V = 2g H'
V = 2g/H'
V = H'/2g
V = 2gH'
A. V = 2g H'
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
To blow off steam when the pressure of steam inside the boiler exceeds the working pressure
To indicate the water level inside the boiler to an observer
To measure pressure of steam inside the steam boiler
None of the above
0.528
0.546
0.577
0.582
Increases
Decreases
Remain unaffected
First increases and then decreases
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
The power required and working pressure
The geographical position of the power house
The fuel and water available
All of the above
Increases
Decreases
Remain same
None of these
4.75 mm
5.47 mm
7.45 mm
47.5 mm
30 MW
60 MW
100 MW
500 MW
Horizontal
Vertical
Inclined
Both horizontal and vertical
Keep the burner tips cool
Aid in proper combustion
Because sputtering, possibly extinguishing flame
Clean the nozzles
40 %
50 %
75 %
90 %
Climatic conditions
Temperature of furnace gases
Height of chimney
All of these
Boiler effectiveness
Boiler evaporative capacity
Factor of evaporation
Boiler efficiency
Provide air around burners for obtaining optimum combustion
Transport and dry the coal
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
Air delivered by induced draft fan
Does not change
Increases
Decreases
None of these
Single tube, horizontal, internally fired and stationary boiler
Single tube, vertical, externally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Multi-tubular, horizontal, externally fired and stationary boiler
Equal to the velocity of sound
Less than the velocity of sound
More than the velocity of sound
None of these
Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these
Lever safety valve
Dead weight safety valve
High steam and low water safety valve
All of these
Hygroscopic substances
Water vapour in air
Temperature of air
Pressure of air
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
Lancashire boiler
Babcock and Wilcox boiler
Locomotive boiler
Cochran boiler
Multi tubular
Horizontal
Internally fired
All of the above
To give maximum space and strength
To withstand the pressure of steam inside the boiler
Both (A) and (B)
None of the above
Increases
Decreases
Remain unaffected
First increases and then decreases
Horizontal fire tube boiler
Horizontal water tube boiler
Vertical water tube boiler
Vertical fire tube boiler
Work done during the Rankine cycle
Work done during compression
Work done during adiabatic expansion
Change in enthalpy
Vb = 0.5 V cosα
Vb = V cosα
Vb = 0.5 V² cosα
Vb = V² cosα
A fire tube boiler occupies less space than a water tube boiler, for a given power.
Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.
A simple vertical boiler has one fire tube.
All of the above