Aviation Machinist Mate (AD) Week 1 Practice Test

These questions are part of the practice quiz. Start practicing

• What is the primary function of a bearing?
• Which component in a hydraulic system is primarily used to limit system pressure by venting fluid when pressure is exceeded?
• Energy is defined as which of the following?
• Which fuel nozzle type is most widely used and provides good spray characteristics under all operating conditions?
• What is the function of a hydraulic accumulator?
• What information is typically included on maintenance tags or records?
• In a four-stroke cycle, which sequence correctly lists the stages?
• Which component in the exhaust section collects and delivers gases to the exhaust nozzle?
• What safety practice should you follow when using a multimeter on an energized circuit?
• What is the primary role of a regulator in pneumatic systems?
• Which type of pressure is described as existing in a confined space and not causing motion?
• In a convergent flow, what happens to velocity and pressure?
• Aluminum alloys such as 2024 and 7075 are commonly used in aircraft structures primarily due to which property?
• Explain the difference between a flush head rivet and a solid rivet and where each is typically used.
• What measurement indicates average roughness?
• Why adjust for zero error when reading an outside micrometer?
• Which of the following statements about corrosion prevention through cleaning and maintenance is correct?
• Which equation represents Newton's second law?
• Why is calibration important when selecting a torque wrench?
• Which statement about fusible links is correct?
• Why is electrical grounding important in aircraft systems?
• In a hydraulic system, relief and control valves primarily serve what function?
• Where is the exhaust nozzle located and what is its purpose?
• What is corrosion and one basic method to prevent it on aluminum airframes?
• Why is viscosity important when selecting aviation lubricants?
• In the concept of the three process machine principle, which term describes energy Expended?
• What does a hydraulic filter do and why is cleanliness crucial?
• What is the primary purpose of the personal protective equipment (PPE) on the flight line, and which three items are commonly used?
• Describe the difference between torque and preload in a fastener and why preload is critical in aircraft joints?
• Why is it important to keep detailed maintenance records?
• In jet propulsion, the jet nozzle primarily serves to do what?
• Barometric pressure at standard conditions is measured as which of the following?
• What statement about open-center hydraulic systems is true?
• What is the purpose of the drain valve in a lubrication system?
• What should you examine for water contaminant indicators in fuel?
• On a Standard Day, what is the standard temperature in Fahrenheit?
• What is the primary purpose of a spark plug?
• What percent of Earth's atmosphere is inert gas?
• The passages and tubing in the accessory drive train are used for what function?
• What does an engine oil pressure reading indicate?
• What is the purpose of a drain valve in a lubrication system?
• List three general methods for preventing corrosion on aircraft surfaces.
• How do positive displacement pumps differ from centrifugal pumps?
• What is the purpose of a torque wrench and what should be done before use?
• Compressor blades can be made from which materials?
• Why is proper torque sequence important when tightening multi-bolt flange joints?
• Which instrument can measure inside, outside, and depth dimensions?
• What is surface roughness and how is it quantified?
• Which unit is used on the barometric scale to express standard atmospheric pressure?
• What is the basic purpose of the lubrication system in an engine?
• What is the role of contaminant control in hydraulic systems?
• What is the purpose of an environmental protection program in an aviation maintenance shop?
• What is the difference between dimensional tolerance and geometric tolerance on a drawing?
• Which entry in a maintenance logbook is used to document tasks, parts used, hours, and conditions for traceability?
• What is the purpose of cleaning and inspecting components before reassembly?
• Radiation involves what mechanism?
• Which of the following is NOT listed as a component of the combustion chamber?
• In a can-annular combustion chamber, how are the individual chambers arranged?
• Which of the following is NOT a common sign of low oil level?
• What does engine oil pressure indicate?
• Which statement best defines velocity?
• What does the Single Rotor (solid-spool) configuration imply about the rotating blades?
• Which statement about bearings is correct?
• Valve clearance (lash) is the gap between the valve stem and which component?
• Power is defined as what?
• Describe a basic approach to diagnosing an abnormal reading on a pressure gauge.
• The exhaust section consists of which components?
• Which statement best captures the difference between torque value and torque angle?
• Barometric pressure on a Standard Day corresponds to which equivalent PSI?
• What is the purpose of a dry-run test after reassembly of a mechanical system?
• Why is a torque sequence used during assembly?
• The turbine rotor assembly consists of which components?
• What does Newton's third law state?
• Which device is designed to deliver a fixed amount of fluid per rotation in hydraulic systems?
• Thrust is defined as which of the following?
• In the exhaust section, what is the function of the inner cone?
• What is meant by static vs dynamic pressure in hydraulic systems?
• How does air cooling differ from liquid cooling in aircraft engines?
• What is the purpose of Lockout/Tagout (LOTO) procedures when servicing electrical systems?
• What is a common consequence of introducing contaminants into hydraulic components during assembly?
• Which record is used to document tasks, parts used, hours, and conditions for traceability?
• What basic method helps prevent corrosion on aluminum airframes?
• Which statement best describes the difference between AC and DC in terms of current direction?
• What is the four-stroke cycle in a typical spark-ignition piston engine?
• In Boyle's Law, which variable is held constant?
• What does Pascal's Law state about pressure in an enclosed fluid?
• What is the purpose of applying preload before rotational tightening in some fasteners?
• What is the difference between a switch and a circuit breaker?
• Convection is best described as what?
• What is the correct use of go/no-go gauges?
• What is the primary purpose of the exhaust section?
• What is a clearance fit and aviation example?
• Which material is commonly used in aircraft structural components for strength and lightness?
• Why is lubrication applied to threaded fasteners during installation?
• How does a turbine engine generate thrust differently from a piston engine?
• Fuel nozzles are components of which assembly?
• Which trio of components is commonly found in a hydraulic system?
• What hazards is PPE designed to protect against in aircraft maintenance?
• In electrical testing, what does a continuity test verify?
• According to Newton's second law, acceleration is inversely proportional to the object's what?
• What is the purpose of fuel injectors or a carburetor in engines?
• Name a common type of seal used in aircraft hydraulic systems and its basic principle.
• What is the function of a gear pump in hydraulics?
• Why is grounding and bonding important when fueling aircraft?
• Which factor affects thrust the least?
• Which sequence of steps is correct when troubleshooting a stuck hydraulic valve?
• Stator vanes are attached by which method?
• What is the purpose of an oil cooler?
• Where is an oil pressure sensor typically located in many aircraft engines?
• If a torque wrench is miscalibrated and used to tighten a fastener, which outcome is most likely?
• Which of the following is a sign of a hydraulic leak in a system?
• What is the primary function of a hydraulic valve?
• Which cooling method uses coolant circulated through passages in the engine to remove heat?
• Which statement correctly describes Charles' Law?
• When troubleshooting a stuck hydraulic valve, why is contamination check important?
• Name two common jet fuels used in naval aviation and one property they share.
• In a dual-rotor axial flow compressor, which rotor is driven by the first stage turbine?
• Where is the PTO located relative to the compressor bulb?
• Which statement best describes JP-5 and JP-8?
• What describes a closed-center hydraulic system?
• Which of the following describes a purpose of the accessory section?
• Which heat transfer method involves heat moving through a fluid or between surfaces due to fluid flow?
• In a pneumatic system, what does maintaining a stable downstream pressure achieve?
• What is proper handling practice for cutting oils and solvents?
• Why is interpreting manufacturing drawings essential for AD technicians?
• What is the second most abundant gas in Earth's atmosphere?
• How do you read a standard outside micrometer in inches?
• Name three components of a typical oil filtration system.
• In the accessory section, where are gearboxes normally located?
• What happens if preload in an aircraft fastener is not adequate?
• In Charles' Law, which variable is held constant?
• What does a dry-run test verify before introducing fluids?
• Some front frames may provide mounting for what?
• Which component in an oil filtration system helps prevent restriction of oil flow when the filter is clogged?
• How is hydraulic system pressure typically generated in aircraft?
• Where are insulation blankets placed on an aircraft engine system?
• Motion is defined as what?
• What is the Brayton cycle?
• What is the typical order of operations when disassembling a system for inspection?
• On a Standard Day, the wind velocity is specified as which of the following?
• What is the purpose of a water separator in aviation fuel systems?
• What is weight?
• Absolute pressure is defined as the sum of atmospheric pressure and system pressure starting from what reference point?
• What does Newton's First Law state?
• What is a go/no-go gauge used for?
• Which device in aircraft electrical systems automatically interrupts current during faults?
• What is the difference between AC and DC electricity?
• Which statement about tolerances on engineering drawings is true?
• In turbine engine maintenance, which components are typically inspected for performance and integrity?
• What is the purpose of the combustion section?
• What is the typical difference in maintenance focus between piston and turbine engines?
• Why is fuel-air ratio monitoring important in modern engines?
• Exit guide vanes function to:
• Which term refers to the section that houses engine-driven accessories?
• Which system uses pressurized fluid to transmit force?
• Name two indicators that require oil system inspection.
• What is a fusible link and its purpose in aircraft electrical systems?
• Which of the following is typically included on maintenance tags or records?
• Name two safety checks you perform before starting maintenance on aircraft systems.
• What is the purpose of a fuel filter in the fuel system?
• Which term describes pressure in relation to atmospheric pressure?
• In hydraulic systems, dynamic pressure is influenced by which factor?
• Which type of pressure is caused by the motion of a fluid?
• Define corrosion and name two common forms that affect aircraft structures.
• Where are exit guide vanes located?
• Standard atmospheric pressure in PSI?
• Which heat transfer method can occur in a vacuum?
• What measurement tools would you use to verify external dimensions within a few thousandths of an inch, and when would you use each?
• In conduction, how is heat transferred between substances?
• What is a primary safety hazard when handling aviation fuels?
• What is the difference between preventive maintenance and corrective maintenance?
• A Standard Day is defined by which pair of conditions?
• The compressor rotor assembly consists of which components?
• Which of the following is an example of heat transfer by conduction in aviation systems?
• What is a common aviation example of a clearance fit?
• Which type of turbine blade is used in high thrust engines?
• What unit is used to measure electrical resistance?
• The turbine rotor disk functions mainly as which entity?
• In a can-annular arrangement, what is the purpose of placing individual chambers side by side within a single casing?
• How is force defined in this context?
• What is the purpose of the fuel-priming system?
• Name two common thread standards used in aircraft hardware and indicate how you determine which to use.
• What type of air does the compression section provide?
• Weep vs major leak in hydraulic systems?
• What is the difference between hydraulic fluid and lubricating oil in terms of function?
• How is pressure defined?
• What is the function of a thread gauge in fastener inspection?
• The turbine rotor blade's primary function is to extract energy from expanding gases and transfer it to which component?
• What is the main purpose of the turbine section?
• Geometric tolerance on a drawing addresses which aspects?
• Which device stores hydraulic energy and smooths pressure fluctuations?
• What is the function of a thermostat in a liquid-cooled engine?
• Explain what a heat exchanger does in engine or environmental control systems.
• Why is cleanliness crucial when assembling hydraulic components?
• Which rivet type is typically used in structural joints to provide greater strength?
• What component controls valve timing in a cam-in-block engine?
• What is the role of a hydraulic filter?
• What is the primary function of the diffuser in a gas turbine engine?
• What is the function of a fuel pressure regulator?
• Which document provides safety information such as hazards, handling, and first-aid information for cutting oils and solvents?
• Atmosphere of Earth composition: what are the major gases?
• What hazard does static electricity pose during fueling?
• Why check upstream and downstream components when diagnosing gauge readings?
• In aircraft fuel systems, what is the main function of a fuel filter?
• What does a vernier caliper measure, and what is its least count?
• Which statement best describes the roles of protective coatings/primer and sealants in corrosion prevention?
• How are compressor blades attached to the compressor disks?
• In the accessory section, where is the Power Take-Off (PTO) located?
• Which statement reflects Bernoulli's principle?
• Why are inlet guide vanes hollow?
• What parameter does a thermocouple provide an electrical signal for?
• A thermocouple is primarily what type of sensor?
• Why is valve clearance (lash) important in an engine?
• Name the three stages of a pneumatic system's FRL unit and their purpose.
• At constant temperature, pressure and volume are inversely related.
• What does 'continuity' mean in electrical testing?
• What is the purpose of a feeler gauge?
• Net thrust is best described as thrust that is available to power the aircraft in which condition?
• Why is understanding engineering drawings important in maintenance?
• What component houses Inlet Guide Vanes (IGVs) in the front frame?
• In jet propulsion, which component accelerates gas to produce thrust by expelling it through an opening?
• Which cooling method uses coolant circulated through passages in the engine to remove heat?
• Which component in a hydraulic system is responsible for converting mechanical energy into hydraulic energy to move fluid?
• What is quality assurance's role in maintenance?
• What is the purpose of ignitor plugs?
• In a hydraulic system, which components control pressure?
• Before starting work under Lockout/Tagout, what is essential to do?
• Which statement describes annular type combustion chamber?
• Which of the following is a component of the combustion chamber?
• What are the two common configurations of axial flow compressors?
• Static thrust refers to thrust with which condition?
• Which factor affects thrust the most?
• What is the function of a hydraulic relief (safety) valve?
• Which statement best describes the function of a hydraulic reservoir?
• What are common safety practices when working with lubricants and fuels in the shop?
• What does LOCKOUT/TAGOUT mean in maintenance?
• What is the function of a micrometer?