Unburnt carbon in ash
Incomplete combustion
Ash content
Flue gases
D. Flue gases
Same
More
Less
Less or more depending on size of boiler
pa = pm/K
pa = pm × K
pa = K/pm
pa = pm + K
Decrease dryness fraction of steam
Decrease specific volume of steam
Increase the entropy
Increase the heat drop
Higher calorific value at constant volume
Lower calorific value at constant volume
Higher calorific value at constant pressure
Lower calorific value at constant pressure
Has high heating value
Retards electric precipitation
Promotes complete combustion
Has highly corrosive effect
Zero
One
Two
Four
To provide proper conditions for continuous complete combustion
Mix fuel with air and ignite
Separate ash from coal
Maintain heat supply to prepare and ignite the incoming fuel
Drooping characteristic
Linear characteristic
Rising characteristic
Flat characteristic
Mass of the steam discharged increases
Entropy and specific volume of the steam increases
Exit velocity of steam reduces
All of these
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency
Horizontal
Vertical
Inclined
Horizontal and inclined
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
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
Remain same
Increases
Decreases
Behaves unpredictably
Low
Very low
High
Very high
The steam is admitted on one side of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and one working stroke is produced during each revolution of the crankshaft
The steam is admitted on one side of the piston and two working strokes are produced during each revolution of the crankshaft
The steam is admitted, in turn, on both sides of the piston and two working strokes are produced during each revolution of the crankshaft
Equal to
Less than
Higher than
None of these
Wet steam
Dry saturated steam
Superheated steam
None of these
Maintain the speed of the turbine
Reduce the effective heat drop
Reheat the steam and improve its quality
Completely balance against end thrust
1.05
2.86
6.65
10.05
Condenser efficiency
Nozzle efficiency
Boiler efficiency
Vacuum efficiency
Give maximum space
Give maximum strength
Withstand pressure inside boiler
Resist intense heat in fire box
1 kg/cm²
5 kg/cm²
10 kg/cm²
18 kg/cm²
Velocity increases
Velocity decreases
Velocity remains constant
Pressure remains constant
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Increases
Decreases
Remain unaffected
First increases and then decreases
Does not change
Increases
Decreases
None of these
Piston rod
Connecting rod
Eccentric rod
Valve rod
Bleeding
Reheating
Governing
None of these
Convection
Radiation
Conduction
Radiation and conduction