What precision measuring tool is used for measuring crankpin and main bearing journals for out of round wear?
Depth gauge. Micrometer caliper. Dial gauge.
If both the volume and the absolute temperature of a confined gas are doubled, the pressure will:
become four times as great. be halved. not change.
In the reading of aircraft blueprints, the term tolerance, used in association with aircraft parts or components,
is the difference between extreme permissible dimensions that a part may have and still be acceptable. represents the limit of galvanic compatibility between different adjoining material types in aircraft parts. is the tightest permissible fit for proper construction and operation of mating parts.
Select the solvent used to clean acrylics and rubber.
Aliphatic naphtha. Methyl ethyl ketone. Aromatic naphtha.
A thermal switch, as used in an electric motor, is designed to:
close the integral fan circuit to allow cooling of the motor. open the circuit in order to allow cooling of the motor. reroute the circuit to ground.
What may be used to check the stem on a poppet-type valve for stretch?
Telescoping gauge. Dial indicator. Micrometer .
When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to:
reveal all possible defects. ensure uniform current flow. evenly magnetize the entire part.
Which regulation provides information regarding instrument range markings for an airplane certificated in the normal category?
14 CFR Part 25. 14 CFR Part 21. 14 CFR Part 23.
A rectangular shaped fuel tank measures 37-1/2 inches in length, 14 inches in width, and 8-1/4 inches in depth. How many cubic inches are within the tank?
525. 4,331.25. 433.125.
A pinion gear with 14 teeth is driving a spur gear with 42 teeth at 140 RPM. Determine the speed of the pinion gear.
126 RPM. 588 RPM. 420 RPM.
The maximum weight of an aircraft is the:
empty weight plus crew, maximum fuel, cargo, and baggage. empty weight plus useful load. empty weight plus crew, passengers, and fixed equipment.
Which requires the most electrical power? (Note: 1 horsepower = 746 watts).
A 24-volt anticollision light circuit consisting of two light assemblies which require 3 amperes each during operation. Four 30-watt lamps arranged in a 12-volt parallel circuit. A 1/5-horsepower, 24-volt motor which is 75 percent efficient.
Which statement is applicable when using a sketch for making a part?
The sketch must show all information to manufacture the part. The sketch may be used only if supplemented with three view orthographic projection drawings. The sketch need not show all necessary construction details.
General Aviation Airworthiness Alerts:
provide information about aircraft problems and suggested corrective actions. provide temporary emergency procedures until Airworthiness Directives can be issued. provide mandatory procedures to prevent or correct serious aircraft problems.
(1) A measurement should not be scaled from an aircraft print because the paper shrinks or stretches when the print is made.(2) When a detail drawing is made, it is carefully and accurately drawn to scale, and is dimensioned.Regarding the above statements,
only No. 2 is true. neither No. 1 nor No. 2 is true. both No. 1 and No. 2 are true.
(Refer to Figure 26 .) Which of the logic gate output conditions is correct with respect to the given inputs?
2. 3. 1.
Weathervaning tendency is greatest when taxiing:
a tailwheel-type airplane in a direct crosswind. a nosewheel-type airplane in a quartering headwind. either type of airplane in a quartering tailwind.
Which decimal is most nearly equal to a bend radius of 31/64?
0.4844. 0.2065. .03164.
The desired effect of using winglets on an aircraft's wingtips is to:
increase the lift to drag ratio. reduce the aspect ratio. optimize wing dihedral and improve lateral stability.
One way of obtaining increased resistance to stress corrosion cracking is by:
producing nonuniform deformation while cold working during the manufacturing process. creating compressive stresses (via shot peening) on the metal surface. relieving compressive stresses (via heat treatment) on the metal surface.
Where should you find this entry? ''Removed right wing from aircraft and removed skin from outer 6 feet. Repaired buckled spar 49 inches from tip in accordance with Figure 8 in the manufacturer's structural repair manual No. 28-1.''
Aircraft engine maintenance record. FAA Form 337. Aircraft minor repair and alteration record.
The main differences between grades 100 and 100LL fuel are:
lead content and color. volatility and lead content. volatility, lead content, and color.
(1) Propellers are NOT included in the Airworthiness Directive system.(2) A certificated powerplant mechanic may make a minor repair on an aluminum propeller and approve for return to service.Regarding the above statements,
only No. 2 is true. both No. 1 and No. 2 are true. neither No. 1 nor No. 2 is true.
Which heat treating process of metal produces a hard, wear resistant surface over a strong, tough core?
Case hardening. Tempering. Annealing.
How may magnesium engine parts be cleaned?
Spray with MEK (methyl ethyl ketone). Wash with a commercial solvent, decarbonize, and scrape or grit blast. Soak in a 20 percent caustic soda solution.
What is the color of an AN steel flared tube fitting?
Blue. Black. Red.
If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a:
0 to 1 inch inside micrometer and read the measurement directly from the micrometer. telescoping gauge and determine the size of the hole by taking a micrometer reading of the adjustable end of the telescoping gauge. small hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.
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 45°. Dented section removed and replaced with identical new tubing flared to 37°. Dent within acceptable limits, repair not necessary.
In a metal tubing installation,
a tube may be pulled in line if the nut will start on the threaded coupling. rigid straight line runs are preferable. tension is undesirable because pressurization will cause it to expand and shift.
The potential difference between two conductors which are insulated from each other is measured in:
volts. coulombs. amperes.
(Refer to Figure 41 .) Determine how much fuel would be required for a 30-minute reserve operating at 2,300 RPM.
49.8 pounds. 25.3 pounds. 35.5 pounds.
Scratches or nicks on the straight portion of aluminum alloy tubing may be repaired if they are no deeper than:
1/32 inch or 20 percent of wall thickness, whichever is less. 20 percent of the wall thickness. 10 percent of the wall thickness.
Which of the following is NOT considered a method of heat transfer?
Conduction. Convection. Diffusion.
Spilled mercury on aluminum:
causes rapid and severe corrosion that is very difficult to control. may cause impaired corrosion resistance if left in prolonged contact. increase susceptibility to hydrogen embrittlement.
(Refer to Figure 16 .) With power to the bus and the fuel selector switched to the right hand tank, how many relays in the system are operating?
Two. Four. Three.
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?
15.0. 12.5. 21.0.
The total piston displacement of a specific engine is:
dependent on the compression ratio. the volume displaced by all the pistons during one revolution of the crankshaft. the total volume of all the cylinders.
Certificated mechanics, under their general certificate privileges, may:
perform 100-hour inspection of instruments. perform minor alterations to instruments. perform minor repairs to instruments.
When stopping a nosewheel-type airplane after taxiing, the nosewheel should be left:
pointed straight ahead. unlocked and pointed straight ahead. turned at a small angle towards uphill if the parking area is not perfectly flat.
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. Ultrasonic inspection. Magnetic particle inspection.
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