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45 Cards in this Set
- Front
- Back
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What is the most important law applicable to the study of electricity
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Ohms law I=E/R
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What are the elements of Ohms Law
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Voltage (E) Current (I) Resistance (R)
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What are he sources of electrical power
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Mechanical (generator), Chemical (battery) , Photoelectric (Light), and Thermal (heat)
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What does and electrical circuit consist of
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Electrical pressure/ Resistance to provide electrical flow
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What represents capacitance in an AC circuit
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A capacitor (condenser)
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What is the function of a capacitor
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to store electricity
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what is inductance
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A voltage that is induced by magnetic flux lines in a coil of an AC circuit
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What is impedance
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The opposition for AC to flow caused by the combined effect of resistance , inductive reactance, and capacitive reactance in an AC circuit
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What is the unit of measurement of power in a DC circuit
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The watt P=IxE
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one horsepower is equal to
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746 watts
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What is a Kilowatt
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1,000 watts
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In a DC circuit, What occurs when voltage is increased while resistance remains the same
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There will be an increase in current
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What are the three types of DC electrical circuits
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Series, Parallel, and series paralles
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a 24 volt battery has how many cells
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12 at 2 volts per cell
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What should be the specific gravity of the electrolyte in a fully charged lead acid battery
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1.275-1.300
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What instrument is used to determine the specific gravity of the electrolyte in a lead acid battery
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a hydrometer
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Why can't a hydrometer be used to determine the charge of a nickel-cadmium battery
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specific gravity of the electrolyte doesn't change during the charge or discharge
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when using a hydrometer to check the charge of a lead acid battery, at what temps must a correction factor be made
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when the electrolyte is Above 90 or below 70
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What is electromagnetic induction
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the transfer of electrical energy by means of a magnetic field (lines of flux)
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how are battery compartments protected from corrosion
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with a corrosion resistant paint. such as Bitminous paint
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what should be the correct electrolyte level in a properly charged lead acid battery
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approx 3/8 inch above plates if the battery has baffle plates or the electrolyte should be up to the holes in the baffle plate in each cell
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what is paralleling
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when two or more generators are operated at the same time to supply power for a load that must be shared equally
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What is a no trip breaker
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a breaker that makes it impossible to manually hold the breaker closed when tripped (breaker gets hot and must cool before reset is possible)
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Can NiCad and Lead acid batteries be stored together
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No, fumes from the lead acid battery can contaminate the electrolyte in the NiCad
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what type of lines are used on aircraft drawing to indicate hidden views
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medium lines with short dashes
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What type of lines are used on aircraft drawing to indicate Alternate positions
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Medium lines with one long and two short dashs
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What type of lines are used on aircraft drawings to indicate Center lines
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Alternate long and short dashes
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Define Tolerance as used in aircraft drawings
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the difference between the plus and minus allowable dimensions of a part
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define Clearance as used on a drawing
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the dimension for the space between parts
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what information is given to the title block of a blueprint
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drawing number
name of part scale the date firm and the name if the draftsman, checker and approving official |
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why are dimensions uses, and how are they shown
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dimensions are solid narrow lines broken at midpoint for the insertion of measurements that are used to indicate the size of the object
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how can a change to an drawing be identified
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by its revision letter in the table next to the title block
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What is the bill of material associated with the blueprints
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list of materials and parts necessary for the fabrication or assembly of the component
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why are symbols used when drawing
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symbols are a type of short hand.
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how many views are required to determine the shape of an object
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3 front top and side
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What is the datum and it's purpose
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imaginary vertical line or plain from which measurements are taken to determine the location of an object on the aircraft
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what is the purpose of weight and balance control
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Safety and efficiency in flight
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what is the Moment and how is it obtained
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weight x distance form datum
a force which tends to rotate the aircraft about it's center of gravity |
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what is the "arm" of an item how is it obtained
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Horizontal distance between datum (inches) and the center of gravity
it's obtained by measurements or from A/C weight and balance records |
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What it "tare weight" how is it handled when making weight and balance calculations
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"tare" is the extra equipment used for weighing the A/C must be subtracted from scales.
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what is meant by minimum fuel and how is it calculated
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fuel required to operate the engines for 1/2 hour at maximum continuous power
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What is meant by residual fuel.
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fuel remaining in the tanks, lines and engine after draining Undrainable or usable fuel.
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how would you determine the empty weight and empty weight CG if all records are missing
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Reweigh the A/C and calculate the new weight and balance.
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What is Ballast
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items of weight that are placed in the A/C to attain a desired CG location
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What is the difference between fixed wing aircraft and Helio CG ranges
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CG locations is more critical in helio's
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