PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
How is aircraft electrical power for propeller deicer systems
transferred from the engine to the propeller hub assembly?
A— By slip rings and segment plates. B— By slip rings and brushes.
C— By flexible electrical connectors. -
correct answer ✅B
How is anti-icing fluid ejected from the slinger ring on a propeller?
A— By pump pressure.
B— By centripetal force.
C— By centrifugal force. -
correct answer ✅C
On most reciprocating multiengine aircraft, automatic propeller
synchronization is accomplished through the actuation of the
A— throttle levers.
B— propeller governors.
C— propeller control levers. -
correct answer ✅B
,PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
Propeller fluid anti-icing systems generally use which of the
following? A— Ethylene glycol.
B— Isopropyl alcohol.
C— Ethyl alcohol. -
correct answer ✅B
What is a function of the automatic propeller synchronizing system
on multiengine aircraft?
A— To control the tip speed of all propellers.
B— To control engine RPM and reduce vibration.
C— To control the power output of all engines -
correct answer ✅B
Ice formation on a propeller blade will A— produce unbalance and
vibration. B— increase thrust and drag.
C— cause a change in blade angle. -
correct answer ✅A
What unit in the propeller anti-icing system controls the output of
the pump?
A— Pressure relief valve.
,PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
B— Rheostat.
C— Cycling timer. -
correct answer ✅B
Proper operation of electric deicing boots on individual propeller
blades may best be determined by
A— feeling the sequence of boot heating and have an assistant
observe the loadmeter indications.
B— observing the ammeter or loadmeter for current f low.
C— feeling the boots to see if they are heating. -
correct answer ✅A
A propeller synchrophasing system allows a pilot to reduce noise
and vibration by
A— adjusting the phase angle between the propellers on an
aircraft's engines.
B— adjusting the plane of rotation of all propellers.
C— setting the pitch angle of all propellers exactly the same. -
correct answer ✅A
, PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
Which of the following determines oil and grease specifications for
lubrication of propellers?
A— Lubricant manufacturer's instructions.
B— Engine manufacturer's instructions. C— Propeller
manufacturer's instructions. -
correct answer ✅C
Grease used in aircraft propellers reduces the frictional resistance
of moving parts and is easily molded into any form under pressure.
This statement defines
A— antifriction and plasticity characteristics of grease.
B— antifriction and chemical stability of grease.
C— viscosity and melting point of grease. -
correct answer ✅A
What type of imbalance will cause a two-blade propeller to have a
persistent tendency to come to rest in a horizontal position (with
the blades parallel to the ground) while being checked on a
propeller balancing beam?
A— Vertical.
B— Horizontal.
Questions and Answers
How is aircraft electrical power for propeller deicer systems
transferred from the engine to the propeller hub assembly?
A— By slip rings and segment plates. B— By slip rings and brushes.
C— By flexible electrical connectors. -
correct answer ✅B
How is anti-icing fluid ejected from the slinger ring on a propeller?
A— By pump pressure.
B— By centripetal force.
C— By centrifugal force. -
correct answer ✅C
On most reciprocating multiengine aircraft, automatic propeller
synchronization is accomplished through the actuation of the
A— throttle levers.
B— propeller governors.
C— propeller control levers. -
correct answer ✅B
,PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
Propeller fluid anti-icing systems generally use which of the
following? A— Ethylene glycol.
B— Isopropyl alcohol.
C— Ethyl alcohol. -
correct answer ✅B
What is a function of the automatic propeller synchronizing system
on multiengine aircraft?
A— To control the tip speed of all propellers.
B— To control engine RPM and reduce vibration.
C— To control the power output of all engines -
correct answer ✅B
Ice formation on a propeller blade will A— produce unbalance and
vibration. B— increase thrust and drag.
C— cause a change in blade angle. -
correct answer ✅A
What unit in the propeller anti-icing system controls the output of
the pump?
A— Pressure relief valve.
,PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
B— Rheostat.
C— Cycling timer. -
correct answer ✅B
Proper operation of electric deicing boots on individual propeller
blades may best be determined by
A— feeling the sequence of boot heating and have an assistant
observe the loadmeter indications.
B— observing the ammeter or loadmeter for current f low.
C— feeling the boots to see if they are heating. -
correct answer ✅A
A propeller synchrophasing system allows a pilot to reduce noise
and vibration by
A— adjusting the phase angle between the propellers on an
aircraft's engines.
B— adjusting the plane of rotation of all propellers.
C— setting the pitch angle of all propellers exactly the same. -
correct answer ✅A
, PowerPlant Propelllers Unit 1 ASA Exam
Questions and Answers
Which of the following determines oil and grease specifications for
lubrication of propellers?
A— Lubricant manufacturer's instructions.
B— Engine manufacturer's instructions. C— Propeller
manufacturer's instructions. -
correct answer ✅C
Grease used in aircraft propellers reduces the frictional resistance
of moving parts and is easily molded into any form under pressure.
This statement defines
A— antifriction and plasticity characteristics of grease.
B— antifriction and chemical stability of grease.
C— viscosity and melting point of grease. -
correct answer ✅A
What type of imbalance will cause a two-blade propeller to have a
persistent tendency to come to rest in a horizontal position (with
the blades parallel to the ground) while being checked on a
propeller balancing beam?
A— Vertical.
B— Horizontal.
