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What is the purpose of a variable area nozzle in a gas turbine engine, and how does it influence engine performance?

• To mix fuel with incoming air

• to control the speed of the compressor

• to regulate the temperature of the combustion chamber

• to adjust the expansion area for optimal efficiency

Which component of the lubrication system is responsible for scavenging excess oil from the engine?

• Oil Filter

• Oil Pump

• Oil Cooler

• Scavange Pump

What role does the fuel-cooled oil cooler play in a jet engine's cooling system?

• it cools the engine's compressor blades

• it cools the engine's combustion chamber

• it regulates the flow of cooling air over the engine components

• it removes excess heat from the engine oil by passing it throught a heat exchanger

Which component of the lubrication system is responsible for scavenging excess oil from the engine?

• Oil filter

• Oil pump

• Oil cooler

• Scavange Pump

Air turbine starter generally incorporate a reduction gear to convert the?

• High speed low torque of the turbine wheel to a low speed high torque to the output shaft.

• High speed low torque of the compressor wheel to a low speed high torque of the turbine

• Low speed high torque of the turbine wheel to the high speed low torque of the output shaft

• High speed low torque of the turbine wheel to a low speed high torque of the compressor

Which component of a jet engine control system is responsible for regulating the engine's RPM?

• Throttle lever

• Fuel control unit

• Engine pressure ratio gauge

• Tachometer

What is the typical outcome of an engine health monitoring system detecting aan abnormal engine condition?

• immediate engine shutdown

• issue a maintenance alert for further inspection

• automatic adjustment of engine parameters to correct the condition

• activation of engine fire suppression system

What role does the nozzle serve in a gas turbine engine?

• to control the flow of air into the engine

• to direct the flow of exhaust gases and increasae their velocity

• to mix air and fuel before combustion

• to regulate the temperature of the exhaust gases

During which stroke of the four-stroke cycle does the crankshaft reach its top dead center(TDC) position in an aircraft piston engine?

• exhaust stroke

• intake stroke

• compression stroke

• power stroke

What role does the fuel pump serve in an aircraft engine fuel system?

• to pressurize the fuel for injection into the combustion chamber

• to mix air and fuel in the carburetor

• to regulate the flow of fuel to the engine

• to prevent vapor lock in the fuel lines