2

Question 1

Usually includes both the engine and the propeller.
- The primary function of the engine is to provide to turn the propeller

Answer 1

powerplant

Question 2

The power plant converts the _______________________ which creates the
forward motion or thrust.

Answer 2

chemical energy into mechanical energy

Question 3

An aircraft engine can be categorized into two groups

Answer 3

Reciprocating engines and jet
engines or turbines.

Question 4

derived from the back and forth or reciprocating
movement of the pistons.
- it is this motion that produces the mechanical energy needed to accomplish work.

Answer 4

reciprocating engine

Question 5

needed to let the fuel/air into the cylinder.

Answer 5

intake valve

Question 6

moving within the cylinder, forms one of the walls of the combustion chamber. The piston has rings which seals the gasses in the cylinder, preventing any loss of power around the sides of the piston.

Answer 6

piston

Question 7

forms a link between the piston and crankshaft.

Answer 7

connecting rod

Question 8

forms a part of the chamber in which the fuel is compressed and burned.

Answer 8

cylinder

Question 9

needed to let the exhaust gasses out.

Answer 9

Exhaust valve

Question 10

aircraft engine also absorbs the power or work from all the cylinders and transfer it into propeller.

Answer 10

crankshaft

Question 11

The basic principle of reciprocating engine involve the conversion of chemical energy in the form of fuel into mechanical energy. This occurs within the cylinders of the engine. Through a process known as the

Answer 11

four stroke operating cycle

Question 12

is the position of the piston at the highest point in an engine cylinder

Answer 12

Top dead center or TDC

Question 13

is the position of the piston at the lowest point in an engine cylinder.

Answer 13

Bottom Dead Center or BDC

Question 14

begins as the intake valve opens and the fuel and air mixture is drawn into the cylinder. The piston is at the top dead center, moving downward as the piston reaches the bottom dead center intake stroke ends.

Answer 14

Intake Stroke

Question 15

This stroke begins when the intake valve closes and the piston starts moving upwards to the top dead center while the piston is moving up, it compresses the fuel and air mixture. This phase of the cycle used to obtain a much greater power output from the fuel and air mixture once it is ignited.

Answer 15

Compression Stroke

Question 16

compressed fuel and air is ignited by the spark plug. This causes a tremendous pressure increase in the cylinder and forces the piston downward away from the cylinder head creating the power that turns the crankshaft. The revolving crankshaft then transfers this energy to the aircraft’s propeller.

Answer 16

Combustion or Power Stroke-

Question 17

starts when the exhaust valves open, the piston moves upward to purge the cylinder of burned gasses. Once the exhaust valve closes, the intake valve opens and the piston moves down again, repeating this cycle.

Answer 17

Exhaust Stroke-

Question 18

Jet Engines or turbine
Divided into two section

Answer 18

hot and cold

Question 19

where the combustion occurs by adding fuel to the airflow provided by the intake of the cold section

Answer 19

hot

Question 20

brings a free stream of air into the engine. Its focus is to decelerate the incoming air.

Answer 20

INLET

Question 21

used to** increase the air pressure before it enters the combustor.**

Answer 21

compressor

Question 22

__________ are the moving parts of the compressor while _______ are the fixed part.

Answer 22

rotors, stators

Question 23

sits between the compressor and turbine.

Answer 23

Burner or combustion chamber

Question 24

comparable to a compressor because it is also consist of several rows of rotors, the __________converts thermal energy to kinetic energy by expanding through nozzles then into rotational mechanical energy in a spnning rotor

Answer 24

Turbine-

Question 25

convert the thermal energy from the exhaust gases into kinetic energy in order to obtain a high exhaust velocity.

Answer 25

nozzle

Question 26

simplest and the first type of gas turbine engine. Type of engine that generates its thrust by burning a 100% of the air usually used for jet fighters

Answer 26

Turbojet-

Question 27

provides more efficiency when flying at lower speeds. This engine is** used for some big cargo airplanes.** Best suited for landing and taking off at shorter runways.

Answer 27

Turboprop

Question 28

most modern variation of the basic gas turbine. Modern airlines used turbofan engines to propel their airplanes through the air. This is due to their higher thrust and fuel efficiency.

Answer 28

Turbofan engine-

Question 29

has been optimized to **produced shaft power, to drive machinery instead of producing thrust. **Most commonly used in applications that require a small but powerful lightweight engine inclusive of helicopters.

Answer 29

Turboshaft engine