02AF1 - General
In a balance computation of an aircraft from which an item located aft of the datum was removed, use
(-)weight X (+)arm (-) moment
If a 40-pound generator applies +1400 inch-pounds to a reference axis, the generator is located
+35 from the axis
What is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?
.0125 uF
In the flammability, reactivity, and health blocks of the SDS risk diamond there are the numbers
0-4. Zero represents little or no hazard to the user while four means that the material is very hazardous.
Certificated mechanics with a powerplant rating may perform
100-hour inspections required by the Federal Aviation Regulations on powerplants, propellers, or any components thereof, and may release the same to service
A rectangular-shaped fuel tank measures 60 inches in length, 30 inches in width, and 12 inches in depth. How many cubic feet are within the tank?
12.5
A 48-volt source is required to furnish 192 watts to a parallel circuit consisting of three resistors of equal value. What is the value of each resistor?
36 ohms
The maximum distance between end fittings to which a straight hose assembly is to be connected is 50 inches. The minimum hose length to make such a connection should be
52-1/2 inches
The rust or corrosion that occurs with most metals is the result of
A tendency for them to return to their natural state.
When the specific torque value for nuts is not given, where can the recommended torque value be found?
AC 43.13-1B
An aircraft owner was provided a list of discrepancies on an aircraft that was not approved for return to service after an annual inspection. Which of the following statements is/are true concerning who may correct the discrepancies?
An appropriately rated mechanic
An aircraft owner was provided a list of discrepancies on an aircraft that was not approved for return to service after an annual inspection. Which of the following statements is/are true concerning who may correct the discrepancies?
An appropriately rated mechanic.
Nickel-cadmium battery cases and drain surfaces which have been affected by electrolyte should be neutralized with a solution of
Boric Acid
How are aviation fuels, which possess greater antiknock qualities than 100 octane, classified?
By performance numbers
14 CFR part 21
Certification Procedures for Products and Parts
What is the class of working drawing that is the description/depiction of a single part?
Detail Drawing
What nondestructive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?
Eddy Current Inspection
Newton's first law of motion (law of inertia)
Every body persists in its state of rest, or of motion in a straight line, unless acted upon by some outside force.
Three things are required for a fire. Remove any one of them and the fire extinguishes.
Fuel Heat Oxygen
14 CFR part 91
General Operating and Flight Rules
Which would have an effect on aircraft CG results when conducting a weight and balance check?
Leaving the downlocks installed
14 CFR part 43
Maintenance, Preventive Maintenance, Rebuilding, and Alterations
All of the following are consequences of human error, except
Mental Stressor
The presence of any small amount of potassium carbonate deposits on the top of nickel-cadmium battery cells in service is an indication of
Normal Operation
Certificated mechanics, under their general certificate privileges, may
Perform 100-hour inspection of instruments
There are four colors in the SDS risk diamond, what do they represent?
Red = flammability Yellow = reactivity Blue = Health White = Special Hazard
Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure?
Relative Humidity
What did Dr. James Reason do?
Theorizes human errors
On occasion, a mechanic may need to make a simple sketch of a proposed repair to an aircraft, a new design, or a modification.
This statement is true
Why is it considered good practice to normalize a part after welding?
To relieve internal stresses developed within the base metal
What is the purpose of the ground symbol used in electrical circuit diagrams?
To show that there is a return path for the current between the source of electrical energy and the load.
What FAA-approved document gives the leveling means to be used when weighing an aircraft?
Type Certificate Data Sheet
A fuel that vaporizes too readily may cause
Vapor Lock
What unit is used to express electrical power?
Watt
List a few precautions (when working with machine tools) that can reduce the chance of injury
Wear eye protection; Securely clamp all work; Set the proper revolutions per minute (RPM) for the material used; Do not allow the spindle to feed beyond its limits of travel while drilling; Stop the machine before adjusting work or attempting to remove jammed work; Clean the area when finished
Which of the following logic gates will provide an active high out only when all inputs are different?
XOR
In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes
a large disruption in the magnetic field
Where is the record of compliance with Airworthiness Directives or manufacturers' service bulletins normally indicated?
aircraft maintenance records
What is the means by which the FAA notifies aircraft owners and other interested persons of unsafe conditions and prescribes the condition under which the product may continue to be operated?
airworthiness directives
Product means
an aircraft, aircraft engine, or aircraft propeller
Which statement is true regarding the requirements for maintenance record format?
any format that provides record continuity and includes the required information may be used
Record means
any writing, drawing, map, recording, tape, film, photograph or other documentary material by which information is preserved or conveyed in any format, including, but not limited to, paper, microfilm, identification plates, stamped marks, bar codes or electronic format, and can either be separate from, attached to or inscribed on any product, part, appliance or material.
If work performed on an aircraft has been done satisfactorily, the signature of an authorized person on the maintenance records for maintenance or alterations performed constitutes
approval for return to service only for the work performed
If all, or a significant part of a stall strip is missing on an airplane wing, a likely result will be
asymmetrical lateral control at or near stall angles of attack
If a flared tube coupling nut is overtightened, where is the tube most likely to be weakened/damaged?
at the sleeve and flare junction
(1) In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part. (2) A discontinuity may or may not affect the usefulness of a part.Regarding the above statements,
both of these are true
(1) Bonded clamps are used for support when installing metal tubing.(2) Unbonded clamps are used for support when installing wiring.Regarding the above statements,
both statements are true
How is the locking feature of the fiber-type locknut obtained?
by the use of an unthreaded fiber locking insert
Airworthiness Directives are issued primarily to
correct an unsafe condition
How is a flooded engine, equipped with a float-type carburetor, cleared of excessive fuel?
crank the engine with the starter or by hand, with the mixture control in cutoff, ignition switch off, and the throttle fully open, until the fuel charge has been cleared
Which of these will cause the resistance of a conductor to decrease?
decrease the length or increase the cross-sectional area
The temperature to which humid air must be cooled at constant pressure become saturated is called
dewpoint
A hydraulic system schematic drawing typically indicates the
direction of fluid flow through the system
A simple way to find the center of a circle on a sketch or drawing, or a circular piece of material is to
draw two non-parallel chord lines across the circle and then a corresponding perpendicular bisector lines across each chord line
Frayed surfaces cause concern in chemical cleaning because of the danger of
entrapping corrosive materials
What may result if water is added to a nickel-cadmium battery when it is not fully charged?
excessive spewing is likely to occur during the charging cycle
When starting and ground operating an aircraft's engine, the aircraft should be positioned to head into the wind primarily
for engine cooling purposes
Diffusion is not considered a method of
heat transfer
Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?
high temperature with high humidity
The electrolyte of a nickel-cadmium battery is the lowest when the battery is
in a discharged condition
Why should an aircraft maintenance technician be familiar with weld nomenclature?
in order to gain familiarity with the welding technique, filler material, and temperature range used
The desired effect of using winglets on an aircraft's wingtips is to
increase the lift to drag ratio
An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?
inductance and frequency
Class C fire
involve energized electrical wiring and equipment
Class B fire
involve flammable petroleum products or other flammable or combustible liquids, greases, solvents, paints, and so forth.
Class A fire
involve ordinary combustible materials such as wood, cloth, paper, upholstery materials, ect
When an airworthy (at the time of sale) aircraft is sold, the Airworthiness Certificate
is transferred with the aircraft
Both gasoline and kerosene have certain advantages for use as turbine fuel. Which statement is true in reference to the advantages of each?
kerosene has a higher heat energy/value per unit volume than gasoline
What is the maintenance recording responsibility of the person who complies with an Airworthiness Directive?
make an entry in the maintenance record of that equipment
What may be used to check the stem on a poppet-type valve for stretch?
micrometer
The replacement of a damaged engine mount with a new identical engine mount purchased from the aircraft manufacturer is considered a
minor repair
The three types of human error are
omission, commission, and extraneous
An Airworthiness Directive requires that a propeller be altered. Certificated mechanics could
perform and approve the work for return to service if it is a minor alteration
The boiling point of any given liquid varies directly with
pressure
The direction that aircraft are to be parked and tied down is determined by
prevailing or forecast wind direction
Alclad is a metal consisting of
pure aluminum surface layers on an aluminum alloy core
For aircraft operated under part 91, which of the following records must be retained for at least one year, or until the work is repeated or superseded?
records of maintenance, alterations, preventative maintenance, 100 hour, annual, and progressive inspections
For aircraft operated under part 91, which of the following records must be retained and transferred with the aircraft when it is sold?
records of the current status of applicable AD's, and date and time when recurring AD's are next due
What is descriptive of the annealing process of steel during and after it has been annealed?
slow cooling; low strength
If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a
small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
Capacitors are sometimes used in dc circuits to
smooth out slight pulsations in current/voltage
What is generally used in the construction of aircraft engine firewalls?
stainless steel
A fiber-type, self-locking nut must never be used on an aircraft if the bolt is
subject to rotation
How can the dimensional inspection of a bearing in a rocker arm be accomplished?
telescopic gauge and micrometer
Airworthiness means
the aircraft conforms to its type design and is in a condition for safe operation
What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?
the current is stepped down by a 1 to 4 ratio
If a hot start occurs during starting of a turbine powerplant, what is the likely cause?
the fuel/air mixture was excessively rich
High temperature and high humidity are the atmospheric conditions that will cause the true landing speed of an aircraft to be
the greatest
In the four-digit aluminum index system number 2024, the first digit indicates
the major alloying element
Which of the following statements is true regarding minimum allowable bend radii for 1.5 inches OD or less aluminum alloy and steel tubing of the same size?
the minimum radius for steel is greater than for aluminum
An aircraft was not approved for return to service after an annual inspection and the owner wanted to fly the aircraft to another maintenance base. Which statement is correct?
the owner must obtain a special flight permit
Aspect ratio of a wing is defined as
the ratio of the wingspan to the mean chord
A repair, as performed on an airframe, shall mean
the restoration of the airframe to a condition for safe operation after damage or deterioration
Absolute humidity is the actual amount of
the water vapor in a mixture of air and water
The twist of a connecting rod is checked by installing push-fit arbors in both ends, supported by parallel steel bars on a surface plate. Measurements are taken between the arbor and the parallel bar with a
thickness gauge
Class D fire
usually involves magnesium in the shop, or in aircraft wheels and brakes, or are the result of improper welding operations.
The speed of sound is most affected by
variations in ambient temperature
How may magnesium engine parts be cleaned?
wash with a commercial solvent, decarbonize, and scrape or grit blast
Which aircraft record entry best describes a repair of a dent in a tubular steel structure dented at a cluster?
welded a reinforcing plate over the damaged area
If both the volume and the absolute temperature of a confined gas are doubled then the pressure
will not change
