1. The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
2. The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
3. The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
4. In a nozzle, whole frictional loss is assumed to occur between
5. The critical pressure ratio for initially wet steam is
6. The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
7. The impulse reaction turbine has its driving force
8. The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
9. A regenerative steam cycle renders
10. De-Laval turbine is a
11. The turbine, in which the general direction of the steam flow is parallel to the turbine axis, is called axial flow turbines
12. The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
13. The reheat factor is the ratio of the
14. The turbine blades do not change the direction of steam issuing from the nozzle.
15. Thermal equilibrium means that the flow of steam is
16. When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
17. The ratio of the workdone on the blades to the energy supplied to the blades, is called
18. The discharge is __________ at critical pressure.
19. The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop
20. The steam leaves the nozzle at a
21. The critical pressure gives the velocity of steam at the throat
22. The Parsons' reaction turbine has
23. The action of steam in a steam turbine is
24. The blade velocity coefficient is ratio of relative velocity of steam at outlet tip of the blade to the relative velocity of steam at inlet tip of the blade.