2A553B Vol. 2 Pretest

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Quizzes Created: 6 | Total Attempts: 2,788
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1. (229) Corrosion prevention is the responsibility of...

Explanation

The correct answer is everyone involved in the maintenance of aerospace equipment. Corrosion prevention is a collective responsibility that should be shared by all individuals involved in the maintenance of aerospace equipment. This includes not only supervisors and squadron commanders but also sheet metal shop personnel and anyone else who plays a role in the maintenance process. Corrosion prevention is crucial to ensure the longevity and reliability of aerospace equipment, and it requires a collaborative effort from all individuals involved.

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About This Quiz
Air Force Quizzes & Trivia

The 2A553B Vol. 2 Pretest assesses knowledge on Air Force inspection concepts, types of inspections, and specific procedural standards.

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2. (207) What portion of an AF Form 1492, Warning Tag, is used to provide a "cross-check" with the aircraft forms and is inserted through the aircraft forms binder?

Explanation

The bottom portion of an AF Form 1492, Warning Tag, is used to provide a "cross-check" with the aircraft forms and is inserted through the aircraft forms binder. This means that the bottom part of the form is inserted into the binder, allowing for easy verification and comparison with the other aircraft forms.

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3. (221) If a tool is not found on an aircraft after a thorough search, place a red...

Explanation

If a tool is not found on an aircraft after a thorough search, it is important to indicate this in the aircraft forms. Placing an X in the aircraft forms is the correct way to do this. This helps to keep a record of the missing tool and ensures that it is not mistakenly left on the aircraft, which could potentially cause damage or safety issues.

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4. (226) One of the most common lock wiring mistakes a new avionics technician makes is...

Explanation

One of the most common lock wiring mistakes a new avionics technician makes is safety wiring something backward. This means that they incorrectly secure the wire or fastener by twisting it in the wrong direction, which can lead to the wire becoming loose or undone. This mistake can compromise the integrity and safety of the aircraft's components and systems. It is important for avionics technicians to be meticulous and double-check their work to ensure that safety wiring is done correctly.

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5. (227) The single most important contributor to corrosion in avionics systems is...

Explanation

Moisture is the single most important contributor to corrosion in avionics systems. Moisture can cause the formation of rust and oxidation on metal surfaces, leading to the degradation of electrical connections and components. It can also promote the growth of fungi and bacteria, further accelerating corrosion. Temperature and pressure variations can also contribute to corrosion, but moisture is considered the primary factor due to its ability to facilitate chemical reactions that lead to corrosion. Solder, on the other hand, is not a significant contributor to corrosion in avionics systems.

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6. (248) What component on a helicopter produces a sideways thrust to counteract torque?

Explanation

The tail rotor on a helicopter produces a sideways thrust to counteract torque. Torque is generated by the main rotor as it spins, causing the helicopter body to rotate in the opposite direction. The tail rotor, located at the end of the tail boom, generates a sideways force that counteracts this torque, allowing the helicopter to maintain stability and control its direction of flight. Wing fairings, blades, and the main rotor do not produce sideways thrust to counteract torque.

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7. (217) What is of the utmost importance in the soldering process?

Explanation

In the soldering process, cleanliness is of the utmost importance. This is because any dirt, debris, or oxidation on the surfaces being soldered can interfere with the formation of a strong and reliable bond. Cleanliness ensures proper adhesion and conductivity between the components being soldered, resulting in a successful solder joint. Therefore, maintaining a clean work area, cleaning the surfaces to be soldered, and using clean soldering tools are crucial for achieving high-quality solder connections.

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8. (230) All components of the computer connect in some way to the...

Explanation

All components of the computer connect in some way to the motherboard. The motherboard is the main circuit board of a computer and it provides a platform for all other components to connect to. It houses the CPU, memory, and other essential components, and also provides slots and connectors for peripherals such as the monitor, keyboard, and hard drive to connect to the system. Therefore, the motherboard is the central hub that allows all components to communicate and work together effectively.

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9. (204) When the home station check becomes due during a mission, the inspection is performed...

Explanation

The correct answer is "upon completion of that mission." This means that the home station check is performed after the mission has been finished. This allows for any necessary inspections or maintenance to be done before the aircraft is used again. It ensures that the aircraft is in proper working order and ready for the next mission.

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10. (207) To "flag" a condition on an aircraft that could cause damage or injury if ignored, use an...

Explanation

To "flag" a condition on an aircraft that could cause damage or injury if ignored, the appropriate form to use is the AF Form 1492, Warning Tag. This form is specifically designed to indicate potential hazards or dangers that need immediate attention. It serves as a visual reminder to personnel that there is a problem that should not be ignored and requires immediate action to prevent any further damage or injury.

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11. (249) What system provides aircraft cabin pressurization?

Explanation

Air conditioning is responsible for providing aircraft cabin pressurization. This system ensures that the cabin is maintained at a comfortable pressure level, similar to the atmospheric pressure at lower altitudes. It regulates the air pressure inside the cabin to prevent discomfort and health issues for passengers and crew members during flight. The air conditioning system also controls the temperature and humidity levels inside the cabin, enhancing the overall comfort of the aircraft's occupants.

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12. (253) Which is not one of the forces at work on an aircraft in flight?

Explanation

Deceleration is not one of the forces at work on an aircraft in flight. Lift is the upward force that counteracts gravity and allows the aircraft to stay airborne. Thrust is the forward force that propels the aircraft through the air. Gravity is the downward force that pulls the aircraft towards the Earth. However, deceleration refers to the act of slowing down or decreasing speed, which is not a force acting on the aircraft during normal flight.

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13. (206) Who ensures the job control number (when assigned) is entered on the AFTO Form 781A?

Explanation

The crew chief ensures that the job control number (when assigned) is entered on the AFTO Form 781A. This is because the crew chief is responsible for overseeing the maintenance and repair of the aircraft, and the job control number is used to track and document the specific tasks performed on the aircraft. By entering the job control number on the form, the crew chief ensures that the maintenance actions are properly recorded and can be easily referenced in the future.

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14. (206) If you find a malfunction during an operational check, how do you document this malfunction of the AFTO Form 781A?

Explanation

When conducting an operational check and encountering a malfunction, it should be documented on the AFTO Form 781A by signing off as OPS CK BAD and entering the new malfunction. This indicates that the operational check was not successful and there is a new issue that needs to be addressed. This allows for proper tracking and documentation of the malfunction for further investigation and maintenance purposes.

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15. (222) The most widely used hammer by aircraft mechanics is the...

Explanation

Aircraft mechanics commonly use a ball-peen hammer because of its versatility and effectiveness in their work. The ball end of the hammer allows for precise and controlled striking, making it suitable for shaping and forming metal components. Additionally, the flat end of the hammer can be used for striking and driving tasks. The ball-peen hammer's design and weight make it ideal for aircraft maintenance as it can withstand heavy use without damaging delicate parts or surfaces.

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16. (232) In the number 305.8410, the numeral 4 represents the...

Explanation

In the number 305.8410, the numeral 4 is the least significant digit. The least significant digit is the digit that has the least value and is positioned furthest to the right. In this case, the digit 4 is in the decimal portion of the number, which is the least significant part compared to the whole number portion.

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17. (257) The C-5 primary flight control system consists of the aileron, elevator, and...

Explanation

The C-5 primary flight control system consists of the aileron, elevator, and rudder systems. The ailerons control the roll of the aircraft, the elevators control the pitch, and the rudder controls the yaw. These three systems work together to provide the pilot with control over the aircraft's movements in different axes. Therefore, the correct answer is rudder systems.

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18. (216) For electrical soldering, always use...

Explanation

Rosin core solder is the correct choice for electrical soldering because it contains a flux core made of rosin, which helps to remove oxidation and improve the flow of solder. This type of solder is specifically designed for electronics and electrical connections, providing a reliable and durable joint. Acid core solder, on the other hand, is typically used for plumbing and should not be used for electrical work as it can damage components. Hard solder requires high temperatures and is not suitable for delicate electrical connections, while soft solder has a lower melting point and is commonly used for plumbing and general soldering applications.

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19. (228) What type of corrosion occurs when dissimilar metals are in contact and an external circuit is provided by the presence of moisture?

Explanation

Galvanic corrosion occurs when two dissimilar metals are in contact with each other and an external circuit is provided by the presence of moisture. This type of corrosion happens because of the electrochemical potential difference between the two metals. The more active metal acts as an anode and corrodes, while the less active metal acts as a cathode and remains protected. This process leads to the deterioration of the anode, causing galvanic corrosion.

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20. (201) The normal inspection work card deck must be completed upon termination of the contingency, during increased readiness, or at the expiration of the authorized usage period as directed by the...

Explanation

The normal inspection work card deck must be completed upon termination of the contingency, during increased readiness, or at the expiration of the authorized usage period as directed by the major command. This means that it is the responsibility of the major command to determine when the normal inspection work card deck should be completed in these specific situations. The legal office, wing safety office, and Department of Defense do not have the authority to direct when the deck should be completed.

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21. (202) When is the thruflight inspection performed?

Explanation

The thruflight inspection is performed prior to takeoffs at intermediate stops. This means that before the aircraft continues its journey after making a stop, a thorough inspection is conducted to ensure that everything is in proper working order. This helps to identify any potential issues or maintenance needs before the aircraft takes off again, ensuring the safety of the flight and passengers.

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22. (210) Which type of cable is used to carry radio-frequency power from one point to another?

Explanation

Coaxial cable is used to carry radio-frequency 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 coaxial cable allows for the transmission of high-frequency signals with minimal interference and loss. It is commonly used in various applications, including television and radio broadcasting, internet connectivity, and telecommunications.

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23. (216) Flux is designed to...

Explanation

Flux is a substance used in soldering to prevent oxidation of metal surfaces. When metal is heated during soldering, it can react with oxygen in the air and form oxides, which can hinder the formation of a strong bond. Flux acts as a barrier, preventing oxygen from reaching the metal and thus preventing the formation of oxides. This ensures that the electrical connection remains clean and free from any interference caused by oxidation. Therefore, the correct answer is "prevent oxygen from combining with metal."

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24. (224) What fasteners are normally used for securing components to a panel?

Explanation

Dzus fasteners are commonly used for securing components to a panel. They are a type of quick-release fastener that provides a secure and reliable connection. Dzus fasteners consist of a receptacle and a stud, which can be easily engaged and disengaged by sliding the stud into the receptacle and turning it. This allows for quick and easy installation and removal of components, making Dzus fasteners a popular choice in industries such as aviation and automotive where frequent access to components is required.

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25. (225) Whick lock wire method is most appropriate for hard-to-reach or closely grouped parts?

Explanation

The single-twist lock wire method is the most appropriate for hard-to-reach or closely grouped parts because it requires less space compared to other methods. In this method, the wire is twisted around the bolt or fastener in a single loop, providing secure locking without taking up much space. This makes it ideal for situations where there is limited access or when parts are closely positioned, allowing for effective lock wire installation even in tight spaces.

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26. (233) The number 1012 represents the...

Explanation

The number 1012 is a binary number because it consists of only two digits, 0 and 1. In the binary numbering system, each digit represents a power of 2, with the rightmost digit representing 2^0, the next digit representing 2^1, and so on. Therefore, the number 1012 can be expanded as (1 * 2^3) + (0 * 2^2) + (1 * 2^1) + (0 * 2^0), which equals 8 + 0 + 2 + 0 = 10 in decimal form.

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27. (205) Acceptance inspections are performed when...

Explanation

Acceptance inspections are performed when newly assigned equipment arrives. This means that when equipment is received for the first time, it goes through an acceptance inspection to ensure that it meets the required standards and specifications. This inspection is important to verify that the equipment is in proper working condition and ready to be used. It helps to identify any defects or issues with the equipment before it is put into service.

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28. (206) When an authorized individual has made sufficient investigation to justify that an aerospace vehicle is safe for flight, what block on the AFTO Form 781H is signed?

Explanation

When an authorized individual has conducted a thorough investigation and determined that an aerospace vehicle is safe for flight, they sign the "Exceptional release" block on the AFTO Form 781H. This indicates that the vehicle has met all necessary requirements and can be released for flight without any concerns regarding safety.

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29. (218) What precaution must you adhere to prior to applying heat shrink?

Explanation

Prior to applying heat shrink, it is important to adhere to the precaution of reading all procedures in TO 1-1A-14. This ensures that you have a complete understanding of the correct techniques and safety measures involved in the heat shrink process. By familiarizing yourself with the procedures, you can avoid any potential mistakes or accidents that may occur when using heating tools on aircraft.

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30. (223) What tool measures the specific degree of tightness of nuts or bolts?

Explanation

A torque wrench is a tool specifically designed to measure the specific degree of tightness of nuts or bolts. It applies a predetermined amount of torque to the fastener, allowing the user to tighten it to the required specifications. This ensures that the fastener is neither too loose nor too tight, preventing potential damage or failure. A stress kit, bolt meter, and tensiometer are not typically used for measuring the tightness of nuts or bolts, making them incorrect options.

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31. (254) The point at which all three axes of an aircraft meet is the center of...

Explanation

The point at which all three axes of an aircraft meet is known as the center of gravity. This is the point where the total weight of the aircraft is considered to be concentrated. It is an important concept in aviation as it affects the stability and maneuverability of the aircraft. By understanding the center of gravity, pilots and engineers can ensure that the aircraft is properly balanced and can make adjustments as needed to maintain stability during flight.

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32. (210) Electromagnetic pulse cable was developed with how many outer protective layers?

Explanation

The correct answer is 3. This means that the electromagnetic pulse cable was developed with three outer protective layers.

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33. (213) Time domain reflectometers can test cables as long as...

Explanation

Time domain reflectometers (TDRs) are used to test the quality and integrity of cables. They work by sending a signal down the cable and measuring the time it takes for the signal to reflect back. The longer the cable, the longer it takes for the signal to return. TDRs are designed to accurately measure cables up to a certain length. In this case, the correct answer is 2,000 feet, indicating that TDRs can effectively test cables up to that length.

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34. (219) Heat and air pressure required for proper installation of heat-shrink products is controlled by the...

Explanation

The correct answer is the tool operator. The heat and air pressure required for proper installation of heat-shrink products are controlled by the tool operator. This means that the person operating the tool is responsible for adjusting and maintaining the appropriate heat and air pressure levels to ensure the heat-shrink products are installed correctly.

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35. (222) When a screwdriver blade becomes nicked or the edges become rounded, it should be...

Explanation

When a screwdriver blade becomes nicked or the edges become rounded, it should be reground or filed. This is because a nicked or rounded blade can lead to slipping and cause damage to the screw or the surrounding materials. By regrounding or filing the blade, the sharpness and effectiveness of the screwdriver can be restored, ensuring proper functionality and preventing accidents or damage.

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36. (236) The major difference between the octal, decimal, and binary numbering systems is the...

Explanation

The major difference between the octal, decimal, and binary numbering systems is the base. Each numbering system has a different base, which determines the number of digits used and the value associated with each digit. The octal system has a base of 8, the decimal system has a base of 10, and the binary system has a base of 2. This means that in the octal system, there are 8 possible digits (0-7), in the decimal system there are 10 possible digits (0-9), and in the binary system there are 2 possible digits (0-1). The base of a numbering system affects how numbers are represented and manipulated within that system.

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37. (246) Synchro stator windings are placed...

Explanation

Synchro stator windings are placed 120 degrees apart. This is because synchro stators are used in electrical machines, such as motors or generators, to produce a rotating magnetic field. By placing the stator windings 120 degrees apart, it creates a balanced and evenly distributed magnetic field, which helps in achieving smooth and efficient operation of the machine. This arrangement ensures that the magnetic field is evenly distributed across the rotor, resulting in better torque production and reduced vibration.

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38. (250) Which is not a one of the general types of radio installed on aircraft?

Explanation

Low frequency is not one of the general types of radio installed on aircraft. Aircraft radios typically operate in high-frequency, very-high frequency, and ultra-high frequency ranges. Low frequency radio waves have longer wavelengths and are not suitable for long-range communication, making them less practical for aircraft use.

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39. (251) When approaching overheated aircraft wheels, always approach the wheel...

Explanation

When approaching overheated aircraft wheels, it is recommended to approach from the front of or behind the wheel. This is because approaching from the side of the wheel can put you at risk of being struck by any debris or fragments that may be expelled from the overheated wheel. By approaching from the front or behind, you are reducing the chances of being hit by any potential hazards.

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40. (209) What type of ground should be provided for soldering irons in an electrostatic discharge protected area?

Explanation

In an electrostatic discharge protected area, a hard ground should be provided for soldering irons. This is because a hard ground provides a direct connection to the earth, which helps to dissipate any static charges that may be present. This grounding method ensures that any static electricity is safely discharged, preventing damage to sensitive electronic components and equipment.

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41. (216) Utilizing exact dimensions for stripping wire ensures...

Explanation

Utilizing exact dimensions for stripping wire ensures a proper connection. When stripping wire, it is important to remove the insulation without damaging the conductor. By using the exact dimensions, the wire is stripped to the appropriate length, allowing for a secure and reliable connection. This ensures that the wire can be properly inserted into connectors or terminals, creating a solid electrical connection.

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42. (202) What type of inspection is a flight preparedness check?

Explanation

A flight preparedness check is a type of inspection that is conducted before a flight to ensure that the aircraft is in a safe and operational condition. This inspection is known as a preflight inspection, which involves a thorough examination of the aircraft's systems, controls, and overall condition. It is done to identify any potential issues or discrepancies that may affect the safety or performance of the aircraft during the flight.

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43. (208) An example of an electrostatic discharge sensitivity device is a...

Explanation

A programmable read-only memory (PROM) circuit is an example of an electrostatic discharge sensitivity device because it is highly sensitive to electrostatic discharge (ESD). ESD occurs when there is a sudden flow of electricity between two objects with different electrical potentials. PROM circuits are particularly vulnerable to ESD because they store data using electronic charges that can be easily disrupted or destroyed by the discharge. Therefore, proper ESD protection measures must be taken when handling PROM circuits to prevent damage.

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44. (211) Twisting an optic fiber during an installation or maintenance results in...

Explanation

Twisting an optic fiber during installation or maintenance can cause the fiber to become misaligned, resulting in reduced optical power transmission. This misalignment disrupts the smooth flow of light through the fiber, leading to signal loss and decreased efficiency in transmitting data or signals. Therefore, twisting the optic fiber can negatively impact its ability to transmit optical power effectively.

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45. (219) The HT-900B heating tool operates on...

Explanation

The HT-900B heating tool operates using compressed air or nitrogen. This means that it requires either compressed air or nitrogen as a source of power to function properly. It does not operate using humidified air or hydrogen.

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46. (224) The amount of clamping force developed in a bolt is called...

Explanation

The amount of clamping force developed in a bolt is called tension. Tension refers to the stretching or elongation of a material caused by the application of opposing forces. In the case of a bolt, when it is tightened, it experiences a tensile force that creates tension. This tension helps to hold the bolt in place and prevents it from loosening or coming apart under load. Therefore, tension is the correct term to describe the clamping force developed in a bolt.

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47. (228) What type of corrosion attacks the grain boundaries of a material?

Explanation

Intergranular corrosion is a type of corrosion that specifically attacks the grain boundaries of a material. It occurs when the grain boundaries of a metal are more susceptible to corrosion than the rest of the material. This type of corrosion can weaken the material and lead to structural failure. Pitting corrosion is a localized form of corrosion that creates small pits on the surface of the material. Exfoliation corrosion is a type of corrosion that occurs in layered materials, causing the layers to separate. Uniform etch corrosion is a general corrosion that occurs evenly across the surface of the material.

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48. (201) Which is not an Air Force inspection concept?

Explanation

The term "preflight" is not an Air Force inspection concept. Phased inspections refer to a series of inspections conducted at specific intervals. Periodic inspections are regular inspections conducted at predetermined intervals. Isochronal inspections are conducted at specific hour intervals or flight hours. However, "preflight" refers to the process of inspecting an aircraft before each flight to ensure its airworthiness and safety, rather than being a specific inspection concept.

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49. (206) What information is required in the corrective action block of the AFTO Form 781A?

Explanation

In the corrective action block of the AFTO Form 781A, the required information is the detailed description of the discrepancy, technician's signature, and supervisor's signature. However, technical order references are also necessary to provide guidance and instructions for the corrective action to be taken. These references help ensure that the correct procedures and standards are followed in resolving the discrepancy.

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50. (211) Optoelectronic transducers perform what function in a fiber optic transmission?

Explanation

Optoelectronic transducers in a fiber optic transmission convert optical energy to electrical energy. This means that they receive light signals transmitted through the fiber optic cable and convert them into electrical signals that can be further processed or transmitted. This conversion is essential for the proper functioning of the fiber optic system as it allows for the transmission of data over long distances without significant loss or degradation.

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51. (220) You need to tie all wire groups or bundles where supports are...

Explanation

The correct answer is "more than 12 inches apart." This means that when tying wire groups or bundles, the supports should be spaced at a distance greater than 12 inches from each other. This ensures that the wires are properly secured and organized, preventing them from becoming tangled or damaged.

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52. (230) What disadvantage do nearly all peripheral devices suffer from?

Explanation

Nearly all peripheral devices suffer from the disadvantage of slowness of response. This means that they may take longer to process and execute commands or transmit data, resulting in a delay in their overall performance. This can be particularly noticeable when using devices such as printers, scanners, or external storage devices, as they may take longer to complete tasks compared to the main computer system.

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53. (249) Which is not part of the aircraft propulsion system?

Explanation

The question asks for the component that is not part of the aircraft propulsion system. The given options include oil distribution, accessory drive, fuel distribution, and oxygen converter. Oil distribution, accessory drive, and fuel distribution are all essential components of the propulsion system as they play a role in lubrication, power transmission, and fuel supply respectively. However, an oxygen converter is not directly related to the propulsion system. It is typically used in the aircraft's environmental control system to convert oxygen into breathable air for passengers and crew.

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54. (225) Emergency devices are usually lock wired with a...

Explanation

Emergency devices are usually lock wired with a single strand of 0.020 copper shear wire. Lock wiring is a method used to secure components in place to prevent them from loosening or becoming detached due to vibration or other forces. In this case, emergency devices require a reliable and secure method of attachment, and a single strand of 0.020 copper shear wire is sufficient for this purpose. The use of a single strand ensures simplicity and ease of installation, while the 0.020 copper shear wire provides the necessary strength and durability to withstand any potential stresses or forces.

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55. (249) What aircraft fire protection system component monitors temperature changes for fire and overheat conditions?

Explanation

The correct answer is sensing element. In an aircraft fire protection system, the sensing element is responsible for monitoring temperature changes to detect fire and overheat conditions. It is designed to sense any abnormal rise in temperature and trigger the appropriate fire suppression measures to prevent a fire or overheating situation. The sensing element acts as a crucial component in ensuring the safety and protection of the aircraft and its occupants.

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56. (204) Which inspection is a thorough and searching "look, see, and fix" of the aircraft?

Explanation

A major inspection is a thorough and searching "look, see, and fix" of the aircraft. It involves a comprehensive examination of the aircraft's systems, components, and structure to ensure their proper functioning and identify any issues or defects that need to be addressed. This type of inspection is typically conducted at regular intervals or after a certain number of flight hours to maintain the aircraft's airworthiness and safety.

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57. (206) An AFTO Form 781L is used to...

Explanation

The correct answer is "record the removal and installation of controlled cryptographic items." The AFTO Form 781L is a form used by the United States Air Force to document the removal and installation of controlled cryptographic items. This form helps maintain a record of these actions for security and accountability purposes. It ensures that proper procedures are followed when handling sensitive cryptographic items and allows for tracking and monitoring of their movement.

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58. (209) What is not a flight line precaution used to protect electrostatic discharge sensitive components?

Explanation

Using protective tote boxes is not a flight line precaution used to protect electrostatic discharge sensitive components. The other options mentioned in the question are all valid precautions. Touching the line replaceable unit (LRU) case with your hands prior to removal from the aircraft helps to discharge any static electricity that may have built up. Touching the ends of aircraft wiring to the LRU case prior to installation ensures that any static charge is transferred to the case instead of the sensitive components. Covering LRU connector plugs also helps to prevent static electricity buildup. However, using protective tote boxes does not directly address the issue of electrostatic discharge and is not a specific precaution for protecting sensitive components.

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59. (214) What type of solderless connector permits easy and efficient connections to electrical equipment?

Explanation

A terminal lug is a type of solderless connector that allows for easy and efficient connections to electrical equipment. It is designed to securely connect wires to terminals or other conductive surfaces without the need for soldering. Terminal lugs typically have a hole or opening where the wire can be inserted and then tightened or crimped down to create a reliable electrical connection. This type of connector is commonly used in electrical installations, automotive wiring, and other applications where a strong and durable connection is required.

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60. (215) What is one purpose of crimper positioners?

Explanation

Crimper positioners are used to put the pin contact in the proper position. This ensures that the pin contact is correctly aligned and inserted into the connector. By using a crimper positioner, the technician can ensure that the pin contact is properly seated and secured, preventing any potential issues or malfunctions in the connector.

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61. (211) What is used to convert fiber optic light transmissions to electrical signals?

Explanation

A photo diode is used to convert fiber optic light transmissions to electrical signals. A photo diode is a semiconductor device that generates a current when exposed to light. In the context of fiber optic communications, the photo diode is used to detect the light signals that are transmitted through the fiber optic cable and convert them into electrical signals that can be processed and interpreted by electronic devices. The other options mentioned, such as detector, receiver, and light-emitting diode, are not specifically designed for this purpose and do not perform the same function as a photo diode in converting light to electrical signals.

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62. (231) The fractional and integral portions of a binary number are separated by the...

Explanation

The fractional and integral portions of a binary number are separated by the binary point. In binary representation, the binary point serves as the equivalent of the decimal point in decimal representation. It is used to distinguish between the whole number part and the fractional part of the binary number.

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63. (242) Graphs plotted to show the relationships of changing values on transistors are called...

Explanation

Graphs plotted to show the relationships of changing values on transistors are called characteristic curves. These curves depict the behavior of transistors under different conditions and provide valuable information about their performance. By analyzing characteristic curves, engineers can determine important parameters such as gain, cutoff frequency, and operating regions of transistors. This helps in designing and optimizing circuits for various applications.

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64. (247) The diffuser is part of the...

Explanation

The diffuser is part of the nacelles. The nacelles are the streamlined enclosures on an aircraft that house the engines. The diffuser is a component within the nacelles that helps to slow down and diffuse the airflow coming out of the engine. It plays a crucial role in improving the efficiency of the engine and reducing noise levels.

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65. (251) What is the minimum safe distance from the intake of an operating jet engine?

Explanation

The minimum safe distance from the intake of an operating jet engine is 25 feet to the front and 5 feet to the sides. This distance is necessary to ensure the safety of individuals near the engine, as the intake can create a powerful suction force that can pose a significant danger. Being too close to the intake can result in serious injury or even death. Therefore, it is crucial to maintain a safe distance to prevent any accidents or incidents.

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66. (218) What percentage of minor shield damage can the flight line technician repair?

Explanation

The flight line technician can repair up to 25 percent of the outer shield circumference when it comes to minor shield damage.

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67. (230) What component often serves as intermediate storage to facilitate data transfer between two devices?

Explanation

A buffer is a component that is commonly used as intermediate storage to facilitate data transfer between two devices. It temporarily holds data that is being transferred from one device to another, allowing for a smoother and more efficient transfer process. The buffer acts as a temporary storage space, ensuring that data can be transferred at a consistent rate, even if the sending and receiving devices operate at different speeds. This helps to prevent data loss or corruption during the transfer process and allows for better synchronization between the devices.

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68. (218) In repairing damaged copper foil tape, what is the last wrap used on the repaired area?

Explanation

Silicone self-bonding tape is used as the last wrap on the repaired area of damaged copper foil tape. This type of tape is specifically designed to adhere to itself, creating a strong and durable bond. It is commonly used in electrical and electronic applications to provide insulation, protection, and repair. The silicone material ensures that the tape is resistant to moisture, heat, and chemicals, making it suitable for long-term use in various environments.

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69. (226) The twists per inch value given to assure proper tension of the safety wire is...

Explanation

The twists per inch value given to assure proper tension of the safety wire is a minimum value. This means that it is the lowest number of twists per inch that should be applied to ensure the wire is properly tensioned. Using a higher number of twists per inch could result in excessive tension and potential damage to the wire or the components it is securing.

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70. (238) To directly convert binary-to-hexadecimal, divide the binary number into groups of...

Explanation

To directly convert binary-to-hexadecimal, the binary number needs to be divided into groups of 4 digits. Each group of 4 binary digits can be converted into a single hexadecimal digit. This is because each hexadecimal digit represents a value from 0 to 15, which can be represented by 4 binary digits (0000 to 1111). Dividing the binary number into groups of 4 digits allows for a straightforward conversion to hexadecimal.

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71. (240) Which logic gate function produces a logic high output if either or both inputs are logic highs?

Explanation

The OR gate produces a logic high output if either or both inputs are logic highs. This means that if at least one of the inputs is high, the output will be high. If both inputs are low, the output will be low. Therefore, the OR gate is the correct logic gate function for this scenario.

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72. (252) To prevent movement of the aircraft, the main landing gear wheels must be chocked...

Explanation

To prevent movement of the aircraft, the main landing gear wheels must be chocked in front of and behind the wheel with a 2" clearance. This means that the chocks should be placed both in front of and behind the wheel, ensuring that the aircraft is securely immobilized. The 2" clearance is necessary to provide enough space for the chocks to effectively prevent any movement of the aircraft. Placing the chocks with a 2" clearance ensures that there is enough distance between the chocks and the wheel to effectively stop any potential rolling or sliding of the aircraft.

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73. (203) Which inspection is designed to reduce the time an aircraft is out of commission for any given inspection?

Explanation

The correct answer is Phase. The Phase inspection is designed to reduce the downtime of an aircraft during inspection. It involves a detailed examination of specific components or systems of an aircraft, which can be completed in a shorter time compared to a Major inspection. This allows the aircraft to be back in service sooner, minimizing the time it is out of commission for inspection purposes.

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74. (206) When an AFTO Form 781L is completed, one copy is forwarded to...

Explanation

When an AFTO Form 781L is completed, one copy is forwarded to the base supply. This is because the AFTO Form 781L is used for documenting and tracking maintenance actions and repairs on aircraft and equipment. The base supply is responsible for managing and providing the necessary supplies and materials for maintenance and repair activities. By forwarding a copy of the form to base supply, they can keep track of the maintenance actions and ensure that the necessary supplies are available to support the maintenance efforts.

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75. (206) The AFTO Form 781-series are not used to document aircraft...

Explanation

The AFTO Form 781-series is a set of forms used in the United States Air Force to document various aspects of aircraft maintenance and operations. These forms are not used to document component repair, as there are other forms specifically designed for that purpose. The AFTO Form 781-series is primarily used for documenting inspections, flight records, and configurations of the aircraft.

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76. (220) When tying wire bundles behind connectors, start ties far enough back from the connector to...

Explanation

When tying wire bundles behind connectors, starting the ties far enough back from the connector helps to avoid spreading of the contacts. If the ties are too close to the connector, they can put pressure on the contacts, causing them to spread apart. This can result in poor electrical connections and potential failure of the system. By starting the ties further back, the contacts are protected and can maintain their proper alignment, ensuring a reliable connection.

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77. (231) Which number system was adopted to simplify and standardize terminology?

Explanation

The metric system was adopted to simplify and standardize terminology. The metric system is a decimal-based system of measurement that uses prefixes to indicate multiples or fractions of a unit. It is widely used in most countries around the world and provides a consistent and logical framework for measurements in various fields such as science, engineering, and commerce. The other options, hexadecimal, decimal, and binary, are number systems that are not directly related to simplifying and standardizing terminology.

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78. (205) Which inspection includes a review of the forms for current status, a visual inspection of equipment for defects, and adequate servicing?

Explanation

The correct answer is Operator. This inspection involves reviewing the forms for current status, visually inspecting equipment for defects, and ensuring that adequate servicing is carried out. It is the responsibility of the operator to perform this type of inspection regularly to ensure that the equipment is in good working condition and to identify any potential issues or defects that may require attention.

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79. (212) Which is not a type of connector coupling?

Explanation

The question is asking to identify the option that is not a type of connector coupling. The options provided are Friction, Bayonet, Insertion, and Threaded. Friction, Bayonet, and Threaded are all types of connector couplings commonly used in various industries. However, Insertion is not a recognized type of connector coupling. Therefore, the correct answer is Insertion.

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80. (255) When a higher angle-of-attack is required to maintain lift at lower airspeeds, the pilot uses the...

Explanation

When a higher angle-of-attack is required to maintain lift at lower airspeeds, the pilot uses slats. Slats are movable surfaces located on the leading edge of the wings that can be extended to increase the curvature of the wing, allowing for a higher angle-of-attack. By increasing the angle-of-attack, the lift generated by the wings is increased, enabling the aircraft to maintain lift at lower airspeeds. The elevators, ailerons, and rudders are control surfaces that are used for different purposes such as controlling pitch, roll, and yaw respectively, but they do not directly affect the angle-of-attack.

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81. (244) The main purpose of transistor bias control circuits is to...

Explanation

Transistor bias control circuits are used to stabilize the tendency of the transistor to avalanche when hot. Avalanche is a phenomenon that occurs when the transistor operates outside of its normal operating range, causing it to overheat and potentially damage the device. By controlling the bias current, the circuit ensures that the transistor operates within its safe operating range and prevents it from entering the avalanche region. This helps to maintain the stability and reliability of the transistor in high-temperature conditions.

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82. (256) The most correct statement concerning the B-2 gust load alleviation surface alleviaiton is it...

Explanation

The B-2 gust load alleviation surface alleviation is designed to reduce the wing loads caused by turbulence and other factors. This means that it helps to minimize the impact of external forces on the wings, ensuring that they are not subjected to excessive stress or strain. By reducing the wing loads, the gust load alleviation surface helps to improve the overall stability and performance of the aircraft during flight.

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83. (246) The small arrow on the rotor sychro schematic symbol indicates the angular...

Explanation

The small arrow on the rotor synchro schematic symbol indicates the angular displacement of the rotor. This means that the arrow represents the rotation or movement of the rotor in relation to its starting position. It provides a visual indication of the position or angle at which the rotor is currently located.

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84. (235) The result of converting the binary-coded decimal number 11110000101.0100011 to its decimal equivalent is...

Explanation

The given binary-coded decimal number has a decimal point after the 5th digit from the right. To convert it to its decimal equivalent, we need to multiply each digit by its corresponding power of 2 and sum them up. Starting from the left, the digits are 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1. Multiplying each digit by its corresponding power of 2 and summing them up gives us 8 + 4 + 2 + 1 + 0 + 0 + 0 + 0 + 1/2 + 0 + 1/32 + 0 + 0 + 0 + 1/8 + 1/4 = 15.8125. Rounding this to two decimal places gives us 15.81. Therefore, the correct answer is 785.46.

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85. (243) The transistor amplifier with the characteristics of high-input impedance, low-output impedance, input and output in-phase, average gain of less than one, and moderate to high-power gain is the common...

Explanation

A transistor amplifier with high-input impedance means that it can accept a high voltage signal without drawing much current from the source. A low-output impedance indicates that it can drive a load with minimal loss of signal. Input and output in-phase means that the input and output signals have the same phase relationship. An average gain of less than one suggests that the output signal is smaller than the input signal. Moderate to high-power gain means that the amplifier can increase the power of the signal. All these characteristics are typically associated with a common collector (also known as an emitter follower) configuration. In this configuration, the collector terminal is the output, which matches the given characteristics.

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86. (244) What components are used for temperature stabilization in transistor circuits?

Explanation

Diodes and thermistors are used for temperature stabilization in transistor circuits. Diodes are used to compensate for temperature variations by providing a constant voltage drop, while thermistors are used as temperature sensors to detect changes in temperature and adjust the circuit accordingly. Together, they help maintain a stable temperature in the transistor circuit, ensuring its proper functioning.

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87. (206) Which block on the AFTO Form 781K is used to document the number and type of the next inspection due?

Explanation

The Aerospace Inspection Data block on the AFTO Form 781K is used to document the number and type of the next inspection due. This block provides information about the inspections that need to be conducted on the aircraft, including the specific type of inspection and the number of inspections that are due. By documenting this information in the Aerospace Inspection Data block, maintenance personnel can easily refer to it and ensure that all necessary inspections are completed in a timely manner.

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88. (245) Which type of coupling uses an inductor and a capacitor for coupling?

Explanation

Impedance coupling uses an inductor and a capacitor for coupling. Impedance coupling is a method of connecting two circuits together by using an inductor and a capacitor to allow the transfer of signals. The inductor and capacitor combination creates an impedance that determines the flow of signals between the circuits. This type of coupling is commonly used in audio amplifiers and other electronic systems to transfer signals efficiently while minimizing interference and distortion.

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89. (204) Which inspection is performed at the completion of the mission during which the specified calendar days are accrued?

Explanation

The correct answer is "Minor". A minor inspection is performed at the completion of the mission during which the specified calendar days are accrued. This inspection is typically a routine check that ensures the aircraft is in proper working condition and ready for the next mission. It may involve tasks such as inspecting the exterior and interior of the aircraft, checking fluid levels, and conducting basic functional tests. The minor inspection helps to maintain the overall airworthiness of the aircraft and prevent any potential issues from escalating.

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90. (238) The hexadecimal equivalent of binary 101101000110 is...

Explanation

The given binary number 101101000110 can be converted to hexadecimal by grouping the binary digits into groups of four starting from the rightmost digit. The groups are 1011, 0100, and 0110. Each group of four binary digits represents a hexadecimal digit. The hexadecimal equivalents of the groups are B, 4, and 6. Therefore, the hexadecimal equivalent of the given binary number is X'B46'.

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91. (239) The result of adding ADA% to 10AF is...

Explanation

Adding ADA% to 10AF means adding a percentage of ADA to the hexadecimal number 10AF. The hexadecimal number ADA is equal to 2781 in decimal. Adding this to 10AF (which is equal to 4271 in decimal) gives us the result BE54 in hexadecimal.

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92. (239) The result of subtracting 0FFF from 1F88 is...

Explanation

To subtract 0FFF from 1F88, we can perform the subtraction operation digit by digit, starting from the rightmost digit. Subtracting F from 8 gives 9, and there is no carry. Subtracting F from 8 gives 9 again. Subtracting F from 0 gives 1, and we need to borrow from the next digit. Subtracting 0 from 1 gives 1. Therefore, the result is F89.

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(229) Corrosion prevention is the responsibility of...
(207) What portion of an AF Form 1492, Warning Tag, is used to provide...
(221) If a tool is not found on an aircraft after a thorough search,...
(226) One of the most common lock wiring mistakes a new avionics...
(227) The single most important contributor to corrosion in avionics...
(248) What component on a helicopter produces a sideways thrust to...
(217) What is of the utmost importance in the soldering process?
(230) All components of the computer connect in some way to the...
(204) When the home station check becomes due during a mission, the...
(207) To "flag" a condition on an aircraft that could cause damage or...
(249) What system provides aircraft cabin pressurization?
(253) Which is not one of the forces at work on an aircraft in flight?
(206) Who ensures the job control number (when assigned) is entered on...
(206) If you find a malfunction during an operational check, how do...
(222) The most widely used hammer by aircraft mechanics is the...
(232) In the number 305.8410, the numeral 4 represents the...
(257) The C-5 primary flight control system consists of the aileron,...
(216) For electrical soldering, always use...
(228) What type of corrosion occurs when dissimilar metals are in...
(201) The normal inspection work card deck must be completed upon...
(202) When is the thruflight inspection performed?
(210) Which type of cable is used to carry radio-frequency power from...
(216) Flux is designed to...
(224) What fasteners are normally used for securing components to a...
(225) Whick lock wire method is most appropriate for hard-to-reach or...
(233) The number 1012 represents the...
(205) Acceptance inspections are performed when...
(206) When an authorized individual has made sufficient investigation...
(218) What precaution must you adhere to prior to applying heat...
(223) What tool measures the specific degree of tightness of nuts or...
(254) The point at which all three axes of an aircraft meet is the...
(210) Electromagnetic pulse cable was developed with how many outer...
(213) Time domain reflectometers can test cables as long as...
(219) Heat and air pressure required for proper installation of...
(222) When a screwdriver blade becomes nicked or the edges become...
(236) The major difference between the octal, decimal, and binary...
(246) Synchro stator windings are placed...
(250) Which is not a one of the general types of radio installed on...
(251) When approaching overheated aircraft wheels, always approach the...
(209) What type of ground should be provided for soldering irons in an...
(216) Utilizing exact dimensions for stripping wire ensures...
(202) What type of inspection is a flight preparedness check?
(208) An example of an electrostatic discharge sensitivity device...
(211) Twisting an optic fiber during an installation or maintenance...
(219) The HT-900B heating tool operates on...
(224) The amount of clamping force developed in a bolt is called...
(228) What type of corrosion attacks the grain boundaries of a...
(201) Which is not an Air Force inspection concept?
(206) What information is required in the corrective action block of...
(211) Optoelectronic transducers perform what function in a fiber...
(220) You need to tie all wire groups or bundles where supports are...
(230) What disadvantage do nearly all peripheral devices suffer from?
(249) Which is not part of the aircraft propulsion system?
(225) Emergency devices are usually lock wired with a...
(249) What aircraft fire protection system component monitors...
(204) Which inspection is a thorough and searching "look, see, and...
(206) An AFTO Form 781L is used to...
(209) What is not a flight line precaution used to protect...
(214) What type of solderless connector permits easy and efficient...
(215) What is one purpose of crimper positioners?
(211) What is used to convert fiber optic light transmissions to...
(231) The fractional and integral portions of a binary number are...
(242) Graphs plotted to show the relationships of changing values on...
(247) The diffuser is part of the...
(251) What is the minimum safe distance from the intake of an...
(218) What percentage of minor shield damage can the flight line...
(230) What component often serves as intermediate storage to...
(218) In repairing damaged copper foil tape, what is the last wrap...
(226) The twists per inch value given to assure proper tension of the...
(238) To directly convert binary-to-hexadecimal, divide the binary...
(240) Which logic gate function produces a logic high output if either...
(252) To prevent movement of the aircraft, the main landing gear...
(203) Which inspection is designed to reduce the time an aircraft is...
(206) When an AFTO Form 781L is completed, one copy is forwarded to...
(206) The AFTO Form 781-series are not used to document aircraft...
(220) When tying wire bundles behind connectors, start ties far enough...
(231) Which number system was adopted to simplify and standardize...
(205) Which inspection includes a review of the forms for current...
(212) Which is not a type of connector coupling?
(255) When a higher angle-of-attack is required to maintain lift at...
(244) The main purpose of transistor bias control circuits is to...
(256) The most correct statement concerning the B-2 gust load...
(246) The small arrow on the rotor sychro schematic symbol indicates...
(235) The result of converting the binary-coded decimal number...
(243) The transistor amplifier with the characteristics of high-input...
(244) What components are used for temperature stabilization in...
(206) Which block on the AFTO Form 781K is used to document the number...
(245) Which type of coupling uses an inductor and a capacitor for...
(204) Which inspection is performed at the completion of the mission...
(238) The hexadecimal equivalent of binary 101101000110 is...
(239) The result of adding ADA% to 10AF is...
(239) The result of subtracting 0FFF from 1F88 is...
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