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The conditions most likely to produce the highest engine power are ? Patent > Licence

exemple question 160
Cold dry air at high pressure. Hot low pressure air contains fewer oxygen molecules (per cubic meter or foot) than cold high pressure air water molecules (humidity) displace a certain amount of oxygen in engine air intake meaning that engine inhales less oxygen.


The kind of compressor normally used as a supercharger is ?

exemple question 161
The kind of compressor normally used as a supercharger Cold dry air at high pressure. the compressor section fitted with a radial compressor turbine section can be radial or axial.


An EGT Exhaust Gas Temperature indicator for a piston engine is used to ?

exemple question 162
An egt exhaust gas temperature indicator a piston engine used to Assist pilot to set correct mixture. the compressor section fitted with a radial compressor turbine section can be radial or axial.


exemple question 163
The conditions which can cause detonation are High manifold pressure low revolutions per minute. High pressure temperature in cylinder cause detonation (this when fuel/air mixture explodes rather than burns) high manifold pressure low revolutions would cause this condition the grade of fuel used in an engine must ensure that detonation doesn't occur during engine's normal operating range (for temperature pressure) a lower octane fuel allows detonation to occur at lower temperatures pressures but it doesn't actually cause detonation.


exemple question 164
If manifold pressure increased blade angle of a constant speed propeller High manifold pressure low revolutions per minute. Manifold pressure controls blade angle of a constant speed propeller (also know as a variable pitch propeller) a constant speed performs pretty much same function as a gearbox does in a car in that it 'maintains engine rpm over a varying conditions of roa the gearbox (or constant speed prop) there because engine work best within a certain range of rpm going too fast or too slow not good them the manifold absolute pressure (map) indicates power output of a piston engine if it increased blade angle will increase (as if you climb in mountain a car a lower gear will give more torque) fine pitch will give more thurst.


exemple question 165
The 'slipstream effect' of a propeller most prominent at Low airspeeds with high power setting. The high speed rotation of an airplane propeller gives a corkscrew or spiraling rotation to slipstream at high propeller speeds low forward speed (as in takeoffs approaches to power on stalls) this spiraling rotation very compact exerts a strong sideward force on airplane's vertical tail surface when this spiraling slipstream strikes vertical fin on left it causes a left turning moment about airplane's vertical axis the more compact spiral more prominent this force is as forward speed increases however spiral elongates becomes less effective the corkscrew flow of slipstream also causes a rolling moment around longitudinal axis note that this rolling moment caused the corkscrew flow of slipstream to right while rolling moment caused torque reaction to left in effect one may be counteracting other however these forces vary greatly it up to pilot to apply proper correction action use of flight controls at all times these forces must be counteracted regardless of which the most prominent at time.


exemple question 166
The operating principle of float type carburettors based on Difference in air pressure at venturi throat the air inlet. The carburattor uses venturi principle as speed of air increases through choke pressure reduces enough to pull fuel into it via main nozzle which connected directly to fuel system through a series of pumps jets.


8
The crank assembly of a piston engine comprises Crankshaft connecting rods pistons. The carburattor uses venturi principle as speed of air increases through choke pressure reduces enough to pull fuel into it via main nozzle which connected directly to fuel system through a series of pumps jets.


9
The purpose of blow in doors at air inlets to Provide engine with additional air at high power settings low air speeds. Spring loaded doors located in inlet duct of some gas turbine or turbofan engines these doors are normally closed but they open under conditions of low speed high engine power to permit additional air into compressor blow in doors help prevent compressor stall here are some examples .


10
On four stroke piston engines theoretical valve and ignition settings are readjusted in order to increase Provide engine with additional air at high power settings low air speeds. Spring loaded doors located in inlet duct of some gas turbine or turbofan engines these doors are normally closed but they open under conditions of low speed high engine power to permit additional air into compressor blow in doors help prevent compressor stall here are some examples .


11
For internal cooling reciprocating engines are especially dependent on The circulation of lubricating oil. Spring loaded doors located in inlet duct of some gas turbine or turbofan engines these doors are normally closed but they open under conditions of low speed high engine power to permit additional air into compressor blow in doors help prevent compressor stall here are some examples .


12
The main purpose of mixture control to Adjust fuel flow to obtain correct fuel/air ratio. Spring loaded doors located in inlet duct of some gas turbine or turbofan engines these doors are normally closed but they open under conditions of low speed high engine power to permit additional air into compressor blow in doors help prevent compressor stall here are some examples .


13
In which sections of carburettor would icing most likely occur Venturi the throttle valve. Spring loaded doors located in inlet duct of some gas turbine or turbofan engines these doors are normally closed but they open under conditions of low speed high engine power to permit additional air into compressor blow in doors help prevent compressor stall here are some examples .


14
For a reciprocating engine fuel/air ratio or mixture the ratio between Mass of fuel mass of air entering cylinder. The most accurate measure that you can get the mass of air fuel because it compensating the density volume changes with temperature the 15 1 therefore 15 parts of air weight to 1 part of fuel weight.


15
Which statement correct concerning effect of application of carburettor heat The density of air entering carburettor reduced thus enriching fuel/air mixture. When you apply carburettor heat to melt ice that has formed in throat (or venturi) air entering to mix with fuel passes around exhaust pipe to be heated this heated air has its density reduces the volume of air does not change when you apply carburettor heat.


16
Vapour lock Vaporizing of fuel prior to reaching carburettor. When you apply carburettor heat to melt ice that has formed in throat (or venturi) air entering to mix with fuel passes around exhaust pipe to be heated this heated air has its density reduces the volume of air does not change when you apply carburettor heat.


17
The reading on oil pressure gauge the Pressure of oil on outlet side of pressure pump. When you apply carburettor heat to melt ice that has formed in throat (or venturi) air entering to mix with fuel passes around exhaust pipe to be heated this heated air has its density reduces the volume of air does not change when you apply carburettor heat.


18
The main purpose of a turbocharger to Maintain power with increasing altitude. When you apply carburettor heat to melt ice that has formed in throat (or venturi) air entering to mix with fuel passes around exhaust pipe to be heated this heated air has its density reduces the volume of air does not change when you apply carburettor heat.


19
An excessively rich mixture can be detected Black smoke from exhaust. When you apply carburettor heat to melt ice that has formed in throat (or venturi) air entering to mix with fuel passes around exhaust pipe to be heated this heated air has its density reduces the volume of air does not change when you apply carburettor heat.


20
The compression ratio of a piston engine the ratio of Volume of cylinder with piston at bottom dead centre to that with piston at top dead centre. compression ratio = volume at bottom dead / volume at top dead .



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