PP 12

Where does a mechanic find the appropriate main. Scheduled. Most comply with manufacturers specification. In the general aircraft handbook.

In a successful start the EGT will. Decrease when idle is rpm is reached. Increase steadily during idle.

A hot start is when EGT. Exceeds limits. Remains below normal operating range.

A false start is indicated when engine. Light up but the rpm does not increase. Fails to ignite at all.

On start up, when should fuel be put on. When engine reaches to 10 to 15% rpm. Immediately at the beginning of start.

Where is the most wear in a turbine engine. Compressor. Turbine section.

If a gas turb. Eng. has been operated about 85%RPM for periods exceeding 1 min. in the last 5 min. prior to shutdown it shld be operated at idle for a period of 5 min. to. Prevents possible seizure of rotor. Reduce fuel consumption.

When starting a hot engine on a cold day the pilots report no power turbine reading. Pilot would suspect. Power turbine n2 blades tip rubbing. Low fuel pressure.

To correct for operating temp. deficiencies a mechanic may. Vary exhaust nozzle with inserts or restrictions. Increase fuel flow rate only.

If air is taken from a gas turbine engine for anti-icing the air is usually taken from. Compressor. Turbine exhaust.

A mechanic notices 2 blades in a compressor are bent beyond limits. He should. Send it to the manufacturer for repair. Straighten the blades manually.

If an oil cooler where to bypass where will be the oil be directed. Back to the tank. Directly to the engine sump.

Engine starter generators are. Permentally geared to the engine or transmission. Only engaged during start.

N1 tach generator is what type of motor*. 3 phase ac generator. Dc generator.

What type of pump is generally used to supply a fuel at a const. flow to the FCU. EDP. Gear pump.

EPR is the ratio of. Turbine out/compressor inlet. Compressor outlet/turbine inlet.

Turbine blades moments are measured in. Inch-ounce. Pound-inch.

2 types of turbine ignition. High & low volt. High & medium volt.

Purpose of stator vanes in axial flow compressors. To direct air flow. To increase turbine speed.

Main power source used to drive variable stator vanes. FCU. Hydraulic pump.

Turbine blade attachment method. Firtree. Pin and slot.

When will a typical eng starter disengage. At self-accelerating eng speed is reached, normaly 30 sec. When fuel lever is advanced.

In a free turbine turboshaft engine, how much energy available from the combustion process is used by the gas generator. 66%. 50%.

Turbofan engine with 3:1 bypass ratio is a. Medium bypass. Low bypass.

When heated air leaves the combustion chamber it passes thru the turbine where?. Press. dec. & vel. inc. Press. inc. & vel. dec.

Purpose of intermediate gearbox? Helicopter. To obtain necessary reduction for accessories. To increase rotor rpm.

Percentage division and function of primary & secondary thru combustor. 25-35% primary & 65-75% for cooling. 50% primary & 50% secondary.

In a reverse flow combustor, the airflow enters chamber. From the rear. From the front.

Max thrust rating for normal climb. Normal rated. Maximum rated.

Torque shaft arrangement for torquemeter readings. Torquemeter signal is developed by means of magnetic pickups mounted over the teeth of the torque (inner) shaft and reference (outer) shaft flanges. By measuring direct torque on the main shaft.