Steam condenser
Steam boiler
Steam preheater
Economiser
Maximum
Minimum
Zero
Depends on temperature also
Vb = 0.5 V cosα
Vb = V cos α
Vb = 0.5 V² cosα
Vb = V² cosα
10 atmospheres
20 atmospheres
30 atmospheres
40 atmospheres
The expansion of steam in a nozzle follows Rankine cycle.
The friction in the nozzle increases the dryness fraction of steam.
The pressure of steam at throat is called critical pressure.
All of the above
0.2 to 0.5
0.5 to 0.65
0.65 to 0.9
0.8 to 1.2
Equal to Carnot cycle
Less than Carnot cycle
More than Carnot cycle
Could be anything
Internally fired
Externally fired
Internally as well as externally fired
None of these
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
Less efficient and less economical
Less efficient and more economical
More efficient and less economical
More efficient and more economical
Increases the mean effective pressure
Increases the workdone
Decreases the efficiency of the engine
All of these
Swept volume to the volume at cut-off
Volume at cut-off to the clearance volume
Volume at cut-off to the swept volume
Clearance volume to the volume at cut-off
21 %
23 %
30 %
40 %
Former is fire tube type and latter is water tube type boiler
Former is water tube type and latter is fire tube type
Former contains one fire tube and latter contains two fire tubes
None/of the above
Flue gases pass through tubes and water around it
Water passes through the tubes and flue gases around it
Forced circulation takes place
Tubes are laid vertically
12 m
1.52.5 m
23 m
2.53.5 m
Has no effect on
Decreases
Increases
None of these
Feed pump
Injector
Feed check valve
Pressure gauge
Temperature, time, and turbulence
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature
Total air, time, and temperature
Minimum
Maximum
Zero
None of these
2 cm
6 cm
8 cm
12 cm
Supply of excess, air
Supply of excess coal
Burning CO and unburnts in upper zone of furnace by supplying more air
Fuel bed firing
Vertical fire tube type
Horizontal fire tube type
Horizontal water tube type
Forced circulation type
Increases
Decreases
Remains constant
None of these
Indicated power
Brake power
Frictional power
None of these
kg of steam produced
Steam pressure produced
kg of fuel fired
kg of steam produced per kg of fuel fifed
Same
More
Less
Less or more depending on size of boiler
Static
Dynamic
Static and dynamic
Neither static nor dynamic
Indicated power
Brake power
Frictional power
None of these
Blading efficiency
Nozzle efficiency
Stage efficiency
Mechanical efficiency