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General 1
General 2
Airframe 1
Airframe 2
Powerplant
100
What is the basic unit of electrical quantity? A)Electromotive Force. B)Ampere. C)Coulomb.
What is C) Coulomb ****the coulomb is the basic unit of electrical quantity. 1 coulomb is equal to 6.28 X 10^18 electrons.****
100
Which statement is applicable when using a sketch for making a part? A)The sketch may be used only if supplemented with three-view orthographic projection drawings. B)The sketch must show all information to manufacture the part. C)The sketch need not show all necessary construction details.
What is: B)The sketch must show all information to manufacture the part. **** A sketch is a simple, rough drawing made rapidly and without much detail. A sketch is frequently drawn for use in manufacturing a replacement part. Such a sketch must provide all necessary information to those persons who must manufacture the part.
100
The strength classification of fabrics used in aircraft covering is based on A)bearing strength. B)shear strength. C)tensile strength.
What is C)tensile strength.
100
When making repairs to fiberglass, cleaning of the area to be repaired is essential for a good bond. The final cleaning should be made using A) MEK (methyl ethyl ketone). B) soap, water, and a scrub brush. C) a thixotropic agent.
What is A) MEK (methyl ethyl ketone)
100
Some cylinder barrels are hardened by A)nitriding. B)shot peening. C)tempering.
What is A)nitriding. ***The walls of an aircraft-engine cylinder are subjected to a great deal of wear as the iron piston rings rub against them.The walls of some cylinders are treated to increase their hardness and resistance to wear. There are two methods of hardening these surfaces: hard-chrome-plating and nitriding.Nitriding is a process in which the surface of the steel cylinder wall is changed into a hard nitride by an infusion of nitrogen from the ammonia gas used in the nitriding heat treatment process.
200
What happens to the current in a voltage step-up transformer with a ratio of 1 to 4? A)The current is stepped down by a 1 to 4 ratio. B)The current is stepped up by a 1 to 4 ratio. C)The current does not change.
What is: A)The current is stepped down by a 1 to 4 ratio. ****The power (voltage times current) in the secondary of a transformer is equal to the power in the primary. When the voltage in the secondary is four times that in the primary, the current in the secondary is one fourth of that in the primary.****
200
For sketching purposes, almost all objects are composed of one or some combination of six basic shapes; these include the A)angle, arc, line, plane, square and circle. B)triangle, circle, cube, cylinder, cone, and sphere. C)triangle, plane, circle, line, square, and sphere
What is: B)triangle, circle, cube, cylinder, cone, and sphere. **** A schematic diagram shows the relative location of all of the parts in a system, but does not give the location of the parts in the aircraft. Schematic drawings are of great help when troubeshooting a system.
200
What is used to slow the drying time of some finishes and to prevent blush? A)Reducer. B)Retarder. C)Rejuvenator
What is B)Retarder.
200
When necessary, what type of cutting fluid is usually acceptable for machining composite laminates? A) Water soluble oil. B) Water displacing oil. C) Water only.
What is C) Water only. ****An improper cutting fluid used for machining composite materials would contaminate the material and prevent subsequent bonding. For this reason, water is the only fluid normally approved for use in machining composite materials.
200
If the exhaust valve of a four-stroke cycle engine is closed and the intake valve is just closed, the piston is on the A)intake stroke. B)power stroke. C)compression stroke.
What is C)compression stroke. ****The intake valve closes when the piston is moving upward on the compression stroke. At this time, the exhaust valve is already closed.
300
Which of the following statements is/are generally true regarding the charging of several aircraft batteries together?1. Batteries of different voltages (but similar capacities) can be connected in series with each other across the charger, and charged using the constant current method.2. Batteries of different ampere-hour capacity and same voltage can be connected in parallel with each other across the charger, and charged using the constant voltage method.3. Batteries of the same voltage and same ampere-hour capacity must be connected in series with each other across the charger, and charged using the constant current method. A) 3 B) 2 and 3. C)1 and 2.
What is:C)1 and 2. ****Batteries having different voltages, but similar capacity can be connected in series and charged by the constant-current method. Batteries having the same voltage but different ampere-hour capacity can be connected in parallel and charged at the same time, if they are charged by the constant-voltage method****
300
In the process of weighing an airplane toward obtaining the CG, the arms from the weighing points always extend A)parallel to the centerline of the airplane. B)straight forward from each of the landing gear. C)directly from each weighing point to the others.
What is:A)parallel to the centerline of the airplane. **** an arm, used in determining the CG of an airplane, is the horizontal distance from the datum to the center of gravity of the item. Arms are always measured parallel to the centerline of the airplane.
300
What is likely to occur if hydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when the humidity is low? A)Corrosion. B)A glossy, blush-free finish. C)A dull finish due to the topcoat 'sinking in' to primer that is still too soft.
What is B)A glossy, blush-free finish.
300
iberglass laminate damage that extends completely through one facing and into the core A)cannot be repaired. B)requires the replacement of the damaged core and facing. C)can be repaired by using a typical metal facing patch.
What is B)requires the replacement of the damaged core and facing.
300
After spark plugs from an opposed engine have been serviced, in what position should they be reinstalled? A)Next in firing order to the one from which they were removed. B)Swapped bottom to top. C)Next in firing order to the one from which they were removed and swapped bottom to top.
What is C)Next in firing order to the one from which they were removed and swapped bottom to top. ****When spark plugs have been cleaned, gapped and tested, they should be installed in the cylinder next in firing order to the one from which they were removed, and they should be swapped from bottom to top.
400
In nickel-cadmium batteries, a rise in cell temperature A)causes an increase in internal resistance. B)causes a decrease in internal resistance. C)increases cell voltage.
What is:B)causes a decrease in internal resistance. **** One of the desirable features of a nickel-cadmium battery is its low internal resistance which gives it the ability to discharge at a high rate and to accept a high rate of charge. The voltage and internal resistance of a nickel-cadmium cell vary inversely as the temperature. When the cell temperature increases, the voltage and internal resistance both decrease. This allows the battery to accept an excessive amount of charging current which produces more heat and can cause a thermal runaway.
400
Use of which of the following generally yields the highest degree of aircraft leveling accuracy? A)Plumb bob and chalk line. B)Spirit level(s). C)Electronic load cell(s).
What is:B)Spirit level(s). **** The leveling means for determining weight and balance is specified by the aircraft manufacturer and is listed in the Type Certificate Data Sheets. Proper level may be determined with spirit levels placed across leveling lugs or along the door sill.
400
The length of time that a catalyzed resin will remain in a workable state is called the A)pot life. B)shelf life. C)service life.
What is A)pot life.
400
Repairs or splices involving stringers on the lower surface of stressed skin metal wings are usually A)not permitted. B)permitted only if the damage does not exceed 6 inches in any direction. C)permitted but are normally more critical in reference to strength in tension than similar repairs to the upper surface.
What is C)permitted but are normally more critical in reference to strength in tension than similar repairs to the upper surface.
400
Excessive valve clearance results in the valves opening A)late and closing early. B)early and closing late. C)late and closing late.
What is A)late and closing early. ****Excessive clearance in the valve train will cause the valves to open late (the cam will have to turn farther before the valve is opened) and close early (the valve will close before the cam rotates to the normal closing position).
500
A line used to show an edge which is not visible is a B) hidden line. C) break line.
What is: A) phantom line. **** A phantom line is a light line made up of an alternate long dash and two short dashes. A phantom line shows the location of a part that is used as a reference. A hidden line is a medium-weight, dashed line that shows a surface or a part that is not visible from the view in which it appears. A break line is a wavy or a zigzag line used to show that a part has been broken off and only part of it is shown.
500
The term 'cold flow' is generally associated with A)the effects of low temperature gasses or liquids flowing in hose or tubing. B) impressions left in natural or synthetic rubber hose material. C) flexibility characteristics of various hose materials at low ambient temperatures.
What is:B) impressions left in natural or synthetic rubber hose material.
500
Composite fabric material is considered to be the strongest in what direction? A)Fill. B)Warp. C)Bias.
What is B)Warp. ****The threads that run the length of a piece of fabric are called the warp threads and they are generally stronger than the woof, weft, or fill threads that run across the material. For this reason, a piece of composite fabric is strongest in its warp direction.
500
Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally A)repairable, using approved methods. B)repairable, except when subjected to compressive loads. C)not repairable, but must be replaced when damaged or deteriorated.
What is A) repairable, using approved methods.
500
Engine operating flexibility is the ability of the engine to A)deliver maximum horsepower at a specific altitude. B)meet exacting requirements of efficiency and low weight per horsepower ratio. C)run smoothly and give the desired performance at all speeds.
What is C)run smoothly and give the desired performance at all speeds.