2A654 Volume 3 CDC

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  • 1/110 Questions

    What condition will likely result from the contact of tubing with a surrounding surface?   

    • Galling
    • Chafing
    • Scratching
    • Delamination
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Aircraft Maintenance Quizzes & Trivia
About This Quiz

This quiz assesses knowledge on aircraft maintenance, focusing on fuselage construction, flight control surfaces, and bolt installation. It's designed for Air Force personnel, enhancing understanding of aircraft structural integrity and operational efficiency.

Quiz Preview

  • 2. 

    How can you prevent damage to a screw head?   

    • Replace screws frequently

    • Use correct size screwdriver

    • Use a chisel on overtorqued screws

    • Use oversized screwdriver for a snug fit

    Correct Answer
    A. Use correct size screwdriver
    Explanation
    Using the correct size screwdriver is important to prevent damage to a screw head. If a screwdriver is too small or too large for the screw head, it can slip or strip the head, making it difficult to remove or tighten the screw properly. By using the correct size screwdriver, the force can be applied evenly and securely, reducing the risk of damage to the screw head.

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  • 3. 

    What should you use to clean tools that are extremely greasy and grimy? 

    • JP-4 or gasoline

    • MEK

    • Approved cleaning solvent

    • Aluminum oxide abrasive cloth

    Correct Answer
    A. Approved cleaning solvent
    Explanation
    To clean tools that are extremely greasy and grimy, it is recommended to use an approved cleaning solvent. This is because an approved cleaning solvent is specifically designed to effectively remove grease and grime without causing damage to the tools. JP-4 or gasoline may be flammable and pose safety risks, while MEK (methyl ethyl ketone) is a strong solvent that may be too harsh for certain tools. Aluminum oxide abrasive cloth is used for abrasive cleaning and may not be suitable for removing grease and grime.

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  • 4. 

    Under what condition would an air hose be more likely to crack when bent too sharply?

    • During cold weather

    • During hot weather

    • Immediately after use

    • When the hose has collected dirt

    Correct Answer
    A. During cold weather
    Explanation
    During cold weather, the air hose is more likely to crack when bent too sharply because the cold temperatures cause the rubber to become more rigid and less flexible. This lack of flexibility makes the hose more susceptible to cracking and breaking when bent at extreme angles.

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  • 5. 

    Why is the use of cotter pins on aircraft systems favorable? 

    • They can be reused after removal

    • They are stronger than safety wire

    • They are less expensive than other pins

    • They can be removed and installed quickly

    Correct Answer
    A. They can be removed and installed quickly
    Explanation
    Cotter pins are favorable in aircraft systems because they can be easily removed and installed quickly. This is important in aircraft maintenance and repairs as it allows for efficient and timely replacement or adjustment of components. Additionally, quick installation and removal of cotter pins can minimize aircraft downtime and reduce maintenance costs.

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  • 6. 

    Immediately after positioning an aircraft inside a fuel systems repair facility

    • The aircraft must be grounded

    • The aircraft must be defueled

    • Emergency communications must be established

    • Fire extinguishers must be inspected and ready for use

    Correct Answer
    A. The aircraft must be grounded
    Explanation
    After positioning an aircraft inside a fuel systems repair facility, the aircraft must be grounded. Grounding an aircraft means that it is connected to the earth or a conductive surface to prevent the buildup of static electricity. This is important in a fuel systems repair facility to eliminate the risk of sparks or static discharge that could ignite fuel vapors or cause a fire. Grounding ensures the safety of the aircraft and personnel working on it.

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  • 7. 

    Open fuel system repair areas must be equipped with a minimum of

    • One 150- pound Halon fire extinguisher or equivalent

    • Two 150- pound Halon fire extinguisher or equivalent

    • Thre dry chemical fire extinguishers with hose reels

    • Two CO2 fire extinguishers or equivalent

    Correct Answer
    A. Two 150- pound Halon fire extinguisher or equivalent
    Explanation
    Open fuel system repair areas must be equipped with two 150-pound Halon fire extinguishers or equivalent. This is necessary to ensure the safety of the repair area in case of a fire. Halon fire extinguishers are specifically designed to extinguish fires involving flammable liquids, such as fuel. Having two extinguishers ensures that there is a backup in case one fails or is not sufficient to control the fire. The 150-pound capacity is necessary to provide enough extinguishing agent to effectively suppress a fire in a fuel system repair area.

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  • 8. 

    What factor(s) determine the appropiate condition/ action of an integral tank fuel leak?

    • Location

    • Classification

    • Classification and Location

    • Location and repair required

    Correct Answer
    A. Classification and Location
    Explanation
    The appropriate condition/action of an integral tank fuel leak is determined by both the classification and location of the leak. The classification refers to the severity or extent of the leak, while the location refers to where the leak is occurring within the integral tank. Both factors are important in determining the appropriate response or action to take in order to address and repair the fuel leak effectively.

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  • 9. 

    An authorized sealant scraper may be made from

    • Plastic

    • Copper

    • Titanium

    • Brass

    Correct Answer
    A. Plastic
    Explanation
    An authorized sealant scraper may be made from plastic because plastic is a versatile material that is lightweight, durable, and non-corrosive. It can effectively remove sealant without causing damage to the surface being scraped. Plastic scrapers are also less likely to leave scratches or marks compared to other materials like copper, titanium, or brass. Additionally, plastic scrapers are often more affordable and readily available, making them a practical choice for sealant removal tasks.

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  • 10. 

    What part of a Wiggins coupling provides the sealing action?   

    • O-ring

    • Gasket

    • Snap ring

    • Split washer

    Correct Answer
    A. O-ring
    Explanation
    An O-ring provides the sealing action in a Wiggins coupling. O-rings are commonly used in mechanical applications to create a seal between two parts, preventing leakage of fluids or gases. In the case of a Wiggins coupling, the O-ring is placed between the two coupling halves to create a tight seal, ensuring that no fluid or gas can escape.

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  • 11. 

    If you were planning to cut small quantities of replacement foam for a fuel tank, you would use

    • An Ontario knife

    • A razor blade

    • A hacksaw

    • A sticher

    Correct Answer
    A. An Ontario knife
    Explanation
    An Ontario knife would be the most suitable tool for cutting small quantities of replacement foam for a fuel tank. Ontario knives are known for their sharpness and precision, making them ideal for making precise and clean cuts. Using a razor blade might be too delicate and may not provide enough control, while a hacksaw would be too large and cumbersome for cutting small quantities. A sticher is not a suitable tool for cutting foam. Therefore, an Ontario knife is the best choice for this task.

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  • 12. 

    What minimum diameter safety wire should be installed on bolts having a .050-inch drilled hole?   

    • .032

    • .020

    • .045

    • .028

    Correct Answer
    A. .032
    Explanation
    The minimum diameter safety wire that should be installed on bolts with a .050-inch drilled hole is .032. This means that the wire should have a diameter of .032 inches in order to properly secure the bolts.

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  • 13. 

    Who orders evacuation of a fuel tank in the event of an emergency situation?

    • Entrant

    • Attendant

    • Entry authority

    • Equipment monitor/ runner

    Correct Answer
    A. Attendant
    Explanation
    The correct answer is Attendant. In the event of an emergency situation, the attendant is responsible for ordering the evacuation of a fuel tank. As the person in charge of overseeing the fuel tank operation, the attendant has the knowledge and authority to make decisions regarding safety protocols and evacuation procedures. They are trained to assess the situation, identify potential risks, and take appropriate actions to ensure the safety of everyone involved.

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  • 14. 

    Which of the following changed conditions would requiere amendment of an entry permit by the entry authority?

    • The task takes a few days longer than expected

    • Authorized chemicals are brought into the tank

    • The aircraft is moved from one repair location to another

    • Previously permitted personnel require re-entry into the tank

    Correct Answer
    A. The aircraft is moved from one repair location to another
    Explanation
    When the aircraft is moved from one repair location to another, it would require an amendment of the entry permit by the entry authority. This is because the change in repair location could affect the safety and security protocols, as well as the permissions and clearances needed for the entry and repair process. Therefore, the entry authority needs to update the entry permit to ensure that all necessary requirements and conditions are met for the new repair location.

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  • 15. 

    An aircraft in a fuel systems hangar is being blow-purged.  The aircraft does not contain foam.  As a minimum, how often must a lower explosive limit (LEL) reading be taken?

    • Every four hours

    • Every eight hours

    • At the beginning of each shift

    • At the beginning of the workday

    Correct Answer
    A. Every four hours
    Explanation
    In a fuel systems hangar, blow-purging is a process used to remove flammable vapors or gases from the aircraft. Since the aircraft does not contain foam, there is a potential risk of explosive conditions due to the presence of fuel vapors. Therefore, it is necessary to monitor the lower explosive limit (LEL) regularly to ensure the safety of the hangar and personnel. Taking LEL readings every four hours allows for timely detection of any potential buildup of flammable vapors, enabling prompt action to prevent an explosion or fire hazard.

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  • 16. 

    Which type of wrench should you use to tighten an internal wrenching nut?   

    • Socket

    • Adjustable jaw

    • Allen

    • Recessed

    Correct Answer
    A. Allen
    Explanation
    An internal wrenching nut typically has a hexagonal shape, which means it requires a wrench with a corresponding hexagonal shape to tighten it properly. An Allen wrench, also known as a hex key or hex wrench, is designed specifically for this purpose. It has a hexagonal-shaped end that fits into the nut's hexagonal recess, allowing for effective tightening. Therefore, an Allen wrench is the appropriate tool to use in this situation.

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  • 17. 

    The temperature range of the HDU-13/M heater is

    • 0 to 170 F

    • 20 to 180 F

    • 30 to 190 F

    • 40 to 200 F

    Correct Answer
    A. 40 to 200 F
    Explanation
    The correct answer is 40 to 200 F. This means that the temperature range of the HDU-13/M heater is from a minimum of 40 degrees Fahrenheit to a maximum of 200 degrees Fahrenheit.

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  • 18. 

    Which is a feature of a T-handle type torque qrench? 

    • Is difficult to use

    • Can be adjusted in small increments

    • Has a preset torque

    • Can possibly over-tighten a fastener

    Correct Answer
    A. Has a preset torque
    Explanation
    A T-handle type torque wrench has a preset torque, meaning that it is designed to tighten a fastener to a specific torque value. This feature ensures that the fastener is tightened to the correct level, preventing under or over-tightening. The preset torque allows for precise and consistent tightening, making it a reliable tool for various applications.

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  • 19. 

    Which tool is used to repair a fuel cell fitting?

    • Air chisel

    • Bench grinder

    • Torque wrench

    • Pneumatic buffer

    Correct Answer
    A. Pneumatic buffer
    Explanation
    A pneumatic buffer is a tool used to repair a fuel cell fitting. It is a type of power tool that uses compressed air to rotate a buffing wheel or pad. This tool is commonly used in automotive and industrial applications to smooth and polish surfaces. In the context of repairing a fuel cell fitting, a pneumatic buffer can be used to remove any imperfections or corrosion on the fitting, ensuring a proper seal and preventing leaks.

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  • 20. 

    Which maintenance stand is not adjustable?

    • C-1

    • B-1

    • B-5

    • B-2

    Correct Answer
    A. C-1
    Explanation
    The correct answer is C-1. This maintenance stand is not adjustable because it is specifically designed to be fixed at a certain height or position. Unlike the other options, C-1 does not have any adjustable features or mechanisms that allow for height or position adjustments.

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  • 21. 

    Structural support members of an integral tank should never be removed until

    • It is time to perform maintenance

    • The load stress has been removed

    • Replacement fasteners have been found

    • Permission has been given by the system manager

    Correct Answer
    A. The load stress has been removed
    Explanation
    The structural support members of an integral tank should never be removed until the load stress has been removed. This is because the load stress puts pressure on the support members, and removing them before the stress is relieved can lead to structural failure or collapse. It is important to ensure that the tank is stable and the load stress is no longer present before removing any support members for maintenance or other purposes.

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  • 22. 

    A noncuring sealant design is made up of

    • Voids and gaps

    • Grooves and channels

    • Stringers and braces

    • Fasteners and baffles

    Correct Answer
    A. Grooves and channels
    Explanation
    A noncuring sealant design is made up of grooves and channels. Grooves and channels are used to create a pathway for the sealant to flow and fill in voids and gaps. By having grooves and channels, the sealant can be applied more evenly and effectively, ensuring that all areas are properly sealed. This design allows for better adhesion and prevents any leaks or gaps from forming, providing a reliable and durable seal.

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  • 23. 

    The size of a bolt is generally stated in terms of its

    • weight, diameter, and head size

    • Head size, grip length, and weight

    • Length, weight, and threads per inch

    • Diameter, length, and threads per inch

    Correct Answer
    A. Diameter, length, and threads per inch
    Explanation
    The size of a bolt is generally stated in terms of its diameter, length, and threads per inch. These three factors are important in determining the compatibility and functionality of the bolt. The diameter refers to the thickness of the bolt, the length determines how far the bolt extends, and the threads per inch indicate the number of threads present on the bolt. Together, these measurements provide a comprehensive understanding of the bolt's size and specifications.

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  • 24. 

    What type of manifold coupling consists  of a body, nut, split washers, o-rings, and a retainer? 

    • V-band

    • Pneumatic

    • Wiggins

    • Quick-disconnect

    Correct Answer
    A. Wiggins
    Explanation
    A Wiggins manifold coupling consists of a body, nut, split washers, o-rings, and a retainer. This type of coupling is commonly used in various industries, including automotive and aerospace, to provide a secure and leak-free connection between two components. The split washers and o-rings help to create a tight seal, while the retainer ensures that the coupling remains securely fastened. Wiggins couplings are known for their reliability and ease of use, making them a popular choice in many applications.

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  • 25. 

    For what purpose is the AFTO form 427 used

    • Historical records of leak repairs

    • Temporary record of temporary repairs

    • Temporary record of permanent repairs

    • Historical record of component changes

    Correct Answer
    A. Historical records of leak repairs
    Explanation
    The AFTO form 427 is used for the purpose of maintaining historical records of leak repairs. This form is specifically designed to document any repairs made to address leaks in various components or systems. By keeping track of these repairs, it allows for easy reference and analysis of past issues, helping to identify patterns, trends, and potential areas for improvement in the future.

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  • 26. 

    When should the hollow bolt method be used to isolate a leak source in an integral tank?

    • When the double cup assembly was unsuccessful

    • When the leak is at a common tank boundary

    • Any time the leak is larger then class A

    • In conjuction with the pressure box

    Correct Answer
    A. When the double cup assembly was unsuccessful
    Explanation
    The hollow bolt method should be used to isolate a leak source in an integral tank when the double cup assembly was unsuccessful. This means that if the double cup assembly, which is a common method for sealing leaks, did not work, then the hollow bolt method can be used as an alternative. It is a technique that involves using a hollow bolt to seal the leak and prevent any further leakage.

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  • 27. 

    A brush coat of sealant should be applied with?

    • Spatula

    • Acid brush

    • Paint brush

    • Fairing tool

    Correct Answer
    A. Acid brush
    Explanation
    An acid brush should be used to apply a brush coat of sealant. Acid brushes are typically made of natural bristles and have a wooden handle. They are commonly used for applying acids, solvents, and other liquids. The bristles of an acid brush are firm and can hold a good amount of sealant, allowing for precise and controlled application. The brush coat of sealant helps to create a protective barrier and ensure proper adhesion of the sealant to the surface.

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  • 28. 

    For which of the following aircraft applications should a self-locking nut not be installed?

    • Attachment of a pulley

    • Attachment of an antifriction bearing

    • Mounting an accessory near the engine

    • Connecting sections of a movable joint

    Correct Answer
    A. Connecting sections of a movable joint
    Explanation
    A self-locking nut should not be installed for connecting sections of a movable joint because these joints require the ability to move and adjust. A self-locking nut would prevent this movement and could cause damage or failure of the joint.

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  • 29. 

    The ratio of output pressure to input pressure of a two-part sealant high-pressure injection gun is

    • 10 to 1

    • 25 to 1

    • 50 to 1

    • 125 to 1

    Correct Answer
    A. 50 to 1
    Explanation
    The ratio of output pressure to input pressure of a two-part sealant high-pressure injection gun is 50 to 1. This means that for every unit of input pressure, the gun produces 50 units of output pressure. This high ratio indicates that the gun is capable of generating a significant amount of pressure, making it suitable for applications that require a strong sealant bond.

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  • 30. 

    Maintenance stands useed specially for fuel system maintenance should be equipped with

    • Static discharge plates

    • Static discharge plates and handrail steps

    • Wheel locks and bonding wire reels

    • Handrail steps and wheel locks

    Correct Answer
    A. Static discharge plates
    Explanation
    Maintenance stands used specifically for fuel system maintenance should be equipped with static discharge plates. These plates help to safely dissipate any static electricity that may be present, reducing the risk of sparks or ignition in a potentially flammable environment. By providing a path for static electricity to discharge, these plates help to ensure the safety of both the maintenance personnel and the equipment being worked on.

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  • 31. 

    An air compressor operating outside the fuel system repair area

    • Must be bonded

    • Must be grounded

    • Must be grounded and bonded

    • Does not require grounding and bonding

    Correct Answer
    A. Does not require grounding and bonding
    Explanation
    The correct answer is "does not require grounding and bonding." This is because an air compressor operating outside the fuel system repair area does not pose a significant risk of igniting flammable vapors, so it does not need to be grounded or bonded. Grounding and bonding are typically required for electrical equipment in areas where there is a higher risk of sparks or static electricity causing a fire or explosion. However, since the air compressor is operating outside the fuel system repair area, it is considered safe and does not require grounding or bonding.

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  • 32. 

    Which assembly includes the aft end of the fuselage of conventionally designed aircraft?

    • Fairing

    • Ailerons

    • Empennage

    • Trailing edge

    Correct Answer
    A. Empennage
    Explanation
    The empennage is the assembly that includes the aft end of the fuselage of conventionally designed aircraft. It typically consists of the horizontal stabilizer, vertical stabilizer, and control surfaces such as the rudder and elevator. The empennage plays a crucial role in providing stability and control to the aircraft during flight. The other options, fairing, ailerons, and trailing edge, do not specifically refer to the aft end of the fuselage.

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  • 33. 

    Which type of rivet is used on the top skin surface of an aircraft?   

    • Flathead

    • Countersunk

    • Roundhead

    • Brazier head

    Correct Answer
    A. Countersunk
    Explanation
    Countersunk rivets are used on the top skin surface of an aircraft. These rivets have a conical shape with a flat head that sits flush with the surface, creating a smooth and aerodynamic surface. The countersunk shape allows the rivet to be recessed into the material, reducing drag and preventing interference with airflow over the aircraft's surface. This type of rivet is commonly used in aviation to ensure optimal aerodynamic performance and structural integrity.

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  • 34. 

    Which example is not acceptable regarding the installation of a flexible hose assembly? 

    • Install the hose so that it will not be subjected to twisting

    • Use oil to aid the installation of a self-sealing hose

    • Ensure clamps are not so tight that they restrict flow

    • Support the hose at least every 24 inches of length

    Correct Answer
    A. Use oil to aid the installation of a self-sealing hose
    Explanation
    Using oil to aid the installation of a self-sealing hose is not an acceptable example. The use of oil can potentially compromise the integrity of the hose and cause it to leak or fail. It is important to follow the manufacturer's guidelines and recommendations for the installation of flexible hose assemblies to ensure proper functioning and safety.

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  • 35. 

    The display on the T477W bonding meter is turned on by pressing the

    • TEST button

    • START buttong

    • ILLUMINATE button

    • LIGHT button

    Correct Answer
    A. TEST button
    Explanation
    The display on the T477W bonding meter is turned on by pressing the TEST button.

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  • 36. 

    What type of tubing is used in high-pressure systems such as the landing gear system? 

    • Copper

    • Stainless steel

    • Titanium alloy

    • Aluminum alloy

    Correct Answer
    A. Stainless steel
    Explanation
    Stainless steel is used in high-pressure systems such as the landing gear system because it has excellent corrosion resistance and can withstand high pressure and temperature conditions. It is also strong and durable, making it suitable for the demanding requirements of high-pressure systems. Copper, titanium alloy, and aluminum alloy may not have the same level of corrosion resistance and strength as stainless steel, making them less suitable for high-pressure systems.

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  • 37. 

    The injection of noncuring sealant on aircraft is generally limited to areas

    • Where corrosion is likely to develop

    • Which are exposed to the elements

    • Where structural loading occurs

    • Where access is difficult

    Correct Answer
    A. Where access is difficult
    Explanation
    The injection of noncuring sealant on aircraft is generally limited to areas where access is difficult. This is because noncuring sealant is typically used to prevent or repair leaks in areas that are hard to reach or inaccessible. It is applied in areas where traditional sealing methods may not be effective or practical due to limited access. By injecting the sealant into these difficult-to-reach areas, it ensures that the aircraft remains properly sealed and protected from potential leaks or corrosion.

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  • 38. 

    Which of the following are examples of secondary flight controls?

    • Ailerons

    • Rudders

    • Trim tabs

    • Elevators

    Correct Answer
    A. Trim tabs
    Explanation
    Secondary flight controls are devices that are used to assist in controlling the aircraft's movement and stability. Ailerons, rudders, and elevators are primary flight controls, as they directly control the aircraft's roll, yaw, and pitch respectively. Trim tabs, on the other hand, are secondary flight controls. They are small surfaces attached to the primary flight controls and are used to fine-tune the aircraft's trim or balance during flight. By adjusting the trim tabs, pilots can reduce control forces and maintain the desired attitude of the aircraft, improving overall control and stability.

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  • 39. 

    What powered tool is often used to remove access door screws?   

    • Impact wrench

    • Speed handle

    • Air hammer

    • Electric drill with adapter

    Correct Answer
    A. Impact wrench
    Explanation
    An impact wrench is often used to remove access door screws because it provides a high torque output that allows for quick and efficient removal of screws. It is designed to deliver strong rotational force, making it ideal for tasks that require a lot of power. This tool is commonly used in automotive and construction industries where there is a need to remove screws quickly and easily.

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  • 40. 

    The one-part sealant gun is  used to inject sealant into

    • Prepacks

    • Loose rivet holes

    • Voids inside the tank

    • Channels under the wing skin

    Correct Answer
    A. Channels under the wing skin
    Explanation
    The one-part sealant gun is used to inject sealant into channels under the wing skin. This is likely because channels under the wing skin can be difficult to access and seal manually, so a sealant gun is used to inject the sealant directly into these channels. This ensures a proper and thorough seal, preventing any leaks or damage to the wing structure.

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  • 41. 

    Which support equipment item is equipped with a 110-volt AC power receptacle to permit the use of electrical equipment outside the repair area

    • NF-2 light-all

    • MB-2 nitrogen cart

    • DIesel Generator

    • HDU-13/M heater

    Correct Answer
    A. NF-2 light-all
    Explanation
    The NF-2 light-all is equipped with a 110-volt AC power receptacle to allow the use of electrical equipment outside the repair area. This suggests that the NF-2 light-all is designed to provide portable lighting and power sources for tasks that require electricity in areas where it may not be readily available.

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  • 42. 

    Which of the follwoing would be allowed to operate inside the open fuel system repair area?

    • Air purifier cart, HDU/13 heater, or BT-400 heater

    • Defueling truck, tow vehicle, or MA-1 blower

    • AGE tractor, BT-400 heater, or MA-1 blower

    • Air purifier cart, HDU/13 hearter, or MA-1 blower

    Correct Answer
    A. Air purifier cart, HDU/13 hearter, or MA-1 blower
    Explanation
    The air purifier cart, HDU/13 heater, and MA-1 blower would be allowed to operate inside the open fuel system repair area.

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  • 43. 

    Which flight control surface controls the directional movement about the axis of an aircraft?

    • Critical

    • Primary

    • Auxiliary

    • Secondary

    Correct Answer
    A. Primary
    Explanation
    The primary flight control surface that controls the directional movement about the axis of an aircraft is the rudder. The rudder is located on the vertical stabilizer of the aircraft and is used to control the yawing motion of the aircraft. By deflecting the rudder, the pilot can make the aircraft turn left or right. The other options, critical, auxiliary, and secondary, are not specifically related to the control of directional movement.

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  • 44. 

    Which type of tubing defect would be considered acceptable?

    • A dent measuring 35% of the tubing diameter

    • Several nicks measuring 15% of the tubing wall thickness

    • A scratch that measures 25% of the tubing wall thickness

    • A dent on the heel of a bend with less than the recommended radius

    Correct Answer
    A. Several nicks measuring 15% of the tubing wall thickness
  • 45. 

    Moderate corrosion is normally removed from an aircraft surface by 

    • Light hand scrubbing

    • Scrubbing with steel wool

    • Light mechanical sanding

    • Brushing with a steel wire brush

    Correct Answer
    A. Light mechanical sanding
    Explanation
    Moderate corrosion on an aircraft surface is typically removed by light mechanical sanding. This process involves using sandpaper or a similar abrasive material to gently remove the corroded layer, without causing damage to the underlying surface. Light hand scrubbing, scrubbing with steel wool, and brushing with a steel wire brush may be too aggressive and could potentially cause further damage to the aircraft surface. Therefore, light mechanical sanding is the most appropriate method for removing moderate corrosion.

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  • 46. 

    You should not apply sealant to an aircraft surface if the temperature is less than

    • 70 F

    • 60 F

    • 55 F

    • 50 F

    Correct Answer
    A. 60 F
    Explanation
    Sealant should not be applied to an aircraft surface if the temperature is less than 60 F. This is because sealants require a certain temperature range to properly cure and adhere to the surface. If the temperature is too low, the sealant may not cure properly and may not provide the necessary protection and sealing properties. Applying sealant at temperatures below the recommended range can lead to ineffective sealing and potential damage to the aircraft.

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  • 47. 

    Which type of attachment should you use on the fuel cell pneumatic buffer to buff bladder cells and flanges?

    • Buffing arbor

    • Buffing pad

    • Buffing band

    • Buffing stone

    Correct Answer
    A. Buffing stone
    Explanation
    A buffing stone is the appropriate attachment to use on the fuel cell pneumatic buffer for buffing bladder cells and flanges. A buffing stone is a hard abrasive stone that is capable of removing surface imperfections and smoothing out rough areas. It is commonly used in automotive and aerospace industries for polishing and finishing metal surfaces. The other options, such as buffing arbor, buffing pad, and buffing band, are not suitable for buffing bladder cells and flanges.

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  • 48. 

    Which maintenance stand can easily be moved by one person?

    • B-1

    • B-2

    • C-1

    • Mainlift

    Correct Answer
    A. C-1
    Explanation
    The maintenance stand that can easily be moved by one person is C-1.

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  • 49. 

    Mixed sealant should be discared when it

    • Will not wet the surface

    • Is uniform in color

    • Has a strong odor

    • Flows too easily

    Correct Answer
    A. Will not wet the surface
    Explanation
    When a mixed sealant will not wet the surface, it means that it is not able to spread evenly and adhere properly to the surface it is being applied to. This can be due to various reasons such as the wrong consistency or improper mixing of the sealant. In such cases, the sealant will not be effective in creating a proper seal and should be discarded.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 29, 2010
    Quiz Created by
    Rdjvelasquez

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