15 %
20 %
30 %
45 %
C. 30 %
Increases
Decreases
Remains constant
None of these
Increases steam pressure
Increases steam flow
Decreases fuel consumption
Decreases steam pressure
0.546
0.577
0.582
0.601
There is a pressure drop in the nozzle
Fluid flows through the nozzle
Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
Approach temperature should be as low as possible
Handling and maintenance should be easier
Heat transfer area should be optimum
Stack gases should not be cooled to the dew point
To convert reciprocating motion of the piston into rotary motion
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To prevent fluctuation of speed
To keep the engine speed uniform at all load conditions
Steam evaporation rate per kg of fuel fired
Work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
The evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
Work done by 1 kg of steam at saturation condition
Higher calorific value at constant volume
Lower calorific value at constant volume
Higher calorific value at constant pressure
Lower calorific value at constant pressure
Economiser
Fusible plug
Superheater
Stop valve
2 cm
6 cm
8 cm
12 cm
1 m
2 m
3 m
4 m
Work done during the Rankine cycle
Work done during compression
Work done during adiabatic expansion
Change in enthalpy
Water passes through the tubes which are surrounded by flames and hot gases
The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
None of these
At the entrance to the nozzle
At the throat of the nozzle
In the convergent portion of the nozzle
In the divergent portion of the nozzle
Area of the actual indicator diagram to the area of theoretical indicator diagram
Actual workdone per stroke to the theoretical workdone per stroke
Actual mean effective pressure to the theoretical mean effective pressure
Any one of the above
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
None of the above
Increases the mean effective pressure
Increases the workdone
Decreases the efficiency of the engine
All of these
Babcock and Wilcox
Locomotive
Lancashire
Cochran
0.007 bar
0.053 bar
0.06 bar
0.067 bar
One
Two
Three
Four
75
115
165
225
Equal to the velocity of sound
Less than the velocity of sound
More than the velocity of sound
None of these
Volume
Pressure
Entropy
Enthalpy
30 MW
60 MW
100 MW
500 MW
Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
Feed pump is employed to supplement natural circulation in water wall type furnace
Water is converted into steam in one pass without any recirculation
Enthalpy
Superheating
Super saturation
Latent heat
1 m
1.5 m
2 m
2.5 m
Steam boiler
Steam turbine
Steam condenser
Steam injector
Atmospheric temperature
500-600°C
700-850°C
950-1100°C
Stationary fire tube boiler
Stationary water tube boiler
Water tube boiler with natural/forced circulation
Mobile fire tube boiler