Induction and Engine Airflow Systems Flashcards

1
Q

What happens to engine power when the carburetor heat is applied

A

There is a noticeable drop in power

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2
Q

What could happen if carburetor heat is applied at high engine power settings?

A

Detonation

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3
Q

Name the three components on the induction system of a reciprocating engine

A

air scoop, fuel control, and intake manifold

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4
Q

What could happen if the induction system becomes obstructed?

A

The engine may not be able to produce it’s rated power or may not run at all

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5
Q

What is the common method used to prevent induction system ice in a reciprocating engine?

A

Raise the temperature of induction air with a pre-heater

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6
Q

What causes fuel evaporation ice?

A

It is because of the decrease in air temperature resulting from evaporation of the fuel, after it is introduced into the airstream

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7
Q

How does induction icing affect engine performance?

A

It causes a reduction in power and possible erratic operation

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8
Q

How is induction icing categorized?

A

As impact ice, fuel evaporation ice, and throttle ice

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9
Q

Is carburetor, throttle ice, more likely to occur at a higher or lower power setting?

A

Lower - because the throttle is partly close offer in a larger surface area for ice accumulation

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10
Q

What may be the indication of leaking intake pipes?

A

The engine runs rough at low rpm

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11
Q

What are two types of supercharged induction systems?

A

Internally driven and externally driven

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12
Q

How and at what point does an internally driven supercharger boost air pressure?

A

An impeller compresses the fuel air mixture after leaving the carburetor

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13
Q

From where does an externally driven supercharger derive its power?

A

From the energy of engine exhaust gases, directed against some of the turbine

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14
Q

How and at what point does an internally driven supercharger, boost air pressure?

A

An engine driven impeller compresses fuel air mixture after it leaves the carburetor

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15
Q

What is used to power a turbo charger?

A

Engine exhaust gas directed into the turbo charger turbine

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16
Q

What is the function of a turbo charger wastegate?

A

It controls the volume of exhaust gas that is directed into the turbine

17
Q

What could result if the wastegate on a turbo charger system does not close fully?

A

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

18
Q

What could cause a turbo charged engine to surge?

A

There could be a waste gate or controller malfunction

19
Q

What are the most common ways to control a wastegate actuator power?

A

Either mechanically with linkages to the throttle, or a separate control, or by an actuator that is driven by oil pressure

20
Q

What is used on turbocharged engines for wastegate actuator power?

A

Oil pressure

21
Q

In a pressurized reciprocating aircraft, what component in the turbo charger system is used to limit the amount of turbo charger airflow use for cabin pressurization

A

The sonic Venturi

22
Q

What is the function of a divergent shape jet engine inlet during subsonic flight?

A

He causes the air velocity to decrease with a subsequent increase in air pressure

23
Q

Where are bellmouth Inlet ducts typically found?

A

Helicopter engines

24
Q

What is the function of a sonic Venturi in a turbo charger system?

A

To limit the amount of turbo charger airflow used for cabin pressurization

25
How do Venturi type particle separator’s found on many turbine power helicopters function
A Venturi is used to accelerate the flow of incoming air and debris through a curved intake. Debris gains too much inertia to allow it to follow the curved intake towards the engine and its channel away from the compressor.
26
The Venturi type particle separator found on many turbine powered helicopters utilizes what characteristic of matter to help remove debris from the induction air?
Inertia
27
What are the most common methods used for anti-icing of turbine engine inlet ducts?
Engine bleed air and electric heating elements
28
What is an indication of a dirty air inlet filter?
Loss of power
29
Name two methods used for anti-icing of turbine engine inlet ducts
Engine bleed air and electrical heating elements
30
When is carburetor throttle ice most likely to form due to throttle position?
During part throttle operation when the throttle is in a partly closed position