2A251 Volume 2 UREs

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| By Catherine Halcomb
Catherine Halcomb
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  • 1/90 Questions

    Which of the following actions is not a required action when working around moving machinery?

    • Wearing loose, comfortable clothing
    • Buttoning your shirt cuffs
    • Taking off your rings
    • Taking off your watch
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2A251 Quizzes & Trivia

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  • 2. 

    The variables upon which radiation hazards depend does not include which of the following?

    • Time of exposure

    • Strength of emission

    • Experience of the operator

    • Number of units operating in the area

    Correct Answer
    A. Experience of the operator
    Explanation
    The variables upon which radiation hazards depend include time of exposure, strength of emission, and number of units operating in the area. However, the experience of the operator is not a variable that directly affects radiation hazards. While an experienced operator may have better knowledge and skills to handle radiation equipment safely, it does not directly impact the hazards themselves.

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  • 3. 

    Who ensures the job control number is entered on the Air Force Technical Order (AFTO) Form 781A?

    • Technician

    • Supervisor

    • Crew chief

    • Aircrew member

    Correct Answer
    A. Technician
    Explanation
    The technician ensures that the job control number is entered on the Air Force Technical Order (AFTO) Form 781A. This is because the technician is responsible for completing and documenting maintenance activities, including filling out the necessary forms and ensuring all required information is accurately recorded. The job control number is an important identifier for tracking and managing maintenance tasks, so it is crucial for the technician to enter it correctly on the AFTO Form 781A.

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  • 4. 

    Which Air Force Technical Order (AFTO) form allows you to record essential inspection and delayed maintenance data?

    • 781A

    • 781B

    • 781K

    • 781L

    Correct Answer
    A. 781K
    Explanation
    The correct answer is 781K. The AFTO form 781K is used to record essential inspection and delayed maintenance data in the Air Force. This form is specifically designed for recording maintenance actions that are not completed within the required timeframe. It allows technicians to document the reasons for the delay and any additional information related to the inspection or maintenance. By using the 781K form, the Air Force can ensure that all necessary data is recorded accurately and efficiently.

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  • 5. 

    Which portion of the tag is used to provide a "cross-check" with the aircraft forms and is inserted through the aircraft forms binder?

    • The bottom portion

    • The top portion

    • Neither

    • Both

    Correct Answer
    A. The bottom portion
    Explanation
    The bottom portion of the tag is used to provide a "cross-check" with the aircraft forms and is inserted through the aircraft forms binder. This suggests that the bottom portion contains important information that needs to be cross-checked with the aircraft forms, indicating that it plays a crucial role in ensuring accuracy and consistency in the documentation process.

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  • 6. 

    Which action could pose a safety hazard to personnel in an electrostatic discharge (ESD)

    • Use of ionizers

    • Wearing of personal clothing

    • Improper use of conductive bags

    • Improper use of conductive tote boxes

    Correct Answer
    A. Use of ionizers
    Explanation
    The use of ionizers in an electrostatic discharge (ESD) environment could pose a safety hazard to personnel. Ionizers are designed to neutralize static charges in the air, but if not properly maintained or used incorrectly, they can generate high levels of ozone or release particles that can be harmful to human health. Therefore, the use of ionizers without proper precautions and training can potentially endanger the safety of personnel in an ESD setting.

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  • 7. 

    Which type of cable is used to carry radio frequency (RF) power from one point to another?

    • Electromagnetic pulse (EMP)

    • Coaxial

    • Shielded

    • Insulated wire

    Correct Answer
    A. Coaxial
    Explanation
    Coaxial cable is used to carry radio frequency (RF) power from one point to another. It consists of a central conductor, surrounded by an insulating layer, a metallic shield, and an outer insulating layer. The design of the coaxial cable allows for efficient transmission of RF signals without interference or loss of power. The shielded construction helps to minimize signal loss and external interference, making coaxial cable the ideal choice for carrying RF power.

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  • 8. 

    Which structural area is designed to allow maintenance personnel to inspect or service aircraft components?

    • Doors

    • Nacelles

    • Windows

    • Plates and skins

    Correct Answer
    A. Doors
    Explanation
    Doors are designed to allow maintenance personnel to inspect or service aircraft components. They provide access to the interior of the aircraft, allowing technicians to easily reach and examine various systems and components. Doors are typically located in strategic areas of the aircraft, such as the fuselage, wings, or landing gear, to ensure easy access for maintenance purposes. By opening the doors, technicians can perform inspections, repairs, or routine maintenance tasks on the aircraft's components, ensuring their proper functioning and safety.

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  • 9. 

    What happens when radiofrequency (RF) energy is absorbed in the tissue of your body?

    • Nothing

    • Heat is produced

    • Your heart beats irregularly

    • Your internal organs start deteriorating

    Correct Answer
    A. Heat is produced
    Explanation
    When radiofrequency (RF) energy is absorbed in the tissue of your body, it leads to the production of heat. RF energy is a form of electromagnetic radiation that can penetrate the body and cause molecules in the tissue to vibrate, resulting in the generation of heat. This heat production can have various effects on the body, such as warming the surrounding tissues and potentially causing damage if the temperature rises significantly.

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  • 10. 

    The maximum noise level that is considered to be relatively safe is

    • 75 dBA (decibels)

    • 84 dBA

    • 96 dBA

    • 100 dBA

    Correct Answer
    A. 84 dBA
    Explanation
    The correct answer is 84 dBA because it falls within the range of noise levels that are considered relatively safe. Noise levels above 85 dBA can cause hearing damage with prolonged exposure, so 84 dBA is just below that threshold. It is important to note that even though 84 dBA is considered relatively safe, it is still recommended to limit exposure to loud noises and use hearing protection when necessary to prevent any potential damage to hearing.

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  • 11. 

    When is the thruflight (TH) inspection performed?

    • After the last flight of the day

    • Before the aircraft goes on alert

    • Prior to takeoff and at intermediate stops

    • After a specific number of flying hours has elapsed

    Correct Answer
    A. Prior to takeoff and at intermediate stops
    Explanation
    The thruflight (TH) inspection is performed prior to takeoff and at intermediate stops. This means that the inspection is conducted before the aircraft departs for its next flight and also during any scheduled stops along the way. This ensures that the aircraft is thoroughly checked and any necessary maintenance or repairs can be carried out before continuing the journey. Performing the inspection at these specific times helps to ensure the safety and airworthiness of the aircraft throughout its flight operations.

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  • 12. 

    When the home station check (HSC) inspection becomes due during a long range mission, it is completed at the base

    • To which the aircraft belongs

    • Where the first intermediate stop is made

    • From which the mission is being performed

    • Nearest the aircraft when the inspection becomes due

    Correct Answer
    A. To which the aircraft belongs
    Explanation
    The correct answer is "to which the aircraft belongs". This means that when the home station check inspection is due during a long-range mission, it is completed at the base where the aircraft is registered or belongs to. This ensures that the inspection is carried out by the appropriate personnel who are familiar with the aircraft and its maintenance history.

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  • 13. 

    Which type of information is required in the correction active block of the Air Force Technical Order (AFTO) Form 781A?

    • Description of the corrective action

    • Technical order references

    • Techician's signature

    • Supervisor's signature

    Correct Answer
    A. Description of the corrective action
    Explanation
    In the correction active block of the Air Force Technical Order (AFTO) Form 781A, the required information is the description of the corrective action. This is important because it provides a clear and detailed account of the steps taken to correct any issues or problems identified. It helps to ensure that the necessary actions have been taken and allows for proper documentation and tracking of the corrective measures implemented. The description of the corrective action provides valuable information for future reference and analysis.

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  • 14. 

    Which Air Force Technical Order (AFTO) form is used to document aerospace vehicle time and engine data to include operating time?

    • 781A

    • 781J

    • 781K

    • 781L

    Correct Answer
    A. 781J
    Explanation
    The correct answer is 781J. The AFTO 781J form is used to document aerospace vehicle time and engine data, including operating time. This form is specifically designed for recording and tracking the usage and maintenance of aircraft and their engines. It provides a comprehensive record of the aircraft's operating hours, cycles, and other important data.

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  • 15. 

    Twisting an optic fiber during installation or maintenance results in

    • Stretching of the glass fibers

    • Greater elasticity of the glass fibers

    • Reduced optical power transmission

    • Good tension control preventing loose or uneven standing

    Correct Answer
    A. Reduced optical power transmission
    Explanation
    Twisting an optic fiber during installation or maintenance can cause the glass fibers within the fiber to become stretched. This stretching can disrupt the alignment of the fibers, leading to increased signal loss and reduced optical power transmission. Therefore, the correct answer is reduced optical power transmission.

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  • 16. 

    When you are performing electrical soldering, you should always use which particular type of solder?

    • Rosin core

    • Acid core

    • Hard

    • Soft

    Correct Answer
    A. Rosin core
    Explanation
    When performing electrical soldering, it is important to use rosin core solder. Rosin core solder contains a flux core made of rosin, which helps to remove oxidation and promote good solder flow. This type of solder is specifically designed for electrical work and is commonly used for soldering wires, circuit boards, and other electronic components. Acid core solder, on the other hand, is not suitable for electrical soldering as it contains corrosive acid flux, which can damage electronic components. Hard and soft solder are not specifically designed for electrical work and may not provide the same level of reliability and conductivity as rosin core solder.

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  • 17. 

    Proper care of an electric soldering iron involves

    • Cooling the iron by dipping in water

    • Jerking the iron to remove excess solder

    • Tapping an iron on a table to remove excess solder

    • Keeping iron in a proper holder when you are not using it

    Correct Answer
    A. Keeping iron in a proper holder when you are not using it
    Explanation
    Keeping an electric soldering iron in a proper holder when not in use is important for proper care because it ensures that the iron is stored safely and prevents it from causing any accidental damage or injuries. Placing the iron in a holder also helps to protect the soldering tip from being damaged or contaminated, which can affect its performance. Additionally, storing the iron in a holder prevents it from coming into contact with flammable materials or causing any fire hazards.

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  • 18. 

    Before performing any type of wire repair, you must consult the procedures in technical order (TO)

    • 1-1A-14

    • 1-1A-15

    • 1-1A-16

    • 1-1A-18

    Correct Answer
    A. 1-1A-14
    Explanation
    The correct answer is 1-1A-14 because it is stated in the question that before performing any type of wire repair, one must consult the procedures in technical order (TO). Therefore, the correct technical order to consult for wire repair would be 1-1A-14.

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  • 19. 

    The greatest noise levels around an operating jet aircraft engine is located to the rear of the engine though an angle of how many degrees on either side?

    • 30°

    • 45°

    • 60°

    • 90°

    Correct Answer
    A. 45°
    Explanation
    The correct answer is 45°. The greatest noise levels around an operating jet aircraft engine are located to the rear of the engine through an angle of 45° on either side. This means that the noise is most intense within a 90° cone behind the engine.

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  • 20. 

    Which units fall under the programmed depot maintenance (PDM) inspection concept?

    • ACC

    • AMC

    • AFSOC

    • All units regardless of MAJCOM

    Correct Answer
    A. All units regardless of MAJCOM
    Explanation
    The programmed depot maintenance (PDM) inspection concept applies to all units regardless of MAJCOM. This means that all units, regardless of their Air Combat Command (ACC), Air Mobility Command (AMC), or Air Force Special Operations Command (AFSOC) affiliation, are subject to PDM inspections. The PDM inspection concept is not limited to specific units or commands, but rather encompasses all units in the Air Force.

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  • 21. 

    Malfunctions documented on the Air Force Technical Order (AFTO) Form 244, Equipment Maintenance Record, are the responsibility of

    • Aerospace Ground Equipment (AGE) mechanics

    • Flight line technicians

    • Propulsion mechanics

    • Avionics backshop personnel

    Correct Answer
    A. Aerospace Ground Equipment (AGE) mechanics
    Explanation
    AFTO Form 244 is used to document malfunctions in equipment maintenance. Aerospace Ground Equipment (AGE) mechanics are responsible for maintaining and repairing ground equipment used in aviation operations. Therefore, it can be inferred that they would be the ones responsible for addressing the malfunctions documented on the AFTO Form 244.

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  • 22. 

    Except for battle damage, each discrepancy discovered is documented on the Air Force Technical Order (AFTO) Form

    • 781A

    • 781B

    • 781K

    • 781L

    Correct Answer
    A. 781A
    Explanation
    The correct answer is 781A because the statement mentions that each discrepancy discovered is documented on the Air Force Technical Order (AFTO) Form. Among the options given, the AFTO Form 781A is specifically used for documenting discrepancies and corrective actions for aircraft maintenance. Therefore, it is the most appropriate choice.

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  • 23. 

    To "flag" a condition on an aircraft that could cause damage or injury if ignored, you would use which form?

    • AFTO form 244

    • AFTO Form 781K

    • AF Form 1492, WARNING TAG

    • AF Form 979, DANGER TAG

    Correct Answer
    A. AF Form 1492, WARNING TAG
    Explanation
    The AF Form 1492, WARNING TAG, would be used to "flag" a condition on an aircraft that could cause damage or injury if ignored. This form serves as a visual warning to alert personnel of potential dangers and prompt them to take appropriate action to prevent accidents or further damage.

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  • 24. 

    Shielded cable consists of

    • A metallic braid over the insulation

    • A metal conductor covered with a dielectric

    • An inner conductor separated by an insulation dielectric

    • A compact wire bundle with self-contained wire assemblies

    Correct Answer
    A. A metallic braid over the insulation
    Explanation
    Shielded cable consists of a metallic braid over the insulation to provide electromagnetic shielding. This shielding helps to prevent external electromagnetic interference from affecting the signals transmitted through the cable. The metallic braid acts as a barrier, blocking or absorbing the electromagnetic waves and preventing them from interfering with the signal. This ensures that the signal remains clear and free from any external disturbances, making shielded cable suitable for applications where signal integrity is crucial, such as in data transmission or sensitive electronic equipment.

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  • 25. 

    Rosin core flux must be used for electrical soldering because it has

    • Softer materials

    • Harder materials

    • Noncorrosive effects

    • A lower melting point

    Correct Answer
    A. Noncorrosive effects
    Explanation
    Rosin core flux must be used for electrical soldering because it has noncorrosive effects. When soldering electrical components, it is important to use a flux that does not corrode or damage the materials being soldered. Rosin core flux, which is a type of soldering flux, is specifically designed to be noncorrosive, ensuring that it does not cause any harm to the electrical components. This helps to maintain the integrity and functionality of the soldered connections, making it a suitable choice for electrical soldering applications.

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  • 26. 

    Which major aircraft structural area provides support for engines?

    • Wings

    • Nacelles

    • Fuselage

    • Stabilizers

    Correct Answer
    A. Nacelles
    Explanation
    Nacelles are the correct answer because they are the major aircraft structural area that provides support for engines. Nacelles are the streamlined enclosures on an aircraft that house the engines. They are typically attached to the wings or fuselage and provide support and protection for the engines.

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  • 27. 

    Which structural area is not considered a major aircraft structural area?

    • Windows

    • Fuselage

    • Stabilizers

    • Wing carry-through

    Correct Answer
    A. Wing carry-through
    Explanation
    The wing carry-through is not considered a major aircraft structural area. The major structural areas of an aircraft typically include the fuselage, stabilizers, and wings. The wing carry-through refers to the structure that connects the wings to the fuselage, providing support and stability. While it is an important component, it is not considered a major structural area on its own.

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  • 28. 

    Which physical symptom is least likely to indicate that a person is suffering from overexposure to noise?

    • Nausea

    • Vomiting

    • Dizziness

    • Unconsciousness

    Correct Answer
    A. Unconsciousness
    Explanation
    Unconsciousness is the least likely physical symptom to indicate overexposure to noise. While prolonged exposure to loud noise can cause symptoms such as nausea, vomiting, and dizziness, unconsciousness is not typically associated with noise exposure. Unconsciousness is more commonly linked to other factors such as head trauma, lack of oxygen, or certain medical conditions. Therefore, if a person is experiencing unconsciousness, it is unlikely to be solely caused by overexposure to noise.

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  • 29. 

    Which inspection is designed to reduce the time an aircraft is out of commission for any given inspection?

    • Major

    • Phase

    • Preflight

    • Hourly postflight

    Correct Answer
    A. Phase
    Explanation
    The phase inspection is designed to reduce the time an aircraft is out of commission for any given inspection. Unlike major inspections, which require extensive maintenance and can take the aircraft out of service for a longer period, phase inspections are more routine and can be completed more quickly. By conducting phase inspections, aircraft can undergo regular maintenance and checks without causing significant downtime, ensuring that they remain operational for a longer period.

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  • 30. 

    Which Air Force Technical Order (AFTO) form is used to document maintenance status and servicing information of the aircraft?

    • 781A

    • 781B

    • 781H

    • 781J

    Correct Answer
    A. 781H
    Explanation
    The correct answer is 781H. The Air Force Technical Order (AFTO) form 781H is used to document the maintenance status and servicing information of the aircraft. This form is specifically designed for recording historical maintenance data, including scheduled and unscheduled maintenance actions, inspections, and servicing performed on the aircraft. It provides a comprehensive record of the maintenance history, allowing for effective tracking and analysis of the aircraft's maintenance status.

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  • 31. 

    The accumulation of an electrical charge on the surface of a material is referred to as static

    • Cling

    • Discharge

    • Generation

    • Electricity

    Correct Answer
    A. Electricity
    Explanation
    The accumulation of an electrical charge on the surface of a material is referred to as electricity. This is because electricity is the flow of electric charge, and when charge accumulates on the surface of a material, it creates an electrical charge. Static electricity is a term used to describe this accumulation of charge, which can occur through various processes such as friction, induction, or contact. The term "cling" refers to sticking or adhering to something, "discharge" refers to the release of accumulated charge, and "generation" refers to the production or creation of something, but neither of these terms specifically describe the accumulation of an electrical charge on a material's surface.

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  • 32. 

    Which of the following is not a radiofrequency (RF) connector precaution?

    • Never step on the cable

    • Ensure a good grip when using pliers

    • Ensure you solder double shielded cables together

    • Ensure you do not exceed the bend radius of the cable

    Correct Answer
    A. Ensure a good grip when using pliers
    Explanation
    This answer is correct because ensuring a good grip when using pliers is not specifically related to radiofrequency (RF) connector precautions. The other options mentioned are all precautions that should be taken when dealing with RF connectors.

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  • 33. 

    Crimping tools were developed to ensure crimps

    • Are properly stripped

    • Are insulated correctly

    • Could be quickly accomplished

    • Have a good mechanical connection

    Correct Answer
    A. Have a good mechanical connection
    Explanation
    Crimping tools were developed to provide a secure and reliable mechanical connection. By using these tools, the crimps can be tightly compressed, ensuring that the wires or connectors are securely joined together. This helps to prevent any loose connections or disconnections, which can lead to faulty electrical connections or potential hazards. The crimping process also helps to maintain the integrity of the connection over time, ensuring a long-lasting and efficient electrical connection.

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  • 34. 

    You are repairing damaged copper foil tape on an electrimagnetic pulse (EMP) hardened cable, which type of tape would you use as the final wrap to the repaired area?

    • Monel shielding

    • Copper shielding

    • Silicone self-bonding

    • Pressure sensitive polyester

    Correct Answer
    A. Silicone self-bonding
    Explanation
    Silicone self-bonding tape would be the ideal choice for the final wrap to the repaired area of the damaged copper foil tape on an electromagnetic pulse (EMP) hardened cable. This type of tape is known for its self-adhesive properties and ability to bond to itself, creating a secure and durable seal. It is also resistant to extreme temperatures, moisture, and chemicals, making it suitable for protecting the repaired area from further damage or environmental factors. Additionally, silicone self-bonding tape offers excellent electrical insulation properties, which is crucial for maintaining the integrity of the EMP hardened cable.

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  • 35. 

    The impedance of a radio frequency (RF) transmission line and load do not match. In addition, the reflected wave and the applied wave are on the line at the same time and are creating a wave that is stationary on the line. What is this stationary wave called?

    • Traveling

    • Standing

    • Reflected

    • Resultant

    Correct Answer
    A. Standing
    Explanation
    When the impedance of a RF transmission line and load do not match, a portion of the transmitted wave is reflected back towards the source. This creates interference between the reflected wave and the applied wave, resulting in a stationary wave pattern known as a standing wave. In a standing wave, certain points along the transmission line experience maximum and minimum amplitudes, creating areas of constructive and destructive interference. This phenomenon is commonly observed in RF systems and can cause signal degradation or other issues.

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  • 36. 

    Which type of inspection is a flight preparedness check?

    • Phase

    • Preflight

    • End-of-runway

    • Basic postflight

    Correct Answer
    A. Preflight
    Explanation
    A flight preparedness check is a type of inspection that is conducted before a flight takes off. This inspection is performed to ensure that the aircraft is in proper working condition and ready for flight. It involves checking various components and systems of the aircraft, such as the fuel, oil, landing gear, and controls. The purpose of this inspection is to identify any potential issues or problems that may affect the safety or performance of the aircraft during the flight. Therefore, the correct answer is "Preflight."

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  • 37. 

    Which type of inspection is designed to detect defects that might have developed during ground operation of the aircraft?

    • Phase

    • Preflight

    • End-of-runway

    • Basic postflight

    Correct Answer
    A. End-of-runway
    Explanation
    End-of-runway inspection is designed to detect defects that might have developed during ground operation of the aircraft. This type of inspection is conducted after the aircraft has completed its taxiing and is ready for takeoff. It involves a thorough inspection of the aircraft's exterior, including checking for any signs of damage, loose parts, or fluid leaks. This inspection ensures that the aircraft is in proper working condition before it takes off, minimizing the risk of any potential defects causing issues during the flight.

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  • 38. 

    One way of pressure and moisture sealing the back of a connector is to use

    • Silicone tape

    • Silicone caulking

    • Heat shrinkable tape

    • Electrical wrapping tape

    Correct Answer
    A. Silicone tape
    Explanation
    Silicone tape is a suitable option for pressure and moisture sealing the back of a connector. Silicone tape is known for its excellent sealing properties, as it creates a tight and waterproof seal when wrapped around the connector. It is also flexible and can conform to the shape of the connector, ensuring a secure and effective seal. Additionally, silicone tape is resistant to high temperatures and UV rays, making it durable and long-lasting. Therefore, silicone tape is a reliable choice for pressure and moisture sealing in connector applications.

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  • 39. 

    The heat and air pressure required for proper installation of heat shrink products is controlled by the

    • Tool operator

    • Air/nitrogen regulator

    • Temperature controller

    • Tubular heating element

    Correct Answer
    A. Tool operator
    Explanation
    The tool operator is responsible for controlling the heat and air pressure required for proper installation of heat shrink products. They have the knowledge and expertise to adjust the temperature controller and air/nitrogen regulator to the appropriate levels. The tool operator also operates the tubular heating element, which provides the necessary heat for the shrinkage process. Therefore, the tool operator plays a crucial role in ensuring the correct heat and air pressure for successful installation of heat shrink products.

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  • 40. 

    Which display is not part of an engine indicating system?

    • Fuel flow

    • Oil quantity

    • Engine vibration

    • Water temperature

    Correct Answer
    A. Water temperature
    Explanation
    The water temperature display is not part of an engine indicating system because it is not directly related to the functioning or performance of the engine. Engine indicating systems typically include displays for fuel flow, oil quantity, and engine vibration, as these parameters directly affect the engine's operation. Water temperature, on the other hand, is more relevant to the cooling system of the engine rather than its direct operation.

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  • 41. 

    When approaching overheated aircraft wheels, always approach the wheel

    • From the side of the wheel

    • At a 45° angle to the wheel

    • From the front or behind the wheel

    • Only after the blowout screen is in place

    Correct Answer
    A. From the front or behind the wheel
    Explanation
    When approaching overheated aircraft wheels, it is recommended to approach from the front or behind the wheel. This is because approaching from the side of the wheel or at a 45° angle to the wheel can put the person at risk of being in the path of a potential blowout. Approaching from the front or behind the wheel allows for a safer distance and reduces the risk of injury in case of a blowout.

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  • 42. 

    Which amplitude-modulated (AM) transmitter stage isolates the master oscillator from the multiplier and amplifier load?

    • Buffer amplifier

    • Audio amplifier

    • Power amplifier

    • Frequency multiplier

    Correct Answer
    A. Buffer amplifier
    Explanation
    A buffer amplifier is used in an AM transmitter stage to isolate the master oscillator from the multiplier and amplifier load. It acts as a buffer between the oscillator and the load, preventing any interference or distortion caused by the load from affecting the oscillator. This ensures that the oscillator operates independently and provides a stable and clean signal to the multiplier and amplifier stages.

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  • 43. 

    Which condition helps to dissipate and lessen the effects of electrostatic discharges?

    • Using nonconducting packaging materials

    • Using proper insulating materials

    • Dehumidified air

    • Humid air

    Correct Answer
    A. Humid air
    Explanation
    Humid air helps to dissipate and lessen the effects of electrostatic discharges. When the air is humid, it contains water molecules which can conduct electricity. This helps to neutralize any electrostatic charges that may be present, reducing the likelihood of a discharge occurring. In contrast, dry air can increase the buildup of static electricity and make it more likely for a discharge to happen. Therefore, maintaining a humid environment can be beneficial in minimizing the effects of electrostatic discharges.

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  • 44. 

    Which option is not a flight line precaution used to protect electrostatic discharge sensitive (ESDS) components?

    • Using protective tote boxes

    • Covering line replaceable unit (LRU) connector plugs

    • Touching the ends of aircraft wiring to the LRU case prior to installation

    • Touching the LRU case with your hands prior to removal from the aircraft

    Correct Answer
    A. Using protective tote boxes
  • 45. 

    Which feature is not an advantage of fiber optic cables over copper wire?

    • Immunity to electromagnetic interference

    • Low attenuation

    • Light weight

    • Cost

    Correct Answer
    A. Cost
    Explanation
    Fiber optic cables have several advantages over copper wire, including immunity to electromagnetic interference, low attenuation, and light weight. However, one disadvantage of fiber optic cables is their higher cost compared to copper wire.

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  • 46. 

    Which type of solderless connector is used to permit easy and efficient connections to electrical equipment?

    • Splice

    • Terminal lug

    • Connector splice

    • Connector plug pins

    Correct Answer
    A. Terminal lug
    Explanation
    A terminal lug is a type of solderless connector that is used to permit easy and efficient connections to electrical equipment. It is designed to securely connect wires to terminals or electrical devices without the need for soldering. Terminal lugs are commonly used in electrical installations, automotive wiring, and industrial applications. They provide a reliable and durable connection, ensuring proper conductivity and reducing the risk of loose or faulty connections.

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  • 47. 

    Which of the following is not considered to be a general precaution when lacing or tying wire groups or bundles?

    • Lace or tie bundles tightly enough to prevent slipping

    • Tie all wire groups or bundles twelve inches or less apart

    • Do not use ties on any part of a wire group or bundle that is located inside a conduit

    • When tying wire bundles behind connectors, start ties far enough back from the connector to avoid playing (spreading) of contacts

    Correct Answer
    A. Tie all wire groups or bundles twelve inches or less apart
    Explanation
    The other options provide general precautions for lacing or tying wire groups or bundles, such as preventing slipping, avoiding the use of ties inside a conduit, and starting ties far enough back from connectors to avoid spreading of contacts. However, tying all wire groups or bundles twelve inches or less apart is not considered a general precaution. This may actually be too close and could lead to tangling or interference between the wires.

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  • 48. 

    How does independent positioning determine subsystems function of aircraft systems?

    • By recording radar data

    • By calculating aircraft velocity

    • Independent of inertial navigation

    • Independent of ground equipment

    Correct Answer
    A. Independent of ground equipment
    Explanation
    Independent positioning determines the subsystems function of aircraft systems by being able to operate without relying on any ground equipment. This means that the aircraft's systems can function autonomously, without the need for external support or guidance. This independence allows for greater flexibility, reliability, and efficiency in the operation of the aircraft systems, as they are not reliant on external factors or equipment.

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  • 49. 

    The Air Force Technical Order (AFTO) Form 781-series would not be used to document aircraft

    • Inspections

    • Flight records

    • Configurations

    • Component repairs

    Correct Answer
    A. Component repairs
    Explanation
    The Air Force Technical Order (AFTO) Form 781-series is a documentation form used in the Air Force to record various aspects of aircraft maintenance and operations. However, it would not be used to document component repairs. This is because component repairs require more detailed and specific documentation, which is typically done through separate forms or procedures. The AFTO Form 781-series is more commonly used for inspections, flight records, and configurations, as these can be easily recorded and tracked using this standardized form.

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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
  • Mar 25, 2016
    Quiz Created by
    Catherine Halcomb

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