Aviation Propeller Mechanics Quiz

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Questions and Answers

On a multi-engine aircraft equipped with a conventional constant-speed, variable-pitch, full-feathering propeller, which direction does increasing oil pressure in the propeller hub move the blades?

  • Toward high-pitch, low rpm
  • Toward low-pitch, high rpm (correct)
  • Toward low-pitch, low rpm

What is the recommended bank angle to use when performing turns with one engine inoperative?

  • 15 degrees (correct)
  • 20 degrees
  • 5 degrees
  • 10 degrees

Which factors lower the minimum control speed (Vmc)?

  • An increase in weight and forward CG (correct)
  • An increase in weight and an aft center of gravity (CG)
  • A decrease in weight and an aft CG

The propellers' asymmetric load contributes to the left turning tendency in conventional airplanes.

<p>True (A)</p> Signup and view all the answers

There are two types of fuel pumps to provide fuel pressure: engine-driven fuel pumps and electrical boost pumps.

<p>True (A)</p> Signup and view all the answers

The recommended takeoff speed is Vmc + 5 knots.

<p>True (A)</p> Signup and view all the answers

To execute an instrument approach on one engine, plan to fly the final approach segment at Vyse or Vmc, whichever is lower.

<p>False (B)</p> Signup and view all the answers

The right engine is critical in multi-engine airplanes that have engine configurations in which both propellers turn clockwise.

<p>False (B)</p> Signup and view all the answers

Vxse is defined as:

<p>Best angle of climb OEI (A)</p> Signup and view all the answers

During takeoff run, in addition to monitoring the RPM, manifold pressure (MAP), and oil temperature and pressure, the pilot should also check:

<p>FF and airspeed (A)</p> Signup and view all the answers

Select the true statement:

<p>Executing a stabilized approach can help prevent having to perform a risky engine-out go-around (C)</p> Signup and view all the answers

The recommended procedure for tight turns while rolling on the ground is:

<p>Power differential (C)</p> Signup and view all the answers

An engine failure must be considered for all departures in a multi-engine airplane.

<p>True (A)</p> Signup and view all the answers

The speed for best Rate of Climb in a multi-engine airplane is called:

<p>Vy (D)</p> Signup and view all the answers

The accelerate-stop distance (ASD) is longer when the density altitude is lower.

<p>False (B)</p> Signup and view all the answers

The left engine is the critical engine in all twin engine aircraft.

<p>False (B)</p> Signup and view all the answers

The asymmetrical load of the propellers tends to make conventional airplanes turn to the left.

<p>True (A)</p> Signup and view all the answers

The landing gear warning horn will not sound if the gear is up and only one throttle is reduced to idle.

<p>False (B)</p> Signup and view all the answers

What rate of climb determines the single-engine service ceiling for a twin-engine airplane?

<p>50 ft/min (B)</p> Signup and view all the answers

If you determine the inoperative engine cannot be restarted after failure, you should always feather the propeller to reduce drag.

<p>True (A)</p> Signup and view all the answers

Define takeoff decision speed (V1):

<p>The highest speed at which the pilot must initiate action to stop the airplane in the event of an aborted takeoff (C)</p> Signup and view all the answers

During takeoffs, a propeller synchronizer may be used to balance the RPM between engines.

<p>False (B)</p> Signup and view all the answers

During a one-engine-inoperative (OEI) approach, flaps should be operated as little as possible until the landing is assured.

<p>True (A)</p> Signup and view all the answers

Which of the following causes more drag during an engine failure?

<p>Windmilling propeller (A)</p> Signup and view all the answers

If a takeoff is initiated at an altitude greater than the one-engine-inoperative service ceiling, an engine failure will result in:

<p>level flight after take-off (B)</p> Signup and view all the answers

The altitude at which Vx and Vy are the same is called:

<p>Absolute ceiling (D)</p> Signup and view all the answers

A red light on the landing gear indication system means the wheels are ascending, descending, or not yet locked.

<p>True (A)</p> Signup and view all the answers

Turbocharging increases the service airplane's ceiling by providing sea level or greater map at high altitudes.

<p>True (A)</p> Signup and view all the answers

Flashcards

What happens to propeller blades when oil pressure increases?

The propeller blades move toward low-pitch, increasing the engine rpm.

What is the recommended bank angle for a single-engine inoperative turn?

The recommended bank angle for a single-engine inoperative turn is 15 degrees.

Why does a high AoA generate propeller asymmetry?

In a high angle of attack, the descending propeller blade generates more thrust than the ascending blade causing asymmetry.

What factors lower Vmc?

Increasing aircraft weight and moving the CG forward reduces Vmc, the minimum control speed.

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How do propellers contribute to left turning tendency?

The propellers assymetrical load causes a turning tendency to the left in conventional aircraft.

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What contributes to a high rate of descent during a power reduction on approach?

In a sudden power reduction during approach, reduced induced airflow contributes to a high rate of descent.

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Are there two types of fuel pumps in aircraft?

True. Most aircraft have both engine-driven and electrical boost pumps for fuel pressure.

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What is the recommended take-off speed?

True. The recommended take-off speed is Vmc + 5 knots.

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Should you fly the final approach segment at Vyse or Vmc?

False. Vyse or Vmc should be used to plan the final approach segment, whichever is higher.

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Which engine is critical in a multi-engine aircraft with clockwise propellers?

False. In multi-engine aircraft where both propellers turn clockwise, the left engine is the critical engine.

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What is Vxse?

Vxse is the best angle of climb with one engine inoperative.

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What should pilots monitor during take-off?

During takeoff, pilots monitor engine RPM, manifold pressure, oil temperature and pressure, and flight instruments including airspeed and fuel quantity.

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How can a stabilized approach help during an engine failure?

True. A stabilized approach can help prevent risky engine-out go-arounds.

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What is the recommended procedure for tight turns on the ground?

Power differential is the recommended procedure for tight turns while taxiing on the ground.

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Should an engine failure be considered during every departure?

True. An engine failure should be considered during every departure in a multi-engine airplane.

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What is the speed for best rate of climb in a multi-engine airplane?

Vy, or best rate of climb, is used to determine the best rate of climb for a multi-engine airplane.

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How does density altitude affect the accelerate-stop distance?

False. The ASD is shorter when the density altitude is lower.

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Is the left engine always the critical engine?

False, the critical engine depends on the propeller rotation direction.

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Do propellers cause a turning tendency in aircraft?

True. The asymmetrical load on the propellers tends to make conventional airplanes turn to the left.

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Will the landing gear horn sound if one engine is at idle?

False, the landing gear warning horn sounds if the gear is up and only one engine is at idle.

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What is the single-engine service ceiling determined by?

The single-engine service ceiling is determined by the rate of climb of 50 ft/min.

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Should a feathered propeller be used after an engine failure?

True. If an inoperative engine cannot be restarted, the propeller should be feathered to reduce drag.

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What is the takeoff decision speed (V1)?

V1 is the speed at which the pilot must initiate an aborted takeoff if an engine failure occurs.

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Is a propeller synchronizer used during takeoff?

False. A propeller synchronizer is not used during take-off.

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Should flaps be used during an engine-out approach?

True. Flaps should be avoided during a single-engine approach until the landing is assured to minimize drag.

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What causes the most drag during an engine failure?

A windmilling propeller causes the most drag during an engine failure.

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What happens during a take-off above the single-engine service ceiling with an engine failure?

If a takeoff is initiated above the single-engine service ceiling, an engine failure will result in level flight after take-off.

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What is the absolute ceiling?

Absolute ceiling is the altitude at which Vy and Vx are the same.

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What does a red light on the landing gear indication system mean?

True. A red light on the landing gear indication system means the wheels are in motion, either ascending, descending, or not yet locked.

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How does turbocharging increase service ceiling?

Turbocharging enables a sea level or greater manifold pressure at high altitudes, increasing an airplane's service ceiling.

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Study Notes

Propeller Blade Movement

  • Increasing oil pressure in a propeller hub moves the blades towards low-pitch, high rpm.
  • The recommended bank angle for turns with one inoperative engine is 15 degrees.

Propeller Asymmetry

  • In high angles of attack (AoA) situations, the descending blade of a propeller generates more thrust than the ascending blade due to the differing airflow.

Factors Affecting Vmc

  • Factors that decrease Vmc include increasing weight and a forward center of gravity (CG).

Propeller Asymmetric Load

  • The asymmetrical load of propellers contributes to the left turning tendency in conventional airplanes. This is a true statement.

High Rate of Descent (RoD)

  • A high rate of descent (RoD) is observed in a sudden power reduction during an approach.

Fuel Pumps

  • Two types of fuel pumps exist; engine-driven fuel pumps and electrical boost pumps. This is a true statement.
  • The recommended takeoff speed is Vmc + 5 knots. This is a true statement.

Instrument Approach on One Engine

  • For an instrument approach on one engine, the approach segment should be flown at the lower of Vyse or Vmc.

Critical Engine in Multi-Engine Aircraft

  • The critical engine in multi-engine aircraft configurations with clockwise turning propellers is the right engine. This is false.

Rate of Climb Definition

  • Vyse is the best angle of climb with one engine inoperative (OEI).

Pre-Takeoff Checks

  • During takeoff runs, pilots should monitor rpm, map, oil temperature, and pressure in addition to other factors.

Stabilized Approach

  • Executing a stabilized approach can prevent a risky go-around in the case of an engine failure.

Tight Turn Procedure

  • For tight turns on the ground, a combination of nose wheel turning and brake differential is employed.

Engine Failure Consideration

  • Engine failure must be considered for all departures in multi-engine airplanes. This is a true statement.

Best Rate of Climb Speed

  • The speed for the best rate of climb in a multi-engine aircraft is Vy.

Density Altitude and ASD

  • The longer the Aircraft Stopping Distance (ASD), the lower the density altitude.

Critical Engine in Twin-Engine Aircraft

  • The left engine is not necessarily the critical engine in all twin-engine aircraft. This is false.

Propeller Asymmetric Load and Turn Direction

  • Propeller asymmetry creates a left turn tendency in conventional airplanes. This is a true statement.

Landing Gear Warning Horn

  • The landing gear warning horn will sound if the landing gear is up and only one throttle is reduced to idle. This is false.

Single-Engine Service Ceiling

  • The single-engine service ceiling is determined by the rate of climb of 50 ft/min.

Inoperative Engine and Propeller

  • If an inoperative engine cannot be restarted, the propeller should be feathered to reduce drag. This is a true statement.

Takeoff Decision Speed (V1)

  • V1 is the highest speed at which the pilot must initiate action to stop the aircraft in the event of an aborted takeoff.

Propeller Synchronizer

  • Propeller synchronizers are used during takeoffs to balance rpm between engines - This is false.

OEI Approach and Flaps

  • During an OEI (one engine inoperative) approach, flaps should be operated as little as possible until the landing is assured. This is a true statement.

Engine Failure and Drag

  • Windmilling propellers create significantly more drag during an engine failure than other factors.

Altitude of Takeoff and Engine Failure

  • Initiating takeoff at an altitude greater than the OEI service ceiling results in level flight after take-off.

Vx and Vy Altitude

  • The altitude at which Vx and Vy are the same is the absolute ceiling.

Landing Gear Indication System

  • A red light on the landing gear indication system indicates an issue with the gear (ascending, descending, or unlatched).

Turbocharging and Service Ceiling

  • Turbocharging increases a service ceiling by providing higher air pressures at higher altitudes, more thrust. This is a true statement.

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