BAKERS SCHOOL OF AERONAUTICS
ORAL PREP EXAM QUESTIONS AND
ANSWERS
What is the most important law applicable to the study of electricity? -ANSOhm's Law
What are the elements of Ohm's Law? -ANSVoltage, Current & Resistance
What are four sources of electrical power? -ANSMechanical, chemical, photoelectric
and thermal
What does an electrical circuit consist of? -ANS1. a source of electrical pressure
2. resistance
3. conductors
What represents capacitance in an AC circuit? -ANSa capacitor
What is the function of a capacitor? -ANSto store electricity
What is the unit of measure for capacitance? -ANSFarad
What is inductance? -ANSWhen voltage is induced by magnetic flux
What is an example of an inductor in a magneto? -ANSthe coil
What is impedance? -ANStotal opposition for AC to flow
What is the unit of measurement for impedance? -ANSOhms
What are two things that happen when current flows through a conductor? -ANSa
magnetic field; heats up
What are the four factors that affect the resistance of an electrical conductor? -
ANSgauge, length, temperature and material
What is the unit of measurement of power in a DC circuit? -ANSwatt
What is a kilowatt? -ANS1,000 watts
In a DC circuit, what occurs when voltage is increased while resistance remains
constant? -ANSincrease in current
,What are the three types of DC electrical circuits? -ANSseries, parallel, and complex
A 24 volt lead-acid battery has how many cells? -ANS12 cells. Each rated at 2 volts.
What are the units that battery capacity are measured in? -ANSAmpere-hours
What should be the specific gravity of the electrolyte in a fully charge lead acid battery?
-ANSbetween 1,275 and 1,300
What instrument is used to determine the specific gravity of electrolyte in a lead acid
battery? -ANSa hydrometer
Why can a hydrometer NOT be used to determine the charge of a nickel-cadmium
battery? -ANSSpecific gravity of the electrolyte in a nickel-cadmium battery does not
change appreciably
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? -ANSabove 90F or
below 70F
What is the electromagnetic induction? -ANStransfer of electrical energy by means of a
magnetic field
How are battery compartments protected against corrosion? -ANScoated with special
corrosion resistant paint
What should be the correct electrolyte level in a properly serviced battery? -ANS3/8
inches above the plates
What are paralleling generators and how is the load distributed? -ANSwhen two or more
generators are operated at the same time; must be shared equality
Describe a no-trip circuit breaker (trip free). -ANSmakes it impossible to manually hold
the circuit closed
Can you store Ni-cad and Lead-acid batteries together? -ANShas a low internal
resistance, the current will increase, causing it to heat up
What type of lines are used on aircraft drawings to indicate hidden views, center lines,
and alternate position lines? -ANSa hidden view line is medium width and made up of
short dashes. represents and edge that cannot be seen
center lines are thin and made up of alternating long and short dashes. used to indicate
the center.
alternate position lines are medium width and made up of one long and two short evenly
spaced dashes. used to show the alternate position of apart.
,What is a sketch for a repair? -ANSIt is a basic drawing that shows specific information
and provides minimum detail needed to manufacture a part.
What type of drawing is most helpful in troubleshooting a system? -ANSA schematic
Define "tolerance" as used in aircraft drawings. -ANSthe difference between the plus
and minus allowable dimension.
Define "clearance" as used in aircraft drawings. -ANSdimension given for the space.
What is a fuselage station number? -ANSdistance from the datum.
What information is given in the title block of a blueprint? -ANSnumber, name, scale,
date, firm, draftsman, checker and approving official.
Where is the title block usually found on an aircraft drawing? -ANSlower right corner
Why are the dimensions used, and how are they shown on the aircraft drawings? -
ANSsolid narrow lines, broken at midpoint. indicate the size.
How can a change to an aircraft drawing be identified? -ANSrevision letter
What is the "bill of materials" associated with aircraft blueprint? -ANSlist of materials
and parts for fabrication or assembly.
Why are symbols used when drawing aircraft blueprints? -ANSshorthand used in
drawings.
How many views are required to determine the shape of an object? -ANSfront, top and
right side.
What is the datum and its purpose when making weight and balance computations? -
ANSimaginary vertical lines from all measurements are taken and to determine the
relative location of items in the aircraft.
What is the purpose of weight and balance control? -ANSfor safety and efficiency in
flight.
When computing weight and balance, what is the 'movement' and how is it obtained? -
ANSmoment is a force which tends to rotate the aircraft. multiplying the weight by the
distance from the datum.
What is the 'arm' of an item and how is it obtained? -ANSthe distance is located either
from the datum.
, What is 'tare weight' and how is it handled when making weight and balance
calculations? -ANSweight of extra equipment
What is meant by 'minimum fuel' and how is it calculated for weight and balance? -
ANSfuel that should be used in weight and balance. reciprocating engine airplane
certified under FAR Part 23. one half hour at maximum continuous power.
What is meant by 'residual' fuel? -ANSthe fuel remaining after fuel exhaustion.
What is meant by the center of gravity range? -ANSdistance from the most forward to
the most rearward.
How would you determine the empty weight and empty weight C.G. of an aircraft if all
weight and balance records are missing? -ANSRe-weigh and calculate new weight and
balance records.
What is ballast? -ANSweight which placed in the aircraft to attain a desired C.G.
What is the difference between fixing wing and rotor wing(helicopter) aircraft C.G.
ranges? -ANSin a helicopter is much more critical than fixed-wing aircraft
When weighting an aircraft to determine the empty weight C.G., what must you do with
regard to the fixed equipment which is normally carried in the aircraft? -ANSall
operations equipment.
Why do some manufactures specify an empty C.G. even though the aircraft is not
operated at this empty weight? -ANSwhen the empty weight C.G. falls within the empty
weight C.G. range, it is unnecessary to perform a weight and balance check if standard
loading and seating arrangements are used.
Why must the aircraft category be considered when computing weight and balance? -
ANSsome aircraft certified in multiple categories
Where is the center of gravity located in relation to the aerodynamic center of lift for
most airplanes? -ANSfront of the center of lift.
Is there a federal regulation that requires the regular reweighing of private aircraft? -
ANSNo.
Where must a record of the most recent empty weight and center of gravity be kept? -
ANSin the airplane flight manual or records.
What are aircraft plumbing lines usually made of? -ANSMetal tubing or flexible house
and fittings
How is metal tubing sized? -ANSBy outside diameter and wall thickness
ORAL PREP EXAM QUESTIONS AND
ANSWERS
What is the most important law applicable to the study of electricity? -ANSOhm's Law
What are the elements of Ohm's Law? -ANSVoltage, Current & Resistance
What are four sources of electrical power? -ANSMechanical, chemical, photoelectric
and thermal
What does an electrical circuit consist of? -ANS1. a source of electrical pressure
2. resistance
3. conductors
What represents capacitance in an AC circuit? -ANSa capacitor
What is the function of a capacitor? -ANSto store electricity
What is the unit of measure for capacitance? -ANSFarad
What is inductance? -ANSWhen voltage is induced by magnetic flux
What is an example of an inductor in a magneto? -ANSthe coil
What is impedance? -ANStotal opposition for AC to flow
What is the unit of measurement for impedance? -ANSOhms
What are two things that happen when current flows through a conductor? -ANSa
magnetic field; heats up
What are the four factors that affect the resistance of an electrical conductor? -
ANSgauge, length, temperature and material
What is the unit of measurement of power in a DC circuit? -ANSwatt
What is a kilowatt? -ANS1,000 watts
In a DC circuit, what occurs when voltage is increased while resistance remains
constant? -ANSincrease in current
,What are the three types of DC electrical circuits? -ANSseries, parallel, and complex
A 24 volt lead-acid battery has how many cells? -ANS12 cells. Each rated at 2 volts.
What are the units that battery capacity are measured in? -ANSAmpere-hours
What should be the specific gravity of the electrolyte in a fully charge lead acid battery?
-ANSbetween 1,275 and 1,300
What instrument is used to determine the specific gravity of electrolyte in a lead acid
battery? -ANSa hydrometer
Why can a hydrometer NOT be used to determine the charge of a nickel-cadmium
battery? -ANSSpecific gravity of the electrolyte in a nickel-cadmium battery does not
change appreciably
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? -ANSabove 90F or
below 70F
What is the electromagnetic induction? -ANStransfer of electrical energy by means of a
magnetic field
How are battery compartments protected against corrosion? -ANScoated with special
corrosion resistant paint
What should be the correct electrolyte level in a properly serviced battery? -ANS3/8
inches above the plates
What are paralleling generators and how is the load distributed? -ANSwhen two or more
generators are operated at the same time; must be shared equality
Describe a no-trip circuit breaker (trip free). -ANSmakes it impossible to manually hold
the circuit closed
Can you store Ni-cad and Lead-acid batteries together? -ANShas a low internal
resistance, the current will increase, causing it to heat up
What type of lines are used on aircraft drawings to indicate hidden views, center lines,
and alternate position lines? -ANSa hidden view line is medium width and made up of
short dashes. represents and edge that cannot be seen
center lines are thin and made up of alternating long and short dashes. used to indicate
the center.
alternate position lines are medium width and made up of one long and two short evenly
spaced dashes. used to show the alternate position of apart.
,What is a sketch for a repair? -ANSIt is a basic drawing that shows specific information
and provides minimum detail needed to manufacture a part.
What type of drawing is most helpful in troubleshooting a system? -ANSA schematic
Define "tolerance" as used in aircraft drawings. -ANSthe difference between the plus
and minus allowable dimension.
Define "clearance" as used in aircraft drawings. -ANSdimension given for the space.
What is a fuselage station number? -ANSdistance from the datum.
What information is given in the title block of a blueprint? -ANSnumber, name, scale,
date, firm, draftsman, checker and approving official.
Where is the title block usually found on an aircraft drawing? -ANSlower right corner
Why are the dimensions used, and how are they shown on the aircraft drawings? -
ANSsolid narrow lines, broken at midpoint. indicate the size.
How can a change to an aircraft drawing be identified? -ANSrevision letter
What is the "bill of materials" associated with aircraft blueprint? -ANSlist of materials
and parts for fabrication or assembly.
Why are symbols used when drawing aircraft blueprints? -ANSshorthand used in
drawings.
How many views are required to determine the shape of an object? -ANSfront, top and
right side.
What is the datum and its purpose when making weight and balance computations? -
ANSimaginary vertical lines from all measurements are taken and to determine the
relative location of items in the aircraft.
What is the purpose of weight and balance control? -ANSfor safety and efficiency in
flight.
When computing weight and balance, what is the 'movement' and how is it obtained? -
ANSmoment is a force which tends to rotate the aircraft. multiplying the weight by the
distance from the datum.
What is the 'arm' of an item and how is it obtained? -ANSthe distance is located either
from the datum.
, What is 'tare weight' and how is it handled when making weight and balance
calculations? -ANSweight of extra equipment
What is meant by 'minimum fuel' and how is it calculated for weight and balance? -
ANSfuel that should be used in weight and balance. reciprocating engine airplane
certified under FAR Part 23. one half hour at maximum continuous power.
What is meant by 'residual' fuel? -ANSthe fuel remaining after fuel exhaustion.
What is meant by the center of gravity range? -ANSdistance from the most forward to
the most rearward.
How would you determine the empty weight and empty weight C.G. of an aircraft if all
weight and balance records are missing? -ANSRe-weigh and calculate new weight and
balance records.
What is ballast? -ANSweight which placed in the aircraft to attain a desired C.G.
What is the difference between fixing wing and rotor wing(helicopter) aircraft C.G.
ranges? -ANSin a helicopter is much more critical than fixed-wing aircraft
When weighting an aircraft to determine the empty weight C.G., what must you do with
regard to the fixed equipment which is normally carried in the aircraft? -ANSall
operations equipment.
Why do some manufactures specify an empty C.G. even though the aircraft is not
operated at this empty weight? -ANSwhen the empty weight C.G. falls within the empty
weight C.G. range, it is unnecessary to perform a weight and balance check if standard
loading and seating arrangements are used.
Why must the aircraft category be considered when computing weight and balance? -
ANSsome aircraft certified in multiple categories
Where is the center of gravity located in relation to the aerodynamic center of lift for
most airplanes? -ANSfront of the center of lift.
Is there a federal regulation that requires the regular reweighing of private aircraft? -
ANSNo.
Where must a record of the most recent empty weight and center of gravity be kept? -
ANSin the airplane flight manual or records.
What are aircraft plumbing lines usually made of? -ANSMetal tubing or flexible house
and fittings
How is metal tubing sized? -ANSBy outside diameter and wall thickness
