CASA ATPL - AASA GAS TURBINE
ENGINES EXAM 2025 |
GUARANTEED ACCURATE
ANSWERS
RAM effect
a. has a negligible effect on the efficiency of a jet engine as aircraft
speed varies
b. lowers the efficiency of a jet engine as aircraft speed increases
c. raises the thrust output of a jet engine as aircraft speed increases
d. cools the air as it enters the intakes - ACCURATE ANSWERS✔✔ C
Faster the aircraft goes the more air is getting forced into ram intake
A turbofan is not as efficient as a turboprop at low speeds. This is
because the turbofan causes
a. lower air mass to be accelerated to a lower velocity
b. higher air mass to be accelerated to a higher velocity
c. lower air mass to be accelerated to a higher velocity
d. higher air mass to be accelerated to a lower velocity - ACCURATE
ANSWERS✔✔ Answer C
,small mass = large acceleration
Boyles Law states that;
a) The pressure of a gas at a constant volume is directly proportional to
its surface area.
b) The volume of a gas at a constant temperature is inversely
proportional to its pressure.
c) The temperature of a gas at a constant velocity is indirectly
proportional to square root of its volume.
d) When an airstream flows through a venturi, velocity increases and
pressure decreases at the venturi throat. - ACCURATE ANSWERS✔✔
Answer B
Burning of fuel in the combustion chambers
a. will raise the pressure of the gases
b. will decrease the velocity of the gases
c. will decrease the volume of the gases
d. will increase the volume of the gases - ACCURATE ANSWERS✔✔
D
,1. Subsonic gas flow decreases in velocity and increases in pressure
when flowing through -
a. a convergent duct
b. a divergent duct
c. a parallel duct
d. a helical duct - ACCURATE ANSWERS✔✔ B
All airflow must be subsonic
Newtons 3 Laws of Motion - ACCURATE ANSWERS✔✔ 1. Law of
Inertia
2. Law of Acceleration (Momentum)
3. Law of Action-Reaction
Newton's 1st Law of Motion - ACCURATE ANSWERS✔✔ The Law of
Inertia:
Objects in motion stay in motion, objects at rest stay at rest unless acted
on by an outside force
Newton's 2nd Law of Motion - ACCURATE ANSWERS✔✔ The Law
of Momentum
The acceleration of an object as produced by a net force is directly
proportional to the magnitude of the net force, in the same direction as
the net force, and inversely proportional to the mass of the object.
, F = MA
Newton's Third Law - ACCURATE ANSWERS✔✔ The Law of
Reaction:
For every action there is an equal and opposite reaction
Newtons Lawand thrust formula - ACCURATE ANSWERS✔✔ T =
W(V2-V1)
T = thrust
W = Mass (weight)
V2 = velocity of air leaving the engine
V1 = Velocity of air entering the engine
Momentum drag - ACCURATE ANSWERS✔✔ Drag induced by the
engine intake when slowing the airflow down
RAM recovery - ACCURATE ANSWERS✔✔ The function of the air
inlet duct, which is to deliver available ram air pressure to the
compressor inlet of a gas turbine engine.
aircraft velocity increases the static pressure in the intake also increases
and offsets this drag
ENGINES EXAM 2025 |
GUARANTEED ACCURATE
ANSWERS
RAM effect
a. has a negligible effect on the efficiency of a jet engine as aircraft
speed varies
b. lowers the efficiency of a jet engine as aircraft speed increases
c. raises the thrust output of a jet engine as aircraft speed increases
d. cools the air as it enters the intakes - ACCURATE ANSWERS✔✔ C
Faster the aircraft goes the more air is getting forced into ram intake
A turbofan is not as efficient as a turboprop at low speeds. This is
because the turbofan causes
a. lower air mass to be accelerated to a lower velocity
b. higher air mass to be accelerated to a higher velocity
c. lower air mass to be accelerated to a higher velocity
d. higher air mass to be accelerated to a lower velocity - ACCURATE
ANSWERS✔✔ Answer C
,small mass = large acceleration
Boyles Law states that;
a) The pressure of a gas at a constant volume is directly proportional to
its surface area.
b) The volume of a gas at a constant temperature is inversely
proportional to its pressure.
c) The temperature of a gas at a constant velocity is indirectly
proportional to square root of its volume.
d) When an airstream flows through a venturi, velocity increases and
pressure decreases at the venturi throat. - ACCURATE ANSWERS✔✔
Answer B
Burning of fuel in the combustion chambers
a. will raise the pressure of the gases
b. will decrease the velocity of the gases
c. will decrease the volume of the gases
d. will increase the volume of the gases - ACCURATE ANSWERS✔✔
D
,1. Subsonic gas flow decreases in velocity and increases in pressure
when flowing through -
a. a convergent duct
b. a divergent duct
c. a parallel duct
d. a helical duct - ACCURATE ANSWERS✔✔ B
All airflow must be subsonic
Newtons 3 Laws of Motion - ACCURATE ANSWERS✔✔ 1. Law of
Inertia
2. Law of Acceleration (Momentum)
3. Law of Action-Reaction
Newton's 1st Law of Motion - ACCURATE ANSWERS✔✔ The Law of
Inertia:
Objects in motion stay in motion, objects at rest stay at rest unless acted
on by an outside force
Newton's 2nd Law of Motion - ACCURATE ANSWERS✔✔ The Law
of Momentum
The acceleration of an object as produced by a net force is directly
proportional to the magnitude of the net force, in the same direction as
the net force, and inversely proportional to the mass of the object.
, F = MA
Newton's Third Law - ACCURATE ANSWERS✔✔ The Law of
Reaction:
For every action there is an equal and opposite reaction
Newtons Lawand thrust formula - ACCURATE ANSWERS✔✔ T =
W(V2-V1)
T = thrust
W = Mass (weight)
V2 = velocity of air leaving the engine
V1 = Velocity of air entering the engine
Momentum drag - ACCURATE ANSWERS✔✔ Drag induced by the
engine intake when slowing the airflow down
RAM recovery - ACCURATE ANSWERS✔✔ The function of the air
inlet duct, which is to deliver available ram air pressure to the
compressor inlet of a gas turbine engine.
aircraft velocity increases the static pressure in the intake also increases
and offsets this drag
