Chapter 5 (ASA) Induction

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

Improper adjustment of carburetor heat valve control linkage.

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.

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.

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

None is required.

On small aircraft engines, fuel vaporization may be increased by

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

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.

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

30 inches Hg.

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.

What is used to drive a supercharger?

Gear train from the crankshaft.

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

Cold.

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

Alcohol spray and heated induction air.

What directly regulates the speed of a turbocharger?

Waste gate.

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

Carburetor.

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.

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

Continue cranking the engine.

What is the purpose of the rate-of-change controller in a turbocharger system?

Controls the rate at which the turbocharger discharge pressure will increase.

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

The airstream ahead of the carburetor.

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

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 use of the carburetor air heater when it is not needed causes

a decrease in power and possibly detonation.

Bootstrapping of a turbocharged engine is indicated by

a transient increase in engine power.

Carburetor icing is most severe at

air temperatures between 30 and 40 degrees F.

If the turbocharger waste gate is completely closed,

all the exhaust gases are directed through the turbine.

The application of carburetor heat during engine operation will

decrease the weight of the fuel/air charge.

As manifold pressure increases in a reciprocating engine, the

density of air in the cylinder increases.

An increase in manifold pressure when carburetor heat is applied indicates

ice was forming in the carburetor.

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

increase the pressure of the incoming air by ram effect.

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.

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

loss of power and possible detonation.

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.

A method commonly used to prevent carburetor icing is to

preheat the intake air.

The differential pressure controller in a turbocharger system

reduces bootstrapping during part-throttle operation.

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

silicon fouling of spark plugs.

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.

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.