Increases evaporative capacity of the boiler
Increases the efficiency of the boiler
Enables low grade fuel to be burnt
All of the above
D. All of the above
Increase thermal efficiency of boiler
Economise on fuel
Extract heat from the exhaust flue gases
Increase flue gas temperature
One
Two
Three
Four
The steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
The expansion of steam takes place partly in the fixed blades and partly in the moving blades
The steam is expanded from a high pressure to a condenser pressure in one or more nozzles
The pressure and temperature of steam remains constant
3.3 bar
5.46 bar
8.2 bar
9.9 bar
Bismuth
Copper
Aluminium
Nickel
Convection
Radiation
Conduction
Radiation and conduction
Better burning
More calorific value
Less radiation loss
Medium sized units
Increases
Decreases
Does not effect
None of these
Blow off cock
Fusible plug
Stop valve
Safety valve
Has high heating value
Retards electric precipitation
Promotes complete combustion
Has highly corrosive effect
Cornish is fire tube and Lancashire is water tube
Cornish is water tube and Lancashire is fire tube
Cornish has two fire tubes and Lancashire has one
Lancashire has two fire tubes and Cornish has one
Blow off cock
Fusible plug
Superheater
Stop valve
Has no effect on
Decreases
Increases
None of these
Horizontal fire tube boiler
Horizontal water tube boiler
Vertical water tube boiler
Vertical fire tube boiler
2 to 4.5 m
3 to 5 m
5 to 7.5 m
7 to 9 m
Regulate flow of boiler water
Check level of water in boiler drum
Recirculate unwanted feed water
Allow high pressure feed water to flow to drum and not allow reverse flow to take place
Zero
Minimum
Maximum
None of these
T1 /88.25H
88.25H/T1
T1 /176.5H
176.5H/T1
Increases
Decreases
Remain constant
May increase or decrease depending upon the method of storage
Diagram efficiency
Nozzle efficiency
Gross efficiency
None of these
Climatic conditions
Temperature of furnace gases
Height of chimney
All of these
0.546
0.577
0.582
0.601
Work done during the Rankine cycle
Work done during compression
Work done during adiabatic expansion
Change in enthalpy
Heating the oil in the settling tanks
Cooling the oil in the settling tanks
Burning the oil
Suspension
Former occupies less space for same power
Rate of steam flow is more in former case
Former is used for high installed capacity
Chances of explosion are less in former case.
1 m
1.5 m
2 m
2.5 m
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.
Desirable
Economical
Essential
Uneconomical
Condenser efficiency
Vacuum efficiency
Nozzle efficiency
Boiler efficiency
225.65 kgf/ cm²
273 kgf/ cm²
100 kgf/ cm²
1 kgf/ cm²