Motor GEnx

What is the role of the centrifugal boost pump in the main fuel pump (MFP). To send the fuel to the FMU. To cool the fuel. To cool the filter fuel.

When does the EEC energize the igniter during start?. At 10% N2 rotation. At 33% N2 rotation. At 62% N2 rotation.

What is used to balalnce the fan?. A computerized system that adjust the blade angles. Aset of gear inside the spinner. Balance weights on the Aft end of the spinner.

What are the stages 1, 2 and 5 of the HPC known as?. Rotors. Individually bladed spools. Blisks.

How many stages of compression does the high pressure compressor HPC have?. 10. 12. 4.

What does the booster anti-ice BAI system consist of?. Core compartment coolin valve and turbine clearance control valves. Variable stator vane actuator and transient bleed valve. BAI valve, BAI sensor, and BAI duct.

how is the number 1 fan blade identified?. By special color on the blade tip. By a dimple on the spinner cone. By a unique shape compared to others blades.

Where are the external bleed air ports located on the compressor case?. Stage 3 and 6. Stage 4 and 7. Stage 2 and 5.

What is the purpose of the FMV during start?. To provide electrical power to the engine. To monitor the engine parameters. To control the fuel flow.

Which stages of the HPC have variable stator vanes VSV?. Stages 5 to 7. Stages 1 to 4. Stages 6 to 10.

How many fuel nozzles are there in the system?. 22. 10. 30.

What does the flow split valve FSV do?. Acts as a flow distributor. Filters the fuel. Measures the fuel flow.

What materials are the fan blades made of?. Aluminum ans steel. Carbon fiber reinforced plastic CFRP with titanium edges. Stainless steel.

What is the purpose of the transient bleed system. To bleed HPC 10th stage air overboard during engine start and fast deceleration. To increase engine thrust during take off. To cool the engine during high power operations.

What is the maximun volume of the oil tank and to what level is a typically filled?. 25.6 US US quarts maximun, filled to 20 quarts. 30.4 US quarts maximun, filled to 25.6 quarts. 28.8 liters maximun, filled to 24.2 liters.

Where is the oil sent after being cooled by the heat exchengers?. To the engine bearing chambers and gearboxes. Through the debris monitoring system. Directly back to the oil tank.

Where are the manual drive units locted on the T/R?. On the lower locking actuators. On the synchonization shaft. On the upper actuators.

What additional cooling does the engine air cooled oil cooler ACOC provide?. It supplies more oil cooling al low engine speeds. It is the primary source of the engine oil cooling. It sipplies more oil cooling al high engine speeds.

How many fan blades does the GE engine have?. 18. 24. 36.

What is the pressure ratio of the HPC?. 23:1. 10:1. 15:1.