Mfe 2A651 Vol 1-5 Unit Review 100 Random Questions

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  • 1/525 Questions

    Which squadrons form a maintenance group?

    • Maintenance, operations, quality assurance.
    • Operations, aircraft maintenance, flying.
    • Quality assurance, support, aircraft maintenance.
    • Maintenance operations, maintenance, aircraft maintenance, and quality assurance.
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Mfe 2A651 Vol 1-5 Unit Review 100 Random Questions - Quiz
About This Quiz

This test is legit. You are dumb if you score less than a 95%

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  • 2. 

    When you are assigned to an aircraft maintenance squadron as an engine troop, to what flight will you most likely be assigned?

    • Debrief.

    • Training.

    • Specialist.

    • Deployment.

    Correct Answer
    A. Specialist.
    Explanation
    As an engine troop in an aircraft maintenance squadron, you will most likely be assigned to the specialist flight. This is because as an engine troop, your primary responsibility would be to specialize in the maintenance and repair of aircraft engines. Being assigned to the specialist flight would allow you to focus on your specific area of expertise and contribute to the overall maintenance and operational readiness of the squadron's aircraft.

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  • 3. 

    Toxic materials are easiest to get into the body and cause rapid toxic reactions when they

    • Aerosols.

    • Liquids.

    • Solids.

    • Gases.

    Correct Answer
    A. Gases.
    Explanation
    Toxic materials in the form of gases are the easiest to get into the body because they can be inhaled directly into the respiratory system. Gases can easily penetrate through the lungs and enter the bloodstream, allowing them to quickly reach various organs and cause toxic reactions. In contrast, aerosols, liquids, and solids may require additional pathways such as ingestion or absorption through the skin, which can be slower and less efficient in delivering toxic substances to the body.

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  • 4. 

    Who is responsible for providing you with training on how to wear, use, and maintain personal protective equipment?

    • Safety.

    • Your Mom.

    • Supervisor.

    • Environmental.

    Correct Answer
    A. Supervisor.
    Explanation
    The supervisor is responsible for providing training on how to wear, use, and maintain personal protective equipment. They are in charge of ensuring that employees understand and follow safety protocols to protect themselves in the workplace. Safety, environmental, and your mom are not responsible for providing this training.

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  • 5. 

    From what perspective does the RSS manage supply?

    • Base system.

    • Weapons system.

    • Inventory system.

    • Geographical system.

    Correct Answer
    A. Weapons system.
    Explanation
    The RSS manages supply from the perspective of the weapons system. This suggests that the RSS is responsible for ensuring the availability and maintenance of weapons and related equipment. This perspective implies a focus on managing the inventory, distribution, and maintenance of weapons to support operational readiness and effectiveness.

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  • 6. 

    Which item is one that a storage time period must be assigned to ensure that it will perform satisfactorily over a specified period of time?

    • Supply.

    • Shelf-life.

    • Inspection.

    • Bench stock.

    Correct Answer
    A. Shelf-life.
    Explanation
    Shelf-life is the correct answer because it refers to the length of time a product can be stored before it becomes unfit for use or consumption. Assigning a storage time period to an item ensures that it will be used or consumed within its specified shelf-life, thus guaranteeing satisfactory performance over that period. This is particularly important for perishable goods or items that may degrade or deteriorate over time.

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  • 7. 

    Which type of technical manual is divided into tasks that cover a particular maintenance action?

    • General equipment.

    • General system.

    • Fault isolation.

    • Job guide.

    Correct Answer
    A. Job guide.
    Explanation
    A job guide is a type of technical manual that is divided into tasks that cover a particular maintenance action. It provides step-by-step instructions and guidance for carrying out specific maintenance tasks. This type of manual is useful for technicians who need to perform maintenance actions on equipment or systems. It helps them understand the sequence of tasks involved in a particular maintenance action and ensures that they follow the correct procedures.

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  • 8. 

    The key to making the CEMS work is

    • Availability of engines and their parts.

    • Accurate and timely data at the lowest level.

    • Accurate and timely data at the highest level.

    • Availability of a storage and analysis computer.

    Correct Answer
    A. Accurate and timely data at the lowest level.
    Explanation
    The CEMS (Continuous Emissions Monitoring System) is dependent on accurate and timely data at the lowest level. This means that the system relies on collecting information from individual sources or components within the system, such as engines and their parts. This data is crucial for monitoring and analyzing emissions and ensuring compliance with environmental regulations. Without accurate and timely data at the lowest level, the CEMS would not be able to effectively monitor and manage emissions.

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  • 9. 

    What should you use for cleaning measuring tools?

    • Dry-cleaning solvent.

    • Turbo-super-carb.

    • Trychlorethlene.

    • WD–40.

    Correct Answer
    A. Dry-cleaning solvent.
    Explanation
    Dry-cleaning solvent is the correct answer because it is specifically designed for cleaning delicate fabrics and materials without causing damage. Measuring tools are often made of sensitive materials such as stainless steel or plastic, and using harsh chemicals like Turbo-super-carb or Trychlorethlene could potentially corrode or degrade the tools. WD-40, on the other hand, is a lubricant and not suitable for cleaning measuring tools. Therefore, dry-cleaning solvent is the most appropriate option for effectively and safely cleaning measuring tools.

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  • 10. 

    When operating a borescope, what part of the borescope illuminates the interior of the area you are inspecting?

    • Light guide tube.

    • Control unit.

    • Distal tip light guides.

    • Bending section lever.

    Correct Answer
    A. Distal tip light guides.
    Explanation
    The distal tip light guides illuminate the interior of the area being inspected when operating a borescope. These light guides are located at the distal end of the borescope and are responsible for providing the necessary light to visualize the inspection area.

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  • 11. 

    To prepare the engine fuel system for service after depreservation, you must flush the system with

    • Oil.

    • Fuel.

    • PD–680.

    • Calibration fluid.

    Correct Answer
    A. Fuel.
    Explanation
    To prepare the engine fuel system for service after depreservation, it is necessary to flush the system with fuel. This is because fuel is the appropriate substance to clean out any residual oil or contaminants that may have accumulated during the depreservation process. Flushing the system with fuel ensures that the engine fuel system is ready for operation and prevents any potential issues that could arise from using oil, PD-680, or calibration fluid.

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  • 12. 

    When metal is attacked by chemical corrosion, it will start

    • Deep within the metal.

    • On the surface of the metal.

    • Throughout the metal all at once.

    • Just under the surface of the metal.

    Correct Answer
    A. On the surface of the metal.
    Explanation
    When metal is attacked by chemical corrosion, it typically starts on the surface of the metal. This is because the surface of the metal is exposed to the external environment, where it can come into contact with corrosive substances such as moisture, acids, or salts. These corrosive substances react with the metal at the surface, causing it to corrode. As the corrosion progresses, it may eventually penetrate deeper into the metal, but it typically begins on the surface.

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  • 13. 

    On the personnel maintenance platforms, the purpose of the platform safety lockpins is to

    • Prevent the platform from lowering while it is in use.

    • Prevent the platform from swaying while it is in use.

    • Lock the base structure while the platform is in use.

    • Prevent the wheels from swiveling while it is in use.

    Correct Answer
    A. Prevent the platform from lowering while it is in use.
    Explanation
    The purpose of the platform safety lockpins is to prevent the platform from lowering while it is in use. This safety feature ensures that the platform remains at a stable height and does not accidentally lower, which could pose a risk to the personnel using it. By locking the platform in place, the lockpins provide an additional layer of security and prevent any unwanted movement while the platform is in use.

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  • 14. 

    Before inspecting new jet engine bearings, you should

    • Separate the halves.

    • Apply a preservative.

    • Perform a spin check.

    • Remove the preservative coating.

    Correct Answer
    A. Remove the preservative coating.
    Explanation
    Before inspecting new jet engine bearings, it is necessary to remove the preservative coating. This is because the preservative coating is applied to protect the bearings during storage and transportation. Removing the coating allows for a thorough inspection of the bearings to check for any damage or defects. By removing the preservative coating, any potential issues with the bearings can be identified and addressed before they are installed in the jet engine.

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  • 15. 

    What directs the gases onto the first-stage turbine wheel blades in a jet engine?

    • Flameholder.

    • Combustion chamber.

    • Turbine wheel blades.

    • Turbine stator.

    Correct Answer
    A. Turbine stator.
    Explanation
    The turbine stator directs the gases onto the first-stage turbine wheel blades in a jet engine. The stator is a stationary component of the turbine and its primary function is to guide and redirect the flow of gases from the combustion chamber towards the turbine blades. It helps to optimize the efficiency and performance of the turbine by ensuring that the gases are directed onto the blades at the correct angle and velocity, allowing for effective energy transfer and power generation.

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  • 16. 

    Which engine component meters fuel for combustion?

    • P&D valve.

    • Fuel pump.

    • Fuel control.

    • Fuel nozzles.

    Correct Answer
    A. Fuel control.
    Explanation
    The fuel control is responsible for metering the fuel for combustion in the engine. It regulates the flow of fuel based on the engine's needs, ensuring the correct amount of fuel is delivered to the combustion chamber. The P&D valve is not directly involved in metering fuel, but rather regulates the pressure and flow of fuel. The fuel pump is responsible for delivering fuel from the tank to the engine, but it does not meter the fuel. The fuel nozzles are responsible for injecting fuel into the combustion chamber, but they do not control the amount of fuel being delivered.

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  • 17. 

    To measure barometric pressure, you would use a

    • Potentiometer.

    • Psychrometer.

    • Pyrometer

    • Barometer.

    Correct Answer
    A. Barometer.
    Explanation
    A barometer is used to measure barometric pressure, which is the pressure exerted by the atmosphere. A potentiometer is an electrical device used to measure voltage or resistance, not pressure. A psychrometer is used to measure relative humidity. A pyrometer is used to measure high temperatures. Therefore, the correct answer is barometer.

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  • 18. 

    Which section of a jet engine keeps the compressor rotating?

    • Turbine.

    • Exhaust.

    • Diffuser.

    • Combustion.

    Correct Answer
    A. Turbine.
    Explanation
    The turbine section of a jet engine keeps the compressor rotating. As the hot gases from the combustion chamber pass through the turbine, they cause the turbine blades to spin. This rotational energy is then transferred to the compressor, which is connected to the turbine, keeping it rotating and allowing it to continue compressing air for the combustion process.

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  • 19. 

    In addition to the visual inspection the T–56 engine fuel nozzle also requires what type of inspection?

    • Nondestructive.

    • Spray pattern.

    • Pre-torque.

    • Ultrasonic.

    Correct Answer
    A. Spray pattern.
    Explanation
    The T-56 engine fuel nozzle requires a spray pattern inspection in addition to visual inspection. This means that apart from visually inspecting the nozzle, it is also necessary to check the pattern in which the fuel is being sprayed. This ensures that the fuel is being distributed evenly and properly, which is crucial for the engine's performance and efficiency.

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  • 20. 

    Once the cooling airflow has done its job of cooling the turbine section, where does it go?

    • Through a heat exchanger.

    • Out the turbine case bleed holes.

    • Into the gas stream to exit the engine.

    • Back to the compressor to be used again.

    Correct Answer
    A. Into the gas stream to exit the engine.
    Explanation
    The cooling airflow goes into the gas stream to exit the engine. This is because once the cooling airflow has cooled the turbine section, it is no longer needed and is expelled from the engine along with the exhaust gases.

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  • 21. 

    The term “No. 320 grit” refers to which feature of sandpaper?

    • Type.

    • Strength.

    • Coarseness.

    • Flexibility.

    Correct Answer
    A. Coarseness.
    Explanation
    The term "No. 320 grit" refers to the coarseness of the sandpaper. Grit is a measure of how rough or coarse the sandpaper is, with higher numbers indicating finer grits and lower numbers indicating coarser grits. In this case, "No. 320 grit" indicates that the sandpaper has a finer coarseness, making it suitable for smoother finishes or finer sanding tasks.

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  • 22. 

    Aircraft power plant and engine intermediate maintenance technical orders (TO) contain information on troubleshooting. This information is presented in the form of

    • Fix-it diagrams.

    • Power plant charts.

    • Mechanical drawings.

    • Troubleshooting charts.

    Correct Answer
    A. Troubleshooting charts.
    Explanation
    Aircraft power plant and engine intermediate maintenance technical orders (TO) contain information on troubleshooting, which is presented in the form of troubleshooting charts. These charts provide a systematic approach to identify and resolve issues that may arise during the maintenance or operation of the power plant and engine. They typically outline a series of steps or questions to help technicians diagnose and troubleshoot problems effectively. By referring to these troubleshooting charts, maintenance personnel can quickly and accurately identify the root cause of an issue and take appropriate corrective actions.

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  • 23. 

    To become an expert troubleshooter, you must

    • Be a 7-level.

    • Have at least 5 years experience.

    • Attend college courses in troubleshooting techniques.

    • Understand the function of each unit within each system.

    Correct Answer
    A. Understand the function of each unit within each system.
    Explanation
    To become an expert troubleshooter, it is crucial to understand the function of each unit within each system. This knowledge allows troubleshooters to identify and resolve issues effectively. While being a 7-level, having at least 5 years of experience, and attending college courses in troubleshooting techniques may contribute to expertise, understanding the function of each unit within each system is the most essential requirement. This understanding enables troubleshooters to analyze problems comprehensively and apply appropriate solutions, ensuring efficient troubleshooting and problem-solving.

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  • 24. 

    Most engine monitoring gauges and instruments require some type of

    • Electrical valve to the indicator.

    • Metal tubing for electron flow.

    • Radio frequency transmitter.

    • Transmitter and indicator.

    Correct Answer
    A. Transmitter and indicator.
    Explanation
    Most engine monitoring gauges and instruments require a transmitter and indicator. This is because the transmitter is responsible for converting the physical measurements, such as temperature or pressure, into electrical signals. These electrical signals are then sent to the indicator, which displays the readings in a format that can be easily interpreted by the user. Without both the transmitter and indicator, the engine monitoring system would not be able to accurately measure and display the necessary information.

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  • 25. 

    The engine fuel-flow indicating system of most jet powered aircraft contains a fuel-flow

    • Transmitter and a float valve.

    • Control valve and a float valve.

    • Transmitter and a fuel-flow indicator.

    • Control valve and a fuel-flow transcriber.

    Correct Answer
    A. Transmitter and a fuel-flow indicator.
    Explanation
    The engine fuel-flow indicating system of most jet powered aircraft consists of a fuel-flow transmitter and a fuel-flow indicator. The transmitter measures the rate at which fuel is flowing to the engine and sends this information to the indicator, which displays it to the pilot. This allows the pilot to monitor the fuel consumption of the engine and make adjustments as necessary.

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  • 26. 

    Two units that work together to indicate that the oil system is operating correctly are the oil pressure

    • Transmitter and indicator.

    • Relief valve and indicator.

    • Relief valve and transmitter.

    • Synchronous unit and indicator.

    Correct Answer
    A. Transmitter and indicator.
    Explanation
    The oil pressure transmitter and indicator are two units that work together to indicate the correct operation of the oil system. The transmitter measures the oil pressure and sends the signal to the indicator, which displays the pressure reading to the operator. This allows the operator to monitor the oil system and ensure that it is functioning properly.

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  • 27. 

    Which type of vibration transducer is made up of certain ceramic compounds and natural crystals?

    • Velocity.

    • Phase log.

    • Displacement accelerometer.

    • Piezoelectric accelerometer.

    Correct Answer
    A. Piezoelectric accelerometer.
    Explanation
    A piezoelectric accelerometer is made up of certain ceramic compounds and natural crystals. These materials have the property of generating an electric charge when subjected to mechanical stress or vibration. This charge is then converted into an electrical signal that can be measured and analyzed. Therefore, a piezoelectric accelerometer is the correct answer as it utilizes these materials to detect and measure vibrations.

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  • 28. 

    When an engine arrives for a test run at the test cell, it must

    • Only need replacement of minor parts.

    • Be operable with all known discrepancies corrected.

    • Have the fuel line disconnected from the pump inlet.

    • Be in need of only minor bits and pieces to be torqued.

    Correct Answer
    A. Be operable with all known discrepancies corrected.
    Explanation
    The correct answer is "be operable with all known discrepancies corrected." This means that when an engine arrives for a test run at the test cell, it should be in a condition where all known issues or problems have been fixed. This ensures that the engine is ready and able to be tested without any major issues or malfunctions.

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  • 29. 

    Responsibility for the proper preventive maintenance of a test cell facility rests with the

    • Individuals assigned.

    • Civil engineer squadron

    • Equipment maintenance squadron.

    • Aerospace ground equipment (AGE) flight.

    Correct Answer
    A. Individuals assigned.
    Explanation
    The correct answer is "individuals assigned." This means that the responsibility for the proper preventive maintenance of a test cell facility lies with the individuals who have been assigned to it. It is their duty to ensure that the necessary maintenance tasks are carried out to keep the facility in good working condition and prevent any potential issues or breakdowns. This answer implies that the responsibility is not solely on a specific squadron or flight, but rather on the individuals who have been given the task of maintaining the test cell facility.

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  • 30. 

    Using the wrong cleaning agent on a jet engine part

    • Has no effect.

    • Could destroy it.

    • Only causes minor etching.

    • Is acceptable as long as the part comes clean.

    Correct Answer
    A. Could destroy it.
    Explanation
    Using the wrong cleaning agent on a jet engine part could destroy it. Different cleaning agents have specific properties and are designed for specific materials and surfaces. Using the wrong cleaning agent can cause corrosion, erosion, or damage to the part's surface, leading to potential failure or malfunction of the jet engine. It is crucial to use the correct cleaning agent to ensure the longevity and proper functioning of the engine part.

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  • 31. 

    Which inspection is conducted by maintenance personnel after an occurrence of a specific or unusual condition?

    • Special.

    • Calendar.

    • Acceptance.

    • Time replacement item.

    Correct Answer
    A. Special.
    Explanation
    After an occurrence of a specific or unusual condition, maintenance personnel conduct a special inspection. This type of inspection is carried out to assess and address the specific or unusual condition that has occurred. It is different from regular inspections and is conducted to ensure that any necessary repairs or maintenance tasks are performed to address the specific condition and prevent any further issues.

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  • 32. 

    When a CIRF ships a replacement asset to a deployed unit, who is responsible for ensuring all appropriate documentation is completed?

    • Deployed unit.

    • CIRF personnel.

    • Supply squadron.

    • Transportation squadron.

    Correct Answer
    A. CIRF personnel.
    Explanation
    CIRF personnel are responsible for ensuring all appropriate documentation is completed when a replacement asset is shipped to a deployed unit. This includes verifying that all necessary paperwork, such as shipping documents and inventory records, are completed accurately and in a timely manner. It is their duty to ensure that the replacement asset is properly accounted for and that all necessary information is provided to the deployed unit for their records and operational requirements.

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  • 33. 

    You should record the removal and replacement of engine accessories on which one of the following AFTO Forms?

    • 25

    • 44

    • 95

    • 349

    Correct Answer
    A. 95
    Explanation
    The correct answer is 95. The AFTO Form 95 is used to record the removal and replacement of engine accessories. This form is specifically designed for documenting maintenance actions related to engine accessories, making it the appropriate choice for this task.

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  • 34. 

    What is the term for the process of producing voltage in a conductor when it passes through a magnetic field?

    • Static.

    • Electronics.

    • Mutual induction.

    • Electromagnetic induction.

    Correct Answer
    A. Electromagnetic induction.
    Explanation
    The term for the process of producing voltage in a conductor when it passes through a magnetic field is electromagnetic induction. This process occurs when there is a change in the magnetic field strength or when the conductor moves relative to the magnetic field. This phenomenon is the basis for the operation of generators and transformers.

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  • 35. 

    What is the main function of the MOC?

    • To check the aircraft forms and check with other personnel located around and onboard the aircraft.

    • To monitor and coordinate sortie production, maintenance production, and execution of the flying and maintenance schedules, and maintain visibility of fleet health indicators.

    • To ensure safe and healthy working conditions for all Air Force employees; its ultimate goal is to protect them from work-related deaths, injuries, and illnesses.

    Correct Answer
    A. To monitor and coordinate sortie production, maintenance production, and execution of the flying and maintenance schedules, and maintain visibility of fleet health indicators.
    Explanation
    The main function of the MOC is to monitor and coordinate sortie production, maintenance production, and execution of the flying and maintenance schedules, and maintain visibility of fleet health indicators. This means that the MOC is responsible for overseeing and managing the production and execution of flight and maintenance operations, ensuring that schedules are followed and fleet health is maintained.

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  • 36. 

    What type of training is provided to help you learn the knowledge portion of your job?

    • NCO academy.

    • On-the-job training.

    • Career development course.

    • Task qualification training.

    Correct Answer
    A. Career development course.
    Explanation
    A career development course is provided to help individuals learn the knowledge portion of their job. This type of training focuses on enhancing skills, knowledge, and abilities related to the specific career or job role. It provides employees with the necessary tools and resources to develop their careers and improve their performance in their current roles. This type of training often includes workshops, seminars, online courses, and other learning opportunities that are designed to enhance job-related knowledge and skills.

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  • 37. 

    You may attend the ALS after having how many months in the Air Force?

    • 24

    • 36

    • 48

    • 60

    Correct Answer
    A. 48
    Explanation
    In the Air Force, you are eligible to attend the Airman Leadership School (ALS) after completing 48 months of service. ALS is a professional military education program that enhances leadership skills and prepares airmen for supervisory roles. By completing 48 months, airmen have gained enough experience and knowledge to benefit from the training provided in ALS.

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  • 38. 

    FOD is normally caused by

    • People.

    • Animals.

    • Weather.

    • Mechanical failure.

    Correct Answer
    A. People.
    Explanation
    FOD, or Foreign Object Debris, is typically caused by people. This refers to any object, substance, or debris that is not part of an aircraft or its components, but can cause damage or pose a safety risk. Common examples include tools, loose hardware, or even trash left on runways or in maintenance areas. While animals, weather, and mechanical failure can also contribute to FOD incidents, the primary cause is human error, such as improper maintenance practices, failure to secure equipment, or negligence in cleaning up after work.

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  • 39. 

    What supports base-level technicians by providing technical assistance and performing any repairs beyond their responsibility/capability?

    • Field maintenance.

    • Depot maintenance.

    • Engine trending and diagnostics.

    • Engine life-cycle management planning.

    Correct Answer
    A. Depot maintenance.
    Explanation
    Depot maintenance supports base-level technicians by providing technical assistance and performing any repairs beyond their responsibility/capability. Depot maintenance refers to the level of maintenance performed at a central facility or depot, where highly skilled technicians and specialized equipment are available to handle complex repairs and maintenance tasks. This level of maintenance is necessary when base-level technicians are unable to handle the repairs or when the repairs require specialized knowledge and resources.

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  • 40. 

    What would you use to hold your tools when you cannot locate your toolbox within arm’s reach?

    • Ziplock bag.

    • Parts bag.

    • FOD bag.

    • Toolbag.

    Correct Answer
    A. Toolbag.
    Explanation
    When you cannot find your toolbox within arm's reach, the most logical solution would be to use a toolbag. A toolbag is specifically designed to hold and organize tools, making it the ideal option for storing and carrying tools when your toolbox is not readily available. A ziplock bag, parts bag, and FOD bag may not be suitable alternatives as they are not specifically designed for holding tools and may not provide the necessary organization and protection for your tools.

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  • 41. 

    Light is transmitted to the tip of a borescope by

    • The fiber optics.

    • An optical illusion bundle.

    • A grounded extension cord.

    • A directly magnified light source.

    Correct Answer
    A. The fiber optics.
    Explanation
    The correct answer is the fiber optics. Fiber optics is a technology that uses thin, flexible strands of glass or plastic to transmit light signals. In the case of a borescope, the light is transmitted to the tip of the device through these fiber optic strands, allowing for illumination of the area being inspected. This method is preferred for its flexibility, durability, and ability to transmit light over long distances without significant loss of intensity.

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  • 42. 

    Prior to removing a shipping container lid, what warning must be observed?

    • Ensure humidity indicator is blue.

    • Release all pressure before removing lid.

    • Loosen bolts in a staggered pattern to prevent warpage.

    • Ensure pressure is below 5 psi before loosening bolts.

    Correct Answer
    A. Release all pressure before removing lid.
    Explanation
    Before removing a shipping container lid, it is important to release all pressure. This is necessary to ensure the safety of the person opening the container and to prevent any potential accidents or injuries. By releasing the pressure, any built-up gases or pressure inside the container can be safely released, reducing the risk of sudden release or explosion when the lid is opened. This precaution is crucial in maintaining a safe working environment and preventing any potential hazards.

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  • 43. 

    Engines inactive for over 180 days must have what accomplished?

    • Motor the engine to circulate the oil.

    • Inspect reservoirs to ensure they are full.

    • Visually inspect compressor for corrosion.

    • Preservation run and fuel system preservation.

    Correct Answer
    A. Preservation run and fuel system preservation.
    Explanation
    Engines that have been inactive for over 180 days must have a preservation run and fuel system preservation accomplished. This is necessary to ensure that the engine remains in good condition and is ready for use after a long period of inactivity. The preservation run helps to circulate the oil and prevent any build-up or damage to the engine. The fuel system preservation ensures that the fuel remains stable and does not degrade over time, which could cause issues when the engine is started again.

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  • 44. 

    What is the most common type of fuel nozzle system?

    • Pressure-atomizing.

    • Fuel-blasting.

    • Fuel ejector.

    • Fuel tube.

    Correct Answer
    A. Pressure-atomizing.
    Explanation
    The most common type of fuel nozzle system is the pressure-atomizing system. This system uses a combination of high pressure and a small orifice to atomize the fuel into a fine mist. This mist then mixes with air to create a combustible mixture for combustion. Pressure-atomizing systems are widely used in various applications, including in gas turbines, industrial burners, and oil-fired boilers. They are preferred for their efficient fuel atomization, which leads to better combustion and reduced emissions.

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  • 45. 

    What is the total gear reduction ratio of the RGB?

    • 3.125:1.

    • 4.333:1.

    • 12.85:1.

    • 13.54:1.

    Correct Answer
    A. 13.54:1.
    Explanation
    The total gear reduction ratio of the RGB is 13.54:1. This means that for every 13.54 rotations of the input gear, the output gear will rotate once. This indicates that the RGB provides a significant reduction in speed and an increase in torque, making it suitable for applications that require high torque output.

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  • 46. 

    How many different types of loads can be imposed on a jet engine bearing?

    • 2

    • 3

    • 4

    • 5

    Correct Answer
    A. 3
    Explanation
    There are three different types of loads that can be imposed on a jet engine bearing.

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  • 47. 

    The bearing removal tools that are most commonly used include

    • Drift pipes and hammers.

    • Bearing pullers and hammers.

    • Drift pipes and arbor presses.

    • Arbor presses and bearing pullers.

    Correct Answer
    A. Arbor presses and bearing pullers.
    Explanation
    Arbor presses and bearing pullers are the most commonly used tools for bearing removal. Arbor presses are used to apply pressure and force to remove the bearing from its housing, while bearing pullers are designed specifically to grip and extract bearings. These tools provide efficient and effective methods for safely removing bearings without causing damage to the surrounding components.

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  • 48. 

    Fuel that accumulates after a failed start is

    • Returned to the fuel control by tubes.

    • Drained overboard by a drain system.

    • Burned on the next start attempt.

    • Allowed to evaporate.

    Correct Answer
    A. Drained overboard by a drain system.
    Explanation
    After a failed start, the fuel that accumulates is not suitable for use in the engine. Therefore, it needs to be removed from the system. The most efficient way to do this is by draining the fuel overboard using a drain system. This ensures that the contaminated fuel is safely discarded and does not affect the performance or reliability of the engine.

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  • 49. 

    Stationary vanes positioned between rotor discs in a compressor are used to

    • Direct air and increase pressure.

    • Direct hot gases rearward.

    • Increase backup pressure.

    • Prolong compressor life.

    Correct Answer
    A. Direct air and increase pressure.
    Explanation
    The stationary vanes positioned between rotor discs in a compressor are used to direct air and increase pressure. These vanes help to guide the air flow and redirect it towards the rotor discs, which then further compress the air. By directing the air and increasing the pressure, the vanes play a crucial role in the overall efficiency and performance of the compressor.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 04, 2012
    Quiz Created by
    Mikey_1412
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