INDUCTION AND ENGINE AIRFLOW SYSTEM

42問 • 1年前

問題一覧

The action of a carburetor air scoop is to supply air to the carburetor, but it may also

increase the pressure of the incoming air by ram effect.

What are the three basic regulating components of a sea- level boosted turbocharger system? 1. Exhaust bypass assembly. 2. Compressor assembly. 3. Pump and bearing casing. 4. Density controller. 5. Differential pressure controller.

1,4,5

If carburetor or induction system icing is not present when carburetor heat is applied with no change in the throttle setting, the

mixture will become richer.

Carburetor icing on an engine equipped with a constant- speed propeller can be detected by

a decrease in manifold pressure with a constant RPM.

The application of carburetor heat will have which of the following effects?

The mixture will become richer.

Which of the following statements regarding volumetric efficiency of an engine is true?

It is possible to exceed 100 percent volumetric efficiency of some engines by the use of superchargers of the proper type.

When starting an engine equipped with a carburetor air heater, in what position should the heater be placed?

Cold

What is used to drive a supercharger?

Gear train from the crankshaft.

Where would a carburetor air heater be located in a fuel injection system?

None is required.

Into what part of a reciprocating engine induction system is deicing alcohol normally injected?

The airstream ahead of the carburetor.

When an engine with a subsonic divergent type inlet duct is running in place at high speed on the ground, the air pressure within the inlet is

positive

What is the purpose of a turbocharger system for a small reciprocating aircraft engine?

Compresses air to maintain manifold pressure constant from sea level to the critical altitude of the engine.

On small aircraft engines, fuel vaporization may be increased by

circulating the fuel and air mixture through passages in the oil sump.

Bootstrapping of a turbocharged engine is indicated by

a transient increase in engine power.

If a fire starts in the induction system during the engine starting procedure. what should the operator do?

Continue cranking the engine.

What method(s) is/are used to provide clean air to the engines of helicopters and turboprop airplanes that have particle (sand and ice) separators installed?

Sharp airflow directional change to take advantage of inertia and/or centrifugal force, and filters or engine inlet screens.

Which of the following would be a factor in the failure of an engine to develop full power at takeoff?

Improper adjustment o carburetor heat valve control Linkage.

What part of an aircraft in flight will begin to accumulate ice before any other?

Carburetor

In addition to causing accelerated wear, dust or sand ingested by a reciprocating engine may also cause

silicon fouling of spark plugs.

Carburetor icing nay be eliminated by which of the following methods?

Alcohol spray and heated induction air.

Carburetor icing nay be eliminated by which of the following methods?

Alcohol spray and heated induction air.

The vortex dissipators installed on some turbine- powered aircraft to prevent engine FOD utilize

a stream of engine bleed air blown toward the ground ahead of the engine

The purpose of a bemouth compressor inlet is to

maximize the aerodynamic efficiency of the inlet.

An increase in manifold pressure when carburetor heat is applied indicates

ice was forming in the carburetor.

The differential pressure controller in a turbocharger system

reduces bootstrapping during part-throttle operation.

Carburetor icing is most severe at

air temperatures between 30 and 40°F.

When operating an engine, the application of carburetor heat will have what effect on the fuel air mixture?

Enriching the mixture until the AMC can make a compensation.

The purpose of an engine/inlet anti-ice system is primarily to

prevent ice formation in engine and/or inlet areas.

Boost manifold pressure is generally considered to be any manifold pressure above

30 inches Hg.

The purpose of an engine/inlet anti-ice system is primarily to

prevent ice formation in engine and/or inlet areas.

Boost manifold pressure is generally considered to be any manifold pressure above

30 inches Hg.

A carburetor air pre-heater is not generally used on takeoff unless absolutely necessary because of the

loss of power and possible detonation.

During full power output of an unsupercharged engine equipped with a float-type carburetor, in which of the following areas will the highest pressure exist?

Carburetor air scoop.

What is the purpose of the density controller in a turbocharger system?

Limits the maximum manifold pressure that can be produced by the turbocharger at full throttle.

What directly regulates the speed of a turbocharger system

Waste gate.

The absolute pressure controller on some small engines is designed to sense oil pressure which flows through the waste gate actuator and then through the controllers on the turbocharger system the pressure between the turbocharger and the throttle valve is called

upper deck pressure

In an airplane equipped with an alternate air system, if the main air duct air filter becomes blocked or clogged

the system will automatically allow warm, unfiltered air to be drawn into the engine.

What indications nay shift when a turbofan engine anti- icing (bleed air) system is turned on? 1. Tachometer. 2. EGT. 3. EPR.

1, 2 and 3,

The application of carburetor heat during engine operation will

decrease the weight of the fuel/air charge.

A method commonly used to prevent carburetor icing is to

preheat the intake air.

The purpose of a sonic venturi on a turbocharged engine is to

limit the amount of air that can flow from the turbocharger into the cabin for pressurization.

Vortex dissipator systems are generally activated by

landing gear switch.

airlaw

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