2025 CPAER GENERAL KNOWLEDGE ALL QUESTIONS WITH
ANSWERS GUARANTEE A+ 2025/2026
Ground effect is most noticeable in (low/high) wing planes with (high/low) aspect ratio -
Low, high
Dihedral is (upward/downward) angle of the wing - Upward
Dihedral affects - Lateral stability
Load factor in a turn: - 0º = 1g
15º = 1.04g
30º = 1.15g
45º = 1.41g
60º = 2.0g
75º = 3.9g
Stalling is dependent on only - Angle of attack
Valve overlap - The period in which both inlet and exhaust valves are open
Oil Viscosity, the higher the viscosity, the ___ the rating - Higher
In summer ___ viscosity oil would be used, in winter ___ viscosity oil would be used -
High, low
What is the purpose of winglets? - Reduce drag and turbulence at wingtip
Winglets reduce drag significantly during - Climb, cruise, and high altitude
The purpose of stall strips is to - Cause the wing root to stall before the wingtip
With a variable pitch propeller, ___ pitch is used for climb, ___ pitch is used for cruise -
Fine, coarse
Does a pilot control prop pitch in a variable speed propeller? - No, the governor which is
tied to RPM controls prop pitch
A small aircraft is more economical at altitude due to - Decreased air density, resulting
in reduced profile drag
Angle of attack is defined as - The angle between the chord of the wing and the relative
airflow
What is a constant speed propeller? - A prop that automatically adjusts its pitch to
maintain the same rotation speed during a climb, descent, or level flight
, Loss of oil pressure in a (single engine) constant speed prop results in - Prop blades to
move to full fine (max RPM) position
An a/c with a forward c of g will cruise (faster/slower) than an a/c with a rearward c of g -
Slower
Angle of incidence is defined as - The angle between the chord of the wing and the
longitudinal axis of the a/c
Aspect ratio is the ratio of - A wing's span to mean chord
What wing shape would be considered to have a high aspect ratio? - Long, narrow wing
High aspect ratio wings are generally more ___ as they produce less ___ - Efficient,
drag
What instruments are powered by the vacuum? - Heading, attitude
The turn+bank indicator/turn coordinator is ___ driven - Electrically
In a light twin, left engine loss is most critical because - Yaw becomes more severe and
performance drop off is steep
Bypass ratio is - Air that flows around the engine **to** air which passes through the
combustion chamber
Magnetic compass errors (east and west) - Accelerating on E or W gives northerly
turning error
Decelerating on E or W gives southerly turning error
ANDS
__% of energy available coming from turbojet combustion, is needed to drive the
compressor - 85
Control surfaces that are not balanced correctly can - Flutter and break
Cold soaking is when - Fuel in a wing is very cold, and chills the wing surface enough
that any moisture can turn to frost or ice
The attitude indicator's gyroscope has its axis aligned - Vertically
The heading indicator's gyroscope has its axis of rotation in the - Horizontal plane
Magnetic compass errors (north+south) - Turns to the south compass will
Advance
Turns to the north compass will
ANSWERS GUARANTEE A+ 2025/2026
Ground effect is most noticeable in (low/high) wing planes with (high/low) aspect ratio -
Low, high
Dihedral is (upward/downward) angle of the wing - Upward
Dihedral affects - Lateral stability
Load factor in a turn: - 0º = 1g
15º = 1.04g
30º = 1.15g
45º = 1.41g
60º = 2.0g
75º = 3.9g
Stalling is dependent on only - Angle of attack
Valve overlap - The period in which both inlet and exhaust valves are open
Oil Viscosity, the higher the viscosity, the ___ the rating - Higher
In summer ___ viscosity oil would be used, in winter ___ viscosity oil would be used -
High, low
What is the purpose of winglets? - Reduce drag and turbulence at wingtip
Winglets reduce drag significantly during - Climb, cruise, and high altitude
The purpose of stall strips is to - Cause the wing root to stall before the wingtip
With a variable pitch propeller, ___ pitch is used for climb, ___ pitch is used for cruise -
Fine, coarse
Does a pilot control prop pitch in a variable speed propeller? - No, the governor which is
tied to RPM controls prop pitch
A small aircraft is more economical at altitude due to - Decreased air density, resulting
in reduced profile drag
Angle of attack is defined as - The angle between the chord of the wing and the relative
airflow
What is a constant speed propeller? - A prop that automatically adjusts its pitch to
maintain the same rotation speed during a climb, descent, or level flight
, Loss of oil pressure in a (single engine) constant speed prop results in - Prop blades to
move to full fine (max RPM) position
An a/c with a forward c of g will cruise (faster/slower) than an a/c with a rearward c of g -
Slower
Angle of incidence is defined as - The angle between the chord of the wing and the
longitudinal axis of the a/c
Aspect ratio is the ratio of - A wing's span to mean chord
What wing shape would be considered to have a high aspect ratio? - Long, narrow wing
High aspect ratio wings are generally more ___ as they produce less ___ - Efficient,
drag
What instruments are powered by the vacuum? - Heading, attitude
The turn+bank indicator/turn coordinator is ___ driven - Electrically
In a light twin, left engine loss is most critical because - Yaw becomes more severe and
performance drop off is steep
Bypass ratio is - Air that flows around the engine **to** air which passes through the
combustion chamber
Magnetic compass errors (east and west) - Accelerating on E or W gives northerly
turning error
Decelerating on E or W gives southerly turning error
ANDS
__% of energy available coming from turbojet combustion, is needed to drive the
compressor - 85
Control surfaces that are not balanced correctly can - Flutter and break
Cold soaking is when - Fuel in a wing is very cold, and chills the wing surface enough
that any moisture can turn to frost or ice
The attitude indicator's gyroscope has its axis aligned - Vertically
The heading indicator's gyroscope has its axis of rotation in the - Horizontal plane
Magnetic compass errors (north+south) - Turns to the south compass will
Advance
Turns to the north compass will
