Boil
Flash i.e. get converted into steam
Remain as it was
Cool down
B. Flash i.e. get converted into steam
Pressure alone
Temperature alone
Pressure and temperature
Pressure and dryness fraction
100 bar
150 bar
200 bar
250 bar
Below atmospheric pressure
1 kg/cm²
100 kg/cm²
225.6 kg/cm²
Supply of excess, air
Supply of excess coal
Burning CO and unburnts in upper zone of furnace by supplying more air
Fuel bed firing
Where low speeds are required
For small power purposes and low speeds
For large power purposes
For small power purposes and high speeds
Ratio of thermal efficiency to Rankine efficiency
Ratio of brake power to the indicated power
Ratio of heat equivalent to indicated power to the energy supplied in steam
Product of thermal efficiency and Rankine efficiency
Decreasing initial steam pressure and temperature
Increasing exhaust pressure
Decreasing exhausts pressure
Increasing the expansion ratio
Equal
Less
More
None of these
Create vacuum in furnace
Create vacuum at turbine exhaust
Pump feed water
Dose chemicals in feed water
Increases steam pressure
Increases steam flow
Decreases fuel consumption
Decreases steam pressure
Internally fired boiler
Externally fired boiler
Natural circulation boiler
Forced circulation boiler
Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Ratio of heat actually used in producing steam to the heat liberated in the furnace
Ratio of the mass of steam produced to the mass of total water supplied in a given time
Ratio of the heat liberated in the furnace to the heat actually used in producing steam
None of the above
Have common piston rod
Are set at 90°
Have separate piston rods
Are set in V-arrangement
More
Less
Same
Could be more or less depending on other factors
ps - pa
pa - ps
pa + ps
None of these
Can be raised rapidly
Is raised at slower rate
Is raised at same rate
Could be raised at fast/slow rate depending on design
Same
Less
More
None of these
Tonnes/hr. of steam
Pressure of steam in kg/cm²
Temperature of steam in °C
All of the above
The ratio of heat actually used in producing the steam to the heat liberated in the furnace
The amount of water evaporated or steam produced in kg per kg of fuel burnt
The amount of water evaporated from and at 100° C into dry and saturated steam
The evaporation of 15.653 kg of water per hour from and at 100° C
And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²
And its corresponding conversion into dry steam at desired boiler pressure
Conversion into steam at atmospheric condition
Conversion into steam at the same pressure at which feed water is supplied
0.528
0.546
0.577
0.582
Barometric pressure + actual pressure
Barometric pressure - actual pressure
Gauge pressure + atmospheric pressure
Gauge pressure - atmospheric pressure
Horizontal straight line
Vertical straight line
Straight inclined line
Curved line
Horizontal multi-tubular water tube boiler
Water wall enclosed furnace type
Vertical tubular fire tube type
Horizontal multi-tubular fire tube type
I.P. = a × m + b
m = a + b × I.P.
I.P. = b × m + a
m = (b/I.P.) - a
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.
Horizontal straight line
Vertical straight line
Straight inclined line
Curved line
Lancashire boiler
Locomotive boiler
Babcock and Wilcox boiler
Benson boiler
12 m
1.52.5 m
23 m
2.53.5 m