293 Oral Exam Review (Gamma / Wheels
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100 Questions with Answers & Rationales |
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Question 1:
What is the primary purpose of the "Gamma" or beta range on a turboprop
propeller?
a. To provide maximum cruise efficiency
b. To provide ground fine pitch for maximum reverse thrust and directional
control during landing rollout, and to allow for fine pitch settings for taxi
c. To adjust propeller speed during climb
d. To feather the propeller in case of engine failure
Rationale: The beta range is a power management mode where the pilot directly
controls blade angle via the power levers, independent of the propeller governor.
This is critical for ground maneuvering and efficient stopping.
Question 2:
What happens to propeller blade angle when the power lever is moved to the
"Flight Idle" stop from the "Ground Idle" position?
a. The propeller blade angle decreases (flattens)
b. The propeller blade angle increases (coarsens) to reduce drag and prepare
the engine for in-flight operations
c. The propeller feathering occurs
d. The propeller blade angle remains unchanged
Rationale: In ground idle, the blades are at a fine pitch to minimize thrust for taxi.
Flight idle increases the angle to prevent overspeeding and reduce drag on
approach.
,Question 3:
What is the function of the propeller governor?
a. To control the power lever position
b. To maintain constant propeller RPM by adjusting blade angle
c. To feather the propeller
d. To control fuel flow
Rationale: The propeller governor maintains a constant RPM by automatically
adjusting blade angle in response to changes in power or airspeed. It uses
flyweights and a speeder spring to control blade angle.
Question 4:
What is the purpose of the propeller feathering system?
a. To increase propeller RPM
b. To reduce drag during engine failure by turning the blades edge-on to the
airflow
c. To increase reverse thrust
d. To decrease fuel consumption
Rationale: Feathering turns the propeller blades to a high-angle position
(approximately 90°) to minimize drag during engine failure. This reduces
asymmetric drag and improves single-engine performance.
Question 5:
What is the difference between alpha and beta range in a turboprop?
a. Alpha range controls blade angle; beta range controls RPM
b. Alpha range is for flight operations where the governor controls RPM; beta
range is for ground operations where the pilot controls blade angle
c. Alpha range is for reverse thrust; beta range is for forward thrust
d. There is no difference
Rationale: Alpha range (flight) allows the governor to maintain constant RPM.
Beta range (ground) gives the pilot direct control over blade angle for taxi, reverse
thrust, and ground maneuvering.
,Question 6:
What is the purpose of the propeller synchronizer?
a. To increase engine power
b. To match the RPM of multiple propellers to reduce noise and vibration
c. To feather the propellers
d. To control blade angle
Rationale: Propeller synchronizers automatically match the RPM of propellers on
multi-engine aircraft, reducing noise and vibration and improving passenger
comfort.
Question 7:
Which component prevents the propeller from overspeeding during a rapid power
reduction?
a. The fuel control unit
b. The propeller governor and its overspeed governor
c. The power lever
d. The beta valve
Rationale: The propeller governor and overspeed governor work together to
prevent overspeeding by increasing blade angle when RPM rises above the set
point.
Question 8:
What is the function of the propeller auto-feather system?
a. To feather the propeller automatically during normal operation
b. To automatically feather a propeller during engine failure to reduce drag
c. To unfeather the propeller
d. To control RPM
Rationale: The auto-feather system senses a critical loss of power (e.g., engine
failure) and automatically feathers the propeller to reduce drag and improve single-
engine performance.
, Question 9:
What is the purpose of the unfeathering accumulator?
a. To store hydraulic pressure for braking
b. To provide hydraulic pressure to unfeather a propeller during an in-flight
restart
c. To store electrical power
d. To control fuel flow
Rationale: The unfeathering accumulator stores hydraulic pressure (or uses
nitrogen pressure) to provide the force needed to move the propeller blades out of
the feathered position during a restart attempt.
Question 10:
What is the significance of the "gated" power lever position in a turboprop?
a. It indicates maximum power
b. It provides a physical detent that prevents inadvertent movement into the
beta/reverse range during flight
c. It indicates minimum power
d. It controls propeller feathering
Rationale: The gate is a physical stop or detent that prevents the pilot from
accidentally moving the power levers from the flight range into the beta/reverse
range during flight, which would cause a rapid RPM increase or loss of power.
Question 11:
What is the relationship between propeller blade angle and engine RPM?
a. Increasing blade angle increases RPM
b. Increasing blade angle decreases RPM, and decreasing blade angle
increases RPM
c. There is no relationship
d. Blade angle only affects forward speed
Rationale: Increasing blade angle (coarsening) increases the load on the engine,
causing RPM to decrease. Decreasing blade angle (flattening) reduces load,
allowing RPM to increase.
Up) Exam Comprehensive Question Bank |
100 Questions with Answers & Rationales |
Latest Update
Question 1:
What is the primary purpose of the "Gamma" or beta range on a turboprop
propeller?
a. To provide maximum cruise efficiency
b. To provide ground fine pitch for maximum reverse thrust and directional
control during landing rollout, and to allow for fine pitch settings for taxi
c. To adjust propeller speed during climb
d. To feather the propeller in case of engine failure
Rationale: The beta range is a power management mode where the pilot directly
controls blade angle via the power levers, independent of the propeller governor.
This is critical for ground maneuvering and efficient stopping.
Question 2:
What happens to propeller blade angle when the power lever is moved to the
"Flight Idle" stop from the "Ground Idle" position?
a. The propeller blade angle decreases (flattens)
b. The propeller blade angle increases (coarsens) to reduce drag and prepare
the engine for in-flight operations
c. The propeller feathering occurs
d. The propeller blade angle remains unchanged
Rationale: In ground idle, the blades are at a fine pitch to minimize thrust for taxi.
Flight idle increases the angle to prevent overspeeding and reduce drag on
approach.
,Question 3:
What is the function of the propeller governor?
a. To control the power lever position
b. To maintain constant propeller RPM by adjusting blade angle
c. To feather the propeller
d. To control fuel flow
Rationale: The propeller governor maintains a constant RPM by automatically
adjusting blade angle in response to changes in power or airspeed. It uses
flyweights and a speeder spring to control blade angle.
Question 4:
What is the purpose of the propeller feathering system?
a. To increase propeller RPM
b. To reduce drag during engine failure by turning the blades edge-on to the
airflow
c. To increase reverse thrust
d. To decrease fuel consumption
Rationale: Feathering turns the propeller blades to a high-angle position
(approximately 90°) to minimize drag during engine failure. This reduces
asymmetric drag and improves single-engine performance.
Question 5:
What is the difference between alpha and beta range in a turboprop?
a. Alpha range controls blade angle; beta range controls RPM
b. Alpha range is for flight operations where the governor controls RPM; beta
range is for ground operations where the pilot controls blade angle
c. Alpha range is for reverse thrust; beta range is for forward thrust
d. There is no difference
Rationale: Alpha range (flight) allows the governor to maintain constant RPM.
Beta range (ground) gives the pilot direct control over blade angle for taxi, reverse
thrust, and ground maneuvering.
,Question 6:
What is the purpose of the propeller synchronizer?
a. To increase engine power
b. To match the RPM of multiple propellers to reduce noise and vibration
c. To feather the propellers
d. To control blade angle
Rationale: Propeller synchronizers automatically match the RPM of propellers on
multi-engine aircraft, reducing noise and vibration and improving passenger
comfort.
Question 7:
Which component prevents the propeller from overspeeding during a rapid power
reduction?
a. The fuel control unit
b. The propeller governor and its overspeed governor
c. The power lever
d. The beta valve
Rationale: The propeller governor and overspeed governor work together to
prevent overspeeding by increasing blade angle when RPM rises above the set
point.
Question 8:
What is the function of the propeller auto-feather system?
a. To feather the propeller automatically during normal operation
b. To automatically feather a propeller during engine failure to reduce drag
c. To unfeather the propeller
d. To control RPM
Rationale: The auto-feather system senses a critical loss of power (e.g., engine
failure) and automatically feathers the propeller to reduce drag and improve single-
engine performance.
, Question 9:
What is the purpose of the unfeathering accumulator?
a. To store hydraulic pressure for braking
b. To provide hydraulic pressure to unfeather a propeller during an in-flight
restart
c. To store electrical power
d. To control fuel flow
Rationale: The unfeathering accumulator stores hydraulic pressure (or uses
nitrogen pressure) to provide the force needed to move the propeller blades out of
the feathered position during a restart attempt.
Question 10:
What is the significance of the "gated" power lever position in a turboprop?
a. It indicates maximum power
b. It provides a physical detent that prevents inadvertent movement into the
beta/reverse range during flight
c. It indicates minimum power
d. It controls propeller feathering
Rationale: The gate is a physical stop or detent that prevents the pilot from
accidentally moving the power levers from the flight range into the beta/reverse
range during flight, which would cause a rapid RPM increase or loss of power.
Question 11:
What is the relationship between propeller blade angle and engine RPM?
a. Increasing blade angle increases RPM
b. Increasing blade angle decreases RPM, and decreasing blade angle
increases RPM
c. There is no relationship
d. Blade angle only affects forward speed
Rationale: Increasing blade angle (coarsening) increases the load on the engine,
causing RPM to decrease. Decreasing blade angle (flattening) reduces load,
allowing RPM to increase.
