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323 > Block 1 > Flashcards

Block 1 Flashcards

1
Q

What do all HEAT engines have in common?

A

The ability to convert fuel (chemical energy) into heat energy, and then into mechanical energy.

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2
Q

Turbojet:

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Turbine Driven

Engine Working Fluid:
Fuel/Air Mixture

Propulsive Working Fluid:
Fuel/Air Mixture

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3
Q

Turbo Prop :

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Turbine Driven

Engine Working Fluid:
Fuel/Air Mixture

Propulsive Working Fluid:
Ambient Air

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4
Q

Ram Jet:

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Ram Compression due to High Flight Speed

Engine Working Fluid:
Fuel/Air Mixture

Propulsive Working Fluid:
Fuel/Air Mixture

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5
Q

Pulse-Jet

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Compression due to Combustion

Engine Working Fluid:
Fuel/Air Mixture

Propulsive Working Fluid:
Fuel/Air Mixture

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6
Q

Reciprocating Engine:

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Reciprocating action of Engine

Engine Working Fluid:
Fuel/Air Mixture

Propulsive Working Fluid:
Ambient Air

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7
Q

Rocket:

Means of Compression:
Engine Working Fluid:
Propulsive Working Fluid:

A

Means of Compression:
Compression Due TO Combustion

Engine Working Fluid:
Oxidizer/Fuel Mixture

Propulsive Working Fluid:
Same as. Engine Working Fluid

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8
Q

Requirements for all engines:

REE

A

Reliability
Efficiency
Economy

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9
Q

What is the useful output in all aircraft powerplants?

A

Thrust: which propels the aircraft forward.

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10
Q

What is THP

A

Thrust Horsepower

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11
Q

What is durability?

A

Amount of engine life obtained while maintaining desired amount of reliability.

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12
Q

What is operating flexibility?

A

The ability of an engine to run smoothly and give desired performance at all speeds from idling to full power output.

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13
Q

Types of Reciprocating Engines: (4)

A

In-Line
V-Type
Opposed
Radial

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14
Q

Basic parts of reciprocating engines: (7)

CCCCVVP

A 
Crank Case
Cylinders
Connecting Rods
Crank Shaft
Valves
Valve-operating mechanism
Pistons
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15
Q

Parts of a Crank Shaft: (5)

A 
Crankpin
CrankCheek
Counterweight
Dampening Weights
Journal
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16
Q

When is a crankshaft statically balanced?

A

When the weight of the entire assembly of crankpins, crank cheeks, and counterweights is balanced around the axis of rotation.

17
Q

When is a crankshaft dynamically balanced?

A

When all of the forces created by crankshaft rotation and power impulses are balanced within themselves so little to no vibration is produced while engine is operating.

18
Q

What is a crank cheek?

A

Crank cheek connects crank pin to the main journal.

19
Q

What is a connecting rod?

A

The link that transmits forces between the piston and crankshaft.

20
Q

What do piston rings do?

A

Prevent leakage of gas pressure from combustion chamber and reduce to a minimum of seepage of oil into the combustion chamber.

21
Q

What is another name for piston pin?

A

Wrist Pin

22
Q

What does a piston pin used for?

A

Joins the piston to the connecting rod.

23
Q

What type of piston pin do modern engines have?

A

Full-Floating Type

24
Q

What does the compression ring do?

A

Prevents the escape of gas past the piston during engine operation

25
Q

What do oil control rings do?

A

Regulate the thickness of the oil film on the cylinder wall.

26
Q

Describe an oil scraper ring

A

Beveled Face
Installed in a groove at the bottom of piston skirt
Scraping edge is away from piston head

27
Q

Where is power developed in an engine?

A

Cylinders

28
Q

Parts of a Cylinder:

CCSPIF

A 
Cast aluminum Head
Connecting Rods
Intake Valve
Spark Plugs
Piston
Forged Steel Barrel
29
Q

What is the purpose of cylinder heads?

A

To provide a place for combustion of fuel/air mixture and to give cylinder more heat conductivity for cooling.

30
Q

What are cylinder barrels made of typically?

A

Steel

31
Q

When steel soaks up nitrogen from the gas and forms iron nitrides in the exposed surface it’s called.

A

Nitrided

32
Q

Cylinders worn and out of round can be groudn out to make them round again and re-nitrided OR

A

chrome plated

33
Q

Propeller shaft is always the ______ end. The acecssory end of the engine is the ______ end. Regardless of engine mounting.

A

Front

Rear

34
Q

Which valve operates at lower temperatures.

Intake or Exhaust

A

Intake

323 (20 decks)

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