Induction and Manifold System

What does an increase in manifold pressure when carburetor heat is applied indicate?

Ice forming in the carburetor

What are the different types of intake icing?

Impact ice, Throttle ice, Fuel evaporation Ice.

What is the purpose of the sonic venturi in a turbocharger engine system?

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

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

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

Why is Carburetor heat not generally used during takeoff unless absolutely necessary?

Loss of power and possible detonation

Why is Carburetor heat not generally used during takeoff unless absolutely necessary?

Loss of power and possible detonation.

Which manufacturer usually produces sea-level boosted engines?

Lycoming

Where would an inlet air heater be located in the induction system of a fuel injected engine?

None is required

Which is not a turbocharger system component?

crankshaft

Sea-level boosted engines maintain a maximum boost pressure of ________ "Hg

29.92

Boost manifold pressure is generally considered to be any manifold pressure above standard sea level, which is

29.92 Inches Hg

What is used to turn the turbine wheel on a turbocharger?

Exhaust Air

What are the three turbocharger regulating components of a sea-level boosted turbocharger system?

Exhaust bypass assembly, Density controller, Differential pressure controller

What is another name for a wastegate?

Exhaust bypass valve

If a turbocharger waste-gate is completely open?

Exhaust gases flows past the turbine wheel, creating no boost.

T/F A short stack exhaust can be used on turbocharged engines?

False

T/F A turbocompound system uses exhaust gasses to drive a turbine that is couples to a supercharger?

False

T/F The turbine wheel and the compressor wheel share a common shaft within the turbocharger and spin independently on their own bearings.

False

T/F The primary purpose of the air induction system is to provide air in sufficient quantity and temperature to support normal combustion.

False/Temperature has nothing to do with it

The tapered end of a tailpipe?

Helps reduce noise

When MAP is increased ______ is increased.

Horsepower

What is the component on the exhaust system of some engines that increases airflow through the engine cowling to aid in cooling?

Augmenter tubes

What component directly regulates the speed of the turbocharger?

Waste Gate

What is fuel evaporation ice?

Caused by fuel evaporation in the venturi.• Most often occurs between 30 and 40 degrees F.• May occur as high as 70 degrees F.

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

Cold or off Position

How can carburetor icing on an engine equipped with a constant speed propeller be detected?

A decrease in manifold pressure and a engine power with a constant RPM

How can carburetor icing on an engine be detected?

A decrease in manifold pressure with a constant RPM

Where is air pressure the highest in a normally aspirated engine?

Air scoop

What is the primary disadvantage of a supercharger?

All the power to the supercharger has to come from the crankshaft

Which type of induction system boosts manifold pressure and has two different speed ratios?

Altitude engines

Mufflers use __________ to break up sound energy.

Baffles

How are normally aspirated engines different than boosted engines?

Boosted engines have turbo chargers or super chargers

When the wastegate is fully open, all of the air ______________

Bypasses the turbocharger

What is impact ice?

Caused by flying through freezing rain (32 degrees F).

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

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

Which is not a turbocharger system component?

Crankshaft

How can a pilot determine if a carburetor is icing?

Decrease in engine power or manifold pressure.

At altitudes above a turbosupercharged/turbocharged engine's critical altitude?

Decreases

Which types of air filters are used on aircraft?

Paper, Flocked screen, Polyurethane foam.

What is the most commonly used method for preventing carburetor icing?

Preheat the intake air.

What is the pressure ratio controller?

Prevents Turbo boosting UDP more than 2.2 times the ambient pressure.

What is the rate-of-change controller?

Prevents the turbocharger from boosting pressure to fast due to a lag in the system.

What is not an additional use of a turbocharger?

Reference pressure for the manifold pressure gauge.

What are the differences between a supercharger and a turbocharger?

Supercharger is engine driven while the turbocharger power is taken from the exhaust gasses leaving the engine

The purpose of an air scoop at the intake of the induction system is to?

Supply enough air to the induction system while increasing the incoming air pressure and bring sufficient quantity of air.

What is Upper Deck Pressure?

The air pressure between the outlet of the compressor and the throttle valve.

On an aircraft equipped with an alternate air system, what will happen if the main air scoop/duct or the air filter becomes clogged?

The alternate air door will open and unfiltered air will flow into the engine.

How is a wastegate operated?

The amount of oil that is allowed to leave or exit the wastegate controller.

What is critical altitude?

The density altitude at which the engine can maintain it's rated sea level horsepower.

A linkage between the__________ and the waste gate moves the waste gate in proportion to the throttle.

Throttle

Which type if ice is caused by a temperature drop as air flows across the throttle plate?

Throttle Ice

T/F Above critical altitude, HP and MAP decreases in proportion to altitude increase?

True

T/F Power decreases proportionally to altitude in a sea-level supercharged engine.

True

T/F The purpose of the exhaust system is to remove spent gasses of combustion and safely route them overboard?

True

T/F The wastegate regulates the speed of the turbocharger?

True

What is used to turn the compressor on a turbocharger?

Turbine Wheel

What is the difference between a turbocharger and a turbo-supercharger?

Turbo charger is exhaust driven. A turbo-supercharger is engine driven/above 30 inches HG

Air pressure after the compressor wheel is called what?

UDP

The pressure ration controller prevents the turbocharger from boosting_____________ more than times ambient pressure.

Upper Deck Pressure (UDP)

What happens when a plane reaches its critical altitude?

When a plane reaches critical altitude the manifold pressure and engine power decreases.

Carburetor icing is most severe at...

When air temp is between 30 to 40 Degrees F. (You can get carburetor icing up to 70 degrees)

What is bootstrapping?

When altitude is increased air becomes less dense. Which causes the waste gate to open and close causing the manifold pressure to fluctuate.