USCG USCG Steam
Set 5 • Question #372 of 496
Launch Interactive Practice Room function the nozzle assembly performs in an impulse turbine?
A
Converts the steam's thermal energy into kinetic energy by increasing its velocity and directing it against the rotor blades.
✓ Correct Answer
B
Provides an area where the steam is prevented from expanding prior to being directed against the rotor blades.
C
Increases the velocity of the steam without a pressure drop across the diaphragm.
D
Converts the potential energy of steam into thermal energy by increasing its pressure and directing it against the turbine blades.
USCG NMC Regulatory Explanation
In an impulse turbine stage (Curtis / Rateau), steam pressure drops exclusively across stationary nozzles, converting pressure into high-velocity kinetic jets that drive the moving blades without pressure drop across the blades.
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