Mechanical Engineering - Steam Nozzles and Turbines

Exercise : Steam Nozzles and Turbines - Section 1
11.
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
0.4
0.56
0.67
1.67
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
The impulse reaction turbine has its driving force
as an impulsive force
as a reaction force
partly as an impulsive force and partly as a reaction force
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

13.
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
Vb = 0.5 V cos α
Vb = V cos α
Vb = 0.5 V2 cos α
Vb = V2 cos α
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
A regenerative steam cycle renders
increased work output per unit mass of steam
decreased work output per unit mass of steam
increased thermal efficiency
decreased work output per unit mass of steam as well as increased thermal efficiency
Answer: Option
Explanation:
No answer description is available. Let's discuss.

15.
De-Laval turbine is a
single rotor impulse turbine
multi-rotor impulse turbine
impulse reaction turbine
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.