In jet propulsion, which component accelerates gas to produce thrust by expelling it through an opening?

In jet propulsion, which component accelerates gas to produce thrust by expelling it through an opening?

• A. Inlet duct
• B. Jet nozzle
• C. Compressor
• D. Fuel injector

Answer: (B)

The jet nozzle is the component that accelerates the exhaust gas and expels it through an opening to produce thrust. After combustion increases the gas’s energy, the nozzle shapes and directs the flow, converting pressure energy into high-velocity jet thrust as the gas exits the engine. The inlet duct merely guides air into the engine; the compressor raises air pressure but does not expel the gas to create thrust; the fuel injector provides fuel for combustion but doesn’t accelerate the exhaust flow by itself.

The jet nozzle is the component that accelerates the exhaust gas and expels it through an opening to produce thrust. After combustion increases the gas’s energy, the nozzle shapes and directs the flow, converting pressure energy into high-velocity jet thrust as the gas exits the engine. The inlet duct merely guides air into the engine; the compressor raises air pressure but does not expel the gas to create thrust; the fuel injector provides fuel for combustion but doesn’t accelerate the exhaust flow by itself.