USCG USCG Steam
Set 12 • Question #96 of 496
Launch Interactive Practice Room What happens to the steam as it moves across the moving blades in a reaction turbine?
A
It gains velocity at constant pressure.
B
It creates an axial thrust in the direction of the steam flow.
✓ Correct Answer
C
It loses velocity at constant pressure.
D
It creates an axial thrust opposing the direction of steam flow.
USCG NMC Regulatory Explanation
In a reaction turbine stage (Parsons), steam expands and drops in pressure across both stationary guide vanes and moving rotor blades, producing force through impulse and reactive acceleration.
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