Same as
2 times
4 times
8 times
D. 8 times
Flue gases pass through tubes and water around it
Water passes through the tubes and flue gases around it
Work is done during adiabatic expansion
Change in enthalpy
Velocity compounded type
Reaction type
Pressure compounded type
All of these
Horizontal
Vertical
Inclined
None of these
160/3 m/s
320/3 m/s
640/3 m/s
640 m/s
421 kg.m
421 kg.m
539 kg.m
102 kg.m
Regenerative heating
Reheating of steam
Bleeding
None of these
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
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
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
More
Less
Same
Could be more or less depending on other factors
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Increases
Decreases
Remain unaffected
First increases and then decreases
Simple impulse turbine
Simple reaction turbine
Impulse-reaction turbine
None of these
Horizontal multi-tubular water tube boiler
Water wall enclosed furnace type
Vertical tubular fire tube type
Horizontal multi-tubular fire tube type
Temperature, time, and turbulence
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature
Total air, time, and temperature
Minimum
Maximum
Zero
None of these
As an impulsive force
As a reaction force
Partly as an impulsive force and partly as a reaction force
None of the above
Blow off cock
Feed check valve
Steam stop valve
None of these
1.05
2.86
6.65
10.05
0.546
0.577
0.582
0.601
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
Carbon, hydrogen, nitrogen, sulphur, moisture
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Lower calorific value
60°
90°
180°
270°
Low
Moderate
High
None of these
Does not change
Increases
Decreases
None of these
Large marine propulsion
Electric power generation
Direct drive of fans, compressors, pumps
All of these
Slow speed engine
Vertical steam engine
Condensing steam engine
Non-condensing steam engine
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
The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
The forces in the working parts are increased as the forces are distributed over more parts.
The ratio of expansion is reduced, thus reducing the length of stroke.
The temperature range per cylinder is increased, with corresponding increase in condensation.