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This "Test Your Knowledge" feature appeared
in the March 1967 issue of American Modeler magazine, immediately following
the "Wanted:
A & P Mechanics - Part II" article (I do not yet have Part I).
Way back in my younger day during the time I was taking flying lessons and thought
a career in flying was the only reasonable path for me, I planned to earn a Airframe &
Powerplant (A&P) license. Destiny had other plans, since when I signed up for
the Delayed Enlistment program with the U.S. Air Force, no aircraft engine mechanic
positions were open, and I ended up in electronics, working on air traffic control
radar maintenance (fixing and aligning, not as an air traffic controller). As you
can see from the test, a masterful grasp on the theory of engine operation and maintenance
was (and still is) required. Back in those days, only the most qualified people
were selected to do the job - lives and fortunes depended on it. Today, one of the
biggest advantages you can have for getting an aircraft mechanic job is not being
a white male of European descent, since governments worldwide have adopter the Diversity,
Equity, and Inclusion (DEI) mindset
that willingly sacrifices expertise for the sake of making people feel good about
themselves.
A & P Sample Test - Test Your Knowledge
To find out something about what an A&P written examination is like and to
test your knowledge of some of the things an aviation mechanic needs to know, try
the following test based on sample written examination questions that are like those
on an FAA mechanic's examination. (You can check your answers with the correct answers
given on page 56).
1. What must a certificated mechanic with both airframe and powerplant ratings
do prior to returning to service an aircraft on which he has performed and approved
a 100-hour inspection?
1) Make the proper entries in the appropriate logbooks.
2) Present his work and records to a mechanic holding an Inspection
Authorization for final approval and release.
3) Complete the required copies of Form FAA-337, including an accurate
description of the work performed, date, mechanic's name, and certificate number.
4) Notify the local FAA maintenance inspector in writing of his intention
to return the aircraft to service.
2. If the container volume of a confined gas is doubled (assume temperature remains
constant) the pressure will:
1) Increase in direct proportion to the volume increase.
2) Remain the same.
3) Be doubled.
4) Be reduced to one-half its original value.
3. As the velocity of the air across an airplane wing increases, the pressure
of the air on the upper-surface:
1) Increases.
2) Decreases.
3) Drops to zero.
4) Remains unchanged.
4. If the cross-section area of a given conductor is increased to four times
its original value and the length and temperature remain constant, the resistance
of the conductor wilt be:
1) One-fourth its original value.
2) Four times its original value.
3) The same as its original value.
4) Found by multiplying the original resistance by the percentage
increase in cross-sectional area.
5. Which of the following sequences of connecting and tightening the battery
leads should result in the safest procedure of installation of a battery in an aircraft
with a single wire ground-return electrical system?
1) Connect and tighten the negative (ground) lead before connecting
the positive lead.
2) Connect the negative (ground) lead, connect the positive lead,
then tighten in the same order.
3) Connect the positive lead, connect the negative (ground) lead,
then tighten in the same order.
4) Connect and tighten the positive lead before connecting the negative
(ground) lead.
6. Which of the following has tittle or no effect upon the rate of vaporization
of a given fuel?
1) The pressure of the surrounding air.
2) The temperature of the fuel.
3) The temperature of the surrounding air.
4) The antiknock value of the fuel.
7. If an aircraft is cruising in level flight and the stick or control column
is moved forward the elevator will:
1) Go down and the nose of the aircraft will go down.
2) Go up and the nose of the aircraft will go down.
3) Go down and the nose of the aircraft will go up.
4) Go up and the nose of the aircraft will go up.
8. Which of the following is not indicated by the aluminum sheet designation
AL-CLAD 2024-T36?
1) The specific process or combination of operations used to produce
the stable temper.
2) The nominal thickness of the sheet.
3) Major alloying element.
4) Method used to produce stable temper (whether strain hardened
or heat treated).
9. If it is necessary to adjust several valves in a hydraulic system, what particular
sequence, if any, should be followed?
1) Units with the highest pressure settings are adjusted first.
2) Units with the lowest specified pressure settings should be adjusted
first.
3) Units are independent of each other and therefore no particular
sequence is necessary.
4) Units most distant from the hydraulic pump should be adjusted
first.
10. Shuttle valves installed in large aircraft braking systems allow:
1) Two independent systems to operate the same actuator if necessary.
2) The safe application of brakes regardless of ground speed due
to the compensating action of the valves.
3) Fluid to bypass from the right wheel cylinder to the left wheel
cylinder if braking pressures are different.
4) The compensating port, interconnecting both master cylinders,
to discharge fluid alternately from one to the other.
11. Built-in aircraft fire extinguishing systems ordinarily are charged with:
1) Carbon dioxide and nitrogen.
2) Carbon tetrachloride.
3) Sodium bicarbonate.
4) Freon and nitrogen.
12. Instrument static system leakage can be detected by observing the rate of
change in indication of the:
1) Altimeter after pressure has been applied to the static system
to cause a prescribed equivalent altitude to be indicated.
2) Airspeed indicator after pressure has been applied to the static
system to cause a prescribed equivalent airspeed to be indicated.
3) Altimeter after suction has been applied to the static system
to cause a prescribed equivalent altitude to be indicated.
4) Airspeed indicator after suction has been applied to the static
system to cause a prescribed equivalent airspeed to be indicated.
13. What effect wilt increased generator voltage have on the strength of the
electromagnet which controls the pressure applied to the stack of carbon discs in
a carbon pile voltage regulator?
1) Both magnet strength and the pressure applied to the carbon discs
will increase.
2) Both magnet strength and the pressure applied to the carbon discs
will decrease.
3) Magnet strength will decrease and the pressure applied to the
carbon discs will increase.
4) Magnet strength will increase and the pressure applied to the
carbon discs will decrease.
14. What effect will increased humidity have on engine power output?
1) No appreciable change in power output.
2) Power output will decrease at all altitudes.
3) Power output will increase at all altitudes.
4. No effect at sea level but greater power output at altitude.
15. Aircraft engine direct cylinder fuel injection systems normally discharge
fuel into each cylinder during which stroke(s)?
1) Compression.
2) Intake.
3) All (continuously).
4. Intake and compression.
16. When a single-stage, two speed supercharger is shifted from low to high impeller
ratio during a ground check there should be:
1) A momentary drop in oil pressure, no drop in manifold pressure,
and no change in RPM.
2) A momentary drop in oil pressure, a slight rise in manifold pressure,
and an increase in RPM.
3) No drop in oil pressure, no drop in manifold pressure, and an
increase in RPM.
4) No drop in oil pressure, a slight drop in manifold pressure, and
a decrease in RPM.
17. Which statement about the ignition system of a turbojet engine is correct?
1) It is a low voltage, high amperage system.
2) The engine will operate normally after start if the ignition system
is de-energized.
3) The engine will not continue to operate after start if the ignition
system is de-energized.
4) The system generally includes a polar inductor type magneto.
18. Thermocouple type temperature indicating instrument systems:
1) Require no external power source.
2) Are classed as balanced type, variable resistor circuits.
3) Usually contain a balancing circuit in the instrument case to
prevent fluctuations of the aircraft electrical system voltage from affecting the
temperature reading.
4) Will not indicate a true reading if the aircraft electrical system
voltage varies beyond the range for which the instruments are calibrated.
19. Which of the following is referred to as the propeller blade face?
1) The root end of a propeller blade.
2) The flat side of a propeller blade.
3) The cambered side of a propeller blade.
4) The cuff around a propeller blade.
20. Select the proper sequence to be followed when using the etching process
as an inspection method for determining the surface condition of an aluminum alloy
propeller blade.
1) Nitric acid etch, water rinse.
2) Nitric acid etch, caustic bath, water rinse.
3) Abrasive cleaning, nitric acid etch, water rinse, caustic bath,
water rinse.
4. Abrasive cleaning, caustic etch, water rinse, nitric acid bath,
water rinse.
Answers to Sample Written Examination Items
Graphic Here
Posted March 2, 2024
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