o and p General

What is meant by inductance? (AM.I.A.K4)

The ability to store electrical energy in electromagnetic fields.

What is the basic unit of inductance? (AM.I.A.K4)

Henry

Given the inductance and the frequency of the AC in a circuit, how do you compute the inductive reactance caused by the coil? (AM.I.A.K4)

XL = 2πfL Where: XL = inductive reactance in ohms f = frequency in cycles per second π = 3.1416 L = inductance For example, in an AC series circuit in which the inductance is 146 mH (millihenry) and the voltage is 110 volts at a frequency of 60 cps, the inductive reactance is determined by the following method: XL = 2π x f x L XL = 6.28 x 60 x 0.146 XL = 55 ohm

How many views can there be on an orthographic projection? (AM.I.B.K1)

six

How much current flows through each of three equal resistors connected in parallel if the total current is 3 amps? (AM.I.A.K14)

1 Amp

What is the function of a current limiter? (AM.I.A.K19)

A current limiter is a type of heavy-duty fuse, commonly with ratings of 30 amps or greater. They are often used to protect a section of an electrical system, such as a single electrical bus.

How many views are used to show most objects in an aircraft drawing? (AM.I.B.K1)

three

What information is given in the title block of an aircraft drawing? (AM.I.B.K1)

The name and address of the company who made the part, the name of the part, the scale of the drawing, the name of the draftsman, the name of the engineer approving the part, and the number of the part (the drawing number).

Where is the title block normally located on an aircraft drawing? (AM.I.B.K1)

In the lower right-hand corner of the drawing.

How can you know that the aircraft drawing you are using is the most current version of the drawing? (AM.I.B.K1)

By the number in the revision block, and by the log of the most recent drawings.

What is a detail drawing? (AM.I.B.K1)

A drawing that includes all the information needed to fabricate the part.

What is an assembly drawing? (AM.I.B.K1)

A drawing that shows all the components of a part in an exploded form. A parts list is included with an assembly drawing.

What is an installation drawing? (AM.I.B.K1)

A drawing that shows the location of the parts and assemblies on the complete aircraft.

What type of drawing is most helpful in troubleshooting a system? (AM.I.B.K1)

schematic diagram

What is a block diagram? (AM.I.B.K1)

A drawing that shows the various functions of a system by a series of blocks. These blocks do not include any detail, but instead indicate what happens in each block.

How are dimensions shown on an aircraft drawing?

By numbers shown in the break of a dimension line.

What is the purpose of a center line on an aircraft drawing? (AM.I.B.K1)

It divides a part into symmetrical halves.

Which has the more critical center of gravity range, an airplane or a helicopter?

Helicopter

Where is the center of gravity for most airplanes located in relation to the center of lift? (AM.I.C.K4)

The CG is normally ahead of the center of lift.

How do you find the moment of an item installed in an aircraft? (AM.I.C.K4)

Multiply the weight of the item in pounds by its distance from the datum in inches.

Where do you find the arm of an item installed in an aircraft? (AM.I.C.K4)

In the Type Certificate Data Sheets or the aircraft equipment list.

How tight should an MS flareless fitting be tightened? (AM.I.D.K3)

Tighten the fitting by hand until it is snug, and then turn it with a wrench for 1/6-turn to 1/3-turn.Never turn it more than 1/3-turn with a wrench.

What damage can be caused by overtightening an MS flareless fitting? (AM.I.D.K3)

Overtightening drives the cutting edge of the sleeve deep into the tube and weakens it.

What kind of rigid tubing can be flared with a double flare?

5052-O and 6061-T aluminum alloy tubing in sizes from 1/8-inch to 3/8-inch OD.

What should be done to the end of a tube that is to be flared? (AM.I.D.K3)

The cut end should be polished to remove any sharp edges that could cause the tubing to crack.

When starting an aircraft engine equipped with a float carburetor, in what position should the carburetor heat control be placed? (AM.I.F.K5)

In the Cold position.

What is meant by a liquid lock in the cylinder of an aircraft engine, and how is it cleared? (AM.I.F.K5)

Oil accumulates in the cylinders below the center line of the engine and prevents the piston from moving to the top of its stroke. To clear a liquid lock, remove one of the spark plugs and turn the engine crankshaft until all of the oil is forced out of the cylinder.

What is the procedure if a hung start occurs when starting a turbojet engine?

Terminate the starting operation and find the reason the engine would not accelerate as it should.

How far ahead of an idling turbojet engine does the danger area extend?

25 feet

What are the control tower light signals that may be used when taxiing or towing an aircraft, and what are their meanings? (AM.I.F.K5)

a. Flashing green—Cleared to taxi. b. Steady red—Stop. c. Flashing red—Taxi clear of runway in use. d. Flashing white—Return to starting point. e. Alternating red and green—Exercise extreme caution.

What is meant by detonation in an aircraft reciprocating engine? (AM.I.F.K5)

Detonation is an uncontrolled burning of the fuel in the cylinder of an engine. It is an explosion, rather than a smooth burning.

What is used to clean transparent plastic windshields and windows of an aircraft?

Mild soap and lots of clean water.

What is used to neutralize the electrolyte from a lead-acid battery that has been spilled on an aircraft structure? (AM.I.G.K1)

A solution of bicarbonate of soda and water.

What is used to neutralize the electrolyte from a nickel-cadmium battery that has been spilled on an aircraft structure? (AMIG.K1)

A solution of boric acid and water, or vinegar.

What solvent is recommended for removing grease from aircraft fabric prior to doping it? (AM.I.G.K1)

Methyl Ethyl Ketone (MEK) or lacquer thinner.

What is the proper way to clean plastics? (AM.I.G.K1)

Flush the plastic with clean water. Remove dirt by hand. Plastics are easily scratched and usage of rags is not recommended.

What must be done to a piece of aluminum alloy to remove surface corrosion and to treat the metal to prevent further corrosion? (AM.I.G.K7)

Remove the corrosion residue with a bristle brush or a nylon scrubber. Neutralize the surface with chromic acid or with some type of conversion coating. Protect the surface from further corrosion with a coat of paint.

How may rust be removed from a highly stressed metal part? (AM.I.G.K7)

By glass bead blasting, by careful polishing with mild abrasive paper, or by using fine buffing compound on a cloth buffing wheel.

What tools are proper for removing corrosion from aluminum alloy? (AM.I.G.K7)

Aluminum wool or aluminum wire brushes. Severe corrosion can be removed with a rotary file.

What type of device is used to remove surface corrosion from a piece of magnesium alloy? (AM.I.G.K7)

A stiff hog-bristle brush.

What must be done to a piece of aluminum alloy to remove surface corrosion and to treat the metal to prevent further corrosion? (AM.I.G.K7)

Remove the corrosion residue with a bristle brush or a nylon scrubber. Neutralize the surface with chromic acid or with some type of conversion coating. Protect the surface from further corrosion with a coat of paint.

How is rust removed from a highly stressed metal part? (AM.I.G.K7)

By glass bead blasting, by careful polishing with mild abrasive paper, or by using fine buffing compound on a cloth buffing wheel.

What are three types of primer that may be used when painting an aircraft?

Zinc chromate primer, wash primer, and epoxy primer.

What type of thinner is used with zinc chromate primer? (AM.I.G.K14)

Toluol or toluene.

What are two types of fluids? (AM.I.J.K7)

Liquid and gaseous.

What is meant by the density of a fluid? (AM.I.J.K7)

Mass per unit volume of a fluid.

What is meant by the specific gravity of a fluid? (AM.I.J.K7)

The ratio of the density of the fluid to the density of pure water.

What effect does the increase in temperature of a confined gas have on its pressure? (AM.I.J.K7)

When the volume of a gas remains constant, an increase in its temperature increases its pressure.

What effect does high humidity have on piston engine performance? (AM.I.J.KT)

Water vapor is less dense than dry air and thus high humidity decreases the density of the air. The less dense air decreases engine performance.

How many cubic inches of fluid is forced out of a cylinder by a piston with an area of 20 square inches, when the piston moves five inches? (AM.I.J.K7)

100 cubic inches.

What will happen to the pressure of a confined gas if the temperature of the gas is increased? (AM.I.J.K7)

The pressure will increase

What effect does an increase in density altitude have on engine performance?

As density altitude increases, air density decreases and engine performance decreases.

What is the proper type of nondestructive inspection to use for locating surface cracks in an aluminum alloy casting or forging? (AM.I.K.K3)

Fluorescent or visual dye penetrant.

What is the principle upon which ultrasonic inspection is based? (AM.I.K.K3)

Any fault within a material will change the material's resonant frequency. Comparing the resonant frequency of a known sound material with the material under test will indicate the presence of a fault.

What is the procedure when making a dye penetrant inspection of a part?

Clean the part thoroughly, apply the penetrant, and allow it to soak for the recommended dwell time. Remove all of the penetrant from the surface and apply the developer.

**1. What is the most important law applicable to the study of electricity (ohm's law equation)?

Ohm's Law (E = 1 x R).

2. What are the elements of Ohm's Law?

Voltage (E), Current (I), and Resistance (R).

**3. What are four sources of electrical energy?

Thermal, light, pressure, chemical, and magnetic.

4. What does an electrical circuit consist of ?

1. A source (battery). 2. Resistance or load (Light bulb). 3. Conductors (Wires).

**5. What represents capacitance in an AC circuit?

A capacitor (same as a condenser).

**6. What is the function of a capacitor?

To store electricity.

**7. What is the unit of measure for capacitance?

Farad.

**8. What is the standard unit of measure for frequency?

Hertz.

**9. What is the basic component that only allows current to flow in one direction?

A diode (acts like a check-valve).

**10. What is inductance?

Induced voltage which is opposite in direction to the applied voltage.

11. What is an example of an inductor in a magneto?

The coil.

**12. What is impedance (define the term impedance)?

The total opposition to the flow of current in an electrical circuit.

**13. What causes opposition to the flow of current in an AC circuit?

Resistance, Inductive, and capacitance reactance.

14. What is the unit of measurement for impedance?

Ohms.

**15. What is the general purpose of a resistor?

To limit current.

What is the most important law applicable to the study of electricity (ohm's law equation)?

Ohm's Law (E = I \times R).

What are the elements of Ohm's Law?

Voltage (E), Current (I), and Resistance (R).

What are four sources of electrical energy?

Thermal, light, pressure, chemical, and magnetic.

What does an electrical circuit consist of?

| 1. A source (battery). 2. Resistance or load (Light bulb). 3. Conductors (Wires). |

What represents capacitance in an AC circuit? |

A capacitor (same as a condenser). |

What is the function of a capacitor?

| To store electricity. |

What is the unit of measure for capacitance?

| Farad. |

What is the standard unit of measure for frequency?

| Hertz. |

What is the basic component that only allows current to flow in one direction?

| A diode (acts like a check-valve). |

What is inductance?

| Induced voltage which is opposite in direction to the applied voltage. |

What is an example of an inductor in a magneto?

| The coil. |

What is impedance (define the term impedance)?

| The total opposition to the flow of current in an electrical circuit. |

What causes opposition to the flow of current in an AC circuit? |

Resistance, Inductive, and capacitance reactance. |

What is the unit of measurement for impedance?

| Ohms. |

What is the general purpose of a resistor?

| To limit current. |

How may the value of a small, fixed resistor be determined?

| By the color bands on the resistor. |

What are two things that happen when current flows through a conductor?

| A magnetic field is generated, and the conductor heats up. |

What is the common name for the lines of force that make up a field surrounding a magnet?

| Magnetic flux lines. |

What is the concept that describes the relationship between electricity and magnetism?

| Electromagnetism. |

What are the four factors that affect the resistance of an electrical conductor?

| The wire gauge, length, temperature, and material. |

What is the unit of measurement of power in a DC circuit?

| The watt. Amperes times volts equals watts (P = I \times E). 746 watts equals one horsepower. |

What is a kilowatt?

| It is 1,000 watts. |

In a DC circuit, what occurs when voltage is increased while resistance remains constant?

| There will be an increase in current. |

What are the three types of DC electrical circuits?

| They are Series circuits, Parallel circuits, and complex circuits (series and parallel). |

A 24 volt lead-acid battery has how many cells?

| It has 12 cells. Each cell is rated at approx. 2 volts. 12 C x 2 V = 24V |

What are the units that battery capacity are measured in?

| Ampere-hours. |

What should be the specific gravity of the electrolyte in a fully charged lead acid battery?

| It should be between 1.275 and 1.300. |

What instrument is used to determine the specific gravity of electrolyte in a lead acid battery?

| A hydrometer. |

Why can a hydrometer NOT be used to determine the charge of a nickel-cadmium battery?

| The specific gravity of the electrolyte in a nickel-cadmium battery does not change appreciably (enough to be noticed) during charge or discharge of the battery. |

When using a hydrometer to check the charge of a lead-acid battery, at what temperatures must a correction factor be applied to the reading?

| Adjustments must be made if temperature of the electrolyte is above 90°F or below 70°F. 80°F don't require temperature corrections. |