Term
| Name the components of the induction system of a reciprocating engine |
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Definition
| The air scoop, carburetor or fuel control, and the intake manifold |
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Term
| What could happen if the induction system becomes obstructed? |
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Definition
| The engine may not be able to produce its rated power or it may not run at all. This may also be the indication of a dirty air inlet filter |
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Term
| How is induction icing categorized? |
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Definition
| As impact ice, fuel evaporation ice, and throttle ice |
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Term
| How does induction icing affect engine performance? |
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Definition
| It causes a reduction in power and possible erratic operation |
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Term
| What is the common method used to prevent induction system ice in a reciprocating engine? |
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Definition
| Raise the temperature of the induction air with a preheater |
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Term
| What causes fuel evaporation ice? |
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Definition
| Fuel evaporation ice is formed because of the decrease in air temperature resulting from evaporation of the fuel after it is introduced into the air stream |
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Term
| Is carburetor throttle ice more likely to occur at higher or lower power settings? Why? |
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Definition
| At a lower power setting because the throttle is partly closed, offering a larger surface area for ice accumulation |
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Term
| What may be an indication of leaking intake pipes? |
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Definition
| The runs rough at low r.p.m. |
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Term
| What happens to the engine power when the carburetor heat is applied? |
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Definition
| There is a noticeable drop in power. |
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Term
| What could happen if carburetor heat is applied and at high engine power settings? |
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Definition
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Term
| What are two types of supercharged induction systems? |
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Definition
| Internally driven and externally driven |
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Term
| How and at what point does the internally driven supercharger boost air pressure? |
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Definition
| An (engine-driven) impeller compresses the fuel/air mixture after it leaves the carburetor |
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Term
| What is used to power a turbocharger? |
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Definition
| Engine exhaust gas directed onto the turbocharger turbine |
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Term
| What could result if the waste gate in a turbocharger system does not close fully? |
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Definition
| The engine may not be able to produce its rated power at certain altitudes, and the aircraft may not be capable of reaching critical altitude |
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Term
| What function does a turbocharger waste gate perform? |
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Definition
| It controls the amount of exhaust gas either into or around the turbocharger, thus controlling the boot pressure of the turbocharger |
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Term
| What could cause a turbocharged engine to surge? |
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Definition
| There could be a waste gate or controller malfunction |
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Term
| What are the most common ways to control a waste gate? |
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Definition
| Either mechanically with linkages to the throttle or a separate control, or by an actuator that is driven by oil pressure |
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Term
| In a pressurized reciprocating aircraft, what component in the turbocharger system is used to limit the amount of turbocharger airflow used for cabin pressurization? |
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Definition
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Term
| What is the function of a divergent-shaped jet engine inlet during subsonic flight? |
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Definition
| It causes the air velocity to decrease with a subsequent increase in air pressure |
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Term
| Where are bellmouth inlet ducts typically found? |
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Definition
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Term
| How do venturi-type particle separators, found on many turbine powered helicopters, function? |
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Definition
| A venturi is used to accelerate the of incoming air and debris through a curved intake. The debris gains too much inertia to allow it to follow the curved intake towards the engine, and is channeled away form the compressor |
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Term
| What are the most common methods used for anti-icing of turbine engine inlet ducts? |
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Definition
| Engine bleed air and electric heating elements |
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