Foxoyo
Hey..!!
Steam Nozzles and Turbines
Practice
MCQs
Quizzes
About
Leaderboard
Amazon Books
91
MCQs
0
Attempts
0 %
Accuracy
share
Filter by
Type here
Apply
A binary vapour plant consists of
mercury boiler
steam condenser
Steam turbine
All of These
The purpose of governing in steam turbines is to
completely balance against end thrust
reheat the steam and improve its quality
maintain the speed of the turbine
reduce the effective heat drop
In a nozzle, the effect of supersaturation is to
decrease specific volume of steam
increase the entropy
increase the heat drop
decrease dryness fraction of steam
A regenerative steam cycle renders
decreased work output per unit mass of steam
increased thermal efficiency
increased work output per unit mass of steam
decreased work output per unit mass of steam as well as increased thermal efficiency
The value of the reheat factor varies from
1.02 to 1.06
1.6 to 2
1.08 to 1.l0
1.2 to 1.6
Reheating of steam in a turbine
increases the workdone through the turbine
All of These
reduces wear on the blades
increases the efficiency of the turbine
Thermal equilibrium means that the flow of steam is
Hyperbolic
Isothermal
polytropic
isentropic
The reheat factor depends upon
turbine stage efficiency
initial pressure and superheat
exit pressure
All of These
The effect of supersaturation is that the
All of These
mass of the steam discharged increases
exit velocity of steam reduces
entropy and specific volume of the steam increases
The expansion of steam in a nozzle follows
Stirling cycle
Carnot cycle
Rankine cycle
Joule cycle
Parson's reaction turbine is a __________ reaction turbine
70 percent
50 percent
60 percent
40 percent
The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of aturbine.
The degree of reaction will be
0.56
0.4
0.67
1.67
The density of supersaturated steam is about __________ that of the ordinary saturated vapour at the corresponding pressure
4 times
8 times
2 times
same as
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
low pressure turbine
pass out turbine
back pressure turbine
impulse turbine
The Parsons' reaction turbine has
fixed and moving blades of different shape
identical fixed and moving blades
only fixed blades
only moving blades
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
pressure remains constant
velocity increases
velocity decreases
velocity remains constant
The critical pressure ratio for initially dry saturated steam is
0.546
0.582
0.577
0.601
The efficiency of steam turbines may be improved by
binary vapour plant
regenerative feed heating
reheating of steam
any one of these
In an ideal impulse turbine, the
relative velocity at the inlet of the moving blade is equal to that at the outlet
axial velocity at inlet is equal to that at the outlet
whirl velocity at inlet is equalto that at the outlet
absolute velocity at the inlet of moving blade is equal to that at the outlet
The action of steam in a steam turbine is
static
neither static nor dynamic
Dynamic
static and dynamic
1
2
3
5
Next
take a quick Quiz
Practice mcqs on Steam Nozzles and Turbines
Let's start
pick difficulty level
all
1
2
3
4
5
91
Mcqs
0
attempts
1
followers
Related Topics
Steam Nozzles and Turbines
Steam Boilers and Engines
Compressors Gas Dynamics and Gas Turbines
Python Classes and Objects Inheritance and Excepti
R Programming R Nuts and Bolts and Getting Data I
Electrons And Dual Nature Of Matter And Radiations
Ratio and Propotions
States and Capitals
Permutation and Combination
Books and Authors
Suggested Books