general written test questions Flashcards
what. size sheet of metal is required to fabricate a cylinder 20 inches. long and 8 inches in diameter?
(note:c=pi x D )
20 inches X 24-9/64 inches
(8348) how many magnesium engine parts be cleaned?
wash with a commercial solvent decarbonize, and scrape or grit blast.
what dose the latter Q symbolize when measuring electrical charge?
coulomb
which of the following materials may be in using the magnetic particle inspection method?
Iron alloys.
The useful load of an aircraft is. the difference between?
the maximum take wight and basic empty weight.
which statement concerning heat and or temperature is true?
Temperature is measure of the kinetic energy of the molecules of any substance.
which tool is used to measure the clearance between a surface being checked for flatness?
thickness gage
Which of the following is not considered a method of heat transfer?
Diffusion
The term. cold flow is generally rally associated?
Impression left in natural or synthetic rubber hose material.
If registration numbers are to be applied to and aircraft with a letter height of 12 inches, what is the minimum space required for the registration mark N1683C?
52 inches
when a teflon house has been in service for time what condition may have occurred and /or what it is temporarily removed from the aircraft?
The hose may have developed a set or have been manufactured with a pre -set. shape, and must be. supported to maintain its shape.
the radius of a piece of round stock is 7/32. select the. decimal which is most nearly equal to the diameter?
0.4375
capacitors are sometime used in DC. circuits to ?
smooth out. slight pulsations in current / voltage.
According to DR. James reason there are two types human failure which can occur. they are :
Active and latent
(8071) (Refer to Figure 19.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire
6.
(8609) When humidity is low, what is likely to occur if hydrated wash primer is applied to unpainted aluminum and then, 30 to 40 minutes later, a finish top coat is applied?
A glossy, blush-free finish.
(8068) (Refer to Figure 18.) The control valve switch must be placed in the neutral position when the landing gear is down to
prevent the warning horn from sounding when the throttles are closed.
(8452) Which maintenance record entry best describes the action taken for a .125-inch deep dent in a straight section of 1/2-inch aluminum alloy tubing?
Dented section removed and replaced with identical new tubing flared to 37°.
What may be used to check the stem on a poppet-type valve for stretch?
Micrometer
(8463) After a mechanic holding an airframe and powerplant rating completes a 100-hour inspection, what action is required before the aircraft is returned to service?
Make the proper entries in the aircraft’s maintenance record.
(8441) Solve the equation.
(-3 + 2)(-12 - 4) + (-4 + 6) x 3
22
(8451) Which maintenance record entry best describes the action taken for a control cable showing approximately 20 percent wear on several of the individual outer wires at a fairlead?
Wear within acceptable limits, repair not necessary.
(8486) 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.
(8191.2) If an aircraft CG is found to be at 24 percent of MAC, that 24 percent is an expression of the
distance from the LEMAC.
What is the usual cause of runs and sags in aircraft finishes?
Too much material applied in one coat.
Aspect ratio of a wing is defined as the
ratio of the
wingspan to the mean chord.
(8332) When taxiing (or towing) an aircraft, an alternating red and green light from the control tower means
OK to proceed but use extreme caution.
The result of 7 raised to the third power plus the square root of 39 is equal to
349.24
(8309) A hung start in a jet engine is often
caused by
the starter cutting off too soon.
If the fluid pressure is 800 PSI
in a 1/2-inch line supplying an actuating cylinder with a piston area of 10 square inches, the force exerted on the piston will be
8,000 pounds.
For sketching purposes, almost all objects are composed of one or some combination of six basic shapes; these include the
triangle, circle, cube, cylinder, cone, and sphere.
What is the speed ratio of an input gear with 36 teeth meshed to a gear with 20 teeth?
1:1.8
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.
Which statement relating to the residual magnetizing inspection method is true?
It may be used with steels which have been heat treated for stressed applications.
The SHEL model is another human factors tool. The goal is to determine not only what the problem is, but also
where and why it exists.
Why is it considered good practice to normalize a part after welding?
To relieve internal stresses developed within the base metal.
The potential difference between two conductors which are insulated from each other is measured in?
volts.
(Refer to Figure 40.) Determine the proper tension for a 1/8-inch cable (7 x 19) if the temperature is 80°F.
70 pounds.
What is the class of working drawing that is the description/depiction of a single part?
Detail drawing.
A blueprint shows a hole of 0.17187 to be drilled. Which fraction size drill bit is most nearly equal?
11/64
(8184) Datum is forward of the
main gear
center point
30.24 inches
Actual distance between tail gear
and main gear center points
360.26 inches
Net weight at right main gear
9,980
pounds
Net weight at left main gear
9,770 pounds
Net weight at tail gear
1,970 pounds
These items were in the aircraft when weighed:
1. Lavatory water tank full (34 pounds at +352).
2. Hydraulic fluid (22 pounds at -8).
3. Removable ballast (146 pounds at +380) *
What is the empty weight CG of the aircraft described above?
60.31 inches.
What tasks are completed prior to weighing an aircraft to determine its empty weight?
Remove all items except those on the aircraft equipment list; drain fuel and fill hydraulic reservoir.
Characteristics of detonation are
rapid rise in cylinder pressure, excessive cylinder head temperature, and a decrease in engine power.
If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?
Apply sodium bicarbonate solution to the affected area followed by a water rinse.
In examining and evaluating a welded joint, a mechanic should be familiar with
likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition.
When referencing resistance in a parallel DC circuit, which of the following statements is true?
The total current is equal to the sum of the currents through the individual branches of the circuit.
How much work input is required to lower (not drop) a 120-pound weight from the top of a 3-foot table to the floor?
360 foot-pounds.
(Refer to Figure 39.) Determine the maximum length of a No. 16 cable to be installed from a bus to the equipment in a 28-volt system with a 25-ampere intermittent load and a 1-volt drop.
8 feet.
If the empty weight CG of an airplane lies within the empty weight CG limits,
it is not necessary to calculate ce extremes.
(8304) 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.
A gas or fluid line marked with the letters PHDAN is
used to carry a hazardous substance.
The positive aspects of human factor issues are referred to as the
Magnificent Seven.
(8121.1) What is used to indicate that a surface must be machine finished?
Finished marks.
(8096) The electrolyte of a nickel-cadmium battery is the lowest when the battery is
in a discharged condition.
(8194) From the following sequences of steps, indicate the proper order you would use to make a single flare on a
piece of tubing:
1. Place the tube in the proper size hole in the flaring block.
2. Project the end of the tube slightly from the top of the flaring tool, about the thickness of a dime.
3. Slip the fitting nut and sleeve on the tube.
4. Strike the plunger several light blows with a lightweight hammer or mallet and turn the plunger one-half turn after each blow.
5. Tighten the clamp bar securely to prevent slippage.
6. Center the plunger or flaring pin over the tube.
3, 1, 6, 2, 5, and 4.
(8014) What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 microfarad, *03 microfarad, and .12 microfarad, respectively?
(Note: C(T) = C(1) + C(2) + C(3))
.4 UF.
(8462) An FAA Form 337 is used to record and document
major repairs and major alterations.
FAA certificated mechanics may
approve for return to service a minor alteration they have performed appropriate to the rating(s) they hold.
