Increases
Decreases
Has no effect on
None of these
A. Increases
1.02 to 1.06
1.08 to 1.10
1.2 to 1.6
1.6 to 2
Equals that of the surroundings
Equals 760 mm of mercury
Equals to atmospheric pressure
Equals the pressure of water in the container
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
More heating surface
Less heating surface
Equal heating surface
Heating surface depends on other parameters
Prevent flat surfaces under pressure from tearing apart
Take care of failure in shear
Take care of failure in compression
Provide support for boiler
3.3 bar
5.46 bar
8.2 bar
9.9 bar
Pressure increases while velocity decreases
Pressure decreases while velocity increases
Pressure and velocity both decreases
Pressure and velocity both increases
1.5 m, 4 m
1.5 m, 6 m
1 m, 4 m
2 m, 4 m
Cochran boiler
Cornish boiler
Lancashire boiler
Locomotive boiler
40 percent
50 percent
60 percent
70 percent
Carbon, hydrogen, nitrogen, sulphur, moisture
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Lower calorific value
To draw water
To circulate water
To drain off the water
All 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
Surface condenser
Jet condenser
Barometric condenser
Evaporative condenser
Chimney
Centrifugal fan
Steam jet
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
Prevent the bulging of flat surfaces
Avoid explosion in furnace
Prevent leakage of hot flue gases
Support furnace freely from top
Only moving blades
Only fixed blades
Identical fixed and moving blades
Fixed and moving blades of different shape
Equal to
Less than
Higher than
None of these
The efficient steam jacketing of the cylinder walls
Superheating the steam supplied to the engine cylinder
Keeping the expansion ratio small in each cylinder
All of the above
Stationary fire tube boiler
Internally fired boiler
Horizontal boiler
All of these
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
150 kg/h
210 kg/h
280 kg/h
340 kg/h
Serve as storage of steam
Serve as storage of feed water for water wall
Remove salts from water
Separate steam from water
Higher effectiveness of boiler
High calorific value coal being burnt
Fouling of heat transfer surfaces
Raising of steam temperature
There is a pressure drop in the nozzle
Fluid flows through the nozzle
Pressure drops and fluid flows through the nozzle
There is no pressure drop and fluid does not flow through the nozzle
Cylinder feed indicated mass of steam
Cylinder feed + indicated mass of steam
Mass of cushion steam + indicated mass of steam
Mass of cushion steam + cylinder feed
0.1 to 0.2 kg
0.2 to 0.4 kg
0.6 to 0.8 kg
1.0 to 1.5 kg
0.528
0.546
0.577
0.582
21 %
23 %
30 %
40 %