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😵‍💫 > POWERPLANT - RECIPROCATING ENGINE > Flashcards

POWERPLANT - RECIPROCATING ENGINE Flashcards

1
Q

During which stroke of the Otto cycle does the fuel-air mixture get compressed?

A

Compression stroke

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2
Q

In the Otto cycle, what is the primary purpose of the power stroke?

A

To convert chemical energy into mechanical energy

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3
Q

Which phase of the Otto cycle involves the piston moving upwards and both intake and exhaust valves closed?

A

Compression stroke

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4
Q

What are the main components of a reciprocating engine?

A

Cylinder, piston, crankshaft, camshaft, and valves

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5
Q

What is the primary function of the carburetor in an aircraft engine?

A

Mix fuel and air

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6
Q

Which part of the engine does the crankshaft connect to?

A

Piston

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7
Q

What is the purpose of the magneto in an aircraft engine?

A

Provide spark for ignition

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8
Q

Which component in a reciprocating engine controls the opening and closing of the valves?

A

Camshaft

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9
Q

What is the primary function of the spark plug in a piston engine?

A

Ignite the fuel-air mixture

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10
Q

Which component in a reciprocating engine converts linear motion into rotary motion?

A

Crankshaft

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11
Q

What is the primary purpose of the fuel strainer in an aircraft engine?

A

Filter out contaminants

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12
Q

What is the main function of the camshaft in a piston engine?

A

Regulate the opening and closing of valves

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13
Q

Which component in a reciprocating engine helps reduce friction between moving parts?

A

Bearings

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14
Q

Which component is responsible for controlling the timing of the spark in a reciprocating engine?

A

Magneto

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15
Q

How is fuel typically delivered to the cylinders in a fuel-injected engine?

A

By fuel injectors

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16
Q

What type of fuel system is commonly found in Continental fuel-injected engines?

A

Continuous flow fuel injection

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17
Q

What is the primary function of the alternator in an aircraft engine?

A

a. Generate electrical power

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18
Q

Which type of cooling system uses air flowing through the engine cowling to cool the engine?

A

Air cooling

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19
Q

What is the purpose of the scavenge pump in a dry sump lubrication system?

A

Remove excess oil from the engine

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20
Q

Which component in a reciprocating engine converts linear motion into rotational motion?

A

Crankshaft

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21
Q

What component in a reciprocating engine controls the timing of the intake and exhaust valves?

A

Camshaft

22
Q

What is the purpose of an intercooler in a turbocharged engine?

A

Cool the air before it enters the engine

23
Q

What is the purpose of a supercharger in an aircraft engine?

A

Increase air pressure in the intake manifold

24
Q

What component controls the fuel-air mixture in a fuel-injected engine?

A

Injector nozzles

25
Q

What is the function of the intercooler in a turbocharged piston engine?

A

Decrease intake air temperature

26
Q

Which component helps reduce the vibration of an aircraft engine?

A

Vibration damper

27
Q

What is the purpose of the oil cooler in an aircraft engine?

A

Decrease engine temperature

28
Q

What is the purpose of the exhaust manifold in an aircraft engine?

A

Collect and expel exhaust gases

29
Q

What does the term ‘critical altitude’ refer to in a turbocharged engine?

A

The altitude at which the turbocharger no longer provides additional boost

30
Q

What is the function of a fuel injector in a fuel-injected engine?

A

Inject fuel directly into the combustion chamber

31
Q

What is the primary function of a turbocharger in an aircraft engine?

A

Compress incoming air

32
Q

What is the purpose of the primer in a piston engine?

A

Inject fuel directly into the cylinders

33
Q

What component adjusts the mixture control in a fuel-injected engine?

A

Mixture control valve

34
Q

What type of lubrication system is typically used in a reciprocating aircraft engine?

A

Pressure lubrication

35
Q

What is the purpose of baffles in an aircraft engine’s cooling system?

A

Direct airflow around the engine

36
Q

What is the function of the wastegate in a turbocharged engine?

A

Control the flow of exhaust gases to the turbocharger

37
Q

What is the main disadvantage of a carbureted engine compared to a fuel- injected engine?

A

Susceptibility to icing

38
Q

What is the purpose of the mixture control in a piston engine?

A

Adjust the fuel-to-air ratio

39
Q

What does the term ‘supercharger’ refer to in aircraft engines?

A

A device that compresses intake air

40
Q

What is the function of a fuel flow divider in a fuel-injected engine?

A

Distribute fuel evenly to all cylinders

41
Q

What is the primary advantage of a dry sump lubrication system?

A

Better cooling and lubrication under high loads

42
Q

Which component regulates the pressure of the fuel entering the carburetor?

A

Fuel pressure regulator

43
Q

What does the term ‘ram air’ refer to in an aircraft induction system?

A

Air forced into the engine by the aircraft’s forward motion

44
Q

What is a key feature of the Lycoming IO series engines?

A

Fuel injection system

45
Q

What is a common method to identify Lycoming engines in maintenance records?

A

By model designation (e.g., O-360, IO-540)

46
Q

Which of the following is a characteristic of Continental engines?

A

They are typically horizontally opposed and air-cooled

47
Q

What is the purpose of the lubricating oil in a reciprocating engine?

A

To lubricate moving parts and reduce friction

48
Q

Which oil viscosity is typically used in colder climates for reciprocating engines?

A

SAE 20

49
Q

How does a fuel injection system in a reciprocating engine improve
performance?

A

delivering fuel more precisely to each cylinder

50
Q

What is the function of the intercooler in a turbocharged engine?

A

To cool the compressed air before it enters the combustion chamber

51
Q

What is the typical compression ratio range for an aircraft reciprocating engine?

A

7:1 to 9:1

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