Evaporative capacity of a boiler
Equivalent evaporation from and at 100° C
Boiler efficiency
None of these
A. Evaporative capacity of a boiler
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
Lowers the boiling point of a liquid
Raises the boiling point of a liquid
Does not affects the boiling point of a liquid
Reduces its volume
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
10 atmospheres
20 atmospheres
30 atmospheres
40 atmospheres
Pressure drop across the rotor
Change in axial velocity
Both (A) and (B)
None of these
More
Less
Same
Could be more or less depending on other factors
To determine the generating capacity of the boiler
To determine the thermal efficiency of the boiler when working at a definite pressure
To prepare heat balance sheet for the boiler
All of the above
Carnot cycle
Rankine cycle
Joule cycle
Stirling cycle
There is no pressure drop due to condensation
Steam is admitted at boiler pressure and exhausted at condenser pressure
The expansion (or compression) of the steam is hyperbolic
All of the above
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
Convection
Radiation
Conduction
Radiation and conduction
Reduce hardness and for removal of solids
Increase efficiency of thermal power plant
Increase heat transfer rate
Increase steam parameters
Chimney
Centrifugal fan
Steam jet
None of these
Stationary < fire tube type
Horizontal type
Natural circulation type
All of the above
High pressure and a low velocity
High pressure and a high velocity
Low pressure and a low velocity
Low pressure and a high velocity
Heating the oil in the settling tanks
Cooling the oil in the settling tanks
Burning the oil
Suspension
Swept volume to the volume at cut-off
Clearance volume to the swept volume
Volume at cut-off to the swept volume
Swept volume to the clearance volume
Clearance volume to the swept volume
Clearance volume to the volume at cut-off
Volume at cut-off to the swept volume
Swept volume to the clearance volume
To guide motion of the piston rod and to prevent it from bending
To transfer motion from the piston to the crosshead
To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
None of these
Regenerative heating
Reheating of steam
Bleeding
None of these
Has no effect on
Decreases
Increases
None of these
1 to 2 m
1.25 to 2.25 m
1.5 to 2.5 m
1.75 to 2.75 m
Higher calorific value at constant volume
Lower calorific value at constant volume
Higher calorific value at constant pressure
Lower calorific value at constant pressure
Horizontal
Vertical
Inclined
None of these
Heat transfer takes place across cylinder walls
Work is done
Steam may be wet, dry or superheated after expansion
All of the above
Stage efficiency
Internal efficiency
Rankine efficiency
None of these
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
10 to 15 %
15 to 25 %
25 to 40 %
40 to 60 %
Isothermal
Isentropic
Hyperbolic
Polytropic
Natural draught
Induced draught
Forced draught
Balanced draught