Fixed blades
Moving blades
Both fixed and moving blades
None of these
C. Both fixed and moving blades
Reheat factor
Stage efficiency
Internal efficiency
Rankine efficiency
More
Less
Equal
May be more or less depending on capacity of reheater
373°K
273.16°K
303°K
0°K
Blow off cock
Feed check valve
Economiser
Fusible plug
Does not change
Increases
Decreases
None of these
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Equals that of the surroundings
Equals 760 mm of mercury
Equals to atmospheric pressure
Equals the pressure of water in the container
Increases the workdone through the turbine
Increases the efficiency of the turbine
Reduces wear on the blades
All of these
High burning rate is possible
Heat release can be easily controlled
Fuel burns economically
It is the best technique for burning high ash content fuel having low fusion ash
1 kg/cm
6 kg/cm
17 kg/cm²
100 kg/cm²
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
Entropy
Enthalpy
Pressure
Temperature
Remain same
Increases
Decreases
Behaves unpredictably
Vb = 0.5 V cosα
Vb = V cos α
Vb = 0.5 V² cosα
Vb = V² cosα
Wet
Superheated
Remain dry saturated
Dry
Steam turbine
Steam condenser
Mercury boiler
All of these
Inlet and throat
Inlet and outlet
Throat and exit
All of these
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Cool the scanners
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone.
Heat energy of steam into kinetic energy
Kinetic energy into heat energy of steam
Heat energy of steam into potential energy
Potential energy into heat energy of steam
Maximum
Minimum
Zero
Depends on temperature also
Regenerative heating
Reheating of steam
Bleeding
None of these
Cumulative heat drop to the isentropic heat drop
Isentropic heat drop to the heat supplied
Total useful heat drop to the total isentropic heat drop
None of the above
Internally fired
Externally fired
Internally as well as externally fired
None of these
Boiler effectiveness
Boiler evaporative capacity
Factor of evaporation
Boiler efficiency
(h - hf1)/2257
(h + hf1)/2257
(h × hf1)/2257
None of these
Carbon, hydrogen, nitrogen, sulphur, moisture
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Lower calorific value
One-half the height of chimney
Equal to the height of chimney
Two times the height of chimney
Four times the height of chimney
Increases
Decreases
Does not effect
None of these
One-half
One-third
Two-fourth
Two-fifth
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