Increases
Decreases
Does not effect
None of these
B. Decreases
Remains same
Decreases
Increases
None of these
Increases steam pressure
Increases steam flow
Decreases fuel consumption
Decreases steam pressure
Internally fired
Externally fired
Internally as well as externally fired
None of these
Same
More
Less
Less or more depending on size of boiler
Increases
Decreases
Remains constant
None of these
Locomotive boiler
Babcock and Wilcox boiler
Stirling boiler
All of the above
Increases
Decreases
Remain same
None of these
CO₂
CO
O₂
N₂
Air present in atmosphere at NTP conditions
Air required for complete combustion of fuel with no excess air
Air required for optimum combustion so as to have reasonable excess air
Air required to convert CO into CO₂
Increases evaporative capacity of the boiler
Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of the above
Water passes through the tubes which are surrounded by flames and hot gases
The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place
None of these
Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
Increase the temperature of saturated steam without raising its pressure
Can be raised rapidly
Is raised at slower rate
Is raised at same rate
Could be raised at fast/slow rate depending on design
Below atmospheric pressure
1 kg/cm²
100 kg/cm²
225.6 kg/cm²
Carnot cycle
Rankine cycle
Joule cycle
Stirling cycle
Convection
Radiation
Conduction
Radiation and conduction
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
Enriching carbon in the coal
3.3 bar
5.46 bar
8.2 bar
9.9 bar
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
Throttle governing
Cut-off governing
By-pass governing
None of these
Carnot cycle
Joule cycle
Stirling cycle
Brayton cycle
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
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
6.25 mm
62.5 mm
72.5 mm
92.5 mm
Cut-off ratio
Expansion ratio
Clearance ratio
None of these
Induced draft fan and chimney
Induced draft fan and forced draft fan
Forced draft fan and chimney
Any one of the above
Reheating of steam
Regenerative feed heating
Binary vapour plant
Any one of these
Remains the same
Increases
Decreases
Is unpredictable
One
Two
Three
Four
More
Equal
Less
Could be more or less depending on the size of plant