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Once the engine has started ignition systems of piston engines are ? Course > landing

exemple question 163
Independent of electrical system of aircraft.


The blade angle of a propeller is the angle between the ?

exemple question 164
The blade angle of a propeller the angle between Reference chord line the propeller plane of rotation. Blade angle usually measured in degrees the angle between chord of blade the propeller plane of rotation .


In very cold weather a slightly higher than normal engine oil pressure during startup ?

exemple question 165
In very cold weather a slightly higher than normal engine oil pressure during startup Is acceptable if it decreases after startup. Blade angle usually measured in degrees the angle between chord of blade the propeller plane of rotation .


exemple question 166
Assuming same swept volume and no turbo charger diesel engines compared to petrol engines Produce less maximum power output. Blade angle usually measured in degrees the angle between chord of blade the propeller plane of rotation .


exemple question 167
The operating principle of magnetos in a piston engine ignition system consists of Breaking primary circuit in order to induce a low amperage high voltage current which distributed to spark plugs. Blade angle usually measured in degrees the angle between chord of blade the propeller plane of rotation .


exemple question 168
In a four stroke piston engine only 'driving' stroke Breaking primary circuit in order to induce a low amperage high voltage current which distributed to spark plugs. Blade angle usually measured in degrees the angle between chord of blade the propeller plane of rotation .


exemple question 169
Excessive priming of a piston engine should be avoided because 1 it drains carburettor float chamber2 risk of engine fire 3 risk of flooding engine4 it fouls spark plugsthe combination that regroups all of correct statements Breaking primary circuit in order to induce a low amperage high voltage current which distributed to spark plugs. a fuel primer a small hand pump designed to put neat fuel directly into either induction manifold (near combustion chamber) or inlet valve port before you start in cold promote presence of fuel vapour that will ignite to start engine aside from fire hazard excessive priming should be avoided because it fouls spark plugs there a risk of flooding engine.


8
Which one of following factors would be most likely to increase possibility of detonation occurring within a piston engine High cylinder head temperature. a fuel primer a small hand pump designed to put neat fuel directly into either induction manifold (near combustion chamber) or inlet valve port before you start in cold promote presence of fuel vapour that will ignite to start engine aside from fire hazard excessive priming should be avoided because it fouls spark plugs there a risk of flooding engine.


9
The octane rating of a fuel characterises Resistance to detonation. The octane rating of fuel a measure of its performance in engines a higher octane number means that fuel and air mixture can withstand more compression before detonating premature detonation can result in an engine making knocking pinging or rattling sounds high octane fuel therefore helps reduce or eliminate knocking pinging or rattling in engines.


10
Both gas turbine and piston engines use a cycle made up of induction compression combustion and exhaust phases which of these statements about a piston engine are correct or incorrect i the process in a piston engine intermittent ii theoretically combustion occurs at constant volume I correct ii correct. Piston engine combustion process intermittent governed the rythm of back forth movements of piston in a cylinder the combustion occurs at constant volume in cylinder turbine engine combustion process continuous occurs at constant pressure.


11
When tas increases blade angle of a constant speed propeller will rpm and throttle levers are not moved I correct ii correct. On a propeller relative airflow the resultant of airflow due to rotation to forward speed a constant speed propeller automatically keeps blade angle adjusted maximum efficiency most conditions encountered in flight so if tas or rpm change blade angle will change the blade angle ('pitch angle' if you prefer) a measurement of distance between propeller cord the plane of rotation with an increasing tas blade angle will increase a propeller similar to a screw if we want to enter quicky in a material we need black screw (high pitch) if we want to go slowly metalic screw (small pitch) more convenient an efficient propeller one which has least amount of slippage therefore converts more engine horsepower into thrust a constant speed propeller keeps propeller pitch adjusted maximum efficiency most conditions of flight.


12
With an aircraft fitted with a fixed pitch propeller during flight at normal cruising speed one magneto fails completely this will first cause Loss of approximately rpm. On a propeller relative airflow the resultant of airflow due to rotation to forward speed a constant speed propeller automatically keeps blade angle adjusted maximum efficiency most conditions encountered in flight so if tas or rpm change blade angle will change the blade angle ('pitch angle' if you prefer) a measurement of distance between propeller cord the plane of rotation with an increasing tas blade angle will increase a propeller similar to a screw if we want to enter quicky in a material we need black screw (high pitch) if we want to go slowly metalic screw (small pitch) more convenient an efficient propeller one which has least amount of slippage therefore converts more engine horsepower into thrust a constant speed propeller keeps propeller pitch adjusted maximum efficiency most conditions of flight.


13
Both gas turbine and piston engines use a cycle made up of induction compression combustion and exhaust phases which of these statements about a piston engine are correct or incorrect i the process in a piston engine continuous ii theoretically combustion occurs at constant pressure I incorrect ii incorrect. piston engine combustion process intermittent governed the rythm of back forth movements of piston in a cylinder the combustion occurs at constant volume in cylinder turbine engine combustion process continuous occurs at constant pressure.


14
When excessively leaning mixture a better fuel economy but still on rich side of peak egt following engine parameter s may exceed their normal operating ranges Cylinder head exhaust gas temperature. piston engine combustion process intermittent governed the rythm of back forth movements of piston in a cylinder the combustion occurs at constant volume in cylinder turbine engine combustion process continuous occurs at constant pressure.


15
Both gas turbine and piston engines use a cycle made up of induction compression combustion and exhaust phases which of these statements about a piston engine are correct or incorrect i the process in a piston engine continuous ii theoretically combustion occurs at constant volume I incorrect ii correct. piston engine combustion process intermittent governed the rythm of back forth movements of piston in a cylinder the combustion occurs at constant volume in cylinder turbine engine combustion process continuous occurs at constant pressure.


16
Given following statements about diesel engines 1 power set the mixture control 2 there no mixture control 3 amount of power determined the fuel flow only 4 thermal efficiency higher than that a petrol engine 5 diesel fuel more inflammable than petrol the combination that regroups all of correct statements I incorrect ii correct. There no mixture control no throttle valve power output of a diesel engine controlled regulating quantity of fuel that injected into cylinder (the amount of air constant) diesel engines are fitted with injectors not with valves.


17
Diesel engines compared to petrol engines have A higher compression ratio. There no mixture control no throttle valve power output of a diesel engine controlled regulating quantity of fuel that injected into cylinder (the amount of air constant) diesel engines are fitted with injectors not with valves.


18
The power output of a diesel engine without a turbo charger regulated A higher compression ratio. On gasoline engine speed power output regulated limiting air fuel mixture entering engine the power output of a diesel engine controlled regulating quantity of fuel that injected into cylinder (the amount of air constant).


19
The ignition system of a running piston engine receives electrical energy from Rotating permanent magnets. On gasoline engine speed power output regulated limiting air fuel mixture entering engine the power output of a diesel engine controlled regulating quantity of fuel that injected into cylinder (the amount of air constant).


20
The purpose of magnetic chip detectors to Warn of impending failure. The most basic type of magnetic filter a drain plug where a magnet in shape of a disc or cylinder attached to its inside surface (typically adhesion) periodically magnetic plug removed inspected ferromagnetic particles which are then wiped from plug such plugs are commonly used in engine sumps gearboxes occasionally in hydraulic reservoirs one useful advantage of mag plugs relates to examining density of wear particles observed as a visual indication of wear rate occurring within machine over a fixed period of running time the appearance of these iron filings on magnets are often described in inspection reports using terms such as peach fuzz whiskers or christmas trees if one normally sees peach fuzz but on one occasion sees a christmas tree instead this would be a reportable condition requiring further inspection remediation.



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