M15-2

Which of the following distance influences the field-of-view of a boroscope?. the distance from the boroscope tail to the subject being inspected. the distance from the boroscope tip to the subject being inspected. the distance from the distal end of the boroscope to the subject being inspected.

What does hot section inspection include?. the air intake. the whole compressor assembly. the combustion chambers, the turbine assemblies and the exhaust section.

How many categories are there to classify the compressor cleaning methods?. many different categories. three categories. two categories.

Which is one symptoms of engine stall?. N1 and N2 fluctuation. Low N1 and N2. High N1 and N2.

What does cold section inspection include?. the turbine assemblies and the exhaust section. the air intake and the whole compressor assembly. the combustion chambers.

Which is the function of a rapid throttle movements?. to ensure that the maximum temperature limitation is not exceeded. to avoid thermal stresses to engine. to check the acceleration and deceleration capabilities of the engine.

What does it mean high oil temperature reading?. Internal damage, such as an LP turbine failure. Bearing failure. Engine operational instability, such as surge.

What does high oil temperatures indicate?. Bearing failure, unintended leakage, malfunction of the engine oil cooler. Sump fire, intended leakage, malfunction of the hydraulic oil cooler. Bearing failure, sump fire, unintended leakage, malfunction of the engine oil cooler.

After the external inspection during the starting procedure of an engine what is required to do?. All non-essential systems are switched or selected on “OFF”. All non-essential systems are switched or selected on “IDLE. All non-essential systems are switched or selected on “ON”.

When does hung start occur?. when the engine completely stops accelerating toward idle. when the engine may spend a considerable time at very low RPM. when turbine temperatures may appear high.

Which substances are mixed with some anti-corrosive compounds?. with de-icing fluid. with air. with engine lubricating oil.

Where must be sprayed anti-corrosive compound in a gas turbine engine?. On turbine inlet sprayed, on exhaust area sprayed and on every small part of the engine subjected to corrosion with a brush. On compressor inlet sprayed, on exhaust area sprayed and on every small part of the engine subjected to corrosion with a brush. On compressor inlet sprayed, on turbine outlet sprayed and on every small part of the engine subjected to corrosion with a brush.

Which are the two sequences followed during the engine preservation procedure ?. long term preservation and very long term preservation. short term preservation and very short term preservation. short term preservation and long term preservation.

Which kind of material is used for the container employed for engine preservation?. rubber. cardboard. cardboard or metal.

Which is the average pore size of a desiccant?. 2,4 nanometres. 3,5 nanometres. 4,3 nanometres.

How does the gel appear if silica gel is mixed with cobalt chloride?. red. green. bright blue.

Where is used EICAS system?. Boeing Industries. Airbus Industries. Lockheed Martin industries.

What is EICAS (Electronic Information and Crew Alerting System)?. it is the system that enable the flight crew to monitor the engine parameters. it is the system to enable the flight crew to monitor the propeller parameters. it is not the same thing of ECAM.

What is the Engine Pressure Ratio (EPR)?. the parameter commonly used to calculated the thrust level. the parameter commonly used to calculated the heat level. the parameter commonly used to calculate the resistance level.

What does it mean the acronym ECAM?. Electronic Centralized Aircraft Maintenance. Electronic Centralized Aircraft Monitoring. Electronic Crew Alerting Monitor.

What is the JPT?. It is the temperature at the turbine outlet. It is the temperature at the exhaust gases. It is the temperature at the exhaust nozzle inlet.

What is the TGT?. It is the temperature of the gases inside the turbine. It is the temperature at the turbine inlet. It is the temperature inside the turbine at two significant stages.

How many kind of thermocouple is possible to recognize?. 4. 2. 3.

How can be decreased the interaction of the propellers?. there is no solution. by synchronizing and synchrophasing. by increasing the RPM value.

What is the Bourdon's tube?. It is a pipe usually utilized for the return line of the oil system. It is a gauge usually utilized for pressure measurements. It is a gauge usually utilized for temperature measurements.

What is JPT?. the temperature at the turbine inlet. the temperature at the turbine outlet. the temperature at the exhaust nozzle inlet.

What does it mean the acronym EICAS?. Electronic Information and Crew Alerting System. Electronic Information and Centralized Aircraft System. Electronic Information and Central Alerting System.

Which are the fundamental temperatures use in the evaluation of the correct operation of some engine components?. Jet Pipe Temperature and Exhaust Gas Temperature. Turbine Inlet Temperature and Turbine Outlet Temperature. Interstage Turbine Temperature (ITT) and Exhaust Gas Temperature (EGT).

Which of the following electrical powers is used to supply the alternating current powered instruments?. 26 Volt, 260 Hertz electrical power. 26 Volt, 400 Hertz electrical power. 40 Volt, 400 Hertz electrical power.

Which is the correct tension and frequency of electric power that must be supplied to AC instruments?. 26V 400 Hz. 26V 200 Hz. 28V 400 Hz.

Which is the primary function of the ignition system?. to ensure continuous relight, or relight when controlled, in flight. to ensure that the air-fuel mixture becomes ignited during the starting cycle. to ensure that the air-fuel mixture becomes ignited during the take off phase.

What do the cartridge starters use?. an explosive cartridge. an electrical power. air under pressure.

Which is the secondary function of the ignition system?. to ensure that the air-fuel mixture becomes ignited during the take off phase. to ensure continuous relight, or relight when controlled, in flight. to ensure that the air-fuel mixture becomes ignited during the starting cycle.

What does the starter disengagement depend on?. the method using by pilot. the type of airplane. the type and configuration of the engine.

Speaking about ignition system, how is possible to define the capacity?. It is the measure of the performance of an ignition system and the unit of measurement is [N]. It is the measure of the performance of an ignition system and the unit of measurement is [Watt]. It is the measure of the performance of an ignition system and the unit of measurement is [Joule].

What is the starting system?. It is the system that has the function to set the compressor in rotation by driving it in the initial phase. It is the system that provide the pre-heating of the cold airflow that enters the compressor. It is the system that operates inside the combustion chamber and provides for the initial ignition of the flame inside the chamber.

Which is the material used for the external body of an igniter plug?. Nickel. Chromium. Steel containing nickel and chromium.

How the direct cranking motor is protected from too high torque?. Through the use of a spring loaded valve. Through the use of a relief valve. Through the use of a clutch.

Which is the range of temperature and pressure of the air bled for air system for aircraft services supply?. 200-250 degrees Celsius and 295 kPa (50 PSI). 200-250 degrees Celsius and 275 kPa (40 PSI). 300-350 degrees Celsius and 275 kPa (40 PSI).

The cooling air flow in gas turbine engine is used to control what?. The turbine shafts and discs temperature cooling or heating them. The compressor shafts and discs temperature cooling them. The compressor shafts and discs temperature cooling or heating them.

Where are located bearing chambers?. in the air inlet of the engine. in the cooler regions of the engine. in the air transfer port of the engine.

Which is the temperature range that requires the anti-icing system activation?. is +6 degrees Celsius or less and the dew point is 10 degrees C. is +6 degrees Celsius or less and the dew point is 3 degrees C. is 10 degrees C or less and the dew point is 3 degrees C.