Which of these materials is the most cathodic?
2024 aluminum alloy. Zinc. Stainless steel.
After making a certain repair to an aircraft engine that is to be returned to service, an FAA Form 337 is prepared. How many copies are required and what is the disposition of the completed forms?
Two; one copy for the aircraft owner and one copy for the FAA. Three; one copy for the aircraft owner, one copy for the FAA, and one copy for the permanent records of the repairing agency or individual. Two; one copy for the FAA and one copy for the permanent records of the repairing agency or individual.
(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 No. 1 and No. 2 are true. only No. 1 is true. neither No. 1 nor No. 2 is true.
When a discrepancy list is provided to an aircraft owner or operator after an inspection, it says in effect that:
the item inspected is unairworthy. except for these discrepancies, the item inspected is airworthy. the item inspected may or may not be airworthy depending on the discrepancies found.
(Refer to Figure 1 .) When different rated capacitors are connected in series in a circuit, the total capacitance is:
less than the capacitance of the lowest rated capacitor. equal to the sum of all the capacitances. greater than the capacitance of the highest rated capacitor.
When is a mechanic responsible for checking AD compliance?
Never, the owner or operator is solely responsible. When performing an inspection required under part 91, 125, or 135. Anytime an aircraft or portion thereof is returned to service.
Which will weigh the least?
50 parts of dry air and 50 parts of water vapor. 98 parts of dry air and 2 parts of water vapor. 35 parts of dry air and 65 parts of water vapor.
If the empty weight CG of an airplane lies within the empty weight CG limits,
it is not necessary to calculate CG extremes. it is necessary to calculate CG extremes. minimum fuel should be used in both forward and rearward CG checks.
(Refer to Figure 22 .) Which illustration is correct concerning bias application and current (positive charge) flow? 1. 3. 2.
Fretting corrosion is most likely to occur:
only when two dissimilar metals are in contact. when two surfaces fit loosely together and can move relative to one another. when two surfaces fit tightly together but can move relative to one another.
The speed of sound in the atmosphere
changes with a change in pressure. varies according to the frequency of the sound. changes with a change in temperature.
In a P-N-P transistor application, the solid state device is turned on when the
base is positive with respect to the emitter. emitter is negative with respect to the base. base is negative with respect to the emitter.
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?
Ultrasonic inspection. Eddy current inspection. Magnetic particle inspection.
An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?
Resistance and capacitive reactance. Inductance and frequency. Resistance and voltage.
For which of the following reasons would a water break test be conducted?
To make certain that a newly alodized aluminum surface is sufficiently coated. To make certain that a bare metal surface is thoroughly clean. To make certain that an anodizing coating has been sufficiently removed before an electrical bonding connection can be made.
In order to reconstruct lost or destroyed aircraft maintenance records, what is it necessary to establish?
Dates of all maintenance, preventive maintenance, and alterations. Dates and/or times of all 100-hour, annual, or progressive inspections. Total time-in-service of the airframe.
Of the following, when and/or where is galvanic corrosion is most likely to occur?
When an electrolyte (water) covers the surface of an aluminum skin, seeps into the cracks between lap joints, and oxygen is excluded from the area. At the interface of a steel fastener and aluminum alloy inspection plate in the presence of an electrolyte. In an area of unprotected metal exposed to an atmosphere containing battery fumes, exhaust gases, or industrial contaminants.
If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will:
triple. be reduced to one third its original volume. remain the same.
When calculating power in a reactive or inductive ac circuit, the true power is:
more than the apparent power. less than the apparent power. less than the apparent power in a reactive circuit and more than the apparent power in an inductive circuit.
Holes and a few projecting globules are found in a weld. What action should be taken?
Remove all the old weld, and reweld the joint. Grind the rough surface smooth, inspect, and reweld all gaps/holes. Reweld the defective portions.
What type of measurement is used to designate the arm in weight and balance computation?
Distance. Weight. Weight x distance.
When computing the maximum forward loaded CG of an aircraft, minimum weights, arms, and moments should be used for items of useful load that are located aft of the:
rearward CG limit. datum. forward CG limit.
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 aircraft becomes a restricted category type until it is approved for return to service. The aircraft may be flown without restriction up to 10 hours to reach another maintenance base. The owner must obtain a special flight permit.
What tool is generally used to set a divider to an exact dimension?
Surface gauge. Machinist scale. Dial indicator.
A blueprint shows a hole of 0.17187 to be drilled. Which fraction size drill bit is most nearly equal? 11/32. 11/64. 9/32.
An airplane flying a distance of 750 miles used 60 gallons of gasoline. How many gallons will it need to travel 2,500 miles?
200. 31,250. 9,375.
A complete detailed inspection and adjustment of the valve mechanism will be made at the first 25 hours after the engine has been placed in service. Subsequent inspections of the valve mechanism will be made each second 50-hour period.From the above statement, at what intervals will valve mechanism inspections be performed?
50 hours. 125 hours. 100 hours.
Which of the following conditions has the most potential for causing engine damage when starting or attempting to start a turbine engine?
Hung start. Cold start. Hot start.
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?
Ultrasonic inspection. Eddy current inspection. Magnetic particle inspection.
A part which is being prepared for dye penetrant inspection should be cleaned with:
water base solvents only. a volatile petroleum base solvent. the penetrant developer.
(Refer to Figure 38 .) An aircraft reciprocating engine has a 1,830 cubic-inch displacement and develops 1,250 brake-horsepower at 2,500 RPM. What is the brake mean effective pressure?
225 205 217.
(Refer to Figure 7 .) If resistor R3 is disconnected at terminal D, what will the ohmmeter read?
20 ohms. Infinite resistance. 10 ohms.
Which of the listed conditions is NOT one of the requirements for corrosion to occur?
The presence of a passive oxide film. Electrical contact between an anodic area and a cathodic area. The presence of an electrolyte.
When, or under what condition(s) are adverse loading checks conducted?
At or below the maximum gross weight of the aircraft. Anytime a repair or alteration causes EWCG to fall within the EWCG range. At specified flight hour or calendar time intervals.
Which statement is true regarding an orthographic projection?
There are always at least two views. It could have as many as eight views. One view, two view, and three view drawings are the most common.
Fretting corrosion is most likely to occur:
only when two dissimilar metals are in contact. when two surfaces fit loosely together and can move relative to one another. Fretting corrosion is most likely to occur.
(Refer to Figure 4 .) How much power is being furnished to the circuit?
2,645 watts. 575 watts. 2,875 watts.
Which of the following may a certificated airframe and powerplant mechanic perform on aircraft and approve for return to service?
1. a 100-hour inspection.
2. an annual inspection, under specified circumstances.
3. a progressive inspection, under specified circumstances.
1, 2. 1, 2, 3. 1, 3.
Which decimal is most nearly equal to a bend radius of 31/64?
0.4844. 0.2065. .03164.
What FAA-approved document gives the leveling means to be used when weighing an aircraft?
Type Certificate Data Sheet. AC 43.13-1B. Manufacturer's maintenance manual.
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