Blades are equiangular
Blade velocity coefficient is unity
Blades are equiangular and frictionless
Blade solidity is 0.65
C. Blades are equiangular and frictionless
60°
90°
180°
270°
A steam turbine develops higher speeds
The efficiency of steam turbine is higher
The steam consumption is less
All of these
Atmospheric pressure
5 kg/cm²
10 kg/cm²
7580 kg/cm²
Decrease the mass flow rate and to increase the wetness of steam
Increase the mass flow rate and to increase the exit temperature
Decrease the mass flow rate and to decrease the wetness of steam
Increase the exit temperature without any effect on mass flow rate
1.5 to 2 m
2.5 to 3.5 m
3.5 to 4.5 m
None of these
Supply of excess, air
Supply of excess coal
Burning CO and unburnts in upper zone of furnace by supplying more air
Fuel bed firing
One half
One third
One fourth
One fifth
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
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
200-400 kcal/ kg
800-1200 kcal/ kg
2000-4000 kcal/ kg
5000-8000 kcal/ kg
Lancashire boiler
Locomotive boiler
Babcock and Wilcox boiler
Benson boiler
Lever safety valve
Dead weight safety valve
High steam and low water safety valve
All of these
Prevent the bulging of flat surfaces
Avoid explosion in furnace
Prevent leakage of hot flue gases
Support furnace freely from top
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
Condenser
Condensate pump
Air extraction pump
All of these
Better burning
More calorific value
Less radiation loss
Medium sized units
Blading efficiency
Nozzle efficiency
Gross or stage efficiency
Mechanical efficiency
Cement industry
Thermal power plant
Blast furnace
Domestic use
Remains the same
Increases
Decreases
Is unpredictable
Pulverised fuel fired boiler
Cochran boiler
Lancashire boiler
Babcock and Wilcox boiler
Ash
Volatile matter
Moisture
Hydrogen
0.546
0.577
0.582
0.601
Stationary < fire tube type
Horizontal type
Natural circulation type
All of the above
Simple reaction turbine
Velocity compounded turbine
Pressure compounded turbine
Pressure-velocity compounded turbine
Increases
Decreases
Remain unaffected
First increases and then decreases
373°K
273.16°K
303°K
0°K
Steam evaporation rate per kg of fuel fired
Work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
The evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
Work done by 1 kg of steam at saturation condition
Blading efficiency
Nozzle efficiency
Stage efficiency
Mechanical efficiency
0.17 MN/m²
1.7 MN/m²
17 MN/m²
170 MN/m²
Low
Very low
High
Very high