FCC Engines Portion

Multiple Choice

Which of the following statements is true about the F117 engine configuration?

• It is a single spool, radial flow engine.

• It is a dual spool, axial flow, high bypass ratio turbofan engine.

• It is a triple spool, centrifugal flow engine.

• It is a single spool, high bypass ratio engine.

Multiple Choice

What is the main function of the Low Pressure Compressor (N1) in the F117 engine?

• To ignite the fuel-air mixture

• To compress incoming primary and secondary air

• To cool the exhaust gases

• To provide lubrication to the engine

Multiple Choice

What is the main function of the High Pressure Turbine (HPT) in a jet engine?

• To supply the turning force for the high-pressure compressor

• To provide power for the aircraft accessories

• To control the engine electronically

• To supply fuel to the engine

Multiple Choice

The combination of HPC and HPT are referred to as the ___ (core speed).

• N2
• N1

• Compressor

• Turbine

Multiple Select

Which of the following statements about the Low Pressure Turbine (LPT) are correct?

• It supplies turning force for the LPC through the inner shaft

• It has five stages

• It is part of the seven total stages in the turbine

• It is driven by the N2 compressor

Multiple Choice

What is the primary purpose of the Engine Electronic Control (EEC) system in an aircraft engine?

• To monitor and control all engine functions

• To supply fuel to the engine

• To drive the engine accessories

• To provide hydraulic power

Multiple Select

Which of the following are true about the electrical connectors on the EEC?

• There are 12 electrical connectors in total

• Six connectors are blue and represent the 'A' channel

• One connector is red and used for power

• Six connectors are green and represent the 'B' channel

Multiple Choice

What is the purpose of combining blue (W1) and green (W2) wires in the EEC system?

• To form the W34 harness for redundancy

• To increase voltage

• To reduce resistance

• To provide power to the EEC

Multiple Choice

How many modes of operation does the EEC have?

• 1

• 2

• 3

• 4

Multiple Choice

At what N2 percentage does the EEC alternator begin providing power to the EEC?

• 5%

• 10%

• 15%

• 20%

Multiple Choice

What happens if channel “A” of the EEC fails due to PMA power loss?

• The MASTER CAUTION light is illuminated and the engine reverts to N1 mode.

• The engine shuts down immediately.

• The oil system is activated.

• The fuel system is bypassed.

Open Ended

Explain the purpose and function of the lube and scavenge oil pump in the engine oil system.

Multiple Choice

Where is the oil tank mounted in the aircraft oil system?

• To the fan exit case at approximately the 7:00 position.

• To the engine intake at 12:00 position.

• To the wing root at 3:00 position.

• To the tail section at 9:00 position.

Multiple Choice

What is the primary purpose of the fuel oil heat exchanger in the engine oil system?

• To heat fuel and cool engine/IDG oil.

• To increase oil pressure in the tank.

• To filter contaminants from the oil.

• To store excess fuel.

Multiple Choice

What sends power to the FCU start solenoid during engine start?

• Maintenance panel rotary switch

• Engine Shutoff Switch

• EEC start switch

• Start Switch (push button)

Multiple Choice

How many fuel nozzles are on one F117 engine?

• 4

• 8

• 12

• 24

2.5 Bleed Valve cont.

-Fail-safed open from start to Idle and during surge detection
-Bleed ring is closed once throttles are advanced forward
-An opened valve reduces backpressure on LPC

Multiple Choice

What is the purpose of the ACC system?

• To increase fuel usage and engine thrust

• To reduce blade tip clearance

• Increase efficiency by warming the compressor case

• Preventing engine surges by increasing blade tip clearance

Multiple Choice

How many TOTAL T/R actuators are there on one F117 Engine?

• 2

• 4

• 6

• 8