Reheating of steam in a turbine
Reheating of steam in a turbine
In forced recirculation type boiler,
In forced recirculation type boiler,
The critical pressure at which latent heat of vaporisation is zero is
The critical pressure at which latent heat of vaporisation is zero is
A condenser in a steam power plant
A condenser in a steam power plant
In a reaction turbine, when steam flows through the fixed blades,
In a reaction turbine, when steam flows through the fixed blades,
The ratio of total useful heat drop to the total isentropic heat drop, is called
The ratio of total useful heat drop to the total isentropic heat drop, is called
Bomb calorimeter is used to determine
Bomb calorimeter is used to determine
The ultimate analysis of fuel lists
The ultimate analysis of fuel lists
-
-
-
-
Which of the following compound steam engine requires a smaller flywheel?
Which of the following compound steam engine requires a smaller flywheel?
The steam enters the nozzle at a
The steam enters the nozzle at a
Latent heat of dry steam at atmospheric pressure is equal to
Latent heat of dry steam at atmospheric pressure is equal to
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is
One kg of steam sample contains 0.8 kg dry steam? Its dryness fraction is
The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)
The maximum efficiency of a De-Laval turbine is (where α = Nozzle angle)
Curtis turbine is a
Curtis turbine is a
The water tubes in a Babcock and Wilcox boiler are
The water tubes in a Babcock and Wilcox boiler are
Over fire burning is the phenomenon of
Over fire burning is the phenomenon of
In natural circulation type boiler,
In natural circulation type boiler,
The length of Cornish boiler is of the order of
The length of Cornish boiler is of the order of
Primary air is the air used to
Primary air is the air used to
The diameter of fire tubes in Cochran boiler is of the order of
The diameter of fire tubes in Cochran boiler is of the order of
The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)
The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)
Water boils when its vapor pressure
Water boils when its vapor pressure
The ratio of heat equivalent to brake power to the energy supplied in steam is known as
The ratio of heat equivalent to brake power to the energy supplied in steam is known as
Vacuum for reciprocating steam engines compared to steam turbines is
Vacuum for reciprocating steam engines compared to steam turbines is
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.
The nozzle efficiency is the ratio of
The nozzle efficiency is the ratio of
The performance of a boiler is measured by the
The performance of a boiler is measured by the
Thermal efficiency of a thermal power plant is of the order of
Thermal efficiency of a thermal power plant is of the order of
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as
In order to compare the capacity of boilers, the feed water temperature and working pressure are taken as
The turbine blades are
The turbine blades are
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine
Secondary air is the air used to
Secondary air is the air used to
The pressure at which latent heat of vaporisation of water is zero, is
The pressure at which latent heat of vaporisation of water is zero, is
Efficiency of a thermal cycle increases by
Efficiency of a thermal cycle increases by
If the critical pressure ratio for steam is 0.546, then the steam is initially
If the critical pressure ratio for steam is 0.546, then the steam is initially
The diameter of cylindrical shell of the Lancashire boiler is of the order of
The diameter of cylindrical shell of the Lancashire boiler is of the order of
The missing quantity per stroke is equal to
The missing quantity per stroke is equal to
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.
The actual power generated in the engine cylinder is called
The actual power generated in the engine cylinder is called
The proximate analysis of fuel lists
The proximate analysis of fuel lists
-
-
-
-
The high steam and low water safety valve is not used in
The high steam and low water safety valve is not used in
The coal requirement per kW hour generation in the thermal power plant is of the order of
The coal requirement per kW hour generation in the thermal power plant is of the order of
Which of the following boiler works on a forced circulation of water?
Which of the following boiler works on a forced circulation of water?
A closed vessel made of steel and used for the generation of steam is called a
A closed vessel made of steel and used for the generation of steam is called a
The steam leaves the nozzle at a
The steam leaves the nozzle at a
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
Caking coals are those which
Caking coals are those which
The safety valve at superheater as compared to drum safety valve setting is set at
The safety valve at superheater as compared to drum safety valve setting is set at
A condenser where circulating water flows through tubes which are surrounded by steam, in known as
A condenser where circulating water flows through tubes which are surrounded by steam, in known as
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
The economiser is used in boilers to
The economiser is used in boilers to
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
In a single acting steam engine
In a single acting steam engine
The maximum discharge of steam through a convergent-divergent nozzle depends upon
The maximum discharge of steam through a convergent-divergent nozzle depends upon
The number of drums in Benson steam generator is
The number of drums in Benson steam generator is
In an ideal impulse turbine, the
In an ideal impulse turbine, the
De-Laval turbines are mostly used
De-Laval turbines are mostly used
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
In locomotive boiler, maximum steam pressure is limited to
In locomotive boiler, maximum steam pressure is limited to
The pressure of steam __________ while flowing through a nozzle.
The pressure of steam __________ while flowing through a nozzle.
When the nozzle operates with the maximum mass flow, the nozzle is said to be
When the nozzle operates with the maximum mass flow, the nozzle is said to be
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)
For combustion of a fuel, following is essential
For combustion of a fuel, following is essential
Which of the following statement is correct for a compound steam engine?
Which of the following statement is correct for a compound steam engine?
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)
In a nozzle, the effect of super-saturation is to
In a nozzle, the effect of super-saturation is to
Boiler stays are used to
Boiler stays are used to
Size of boiler tubes is specified by
Size of boiler tubes is specified by
With increase in load, radiant superheater has
With increase in load, radiant superheater has
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a
A wet vapor can be completely specified by
A wet vapor can be completely specified by
The evaporation of 15.653 kg of water per hour from and at 100°C is called
The evaporation of 15.653 kg of water per hour from and at 100°C is called
Hygrometry deals with the
Hygrometry deals with the
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
The specific heat of superheated steam in kcal/kg is generally of the order of
The specific heat of superheated steam in kcal/kg is generally of the order of
Calorific value of coal is of the order of
Calorific value of coal is of the order of
The diagram efficiency is the ratio of
The diagram efficiency is the ratio of
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is
Tertiary air is the air used to
Tertiary air is the air used to
A boiler in India should conform to safety regulations of
A boiler in India should conform to safety regulations of
Cut-off governing as compared to throttle governing is
Cut-off governing as compared to throttle governing is
Which device is used in thermal power plants to reduce level of pollution?
Which device is used in thermal power plants to reduce level of pollution?
The function of injector used in small steam plants is to
The function of injector used in small steam plants is to
The diameter of Cornish boiler is of the order of
The diameter of Cornish boiler is of the order of
Hard coke is produced by carburization of coal at
Hard coke is produced by carburization of coal at
Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and
Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and
The variation of steam pressure in the nozzle depends upon
The variation of steam pressure in the nozzle depends upon
Lancashire boiler is a
Lancashire boiler is a
