NIFE - Engine Review Questions and
Verified Answers | Get it 100% Correct!!
What is the relationship between pressure and velocity? - ✔✔Inversely related
in a closed system. Remember in Engines, Pressure = Static Pressure.
What is Bernoulli's theorum? - ✔✔As any incompressible fluid passes through a
convergent opening its velocity increases and pressure decreases (and vice-
versa)
What happens when subsonic airflow passes through a divergent opening? -
✔✔Velocity decreases, pressure increases
What happens when subsonic airflow passes through a convergent opening? -
✔✔Velocity increases, pressure decreases
What happens when supersonic airflow passes through a divergent opening? -
✔✔Velocity increases, pressure decreases
What happens when supersonic airflow passes through a convergent opening? -
✔✔Velocity decreases, pressure increases
What does a nozzle do? - ✔✔Velocity increases, pressure decreases
What does a diffuser do? - ✔✔Velocity decreases, pressure increases
What is the shape of a supersonic nozzle? - ✔✔Divergent
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©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, What is the shape of a supersonic diffuser? - ✔✔Convergent
What is the shape of a subsonic nozzle? - ✔✔Convergent
What is the shape of a subsonic diffuser? - ✔✔Divergent
What does a gas generator consist of? - ✔✔Compressor, burner, turbine
What are the four stages happening in an engine? - ✔✔Intake, Compression,
Combustion, Exhaust
What is the difference between the Brayton and Otto cycles? - ✔✔Brayton -
simultaneous (gas generator), Otto - sequential (reciprocating)
What are the two types of thrust? - ✔✔Net Thrust, Gross Thrust
What is Net Thrust? - ✔✔Also referred to as 'Thrust.' Net thrust compensates
for inlet airflow velocity under normal flight conditions
What is gross thrust? - ✔✔Gross thrust measured with the engine stationary
(mounted) at standard day temp/pressure
What are the five factors that affect thrust? - ✔✔TAPER - Temperature,
alititude, pressure, Engine RPM, ram effect
What happens to thrust when temperature increases? - ✔✔Thrust decreases
What happens to thrust as altitude increases? - ✔✔Thrust decreases
Page 2 of 14
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Verified Answers | Get it 100% Correct!!
What is the relationship between pressure and velocity? - ✔✔Inversely related
in a closed system. Remember in Engines, Pressure = Static Pressure.
What is Bernoulli's theorum? - ✔✔As any incompressible fluid passes through a
convergent opening its velocity increases and pressure decreases (and vice-
versa)
What happens when subsonic airflow passes through a divergent opening? -
✔✔Velocity decreases, pressure increases
What happens when subsonic airflow passes through a convergent opening? -
✔✔Velocity increases, pressure decreases
What happens when supersonic airflow passes through a divergent opening? -
✔✔Velocity increases, pressure decreases
What happens when supersonic airflow passes through a convergent opening? -
✔✔Velocity decreases, pressure increases
What does a nozzle do? - ✔✔Velocity increases, pressure decreases
What does a diffuser do? - ✔✔Velocity decreases, pressure increases
What is the shape of a supersonic nozzle? - ✔✔Divergent
Page 1 of 14
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, What is the shape of a supersonic diffuser? - ✔✔Convergent
What is the shape of a subsonic nozzle? - ✔✔Convergent
What is the shape of a subsonic diffuser? - ✔✔Divergent
What does a gas generator consist of? - ✔✔Compressor, burner, turbine
What are the four stages happening in an engine? - ✔✔Intake, Compression,
Combustion, Exhaust
What is the difference between the Brayton and Otto cycles? - ✔✔Brayton -
simultaneous (gas generator), Otto - sequential (reciprocating)
What are the two types of thrust? - ✔✔Net Thrust, Gross Thrust
What is Net Thrust? - ✔✔Also referred to as 'Thrust.' Net thrust compensates
for inlet airflow velocity under normal flight conditions
What is gross thrust? - ✔✔Gross thrust measured with the engine stationary
(mounted) at standard day temp/pressure
What are the five factors that affect thrust? - ✔✔TAPER - Temperature,
alititude, pressure, Engine RPM, ram effect
What happens to thrust when temperature increases? - ✔✔Thrust decreases
What happens to thrust as altitude increases? - ✔✔Thrust decreases
Page 2 of 14
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
