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AMT1218
Induction & Exhaust
| Question | Answer |
|---|---|
| Engine cooling is aided by the use of what component? | Augmenter |
| What components operate at the highest temperatures in a gas turbine engine? | First stage turbine nozzle guide vanes |
| Drawing additional air over the engine for cooling while creating a low pressure area at the rear of the engine cowling is accomplished by what component? | Augmenter |
| An intercooler is used on turbocharger systems to cool what? | Air entering the carburetor from the turbocharger |
| Most of the air passing through the combustion section of a jet engine is used for what? | Cooling |
| Why is intake air commonly preheated? | To prevent carburetor icing |
| Deicing alcohol is normally injected into the induction system at what point? | The airstream ahead of the carburetor |
| Would a fuel injected system require a carburetor air heater? | No, it does not have a carburetor |
| If ice were to form in the carburetor, would manifold pressure increase or decrease when heat is applied? | Increase |
| The density of the air in the cylinders increase with an increase in what? | Manifold pressure |
| Improper adjustment of carburetor heat valve control linkage could be a factor in what? | Failure to develop full power at takeoff |
| What would cause all the exhaust gases to be directed through the turbine in a turbocharger system? | Turbocharger waste gate is completely closed |
| What controls the rate at which the turbocharger discharge pressure will increase? | rate-of-change controller |
| The speed of the turbocharger is directly regulated by what? | Waste gate |
| Limiting the amount of air that can flow from the turbocharger into the cabin for pressurization is the purpose of what? | A sonic venturi on a turbocharged engine |
| What is used to drive a supercharger? | Gear train from the crankshaft |
| The purpose of a bellmouth compressor inlet is to | maximize the aerodynamic efficiency of the inlet |
| Some turbine powered aircraft are equipped with vortex dissipaters to prevent FOD using | engine bleed air blown toward the ground ahead of the engine |
| How are vortex dissipator systems generally activated? | Landing gear switch |
| What is the primary purpose of an engine anti-ice system? | To prevent ice formation in the engine and/or inlet areas |
| If equipped with a carburetor air heater, the heater should be placed in what position when starting the engine? | Cold |
| What will happen to the volume of air in the cylinder with the application of carburetor heat during operation? | Decrease |
| Adding carb heat will have what effect on the mixture? | Richer |
| If the main air duct filter becomes blocked, what will the system automatically do? | Allow warm, unfiltered air to be drawn into the enginee |
| Circulating the fuel and air mixture through passages in the oil sump will increase what? | Fuel vaporization on small aircraft engines |
| What is not generally used on takeoff unless necessary due to loss of power and possible detonation? | Carburetor air pre-heater |
| Why is high nickel chromium steel is used in many exhaust systems? | Corrosion resistance and low expansion coefficient |
| What is one source commonly used for carburetor air heat? | Exhaust gases |
| What is the purpose of a slip joint in an exhaust collector ring? | It aids in alignment and absorbs expansion |
| Where would brass or heat-resistant nuts are used in the exhaust system? | Connect the exhaust system to the cylinders |
| Thrust reversers are capable of producing how much reverse thrust? | 35 - 50% of the rated thrust |
| What should be removed in order to inspect the exhaust system when a heat exchanger is used? | The heater air shroud |
| When inspecting the welding on exhaust stacks, how should they appear? | The weld should taper off smoothly into the base metal |
| Exhaust gases drive turbines in a turbo-compound engine by driving the crankshaft through suitable couplings. This contributes to what? | total engine power output |
| What engine component drives the power recovery turbines used on some reciprocating engines? | Crankshaft |
| If the repair to an exhaust system has sloppy weld beads that protrude internally may cause what? | Local hot spots |
| How tightly should exhaust system ball joints be installed? | Loose enough to permit some movement |
| What would happen if the internal muffler baffles become dislodged? | The muffler outlet would be obstructed and cause excessive exhaust back pressure |
| Carbon monoxide poisoning can occur as a result of what? | Undetected exhaust system leaks |
| Exhaust soot inside cowling and on adjacent components us evidence of what? | Exhaust system leaks |
| Turbocharged engine exhaust systems operate at higher what as compared to normally aspirated engines? | Temperatures and pressures |
| Exhaust system failures are caused by what? | High operation temperatures |
| The engine bleed air system is used to operate what actuating system? | Thrust reversers |
| High bypass turbofan engines use what kind(s) of reversing? | Cold stream, or both cold and hot stream |
| If thrust reversers are deployed, how will normal capabilities of thrust be effected? | Rearward (normal flow) would be less than forward (reverse flow) |
| What are thrust reversers capable of doing when the plane is on the ground? | Reversing the plane's movement and slowing it's forward speed |
| What is the proper operating sequence when using thrust reversers to slow an aircraft after landing? | Retard, raise, retard to ground level |
| What prevents dislodged muffler baffles from obstructing the muffler outlet? | Exhaust outlet guard |
| What system compresses air to maintain manifold pressure throughout varying altitudes? | Turbocharger system |
| Any manifold pressure above 30" Hg is considered what? | Boost manifold pressure |
Created by:
Ms.Fietzek
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