A&P GENERAL-3

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?. 62.92 inches. 58.54 inches. 60.31 inches.

A primary reason why ordinary or otherwise nonapproved cleaning compounds should not be used when washing aircraft is because their use can result in. hydrogen embrittlement in nonmetallic materials. hydrogen embrittlement in metal structures. a general inability to remove compound residues.

Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is. upward, or in a forward direction. downward, or in a forward direction. upward, or in rearward direction.

The opposition offered by a coil to the flow of alternating current is called (disregard resistance). reluctance. impedance. inductive reactance.

(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. No. 7. No. 6. No. 5.

What should be the first step of the procedure in sketching an aircraft wing skin repair?. Lay out the repair. Block in the views. Draw heavy guidelines.

The CG range in single-rotor helicopters is. much greater than for airplanes. more restricted than for airplanes. approximately the same as the CG range for airplanes.

(Refer to Figure 64.) 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?. 4 ohms. 12 ohms. 36 ohms.

What is the color of an AN steel flared-tube fitting?. Black. Red. Blue.

FAA certificated mechanics may. supervise and approve a 100-hour inspection. approve for return to service a major repair for which they are rated. approve for return to service a minor alteration they have performed appropriate to the rating(s) they hold.

When installing a castle nut, and the nut castellation does not align with the cotter pin hole in the bolt within the torque range, the acceptable practice is to. back the nut off and align it to the nearest hole. continue tightening the nut to the next hole. change the nut or washer and try again.

Which of the following defects are not acceptable for metal lines? 1) Cracked flare 2) Seams 3) Dents in the heel of a bend less than 20% of the diameter 4) Scratches/nicks on the inside of a bend less than 10% of wall thickness 5) Dents in straight section that are 20% of tube diameter. 1, 2, 3, 4, and 5. 1, 2, 3, and 5. 1, 2, and 3.

A circuit has an applied voltage of 30 volts and a load consisting of a 10-ohm resistor in series with a 20-ohm resistor. What is the voltage drop across the 10-ohm resistor?. 10 volts. 30 volts. 20 volts.

Why is it considered good practice to normalize a part after welding?. To increase the hardness of the weld. To relieve internal stresses developed within the base metal. To remove the surface scale formed during welding.

How long does the holder of a certificate issued under 14 CFR part 65 have to notify the FAA after any change in permanent mailing address?. 60 days. 30 days. 90 days.

How is the locking feature of the fiber-type locknut obtained?. By making the threads in the fiber insert slightly smaller than those in the load carrying section. By a fiber insert held firmly in place at the base of the load carrying section. By the use of an unthreaded fiber locking insert.

The boiling point of a given liquid varies. directly with pressure. directly with density. inversely with pressure.

Circular magnetization of a part can be used to detect which defects?. Defects perpendicular to the concentric circles of magnetic force within the part. Defects perpendicular to the long axis of the part. Defects parallel to the long axis of the part.

Convert 7 to binary form. 0011. 0111. 1110.

The following words are an example of what kind of statement in an AD? 'Required within the next 25 hours time-in-service after the effective date of this AD, unless already accomplished.'. Applicability. Amendment. Compliance.

To detect a minute crack using dye penetrant inspection usually requires. the surface to be highly polished. a longer-than-normal penetrating time. that the developer be applied to a flat surface.

What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?. Depth gauge. Dial gauge. Micrometer caliper.

Which requires the most electrical power during operation? (Note: 1 horsepower = 746 watts). Four 30-watt lamps in a 12-volt parallel circuit. Two lights requiring 3 amperes each in a 24-volt parallel system. A 12-volt motor requiring 8 amperes.

A certain amount of slack must be left in a flexible hose during installation because, when under pressure, it. expands in length and contracts in diameter. contracts in length and expands in diameter. expands in length and diameter.

(Refer to Figure 47.) What is the measurement reading on the vernier caliper scale?. 1.411 inches. 1.436 inches. 1.700 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 hydraulic fluid. Remove all items on the aircraft equipment list; drain fuel, compute oil and hydraulic fluid weight. Remove all items except those on the aircraft equipment list; drain fuel and fill hydraulic reservoir.

Working drawings may be divided into three classes. They are: detail drawings, assembly drawings, and installation drawings. detail drawings, orthographic projection drawings, and pictorial drawings. title drawings, installation drawings, and assembly drawings.

How are aviation fuels, which possess greater antiknock qualities than 100 octane, classified?. According to the milliliters of lead. By performance numbers. By reference to normal heptane.

The temperature to which humid air must be cooled at constant pressure to become saturated is called. absolute humidity. relative humidity. dewpoint.

What metal has special short-time heat properties and is used in the construction of aircraft firewalls?. Titanium alloy. Stainless steel. Chrome molybdenum alloy steel.

For aircraft operated under part 91, when is aircraft total time required to be recorded in aircraft maintenance records?. After satisfactorily completing maintenance, preventive maintenance, rebuilding, and alteration (excluding inspections). After satisfactorily completing airframe, component, or propeller maintenance. After satisfactorily completing inspections.

What determines whether the value of a moment is preceded by a plus (+) or a minus (-) sign in aircraft weight and balance?. The result of a weight being added or removed and its location relative to the datum. The location of the datum in reference to the aircraft CG. The location of the weight in reference to the datum.

(Refer to Figure 6.) If resistor R(5) is disconnected at the junction of R(4) and R(3) as shown, what will the ohmmeter read?. 2.76 ohms. 12 ohms. 3 ohms.

Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?. Low temperature with low humidity. High temperature with high humidity. High temperature with low humidity.

The Society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number '4130' designating chromium molybdenum steel, the first digit indicates the. percentage of carbon in the alloy in hundredths of a percent. percentage of the basic element in the alloy. basic alloying element.

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 of the aircraft for return to service. Verification that the maintenance or alterations were performed referencing approved maintenance data. Approval for return to service only for the work performed.

Suitability for use of a specific propeller with a particular engine-airplane combination can be determined by reference to what informational source?. Propeller Specifications or Propeller Type Certificate Data Sheet. Aircraft Specifications or Aircraft Type Certificate Data Sheet. Alphabetical Index of Current Propeller Type Certificate Data Sheets, Specifications, and Listings.

Self-locking nuts may be used on aircraft provided that. the bolt or nut are not subject to rotation. the bolt and nut are safety wired. the bolt and nut is not under tension.

(Refer to Figure 62, 62A, & 62B as necessary.) How many parts will need to be fabricated by the mechanic in the construction and installation of one doubler?. 3. 2. 4.

(1) Private aircraft are required by regulations to be weighed periodically. (2) Private aircraft are required to be weighed after making any alteration. Regarding the above statements,. neither No. 1 nor No. 2 is true. only No. 1 is true. only No. 2 is true.

Tetraethyl lead is added to aviation gasoline to: Retard the formation of corrosives. Improve the gasoline's performance in the engine. Dissolve the moisture in the gasoline.

A rectangular shaped fuel tank measures 27-1/2 inches in length, 3/4 foot in width, and 8-1/4 inches in depth. How many gallons will the tank contain? (231 cu in = 1 gal). 8.83. 170.156. 7.366.

The total piston displacement of a specific engine is. the volume displaced by all the pistons during one revolution of the crankshaft. the total volume of all the cylinders. dependent on the compression ratio.

Why is ethylene dibromide added to aviation gasoline?. To scavenge lead oxide from the cylinder combustion chambers. To increase the antiknock rating of the fuel. To remove zinc silicate deposits from the spark plugs.

(Refer to Figure 68.) Which results in the largest number?. 3. 2. 1.

Normalizing is a process of heat treating. both aluminum alloys and iron-base metals. aluminum alloys only. iron-base metals only.

(Refer to Figure 16.) When electrical power is applied to the bus, which relays are energized?. TCC and TCO. PCO and PCC. PCC and TCC.

What may be used to check the stem on a poppet-type valve for stretch?. Telescoping gauge. Micrometer. Dial indicator.

When inductors are connected in series in a circuit, the total inductance is (where the magnetic fields of each inductor do not affect the others) (Note: L(T) = L(1) + L(2) + L(3) . . .). less than the inductance of the lowest rated inductor. equal to the inductance of the highest rated inductor. equal to the sum of the individual inductances.

(Refer to Figure 49.) The measurement reading on the micrometer is. .2758. .2702. .2792.

What is the speed of a spur gear with 42 teeth driven by a pinion gear with 14 teeth turning 420 RPM?. 160 RPM. 140 RPM. 588 RPM.

A bolt with a single raised dash on the head is classified as an. NAS close tolerance bolt. NAS standard aircraft bolt. AN corrosion-resistant steel bolt.

If dye penetrant inspection indications are not sharp and clear, the most probable cause is that the part. has no appreciable damage. was not correctly degaussed before the developer was applied. was not thoroughly washed before the developer was applied.

(Refer to Figure 21.) Which symbol represents a variable resistor?. 3. 2. 1.

(Refer to Figure 50.) Identify the signal to engage rotor on a rotorcraft. 3. 2. 1.

(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?. 217. 225. 205.

(Refer to Figure 41.) Determine the fuel consumption with the engine operating at cruise, 2,350 RPM. 49.2 pounds per hour. 51.2 pounds per hour. 55.3 pounds per hour.

Find the square root of 1,746. 41.7752. 40.7742. 41.7852.

A primary cause of intergranular corrosion is. improper application of primer. improper heat treatment. dissimilar metal contact.

(Refer to Figure 31.) What are the proper procedural steps for sketching repairs and alterations?. 3,1,4,2. 1,3,4,2. 4,2,3,1.

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?. Aviation Maintenance Alerts. Aviation Safety Data. Airworthiness Directives.

Why is it important not to rotate the crankshaft after the corrosion preventive mixture has been put into the cylinders on engines prepared for storage?. Fuel may be drawn into one or more cylinders and dilute or wash off the corrosion preventive mixture. Engine damage can occur from hydraulic lock. The seal of corrosion preventive mixture will be broken.

(Refer to Figure 15.) With the landing gear retracted, the red indicator light will not come on if an open occurs in wire. No. 17. No. 19. No. 7.

Which term means .001 ampere?. Milliampere. Kiloampere. Microampere.

Which of the following can provide the empty weight of an aircraft if the aircraft's weight and balance records become lost, destroyed, or otherwise inaccurate?. Reweighing the aircraft. The applicable flight manual or pilot's operating handbook. The applicable Aircraft Specification or Type Certificate Data Sheet.

(Refer to Figure 43.) Identify the clevis bolt illustrated. 3. 2. 1.

(1) Manufacturer's data and FAA publications such as Airworthiness Directives, Type Certificate Data Sheets, and advisory circulars are all approved data. (2) FAA publications such as Technical Standard Orders, Airworthiness Directives, Type Certificate Data Sheets, and Aircraft Specifications and Supplemental Type Certificates are all approved data. Regarding the above statements: Only No. 2 is true. Both No. 1 and No. 2 are true. Only No. 1 is true.

Which statement is correct when made in reference to a parallel circuit?. The total current is equal to the sum of the currents through the individual branches of the circuit. The current is equal in all portions of the circuit. The current in amperes can be found by dividing the EMF in volts by the sum of the resistors in ohms.

(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,. only No. 2 is true. only No. 1 is true. both No. 1 and No. 2 are true.

Aircraft bolts are usually manufactured with a. class 3 fit for the threads. class 2 fit for the threads. class 1 fit for the threads.

Select the solvent used to clean acrylics and rubber. Methyl ethyl ketone. Aliphatic naphtha. Aromatic naphtha.

Solve the equation. [(4 x -3)+(-9 x 2)] ÷ 2 =. -5. -30. -15.

Technical information about older aircraft models, of which no more than 50 remain in service, can be found in the: Index of Antique Aircraft. Aircraft Listing. Summary of Deleted and Discontinued Aircraft Specifications.

How much power must a 24-volt generator furnish to a system which contains the following loads? UNIT RATING One motor (75 percent efficient) 1/5 hp Three position lights 20 watts each One heating element 5 amp One anticollision light 3 amp (Note: 1 horsepower = 746 watts). 450 watts. 385 watts. 402 watts.

What FAA-approved document gives the leveling means to be used when weighing an aircraft?. Manufacturer's maintenance manual. AC 43.13-1B. Type Certificate Data Sheet.

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?. Defects perpendicular to the long axis of the part. Defects parallel to the long axis of the part. Defects parallel to the concentric circles of magnetic force within the part.

Holes and a few projecting globules are found in a weld. What action should be taken?. Grind the rough surface smooth, inspect, and reweld all gaps/holes. Remove all the old weld, and reweld the joint. Reweld the defective portions.

What is the surface area of a cube where a side (edge) measures 7.25 inches?. 52.5625 sq. in. 381.078 cu. in. 315.375 sq. in.

Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by. providing bends in the tubing. using short, straight sections of tubing between fixed parts of the aircraft. using tubing of the same material as the majority of the adjoining structure.

Who is responsible for upkeep of the required maintenance records for an aircraft?. The maintaining repair station or authorized inspector. The aircraft owner. The maintaining certificated mechanic.

(Refer to Figure 46.) The measurement reading on the illustrated micrometer is. 0.2911. 0.2901. 0.2851.

What type of drawing line consists of alternating long and short lines?. Dimension. Center. Hidden.

The color of 100LL fuel is. Red. Colorless or straw. Blue.

Two boxes which weigh 10 pounds and 5 pounds are placed in an airplane so that their distance aft from the CG are 4 feet and 2 feet respectively. How far forward of the CG should a third box, weighing 20 pounds, be placed so that the CG will not be changed?. 2.5 feet. 3 feet. 8 feet.

If a 40-pound generator applies +1400 inch-pounds to a reference axis, the generator is located. +25 from the axis. +35 from the axis. -35 from the axis.

An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?. Inductance and frequency. Resistance and capacitive reactance. Resistance and voltage.

The term 'cold flow' is generally associated with. impressions left in natural or synthetic rubber hose material. the effects of low temperature gasses or liquids flowing in hose or tubing. flexibility characteristics of various hose materials at low ambient temperatures.

Which of the following are acceptable to use in cleaning anodized surfaces? 1) Steel wool. 2) Brass wire brush. 3) Aluminum wool. 4) Stainless steel wire brush. 5) Fiber bristle brush. 3 & 5. 2 & 4. 1, 3, & 5.

Solve the equation. 1/2 (-30 + 34) 5. 10. 95. 160.

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. triangle, plane, circle, line, square, and sphere. angle, arc, line, plane, square and circle.

In what type of electrical diagram are images of components used instead of conventional electrical symbols?. A pictorial diagram. A schematic diagram. A block diagram.

The end-of-charge voltage of a 19-cell nickel-cadmium battery, measured while still on charge,. must be 1.4 volts per cell. must be 1.2 to 1.3 volts per cell. depends upon its temperature and the method used for charging.

In the four-digit aluminum index system number 2024, the first digit indicates. the major alloying element. the percent of alloying metal added. the number of major alloying elements used in the metal.

(Refer to Figure 16.) The TCO relay will operate if 24-volts dc is applied to the bus and the fuel tank selector is in the. left-hand tank position. right-hand tank position. crossfeed position.

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?. Inductance. Residual. Continuous.

Which condition indicates a part has cooled too quickly after being welded?. Discoloration of the base metal. Gas pockets, porosity, and slag inclusions. Cracking adjacent to the weld.

Which of these publications contains standards for protrusion of bolts, studs, and screws through self-locking nuts?. AC 43.13-1B. AC 43.13-2. Aircraft Specifications or Type Certificate Data Sheets.

Which will weigh the least?. 98 parts of dry air and 2 parts of water vapor. 35 parts of dry air and 65 parts of water vapor. 50 parts of dry air and 50 parts of water vapor.

(Refer to Figure 29.) Identify the left side view of the object shown. 1. 2. 3.

(1) According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records. (2) On occasion, a mechanic may need to make a simple sketch of a proposed repair to an aircraft, a new design, or a modification. Regarding the above statements,. both No. 1 and No. 2 are true. only No. 1 is true. only No. 2 is true.

(Refer to Figure 16.) What will be the effect if the PCO relay fails to operate when the left-hand tank is selected?. The fuel pressure crossfeed valve open light will not illuminate. The fuel pressure crossfeed valve will not open. The fuel tank crossfeed valve open light will illuminate.

Use of which of the following generally yields the highest degree of aircraft leveling accuracy?. Electronic load cell(s). Spirit level(s). Plumb bob and chalk line.

(Refer to Figure 5.) What is the impedance of an ac-series circuit consisting of an inductor with a reactance of 10 ohms, a capacitor with a reactance of 4 ohms, and a resistor with a resistance of 8 ohms?. 5.29 ohms. 10 ohms. 22 ohms.

Which statement is true regarding helicopter weight and balance?. Regardless of internal or external loading, lateral axis cg control is ordinarily not a factor in maintaining helicopter weight and balance. Weight and balance procedures for airplanes generally also apply to helicopters. The moment of tail-mounted components is subject to constant change.

1.21875 is equal to. 19/16. 39/32. 83/64.

(Refer to Figure 38.) An aircraft reciprocating engine has a 2,800 cubic-inch displacement, develops 2,000 brake-horsepower, and indicates 270 brake mean effective pressure. What is the engine speed (RPM)?. 2.300. 2.100. 2.200.

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?. 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 aircraft owner and one copy for the FAA. Two; one copy for the FAA and one copy for the permanent records of the repairing agency or individual.

Jet fuel number identifiers are: Performance numbers and are relative to the fuel's performance in the aircraft engine. Performance numbers to designate the volatility of the fuel. Type numbers and have no relation to the fuel's performance in the aircraft engine.

(Refer to Figure 40.) Determine the proper tension for a 3/16-inch cable (7 x 19 extra flex) if the temperature is 87°F. 140 pounds. 135 pounds. 125 pounds.

Solve the equation. (-3 + 2)(-12 - 4) + (-4 + 6) x 3. 20. 28. 22.