Which is not correct statement about pulverized fuel firing?
Which is not correct statement about pulverized fuel firing?
The fire tubes in a Scotch marine boiler are
The fire tubes in a Scotch marine boiler are
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called
The device attached to the steam chest for preventing explosions due to excessive internal pressure of steam is called
Benson boiler requires
Benson boiler requires
A fusible plug is fitted in small boilers in order to
A fusible plug is fitted in small boilers in order to
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly
Locomotive boiler is of the following type
Locomotive boiler is of the following type
The balanced draft furnace is one using
The balanced draft furnace is one using
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)
When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
When the speed of the crankshaft is between 100 r.p.m. and 250 r.p.m., the engine said to be a
Which of the following substance will have same percentage in both proximate and ultimate analysis?
Which of the following substance will have same percentage in both proximate and ultimate analysis?
Which of the following varieties of coals is mostly used in steam boilers?
Which of the following varieties of coals is mostly used in steam boilers?
The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.
The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.
In locomotives, the draught is produced by
In locomotives, the draught is produced by
The natural draught is produced by
The natural draught is produced by
A single acting steam engine produces __________ power than that of double acting steam engine.
A single acting steam engine produces __________ power than that of double acting steam engine.
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be
The function of injector used in small capacity boilers is to
The function of injector used in small capacity boilers is to
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is
At critical point, i.e. p=225.65 kg/cm², the latent enthalpy of vaporisation is
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
Which is not the correct statement about moisture in coal?
Which is not the correct statement about moisture in coal?
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as
The maximum discharge through a chimney occurs when the height of chimney is
The maximum discharge through a chimney occurs when the height of chimney is
In water wall furnace, the heat is transferred to the water walls by
In water wall furnace, the heat is transferred to the water walls by
In designing air preheaters, the important design consideration is that
In designing air preheaters, the important design consideration is that
The flow through a nozzle is regarded as
The flow through a nozzle is regarded as
Pick up the wrong statement about water tube boiler in comparison to fire tube boilers
Pick up the wrong statement about water tube boiler in comparison to fire tube boilers
During storage, the heating value of coal
During storage, the heating value of coal
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called
At very low temperature, the melting and boiling temperatures become equal. This temperature is
At very low temperature, the melting and boiling temperatures become equal. This temperature is
Pick up the correct statement as regards Cornish boiler and Lancashire boiler
Pick up the correct statement as regards Cornish boiler and Lancashire boiler
Presence of moisture in fuel oil would
Presence of moisture in fuel oil would
The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as
The ratio of heat actually used in producing the steam to the heat liberated in the furnace, is known as
Maximum energy loss in a boiler occurs due to
Maximum energy loss in a boiler occurs due to
Which of the following is a fire tube boiler?
Which of the following is a fire tube boiler?
The shell diameter and length of locomotive boiler are
The shell diameter and length of locomotive boiler are
The Locomotive boiler has
The Locomotive boiler has
A safety valve mainly used with locomotive and marine boilers is
A safety valve mainly used with locomotive and marine boilers is
100% efficiency of a thermal cycle cannot be achieved because of
100% efficiency of a thermal cycle cannot be achieved because of
The state of vapor under saturation condition is described by
The state of vapor under saturation condition is described by
The cylinder condensation or missing quantity may be reduced by
The cylinder condensation or missing quantity may be reduced by
Thermal efficiency of well maintained boiler will be of the order
Thermal efficiency of well maintained boiler will be of the order
On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by
On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by
The basic job of feed water treatment in boilers is to overcome the problem of
The basic job of feed water treatment in boilers is to overcome the problem of
The diameters of fire tubes and superheater tubes in locomotive boiler are
The diameters of fire tubes and superheater tubes in locomotive boiler are
Sulphur in coal results in
Sulphur in coal results in
Boiler H.P. is defined as the
Boiler H.P. is defined as the
The power of a boiler may be defined as
The power of a boiler may be defined as
The relative efficiency is defined as the
The relative efficiency is defined as the
The object of producing draught in a boiler is
The object of producing draught in a boiler is
The process of maintaining the speed of the turbine constant for various load conditions, is known as
The process of maintaining the speed of the turbine constant for various load conditions, is known as
O₂ content in atmospheric air on volume basis is
O₂ content in atmospheric air on volume basis is
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.
A steam nozzle converts
A steam nozzle converts
Stoichiometric quantity of air is the
Stoichiometric quantity of air is the
All steam engines work on
All steam engines work on
The efficiency of a boiler is defined as
The efficiency of a boiler is defined as
The artificial draught is produced by
The artificial draught is produced by
Steam turbines may be classified according to
Steam turbines may be classified according to
The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.
The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.
When the inlet pressure of steam is equal to the exit pressure, then
When the inlet pressure of steam is equal to the exit pressure, then
Lancashire boiler is of
Lancashire boiler is of
An economiser is generally placed between
An economiser is generally placed between
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as
A device used in a boiler to control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required, is known as
Efficiency of Rankine cycle can be increased by
Efficiency of Rankine cycle can be increased by
In a throttling process
In a throttling process
Coke is produced by
Coke is produced by
An economiser is installed in a boiler primarily to
An economiser is installed in a boiler primarily to
Carbonization of coal is the process of
Carbonization of coal is the process of
The amount of water evaporated in kg per kg of fuel burnt is called
The amount of water evaporated in kg per kg of fuel burnt is called
Which of the following are boiler accessories?
Which of the following are boiler accessories?
The fire tubes in, a Coarran and Scottish marine boiler are
The fire tubes in, a Coarran and Scottish marine boiler are
In a reaction turbine, when steam flows through the moving blades,
In a reaction turbine, when steam flows through the moving blades,
O₂ content in atmospheric air on weight basis is
O₂ content in atmospheric air on weight basis is
In fire tube boilers
In fire tube boilers
The equivalent evaporation is defined as
The equivalent evaporation is defined as
The high steam and low water safety valve is used to blow off steam when the
The high steam and low water safety valve is used to blow off steam when the
The selection of type and size of a steam boiler depends upon
The selection of type and size of a steam boiler depends upon
The impulse reaction turbine has its driving force
The impulse reaction turbine has its driving force
Steam turbines are used for
Steam turbines are used for
The maximum heat loss is a boiler occurs due to
The maximum heat loss is a boiler occurs due to
The basic purpose of drum in boiler is to
The basic purpose of drum in boiler is to
Which of the following is a fire tube boiler?
Which of the following is a fire tube boiler?
Orsat meter is used for
Orsat meter is used for
A stage, in reaction turbine, is represented by
A stage, in reaction turbine, is represented by
The maximum steam pressure in a Locomotive boiler is limited to
The maximum steam pressure in a Locomotive boiler is limited to
The major axis of elliptical manholes on the shell should be provided
The major axis of elliptical manholes on the shell should be provided
Alkaline pyrogallate is used in Orsat's apparatus for absorption of
Alkaline pyrogallate is used in Orsat's apparatus for absorption of
The diameter of flue tube in a Cornish boiler is _________ that of the shell.
The diameter of flue tube in a Cornish boiler is _________ that of the shell.
The cylindrical shell of a Lancashire boiler has diameter from
The cylindrical shell of a Lancashire boiler has diameter from
With increase in load, convection superheater has
With increase in load, convection superheater has
In an impulse turbine
In an impulse turbine
An economiser in a boiler
An economiser in a boiler
A safety valve usually employed with stationary boilers is
A safety valve usually employed with stationary boilers is
The indicated thermal efficiency is defined as the
The indicated thermal efficiency is defined as the
The effect of friction on the flow of steam through a nozzle is to
The effect of friction on the flow of steam through a nozzle is to
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
On Mollier chart, flow through turbine is represented by
On Mollier chart, flow through turbine is represented by
