Boiler efficiency, turbine efficiency, generator efficiency
All the three above plus gas cycle efficiency
Carnot cycle efficiency
Regenerative cycle efficiency
A. Boiler efficiency, turbine efficiency, generator efficiency
One-fourth
One-third
Two-fifth
One-half
Water space also
Chimney
Steam space
Superheater
Dry
Wet
Saturated
Supersaturated
Low
Very low
High
Very high
180° to each other
90° to each other
0° to each other
None of these
10 atmospheres
20 atmospheres
30 atmospheres
40 atmospheres
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Air delivered by forced draft fan
0.5 to 10 MN/m²
1 to 15 MN/m²
2.5 to 15 MN/m²
3.5 to 20 MN/m²
Pulverising coal in inert atmosphere
Heating wood in a limited supply of air at temperatures below 300°C
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Binding the pulverised coal into briquettes
More
Less
Same
None of these
Receiver type compound engine
Tandem type compound engine
Woolf type compound engine
Both (A) and (B)
Supply of excess, air
Supply of excess coal
Burning CO and unburnts in upper zone of furnace by supplying more air
Fuel bed firing
Does not change
Increases
Decreases
None of these
ps - pa
pa - ps
pa + ps
None of these
Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these
Increases steam pressure
Increases steam flow
Decreases fuel consumption
Decreases steam pressure
Complete account of heat supplied by 1 kg of dry fuel and the heat consumed
Moisture present in the fuel
Steam formed by combustion of hydrogen per kg of fuel
All of the above
Zero
Minimum
Maximum
None of these
Horizontal
Vertical
Inclined
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
Cement industry
Thermal power plant
Blast furnace
Domestic use
10 to 15 %
15 to 25 %
25 to 40 %
40 to 60 %
The power required and working pressure
The geographical position of the power house
The fuel and water available
All of the above
Internally fired
Externally fired
Internally as well as externally fired
None of these
24 m
35 m
57.5 m
79 m
Horizontal
Vertical
Inclined
None of these
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
Steam pressure exceeds the working pressure
Water level in the boiler becomes too low
Both (A) and (B)
None of the above
Absolute velocity at the inlet of moving blade is equal to that at the outlet
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 equal to that at the outlet
One-half
One-third
Two-fourth
Two-fifth