Engine Components & Performance Quiz

<p>EEC (D)</p> Signup and view all the answers

<p>Turbine nozzle (C)</p> Signup and view all the answers

<p>15:1 (A)</p> Signup and view all the answers

<p>Micrometer (C)</p> Signup and view all the answers

<p>Labyrinth Seal (D)</p> Signup and view all the answers

<p>Increases the flow of cooling air into the nozzle (D)</p> Signup and view all the answers

<p>Thrust and Airplane Speed (D)</p> Signup and view all the answers

<p>Pressure decreases while velocity increases and temperature decreases (B)</p> Signup and view all the answers

<p>It has high aerodynamic efficiency with zero duct loss. (B)</p> Signup and view all the answers

<p>Centrifugal compressor (A)</p> Signup and view all the answers

<p>It produces uneven distribution of airflow into the compressor. (A)</p> Signup and view all the answers

<p>The ability to convert kinetic pressure energy into static energy. (B)</p> Signup and view all the answers

<p>It allows changes in compressor geometry for better airflow management. (A)</p> Signup and view all the answers

<p>High acceleration due to high velocity and kinetic energy. (C)</p> Signup and view all the answers

<p>It significantly influences airflow efficiency and engine performance. (A)</p> Signup and view all the answers

<p>60 to 100 sparks per minute (B)</p> Signup and view all the answers

<p>6 months (A)</p> Signup and view all the answers

<p>Every 24 hours (D)</p> Signup and view all the answers

<p>Power lever position (C)</p> Signup and view all the answers

<p>Noise level decreases by 6dB (C)</p> Signup and view all the answers

<p>Contact Seal (C)</p> Signup and view all the answers

<p>Welded stainless steel sheets (C)</p> Signup and view all the answers

<p>It should be represerved (D)</p> Signup and view all the answers

<p>Calculate takeoff power rating (C)</p> Signup and view all the answers

<p>To prevent low filter icing (A)</p> Signup and view all the answers

<p>High weight ratio system (B)</p> Signup and view all the answers

<p>Decreases the freezing point of water (B)</p> Signup and view all the answers

<p>Electronic control amplifier (C)</p> Signup and view all the answers

<p>By averaging readings from all thermocouples (D)</p> Signup and view all the answers

<p>Titanium (B), Stainless Steel (C)</p> Signup and view all the answers

<p>Produce bleed air (C)</p> Signup and view all the answers

<p>Type K thermocouple (A)</p> Signup and view all the answers

<p>Automatic cut-off mechanism (D)</p> Signup and view all the answers

<p>Act as last chance filter before oil reaches bearings (D)</p> Signup and view all the answers

<p>It operates through mechanical hydraulics (B)</p> Signup and view all the answers

<p>N g tachometer (B)</p> Signup and view all the answers

<p>To convert kinetic energy into RAM pressure (B)</p> Signup and view all the answers

<p>It operates with 100% efficiency without heat loss (B)</p> Signup and view all the answers

<p>Greater pressure ratio (C)</p> Signup and view all the answers

<p>Disturbance in the instantaneous flow of air (A)</p> Signup and view all the answers

<p>It is more maintenance-friendly (B)</p> Signup and view all the answers

<p>To mix fuel and air (A)</p> Signup and view all the answers

<p>Intake guide vanes (IGV) (A)</p> Signup and view all the answers

<p>To prevent dirt particle injection into the engine (D)</p> Signup and view all the answers

<p>Loud bangs and changes in compression ratio (A)</p> Signup and view all the answers

<p>Forged aluminum (D)</p> Signup and view all the answers

A type of combustor used in both axial and centrifugal compressors, often referred to as a "basket". It features a ring-shaped combustion chamber with multiple "cans" containing fuel injectors.

A type of turbine blade that maintains the velocity and pressure of the hot gases while changing only the direction of flow.

A type of turbine blade where the velocity of hot gases increases as they flow through the blade, resulting in a pressure drop.

A system that controls the gap between the turbine blades and the casing to ensure efficient operation and prevent damage.

The component in a gas turbine engine that converts heat energy into kinetic energy (velocity) before the gas enters the turbine blades.

A type of pump that uses a mechanical displacement of fluid to create pressure.

A tool used to check and troubleshoot the temperature measuring system in a gas turbine engine without running the engine.

A device attached to turbine blades that increases the flow of cooling air into the nozzle.

A device located downstream of fuel burners in a jet engine that helps maintain a stable flame.

By calculating and measuring the RPM of the compressor, turbine, and fan.

A type of duct where the cross-sectional area decreases, resulting in increased air velocity and decreased pressure and temperature.

An inlet designed with a rounded, bell-like shape to minimize aerodynamic losses and maximize air intake efficiency by reducing restrictions.

The ability of an inlet duct to convert kinetic energy at the inlet into static pressure energy at the compressor inlet.

A type of compressor where air is compressed perpendicular to the longitudinal axis of the engine. It's often used in small engines where compressor ratio is less critical.

A phenomenon in centrifugal compressors where high blade tip speeds can lead to inefficiencies.

Air is compressed perpendicular to the engine's axis, generating centrifugal force that accelerates the air outwards before directing it into the combustion chamber.

A combustion chamber shaped like a can, where air enters through the front and is directed inside a liner.

Resistance produced by the inlet duct, both from its shape and from the air flow through it, affecting engine performance.

An electronic device that provides ignition sparks for the engine, using a transistor chopper circuit. This circuit has no moving parts, leading to a longer operating life.

The number of sparks produced per minute by the ignition unit, typically between 60 and 100 sparks per minute.

Maintaining the engine's condition when not in use, including humidity control and periodic inspections.

Determining engine speed by measuring the revolutions per minute (RPM) of the compressor, fan, and turbine.

Reducing engine noise using welded stainless steel sheets, which absorb sound.

Securely attaching the engine to the aircraft using bolts, nuts, and vibration dampening pads.

A valve that stops fuel flow to the engine, located after the fuel pump.

A device that releases excess pressure in a system, usually spring-loaded to close and connected to a control line for bearing lubrication.

The pressure rise inside an inlet duct during flight, caused by converting kinetic energy of the incoming air into potential energy.

An inlet duct that effectively converts kinetic energy into pressure energy, resulting in a significant increase in ram pressure.

A component in a gas turbine engine that changes the radial direction of airflow from the compressor to an axial direction.

Centrifugal compressors experience energy losses due to air expulsion, turning losses, and friction.

Axial compressors provide a greater pressure ratio compared to centrifugal compressors.

A theoretical compressor that operates at 100% efficiency, meaning no energy is lost due to friction, conduction, or turbulence.

The efficiency of a jet engine is determined by the ratio of the heat produced from burned fuel to the actual amount of fuel burned.

A condition where the compressor flow becomes unsteady, resulting in a sudden drop in pressure and thrust.

The rotating component in a centrifugal compressor that increases the velocity, pressure, and temperature of the air.

A sudden, severe disruption of airflow within the compressor, characterized by loud noise, hot gas expulsion, and loss of thrust.

At altitudes below 14,100 ft, the Full Authority Digital Engine Control (FADEC) calculates the engine's Take-Off Power rating.

At altitudes above 14,100 ft, the FADEC calculates the engine's Maximum Continuous Power rating.

If the engine is started without the EEC programming plug connected, the FADEC enters N1 mode.

FADEC controls fuel metering based on throttle position and N1 (engine speed), unless EPR (Engine Pressure Ratio) setting is used.

Fuel inhibitors are added to fuel to prevent corrosion, oxidation, and microbial growth.

PRIST (Pristine) is a fuel additive that combats ice formation and biological growth in fuel tanks.

A low-pressure fuel filter is installed between the fuel tank and the engine to remove large particles.

Fuel heaters prevent the low-pressure filter from icing up.

A high-pressure filter is located between the fuel pump and the fuel control unit.

A fine mesh filter, also called a 'last chance filter,' sits before the fuel spray nozzle to remove any remaining contaminants.

Either FADEC A or B automatically starts.

Whenever an engine or fuel control unit is replaced, rigging is required to ensure proper operation.

Rigging is also necessary if any component in the airframe control system is changed.

Fuel control units can be operated mechanically, hydraulically, electrically, or pneumatically.

The fuel flow coordinator works together with the propeller, electronic temperature datum control, and fuel control unit.