1|Page
ASA POWERPLANT ORAL EXAM 2 LATEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What is meant by flashing the field of a DC generator - ANSWER-
Restoring the residual magnetism to the frame of a generator by
passing battery current through the field coils in the same
direction it flows when the generator is producing current.
What kind of rectifier is used in a DC alternator of the type that is
used on most modern light airplanes – ANSWER-A full-wave,
three-phase rectifier made up of six silicon diodes.
What is used to maintain a constant frequency of the alternating
current that is produced by an AC alternator driven by an aircraft
turbine engine - ANSWER-A hydraulic constant-speed drive unit
between the engine & the alternator.
What three things must be synchronized before a three-phase AC
generator can be connected to a bus that is being served by
another generator - ANSWER-The voltage, the frequency, & the
phase rotation of the generators.
,2|Page
What must be done to reverse the direction of rotation of the
armature of a DC electric motor - ANSWER-The current flow must
be reversed through the armature or the field windings, but not
through both of them.
Does a series-wound DC motor have a high or a low starting
torque - ANSWER-A high starting torque.
Which aircraft electrical circuit does not contain a fuse or circuit
breaker - ANSWER-The starter motor circuit.
When removing a battery from an aircraft, which connection
should be removed first - ANSWER-The ground connection must
be disconnected first & connected last.
What is meant by the effective voltage of sine wave alternating
current - ANSWER-The value of the alternating current that is
needed to produce the same amount of heat as this value of
direct current.
,3|Page
What is a starter-generator that is used with many of the smaller
gas turbine engines - ANSWER-A single-engine-mounted
component that serves as a starter for starting the turbine engine.
When the engine is running, the circuitry can be shifted so it acts
as a compound-wound generator.
When should aircraft wiring be installed in a conduit - ANSWER-
When the wiring passes through an area in the aircraft where
open wiring could likely be damaged, such as through a wheel
well.
What is meant by the viscosity of engine lubricating oil -
ANSWER-The resistance of the oil to flow.
What is meant by a wet sump lubrication system - ANSWER-A
lubrication system in which the oil is carried inside the engine
itself.
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What is meant by a dry sump lubrication system - ANSWER-A
lubrication system in which the oil is carried in a tank that is not a
part of the engine.
How is oil temperature controlled in an aircraft reciprocating
engine - ANSWER-Hot oil is directed through the core of the oil
cooler, but cold oil is directed around the outside of the core so it
will not be further cooled.
Is the oil temperature shown on the aircraft instrument panel the
temperature of the oil entering the engine or of the oil leaving the
engine - ANSWER-It is the temperature of the oil entering the
engine.
What is the purpose of oil dilution in a reciprocating engine -
ANSWER-When very cold weather is anticipated, gasoline can be
mixed with the lubricating oil before the engine is shut down. This
reduces the viscosity of the oil & makes starting easier. When the
engine is running, the gasoline evaporates out of the oil.
ASA POWERPLANT ORAL EXAM 2 LATEST 2025/2026 ACTUAL EXAM
WITH COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(100% VERIFIED ANSWERS) |ALREADY GRADED A+| ||PROFESSOR
VERIFIED|| ||BRANDNEW!!!||
What is meant by flashing the field of a DC generator - ANSWER-
Restoring the residual magnetism to the frame of a generator by
passing battery current through the field coils in the same
direction it flows when the generator is producing current.
What kind of rectifier is used in a DC alternator of the type that is
used on most modern light airplanes – ANSWER-A full-wave,
three-phase rectifier made up of six silicon diodes.
What is used to maintain a constant frequency of the alternating
current that is produced by an AC alternator driven by an aircraft
turbine engine - ANSWER-A hydraulic constant-speed drive unit
between the engine & the alternator.
What three things must be synchronized before a three-phase AC
generator can be connected to a bus that is being served by
another generator - ANSWER-The voltage, the frequency, & the
phase rotation of the generators.
,2|Page
What must be done to reverse the direction of rotation of the
armature of a DC electric motor - ANSWER-The current flow must
be reversed through the armature or the field windings, but not
through both of them.
Does a series-wound DC motor have a high or a low starting
torque - ANSWER-A high starting torque.
Which aircraft electrical circuit does not contain a fuse or circuit
breaker - ANSWER-The starter motor circuit.
When removing a battery from an aircraft, which connection
should be removed first - ANSWER-The ground connection must
be disconnected first & connected last.
What is meant by the effective voltage of sine wave alternating
current - ANSWER-The value of the alternating current that is
needed to produce the same amount of heat as this value of
direct current.
,3|Page
What is a starter-generator that is used with many of the smaller
gas turbine engines - ANSWER-A single-engine-mounted
component that serves as a starter for starting the turbine engine.
When the engine is running, the circuitry can be shifted so it acts
as a compound-wound generator.
When should aircraft wiring be installed in a conduit - ANSWER-
When the wiring passes through an area in the aircraft where
open wiring could likely be damaged, such as through a wheel
well.
What is meant by the viscosity of engine lubricating oil -
ANSWER-The resistance of the oil to flow.
What is meant by a wet sump lubrication system - ANSWER-A
lubrication system in which the oil is carried inside the engine
itself.
, 4|Page
What is meant by a dry sump lubrication system - ANSWER-A
lubrication system in which the oil is carried in a tank that is not a
part of the engine.
How is oil temperature controlled in an aircraft reciprocating
engine - ANSWER-Hot oil is directed through the core of the oil
cooler, but cold oil is directed around the outside of the core so it
will not be further cooled.
Is the oil temperature shown on the aircraft instrument panel the
temperature of the oil entering the engine or of the oil leaving the
engine - ANSWER-It is the temperature of the oil entering the
engine.
What is the purpose of oil dilution in a reciprocating engine -
ANSWER-When very cold weather is anticipated, gasoline can be
mixed with the lubricating oil before the engine is shut down. This
reduces the viscosity of the oil & makes starting easier. When the
engine is running, the gasoline evaporates out of the oil.
