Blow off cock
Fusible plug
Stop valve
Safety valve
B. Fusible plug
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Steam boiler
Steam turbine
Steam condenser
Steam injector
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
Workdone on the blades to the energy supplied to the blades
Workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
Energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
None of the above
Condenser efficiency
Nozzle efficiency
Boiler efficiency
Vacuum efficiency
78-81 %
81-85 %
85-90 %
90-95 %
1 to 2 m
1.25 to 2.25 m
1.5 to 2.5 m
1.75 to 2.75 m
Corrosion
Scale
Carryover
All of the above
Linearly
Slowly first and then rapidly
Rapidly first and then slowly
Inversely
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 forced draft fan
Higher effectiveness of boiler
High calorific value coal being burnt
Fouling of heat transfer surfaces
Raising of steam temperature
Below atmospheric pressure
1 kg/cm²
100 kg/cm²
225.6 kg/cm²
α₁ = α₂ and β₁ = β₂
α₁ = β₁ and α₂= β₂
α₁ < β₁ and α₂ > β₂
α₁ = β₂ and β₁ = α₂
To provide an adequate supply of air for the fuel combustion
To exhaust the gases of combustion from the combustion chamber
To discharge the gases of combustion to the atmosphere through the chimney
All of the above
Former is fire tube type and latter is water tube type boiler
Former is water tube type and latter is fire tube type
Former contains one fire tube and latter contains two fire tubes
None/of the above
From a metal wall from one medium to another
From heating an intermediate material and then heating the air from this material
By direct mixing
Heat is transferred by bleeding some gas from furnace
1 kg
4/3 kg
8/3 kg
2 kg
Lever safety valve
Dead weight safety valve
High steam and low water safety valve
All of these
Initial conditions of steam
Back pressure
Initial pressure of steam
All of these
Non-coking bituminous coal
Brown coal
Peat
None of the above
Remains constant
Decreases
Increases
None of these
To determine the generating capacity of the boiler
To determine the thermal efficiency of the boiler when working at a definite pressure
To prepare heat balance sheet for the boiler
All of the above
More
Equal
Less
Could be more or less depending on the size of plant
Climatic conditions
Temperature of furnace gases
Height of chimney
All of these
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
High calorific value
Produce minimum smoke and gases
Ease in storing
High ignition point
Equal
Less
More
None of these
Dry
Wet
Saturated
Supersaturated
Pressure drop across the rotor
Change in axial velocity
Both (A) and (B)
None of these
1000 J
360 kJ
3600 kJ
3600 kW/sec