COMMERCIAL GROUND FINAL EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
How does the human eye functions differ between day and night? - ANSWER-Cones
are used to see color and detail within the center field of vision and rods are
sensitive to low light and detect movement well in the peripheral field of vision, Night
vision is dependent rods and therefore peripheral vision.
How long is a second class medical valid for a 32 year old private pilot? - ANSWER-
60 Calendar months
Select the response that best describes empty field myopia. - ANSWER-A condition
during flights above clouds or hazy visibilities that causes the eye to relax and lack
focus making it more difficult to see other objects or aircraft.
How does the Unfeathering Accumulator in the Duchess receive its oil charge? -
ANSWER-High pressure oil from the governor boost pump is supplied to the
accumulator while the engine is running and is sealed in the accumulator when the
prop lever is placed in the feather position.
What is the primary purpose of the Bus Tie Fuse in the Duchess electrical system? -
ANSWER-To assist in load sharing and provide a mutual tie to the alternator
systems other than the battery bus.
Lowering the flaps in the Duchess produces the following effects in flight: -
ANSWER-Atitude - Nose down
Airspeed - Reduced
Stall Speed - Lowered
What configuration is required to prime the Duchess engines for starting? -
ANSWER-Master on, Aux pump on, mixture rich, Mag/start switch in BOTH or
START position, Mag/start switch pushed in.
The maximum speed for conducting the Duchess emergency gear extension is: -
ANSWER-100
Pulling the defrost control on in the Duchess supplies airflow to the windscreen even
if the heater is off, as long as the Cabin Air control is open enough to allow airflow. -
ANSWER-True
The Duchess Flap system has split flap protection devices in place. - ANSWER-
False
In the Duchess with the engines running at 2300 RPM, what load capability should
be obtainable on each alternator? - ANSWER-80
, What has happened with the Duchess electrical system if an Overvoltage light is
displayed on the instrument panel? - ANSWER-The Overvoltage Relay has activated
opening the alternator field, which results in a 0% load indication on the respective
load meter.
The Duchess gear warning horn activates when the flaps are lowered beyond [x]
degrees and/or the power is set below that required for [xx]. - ANSWER-16, level
flight
If the left fuel tank contained 80 gallons of fuel and the right fuel tank were empty
due to a leak, what fuel selector configuration will allow both engines to operate on
the fuel remaining in the left tank? - ANSWER-Left fuel selector ON, Right fuel
selector CROSSFEED.
In the duchess by pulling the parking brake handle the brakes are set without having
to pump the brake pedals. - ANSWER-False
Which is true about the safety retraction switch for the Duchess gear system? -
ANSWER-When the airspeed is below the range of 59-63 knots it deactivates the
hydraulic pressure pump electrical circuit.
What is the primary purpose for the Duchess cowl flaps? - ANSWER-To allow the
pilot the ability to control cylinder head temperature.
Conventional twin engine airplanes have greater left turning tendencies than singe
engine airplanes because both engines are creating torque and p-factor that want to
turn the airplane left. - ANSWER-True
Zero degrees sideslip is a condition when... - ANSWER-the longitudinal axis of the
airplane is aligned with the relative wind and the horizontal component of lift created
has an effective force against the operating engine.
Asymmetrical thrust in a conventional twin engine airplane is caused by? -
ANSWER-Anytime thrust output of a powerplant is not equal to the thrust of the
other, inappropriate power application, mechanical failure, or powerpalnt
inefficiencies are all possible examples.
Addition of power at the onset of a stall in a conventional multi engine airplane
creates induced flow over the wings further deepening the stall. - ANSWER-False
Twin engine airplanes with counter rotating propellers have the following effect. -
ANSWER-Elimination of asymmetric thrust and torque with both engines operating.
The four factors that determine a critical engine are torque, p-factor, spiraling
slipstream, and... - ANSWER-Accelerated slipstream (induced flow)
Banking beyond five degrees into the operative engine during engine inoperative
flight has what effect? - ANSWER-An increase in controllability but a decrease in
performance.
QUESTIONS WITH COMPLETE
SOLUTIONS
How does the human eye functions differ between day and night? - ANSWER-Cones
are used to see color and detail within the center field of vision and rods are
sensitive to low light and detect movement well in the peripheral field of vision, Night
vision is dependent rods and therefore peripheral vision.
How long is a second class medical valid for a 32 year old private pilot? - ANSWER-
60 Calendar months
Select the response that best describes empty field myopia. - ANSWER-A condition
during flights above clouds or hazy visibilities that causes the eye to relax and lack
focus making it more difficult to see other objects or aircraft.
How does the Unfeathering Accumulator in the Duchess receive its oil charge? -
ANSWER-High pressure oil from the governor boost pump is supplied to the
accumulator while the engine is running and is sealed in the accumulator when the
prop lever is placed in the feather position.
What is the primary purpose of the Bus Tie Fuse in the Duchess electrical system? -
ANSWER-To assist in load sharing and provide a mutual tie to the alternator
systems other than the battery bus.
Lowering the flaps in the Duchess produces the following effects in flight: -
ANSWER-Atitude - Nose down
Airspeed - Reduced
Stall Speed - Lowered
What configuration is required to prime the Duchess engines for starting? -
ANSWER-Master on, Aux pump on, mixture rich, Mag/start switch in BOTH or
START position, Mag/start switch pushed in.
The maximum speed for conducting the Duchess emergency gear extension is: -
ANSWER-100
Pulling the defrost control on in the Duchess supplies airflow to the windscreen even
if the heater is off, as long as the Cabin Air control is open enough to allow airflow. -
ANSWER-True
The Duchess Flap system has split flap protection devices in place. - ANSWER-
False
In the Duchess with the engines running at 2300 RPM, what load capability should
be obtainable on each alternator? - ANSWER-80
, What has happened with the Duchess electrical system if an Overvoltage light is
displayed on the instrument panel? - ANSWER-The Overvoltage Relay has activated
opening the alternator field, which results in a 0% load indication on the respective
load meter.
The Duchess gear warning horn activates when the flaps are lowered beyond [x]
degrees and/or the power is set below that required for [xx]. - ANSWER-16, level
flight
If the left fuel tank contained 80 gallons of fuel and the right fuel tank were empty
due to a leak, what fuel selector configuration will allow both engines to operate on
the fuel remaining in the left tank? - ANSWER-Left fuel selector ON, Right fuel
selector CROSSFEED.
In the duchess by pulling the parking brake handle the brakes are set without having
to pump the brake pedals. - ANSWER-False
Which is true about the safety retraction switch for the Duchess gear system? -
ANSWER-When the airspeed is below the range of 59-63 knots it deactivates the
hydraulic pressure pump electrical circuit.
What is the primary purpose for the Duchess cowl flaps? - ANSWER-To allow the
pilot the ability to control cylinder head temperature.
Conventional twin engine airplanes have greater left turning tendencies than singe
engine airplanes because both engines are creating torque and p-factor that want to
turn the airplane left. - ANSWER-True
Zero degrees sideslip is a condition when... - ANSWER-the longitudinal axis of the
airplane is aligned with the relative wind and the horizontal component of lift created
has an effective force against the operating engine.
Asymmetrical thrust in a conventional twin engine airplane is caused by? -
ANSWER-Anytime thrust output of a powerplant is not equal to the thrust of the
other, inappropriate power application, mechanical failure, or powerpalnt
inefficiencies are all possible examples.
Addition of power at the onset of a stall in a conventional multi engine airplane
creates induced flow over the wings further deepening the stall. - ANSWER-False
Twin engine airplanes with counter rotating propellers have the following effect. -
ANSWER-Elimination of asymmetric thrust and torque with both engines operating.
The four factors that determine a critical engine are torque, p-factor, spiraling
slipstream, and... - ANSWER-Accelerated slipstream (induced flow)
Banking beyond five degrees into the operative engine during engine inoperative
flight has what effect? - ANSWER-An increase in controllability but a decrease in
performance.
