NIFE ENGINES QUESTIONS WITH 100% CORRECT ANSWERS 2024 EXAM
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Course
NIFE ENGINES
Institution
NIFE ENGINES
NIFE ENGINES QUESTIONS WITH 100% CORRECT
ANSWERS 2024 EXAM
What is Bernoulli's theorem RIGHT ANS>>- Any incompressible fluid that passes through a convergent
opening, velocity increase, pressure decreases
What is Bernoulli's Equation RIGHT ANS>>- Pt=Ps+Pk
Which type of air is compr...
What is gross thrust? RIGHT ANS>>- Thrust solely from the velocity of the exhaust gases (ignores inlet)
atstandard day conditions (29.92 in/Hg and 15C)
What is net thrust and its equation? RIGHT ANS>>- Thrust that corrects for the inlet air.
Net Thrust=m*(Vf-Vi)/t
What is the thrust equation? RIGHT ANS>>- T=m*a
Explain the RAM effect in a gas turbine engine RIGHT ANS>>- As the aircraft goes faster, more and
more airis being rammed into the inlet. This increases the mass and pressure of the inlet air causing
better engine performance.
What are the cockpit thrust measuring devices? RIGHT ANS>>- EPR (Engine Pressure Ratio) gauge,
Torquemeter, and Tachometer
What is a EPR? RIGHT ANS>>- Engine pressure ratio. It measures the pressure ratio between the inlet
andexhaust airflow
, What is a torquemeter and what type of aircraft use it? RIGHT ANS>>- Indicated shaft horsepower
available to drive the rotor or prop. Aircrafts that have rotors or props.
What is a Tachometer? What is it measured in? RIGHT ANS>>- Gauge used to measure engine
performance/ speed. Measured in percent RPM
What is the purpose of an inlet duct? What is it designed to act like (nozzle or diffuser)? RIGHT
ANS>>- Provides the proper amount of high pressure, turbulence free air that is steady and uniform
to thefirst stage of the compressor. Diffuser.
What shape is the inlet of a subsonic aircraft? RIGHT ANS>>- Diverging shape
What shape is the inlet of a supersonic aircraft? RIGHT ANS>>- Converging-diverging
What is a variable geometry inlet duct and how does it work? RIGHT ANS>>- An inlet duct that uses
mechanical devices such as ramps, wedges, or cones that change the shape of the inlet duct as speed
goes between subsonic and supersonic.
What is the purpose of a compressor? RIGHT ANS>>- To supply enough air to satisfy the
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