A&P Aviation Mechanic Technician Practice Test

These questions are part of the practice quiz. Start practicing

• What types of precision measuring instruments can be used to measure the outside dimensions of aircraft parts?
• How can one differentiate between AN fittings and AC fittings?
• What is the value for temperature on a standard day at sea level?
• For a correctly made weld, what should the bead width be relative to the thickness of the base metal?
• Which regulation authorizes a certificated mechanic with an Inspection Authorization to approve or disapprove a major repair or alteration?
• What should an aircraft technician do if they suspect a hydraulic lock?
• What might cause a nickel-cadmium battery to fail to deliver its rated capacity?
• What defines matter?
• Which area is most likely to require regular inspection to prevent corrosion?
• Why should separate facilities be used for storing and servicing nickel-cadmium and lead-acid batteries?
• What is the purpose of an aircraft loading graph?
• What are the two methods for determining the arm of an item of equipment?
• How do you divide one fraction by another?
• Which rotorcraft systems must be inspected according to the manufacturer's maintenance manual during a FAR Part 91 required inspection?
• Where can you find the minimum scope and detail requirements that a 100-hour inspection checklist must contain?
• What must be done to establish new weight and balance records if all records for an aircraft are missing?
• Why are quick disconnect fittings utilized in aviation?
• Which of the following is a reason for using recommended cleaners on aircraft fabrics and plastics?
• Under what conditions may automobile gasoline be used in an aircraft engine?
• How do you change a decimal into the nearest equivalent fraction?
• What happens to turbine blades when avgas is used in a turbine engine?
• What shape does a rectangle have compared to a trapezoid?
• What does the number 100 signify in 100LL aviation gasoline?
• How can you determine the moment of an item of equipment?
• What is a potential consequence of using a mixture of aviation gasoline and jet fuel in a reciprocating airplane engine?
• What is one area of an aircraft that is prone to corrosion?
• How can you determine the permissible oil grade for an aircraft?
• What is the name for a part of a drawing used to highlight important details?
• During autorotation, which direction does the airflow move compared to normal flight?
• When should a reciprocating engine be pre-oiled?
• What is one safety procedure to observe when hand-propping a small aircraft engine?
• How does blade flapping in helicopter rotors help manage lift?
• What is one advantage of using pre-preg (pre-impregnated) materials?
• How can one determine if a flexible hose is correctly installed?
• What percentage should the penetration of a fillet weld be relative to the thickness of the base metal?
• What should be done to detect a possible hydraulic lock in a large engine prior to starting it?
• What is the grip length of a bolt?
• What is a legal requirement before performing an annual or 100 hour inspection on an aircraft?
• How are dimensions shown on aircraft drawings?
• Why can't the state of charge of a nickel-cadmium battery be determined by measuring specific gravity?
• What markings are required for fuel filler openings in reciprocating engine-powered airplanes?
• What does "clearance" refer to in the context of aircraft drawings?
• What is the function of the datum in aircraft measurements?
• What is ballast in an airplane?
• What reference can determine if an aircraft is certificated in more than one category?
• What are the two different ways that a ratio may be expressed?
• If the resistance in a DC circuit is constant and the voltage doubles, what happens to the current?
• What is the best way to protect piano hinges from corrosion?
• What are some advantages of Teflon tubing used in aviation?
• What are the four principal forces acting on an airplane in flight?
• For how long must an aircraft owner maintain the records of a 100-hour inspection?
• What do the markings on the heads of solid rivets indicate?
• Which publication provides guidelines to develop a checklist for annual or 100-hour inspections?
• What is one of the first steps before hand-propping an engine?
• What are the three forms or types of DC circuits?
• For serviceable dimensional limits of an engine part, which publication should be consulted?
• In addition to secure clamping, what is another requirement for installing metal fuel, oil, and hydraulic lines?
• What is the purpose of Advisory Circulars in aviation?
• How can inductance be defined?
• What is a principal advantage of AC current over DC current?
• What kind of information can typically be found in the title block of an aircraft drawing?
• How many copies of FAA Form 337 are typically prepared when required, and what is their distribution?
• How can you identify a flareless fitting compared to a flare-type fitting?
• What should be done to protect aircraft surfaces during refueling?
• What is the primary precaution to take when starting and running an aircraft engine?
• What maintenance record entries are required to contain the aircraft total time in service?
• If maintenance procedures do not specify a torque value, what should you do?
• Who is authorized to rebuild an aircraft engine and return the operating time to zero?
• Which document contains specifications for the maintenance of aircraft components?
• How should fuel be accounted for when weighing an aircraft?
• What is a key characteristic of Teflon tubing?
• Why are Airworthiness Directives (ADs) issued by the FAA?
• What are the two types of fluid lines commonly found in aircraft?
• Which electrical values are typically measured by a multimeter?
• What is a common practical application of Ohm's law?
• What method does the FAA use to inform aircraft owners of the need to correct unsafe conditions?
• What is the primary function of wing-mounted vortex generators?
• What change occurs in airflow during a helicopter's transition from normal flight to autorotation?
• What is the primary purpose of schematic diagrams?
• In which publication can a mechanic find an example of a maintenance record entry for a 100-hour inspection?
• How are updates to Airworthiness Directives issued to subscribers?
• What are visible signs of fretting corrosion?
• In DC circuits, what unit is used to measure power?
• What can foreign objects like rocks or loose hardware cause during ground operations?
• What is the key step for adding or subtracting unlike fractions?
• How is 100,000 expressed using powers of 10?
• What is the approximate speed of sound at sea level on a standard day?
• What are the three primary elements of Ohm's law?
• What is the name of the manual provided by manufacturers to technicians for aircraft system work?
• What is the atmospheric pressure at sea level on a standard day?
• What is the first step involved in a dye penetrant inspection?
• What materials are commonly used as reinforcing components in composite structures?
• What are possible outcomes of using a lower grade of avgas than specified?
• What occurs if a flareless fitting is overtightened on a tube?
• Why is it important for an aircraft technician to know standard light signals?
• How can a fraction be converted into a decimal?
• What is a major disadvantage of using steel brushes on aluminum surfaces?
• Where should a 100-hour inspection be recorded?
• What is the result of adding a large positive number and a smaller negative number?
• What does a straight lay line on a flexible hose indicate?
• What does the regulation require regarding the disposition of records of Airworthiness Directives when an aircraft is sold?
• How are sizes of flexible hoses designated?
• What criteria are used to classify metal tubing according to size?
• What operation is used to find the square of a number?
• What does tare weight refer to in the context of aircraft weighing?
• What component creates capacitance in AC circuits?
• What type of cleaning agents should be used to remove grease, oil or fuel from aircraft tires?
• What is essential to keep in mind about cleaning tools for aluminum?
• During a dye penetrant inspection, what process allows the penetrant to enter a crack?
• What is the most commonly used knot for tying down small aircraft?
• Why is alloy steel that responds to heat treatment generally less suitable for welding?
• Why are piano-type hinges prime spots for corrosion?
• In the event of an engine induction fire while starting a reciprocating engine, what is the correct procedure?
• When installing stainless steel tubing, which type of fitting should be utilized?
• What defines whether a repair is classified as major or minor?
• What formula expresses the relationship between force, pressure, and area?
• What is a common type of matrix material used in aircraft composite laminates?
• What is one method to correct the issue of exceeded forward C.G. limit after installing new radios in an aircraft?
• How would you describe an orthographic projection?
• What is an effect of using inappropriate fuel in an aircraft engine?
• In which three states can matter exist?
• In which document are service bulletins typically summarized?
• What kind of publications do manufacturers use to notify owners of design defects?
• What characteristic indicates a cold weld?
• What is typically included in an aircraft drawing’s revision block?
• Who can make the required maintenance entry approving the return to service after a progressive inspection performed away from the aircraft's home base?
• What items must be entered into the aircraft records after maintenance is performed?
• What is the angle between the relative wind and the chord line of an airfoil called?
• What role does a fire guard play during engine start procedures?
• Which of the following factors is NOT associated with corrosion?
• What factors determine density altitude?
• Who has access to notices regarding Airworthiness Directives?
• How does a capacitor store electricity?
• What is the difference between an "allowance" and a "tolerance"?
• How many views are ordinarily required to represent important details of most aircraft parts?
• How many watts are in one kilowatt?
• Which type of resin is commonly used for aircraft windshields?
• When towing an aircraft, which brakes should be used to stop the aircraft?
• Which law describes the fundamental relationship in electrical circuits?
• What is the approximate value of Pi?
• What causes hydraulic lock in large radial engines?
• Where must records of a major alteration be made?
• What formula is used to find the area of a triangle?
• What are the penalties for making fraudulent or intentionally false entries in any required record or report?
• What is done after removing the penetrant in a dye penetrant inspection?
• What causes an airplane wing to stall?
• What is the preferred cleaner for plastic surfaces such as windshields?
• What type of non-destructive testing can be used on aluminum parts to detect surface defects?
• What is a proportion?
• What materials are commonly used as heavy duty cleaners?
• What components make up a flareless tube fitting?
• What kind of issues are addressed in Service Bulletins issued by manufacturers?
• What are the principal effects of lowering the flaps during flight?
• Which of the following is typically found in the identification markings on flexible hoses?
• If an aircraft is overloaded to exceed the aft center of gravity limit, what is a likely outcome?
• What are the three causes of opposition to current flow in an AC circuit?
• Which is a sign of proper maintenance regarding engine oil?
• Which property is NOT a characteristic of matter?
• Will certificated mechanics automatically receive all Airworthiness Directives?
• What is the primary purpose of using symbols on aircraft drawings?
• Which part of the FARs specifies the performance characteristics for small aircraft to be considered airworthy?
• What is meant by the root of a number?
• What is specified for oil tank filler markings in piston engine powered airplanes?
• How can you keep heat treated aluminum alloy rivets soft enough to install after the quenching process?
• What is the method to convert a fraction into a percent?
• What is the process called that strengthens metal through cold working?
• What is the consequence of cleaning anodized aluminum surfaces incorrectly?
• What is a trapezoid?
• What two primary factors may cause the development of stress corrosion cracks?
• What does Mean Aerodynamic Chord (MAC) signify?
• What happens when airflow separates from the upper surface of a wing?
• What does the term "Hot Start" refer to in jet engine operation?
• Which mechanism is used in helicopters for lift adjustment during flight?
• What are indications of water in aircraft fuel after draining a sample?
• Why should a micrometer be periodically calibrated?
• Which method is one way to level an aircraft?
• What is the primary function of the sleeve on a flared-tube fitting?
• What precaution should be observed when washing an airplane?
• Under what circumstances are more than two copies of form 337 required?
• How is the location of the center of gravity (C.G.) commonly represented?
• How are AN standard steel bolts identified?
• How can a decimal be converted into a percent?
• How is the compliance timeframe for Airworthiness Directives determined?
• What is the term that describes the ratio of moisture in the air compared to its maximum capacity?
• How often is the summary of Airworthiness Directives published?
• What is the purpose of "center lines" in aircraft drawings?
• Where can you find leveling instructions for an aircraft?
• What should be done with equipment not permanently installed in the aircraft before weighing?
• What action should be taken to achieve a positive (plus) moment aft of the datum?
• Who makes the final maintenance record entry after a 100-hour inspection is completed?
• How does the category of an aircraft affect its loaded weight?
• How can the effect of added equipment on weight and balance be determined without re-weighing the aircraft?
• What part of the FARs outlines the airworthiness standards for Transport Category airplanes?
• What precaution must be taken when deburring a tube after it has been cut?
• What regulation prescribes requirements for issuance of a type certificate?
• What three elements are required to form an electrical circuit?
• When must a correction be applied to the specific gravity reading of a lead-acid battery electrolyte?
• How can you determine if an aircraft part or appliance is serviceable?
• Why is it important to use common symbols in aircraft drawings?
• When operating an engine with a potential hydraulic lock, what resistance during prop turning indicates a problem?
• Which types of flares are most commonly used on aircraft tubing?
• Where can you find the standard aircraft taxi hand signals?
• What publication would you consult to determine an aircraft's type design and its limitations?
• What is the common method to simplify computations with very large or small numbers?
• When is compliance with a manufacturer's service bulletin considered mandatory?
• What precaution should be taken when fueling an aircraft?
• What percent of the total length of a flexible hose should be added for movement under pressure?
• Why should aluminum metal polish be avoided on anodized aluminum surfaces?
• Who is ultimately responsible for ensuring the use of the most current information during aircraft maintenance?
• What is defined as any fuel remaining in the tanks after the system has been drained?
• Which procedure is important for maintaining aircraft integrity?
• How is "time-in-service" defined in relation to maintenance record entries?
• What tools are recommended to remove corrosion from anodized aluminum surfaces?
• What is the difference between "overhauled" and "rebuilt" engines in aircraft maintenance?
• Why is it crucial to control the weight and balance of an aircraft?
• Which procedure will produce a negative (minus) moment forward of the datum?
• What does a "bill of materials" signify in an aircraft drawing?
• What indicates if a drawing has been modified?
• After applying the penetrant in a dye penetrant inspection, what is the next step?
• How can Ohm's law be written as an equation?
• What property of an AC circuit is defined by the term impedance?
• What are visible signs of filliform corrosion?
• How does the center of gravity (C.G.) range of helicopters compare to that of fixed-wing airplanes?
• What is a common cause of filliform corrosion?
• Once the developer is applied in dye penetrant inspection, what is the final step?
• What is the most commonly used type of aircraft control cable?
• In aircraft drawings, how can the size of an object be accurately represented?
• What is kinetic energy?
• What is the definition of friction in physics?
• What might happen if a flare-type fitting is over-tightened?
• What is the specific gravity range of a fully charged lead-acid battery?
• What distinguishes AN fittings from AC fittings?
• What documents must be prepared when a required inspection finds defects that render the aircraft or engine unairworthy?
• Which FAA publication lists engines approved for use in specific make and model airplanes?
• What is the proper action if an engine does not start and fire continues during a start attempt?
• What effect does increased voltage have in a constant resistance circuit?
• What is the purpose of a Type Certificate Data Sheet?
• Which of the following is a form of corrosion?
• Which publication might be consulted for maintaining an older aircraft without a maintenance manual?
• What kind of parts can be represented by one-view drawings?
• How can a negative (minus) moment aft of the datum be achieved?
• What differentiates a close tolerance bolt from a general purpose bolt?
• How many cells does a 24-volt lead-acid battery have?
• What distinguishes a thermosetting resin from a thermoplastic resin?
• For what types of applications are self-locking nuts not allowed?
• What are the first steps in conducting a magnetic particle inspection?
• What is the formula for the area of a rectangle?
• What does Pi represent in geometry?
• What does "residual oil" refer to?
• Is it permissible to use avgas in a turbine engine?
• Which type of lines are used to show alternate positions in aircraft drawings?
• During ground operations, what is a potential hazard related to engine run-up?
• What are common light-duty cleaning agents used in aircraft cleaning?
• What should be done to obtain a positive (plus) moment forward of the datum?
• Which of the following tools is commonly used to assist in making visual inspections of welds?
• How are hidden views represented in aircraft drawings?
• What is the formula for calculating the area of a circle?
• How do quick disconnect couplings operate?
• Which of the following is NOT a method of determining the area of a geometric shape?
• What is the primary purpose of Alodine?
• Which of the following is NOT a procedure used to prevent corrosion?