut open, drained and inspected for metal contamination They are permanently marked so they cannot be reused, They are crushed to reduce their size They are drained of oil to reduce environmental impact 13. Suction screens What is the purpose of the oil suction screen? To remove large particles that could damage the pump To remove large particles that could damage the main filter To remove small particles that could damage the pump To remove small particles that could damage the main filter Where is the suction screen located? After the oil pump and before the pressure relief valve Between the filter and the main bearings After the oil pump and before the filter Before the oil pump When is the Lycoming suction screen typically serviced? At TBO At overhaul Every oil change Every 10 years 14. Carb parts  15. Engine control How is the flow of air into an engine controlled? With a throttle valve in the exhaust system With a throttle valve in the induction system With an exhaust valve in the exhaust system With a fuel metering valve in the induction system How is an aircraft piston engine shut down? By turning off the ignition By turning off the fuel using the fuel selector valve But turning off the fuel using the mixture control But turning off the air using the throttle control When the throttle valve is fully closed what will the engine be doing? Providing a fully lean mixture Generating maximum power Providing a fully rich mixture Generating minimum power When the throttle valve is fully open what will the engine be doing? Generating maximum power Providing a fully rich mixture Providing a fully lean mixture Generating minimum power Which control in the cockpit moves the butterfly valve? The carburetor heat control The mixture control The prop control The throttle control What does the butterfly valve control in a carburetor? Mixture ratio Fuel flow Engine speed and power Air flow 16. Mixture What is mixture ratio referring to? The ratio of fuel to air going into the engine, by weight The ratio of air to fuel going into the engine, by weight The ratio of air to fuel going into the engine, by volume The ratio of air to fuel going into the engine, in litres Which of the following is the leanest mixture? 10:1 16:1 8:1 14:1 Which of the following is the richest mixture? 14:1 10:1 8:1 16:1 What is the mixture ratio for best economy? 8:1 12:1 16:1 15:1 14:1 Approximately what would be the leanest mixture an engine can operate at? 8:1 16:1 12:1 15:1 14:1 What is the chemically "perfect" or Stoichiometric mixture ratio? 12:1 16:1 14:1 8:1 15:1 Approximately what would be the richest mixture an engine can operate at? 16:1 15:1 8:1 12:1 14:1 What is the mixture ratio for best power? 8:1 15:1 14:1 16:1 12:1 When is the mixture leaned on piston aircraft engines? Right after take odd Above 110-130tks Above 30000-40000' Above 3000-4000' What is "lean best power"? The mixture ratio that provides maximum rpm or manifold pressure The mixture ratio that provides minimum rpm or manifold pressure The mixture ratio that uses the least amount of fuel for a power setting The mixture ratio that provides maximum EGT What is "rich best power"? The mixture ratio that provides maximum rpm or manifold pressure The mixture ratio that uses the least amount of fuel for a power setting The mixture ratio that provides minimum rpm or manifold pressure The mixture ratio that provides maximum EGT What mixture setting do manufacturers often choose to use to avoid damaging temperatures? Best economy Lean best power Full rich ICO When the mixture is full rich, what will the valve position be? Fully open Fully closed 1/3 open 1/2 open When the mixture is at idle cut off, what will the valve position be? Fully closed 1/2 open 1/3 open Fully open What instruments will be used on very simple aircraft the lean the mixture? Fuel pressure or CHT gauges Fuel flow or CHT gauges Tachometer or manifold pressure gauges Mixture gauge or manifold pressure gauge What must be done to maintain the correct mixture into the engine as the aircraft climbs? The mixture must be leaned The throttle must be opened The mixture must be richened The throttle must be closed What must be done to the air/fuel ratio as the aircraft climbs? The mixture must be leaned out The mixture must be moved to ICO The mixture must be enrichened The mixture must be moved to full rich How do you make the mixture go to full lean with a carburetor? Push the mixture lever forward Push the throttle forward Pull the mixture lever aft Push the throttle aft How do you make the mixture go to full rich with a carburetor? Push the mixture lever forward Push the throttle aft Pull the mixture lever aft Push the throttle forward What happens to the air/fuel mixture during a rapid opening of the throttle when using a carburetor? The mixture will richen causing the engine to hesitate or stagger The mixture will richen causing the engine to provide a surge of power The mixture will lean out causing the engine to provide a surge of power The mixture will lean out causing the engine to hesitate or stagger Why does the air/fuel mixture lean when opening the throttle quickly when using a carburetor? Because fuel has lower density than fuel and will accelerate quicker Because air has lower density than fuel and will accelerate quicker Because fuel has lower density than fuel and will accelerate slower Because air has higher density than fuel and will accelerate slower What is "best economy"? The mixture ratio that provides minimum rpm or manifold pressure The mixture ratio that uses the least amount of fuel for a power setting The mixture ratio that provides maximum EGT The mixture ratio that provides maximum rpm or manifold pressure What instrument will be used on modern aircraft the lean the mixture? Manifold pressure gauge EGT gauges CHT gauge Tachometer What is after-fire? The ignition of fuel in the exhaust system due to a too lean mixture The ignition of fuel in the induction system due to a too lean mixture The ignition of fuel in the induction system due to a too rich mixture The ignition of fuel in the exhaust system due to a too rich mixture What is backfire? The ignition of fuel in the exhaust system due to a too lean mixture The ignition of fuel in the exhaust system due to a too rich mixture The ignition of fuel in the induction system due to a too lean mixture The ignition of fuel in the induction system due to a too rich mixture 17. Venturis What will happen in the venturi of a carburetor? The air will slow down, pressure and temperature will drop The air will slow down, pressure and temperature will rise The air will speed up, pressure and temperature will rise The air will speed up, pressure and temperature will drop What is often done to increase the pressure drop in the carburetor's venturi? A small ejector pump nozzle will be added The cross section of the venturi will change from round to oval The size of the venturi will be increased A second "boost" venturi will be added How is the differential pressure in a carburetor created? Using a axial fan Using a constant displacement pump Using a venturi Using gravity Where will the lowest pressure in a carburetor be found? Just after the throttle plate At the greatest restriction (smallest part) of the venturi In the fuel bowl At the smallest restriction (biggest part) of the venturi How does a back pressure mixture control adjust fuel flow in a carburetor? By changing the position of a rotary type sleeve valve to the discharge nozzle By use of a butterfly valve to the manifold pressure By raising and lowering the position of the float valve By changing the exposure of the bowl vent air to the venturi air pressure What controls the flow of fuel into the air in a carburator? The differential between fuel and venturi air pressures The differential between venturi and float bowl pressures The differential between venturi and fuel pressures The differential between manifold and float bowl pressures How does a back pressure mixture control stop fuel flow in a carburetor? By connecting venturi air to the float chamber By connecting venturi air to the float By connecting vent air to the float chamber By connecting manifold pressure to the float chamber What determines the amount of fuel drawn through the fuel nozzle in a carburetor? The amount of fuel flowing through the venturi The amount of fuel flowing past the throttle valve The amount of air flowing through the venturi The position of the prop control What provides the force to spray the extra fuel in an acceleration well of a carburetor? Air pressure dropping in the venturi A mechanical fuel pump driven by the throttle lever A electrically driven fuel pump A n engine driven fuel pump 18. Fuel nozzles Why is the fuel discharge nozzle of a pressure carburetor after the throttle valve? Reduced icing issues and increased vaporization efficiency Reduced icing issues and decreased vaporization efficiency Increased icing issues and decreased vaporization efficiency Increased icing issues and increased vaporization efficiency Where is the discharge nozzle of a pressure carburetor? Before the venturi After the throttle valve After the venturi, before the throttle valve In the venturi What is used to control fuel flow to the discharge nozzle of a pressure carburetor? The throttle and a combination of outlet and venturi air pressures Fuel pressure and a combination of outlet and venturi air pressures Fuel pressure and a combination of inlet and venturi air pressures The float and a combination of inlet and venturi air pressures How does a bleed type economizer work in a carburetor? As the throttle moves to full open the needle valve will open to provide additional fuel to the discharge nozzle As the throttle moves to full open the needle valve will close to reduce the fuel flow to the discharge nozzle As the throttle moves to full open the bleed needle valve will close to reduce the air flow to the discharge nozzle As the throttle moves to full open the bleed needle valve will open to increase the air flow to the discharge nozzle How does a needle type economizer work in a carburetor? As the throttle moves to full open the needle valve will open to provide additional fuel to the discharge nozzle As the throttle moves to full open the bleed needle valve will open to increase the air flow to the discharge nozzle As the throttle moves to full open the needle valve will close to reduce the fuel flow to the discharge nozzle As the throttle moves to full open the bleed needle valve will close to reduce the air flow to the discharge nozzle How does a bleed type economizer work in a carburetor? #2 It operates in parallel with the air bleed to increase air flow to the discharge nozzle It operates in series with the main metering jet to decrease fuel flow It operates in series with the air bleed to decrease air flow to the discharge nozzle It operates in parallel with the main metering jet to increase fuel flow What is force used to deliver fuel to the discharge nozzle of a pressure carburetor? Partial vacuum Differential air pressure Gravity Fuel pump pressure What is done to promote a finer spray out of the discharge nozzle in a carburetor? Air is introduced into the fuel flow going to the nozzle Nitrogen is introduced into the fuel flow going to the nozzle Manifold pressure is introduced into the fuel flow going to the nozzle Vacuum is introduced into the fuel flow going to the nozzle How does an acceleration well provide extra fuel in a carburetor? It has a mechanical fuel pump which will inject extra fuel through the discharge nozzle as needed It has a storage area for fuel between the main jet and the discharge nozzle that can be drawn upon as needed It has a mechanical fuel pump which will inject extra fuel through a dedicated fuel nozzle as needed It has a storage area for fuel which will inject extra fuel through a dedicated fuel nozzle as needed What is the purpose of the float bowl vent? To allow atmospheric or intake pressure into the bowl for positive fuel flow through the discharge nozzle To allow atmospheric or intake pressure into the bowl for negative fuel flow through the discharge nozzle To allow fuel into the bowl for positive fuel flow through the discharge nozzle To allow fuel into the bowl for negative fuel flow through the discharge nozzle 19. Mixture control Why does the air/fuel mixture lean when opening the throttle quickly when using a carburetor? Because fuel has lower density than fuel and will accelerate quicker Because air has lower density than fuel and will accelerate quicker Because fuel has lower density than fuel and will accelerate slower Because air has higher density than fuel and will accelerate slower How is the mixture controlled on most light aircraft as they climb? By design By the passengers By automatic mixture control By the pilot How is an aircraft piston engine shut down? By turning off the ignition By turning off the fuel using the fuel selector valve But turning off the fuel using the mixture control But turning off the air using the throttle control What is the standard process to lean the engine? Pull back the mixture to peak EGT and push the mixture forward for a 25 degree drop Push forward the mixture to peak CHT and pull the mixture back for a 25 degree drop Push forward the mixture to peak EGT and pull the mixture back for a 25 degree drop Pull back the mixture to peak CHT and pull the mixture back for a 25 degree drop What is the process to lean some high performance engines? Push forward the mixture to peak EGT and pull the mixture back for a 25 degree drop Pull back the mixture to peak EGT and pull the mixture back for a 25 degree drop Push forward the mixture to peak CHT and pull the mixture back for a 25 degree drop Pull back the mixture to peak EGT and push the mixture forward for a 25 degree drop What should be done when a backfire occurs? Keep cranking the engine and move the mixture to ICO Stop cranking immediately and move the mixture to ICO Keep cranking the engine and move the fuel selector to off Stop cranking immediately and evacuate the aircraft How is the idle mixture checked? At 1500 RPM, pull the mixture back and record the rpm rise At full throttle, pull the mixture back and record the rpm rise At idle, pull the mixture back and record the rpm rise At 2000 RPM, pull the mixture back and record the rpm rise When checking the idle mixture you find an RPM rise of 50-60 rpm. What is the issue with the mixture? Mixture is too rich Mixture is too lean No issue, it is correct Mixture is slightly rich Mixture is slightly lean When checking the idle mixture you find an RPM rise of 0-5 rpm. What is the issue with the mixture? Mixture is too rich Mixture is slightly rich Mixture is slightly lean No issue, it is correct Mixture is too lean When checking the idle mixture you find an RPM rise of 15-20 rpm. What is the issue with the mixture? Mixture is too lean Mixture is too rich Mixture is slightly rich Mixture is slightly lean No issue, it is correct When checking the idle mixture you find an RPM rise of 75-100 rpm. What is the issue with the mixture? Mixture is slightly lean Mixture is too rich Mixture is too lean No issue, it is correct Mixture is slightly rich When checking the idle mixture you find an RPM rise of 25-50rpm. What is the issue with the mixture? No issue, it is correct Mixture is too lean Mixture is slightly lean Mixture is slightly rich Mixture is too rich 20. Idling systems Where is the idle port located in a carburetor? Just downstream or above the throttle valve Just upstream or below the throttle valve Just downstream or below the throttle valve Just upstream or above the throttle valve Where is idle fuel drawn from in a carburetor? Directly from the fuel bowl Directly from the fuel strainer From downstream of the main metering jet From upstream of the main metering jet What does a modern carburetor add to eliminate the idling problem of simple carburetors? A pump to force the fuel out Extra air bleeds to reduce surface tension at the main fuel nozzle Fuel nozzles upstream of the throttle valve Fuel nozzles downstream of the throttle valve Why does a simple carburetor work poorly at idle? At idle the air flow is so slow that there is no pressure differential to draw the fuel out of the nozzle At idle the air flow is so fast that there is no pressure differential to draw the fuel out of the nozzle At idle the air flow is so fast that there is too much pressure differential which draws too much fuel out of the nozzle At idle the air flow is so slow that there is too much pressure differential which draws too much fuel out of the nozzle 21. Carb adjustments How is the idle speed adjusted on a carburetor? By turning the adjustment screw on the idle mixture scontrol, adjusted with the engine cold By turning the adjustment screw on the idle mixture scontrol, adjusted with the engine hot By turning the adjustment screw on the throttle arm, adjusted with the engine cold By turning the adjustment screw on the throttle arm, adjusted with the engine hot How is the idle speed on a carburetor adjusted upwards? Turn the idle screw counter-clockwise when cold Turn the idle screw counter-clockwise when hot Turn the idle screw clockwise when hot Turn the idle screw clockwise when cold How is a carburetor's float level adjusted? By bending the needle valve tab on the float assembly By adjusting the needle valve length By turning the idle adjustment screw By bending the needle valve tab on the float bowl assembly When is a carburetor's float level adjusted? Monthly At overhaul Annually Every 100hrs When would the seat and needle valve be adjusted? As required At overhaul Annually Every 100hrs 22 - 23. Accelerator pump What are the two types of acceleration systems used in a carburetor? Acceleration well & accelerator pump Air bleed & accelerator pump Variable orifice and step cut rotary valve Acceleration well & air bleed When will the accelerator pump of a carburetor push out fuel? As the mixture goes to full lean As the throttle goes to full power As the throttle goes to idle As the mixture goes to full rich When will the accelerator pump of a carburetor draw in fuel? As the throttle goes to idle As the mixture goes to full lean As the mixture goes to full rich As the throttle goes to full power What provides the force to spray the extra fuel in the accelerator pump of a carburetor? Air pressure dropping in the venturi A n engine driven fuel pump A mechanical fuel pump driven by the throttle lever A electrically driven fuel pump Where will the accelerator pump of a carburetor spray out extra fuel? Through the fuel nozzles just downstream of the throttle valve Through the discharge nozzle Through a dedicated fuel nozzle Through the fuel nozzles just upstream of the throttle valve 24. Pressure carb forces What forces does a pressure carburetor use? Gravity metering force Air and fuel metering forces Air metering forces Fuel metering forces What does the air metering force in a pressure carburetor do? It uses regulated fuel pressure force acting on a diaphragm to adjust a control valve It uses impact/inlet and venturi pressures acting on a diaphragm to move a control valve It uses venturi pressure and fuel pressure acting on a diaphragm to move a control valve It uses impact/inlet pressure and fuel pressure acting on a diaphragm to move a control valve What is force used to deliver fuel to the discharge nozzle of a pressure carburetor? Partial vacuum Differential air pressure Gravity Fuel pump pressure What does the fuel metering force in a pressure carburetor do? It uses impact/inlet and venturi pressures acting on a diaphragm to move a control valve It uses impact/inlet pressure and fuel pressure acting on a diaphragm to move a control valve It uses regulated fuel pressure force acting on a diaphragm to adjust a control valve It uses venturi pressure and fuel pressure acting on a diaphragm to move a control valve 25. Fuel strainers What will be used to clean & separate the fuel before use in the engine? An injector A boost pump A strainer A sump Where is the fuel strainer located? In the fuel tank In the carburetor At the high point in the fuel system At the low point in the fuel system What will all fuel strainers have on them? Clear sides to see any contamination A valve on the top to skim off water and contaminants A valve on the bottom to drain water and contaminants Opaque sides to hide contamination What will happen in the fuel strainer? Water and sediment will settle to the bottom Fuel will settle and be taken from the bottom Water and sediment will settle to the top Sediment and water will rise to the top 26. Dual inspection What must be done after disturbing the engine control linkages? A dual or independent inspection A single or individual inspection A triple or triplicate inspection Nothing special  27. Carb finger screen 28. Carb drain 29. Oil control Small piston engines will use how many methods of oil distribution? All of them One One or two Three Large piston engines will use which oil distribution methods? Vacuum, diffusion and regurgitation Pressure and diuretic Pressure, splash and spray Pressure, splash, spray and diffusion 30. Oil press control What is the primary method used to control lubricating oil pressure? Engine speed Manifold pressure A temperature relief valve A pressure relief valve How is lubrication oil pressure adjusted? By changing the oil By changing the relief valve ball size By turning an adjuster screw By changing the relief valve spring How is lubrication oil pressure adjusted? By changing the relief valve spring By changing the oil By changing the relief valve ball size By adding or removing spacer washers