Related Questions
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The height of chimney in a power plant is governed by
A. The draft to be created
B. Limitation of construction facilities
D. Quantity of flue gases to be handled
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4
The condition of steam in boiler drum is always
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Alkaline pyrogallate is used in Orsat's apparatus for absorption of
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The pressure velocity compounded impulse turbine allows a bigger pressure drop and hence __________ numbers of stages are required.
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Boiler H.P. is defined as the
A. Steam evaporation rate per kg of fuel fired
B. Work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
C. The evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
D. Work done by 1 kg of steam at saturation condition
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4
The proximate analysis of fuel lists
A. Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
B. Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
C. Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
D. Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
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4
Cut-off governing of steam engines is a method of controlling the engine output by varying
A. Volume of intake steam
B. Pressure of intake steam
C. Temperature of intake steam
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If the critical pressure ratio for steam is 0.546, then the steam is initially
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In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
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The number of flue tubes in Lancashire boiler is
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During polytropic process
A. Heat transfer takes place across cylinder walls
C. Steam may be wet, dry or superheated after expansion
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Equivalent evaporation is the amount of water evaporated in a boiler from and at
C. Saturation temperature at given pressure
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During storage, the heating value of coal
D. May increase or decrease depending upon the method of storage
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The diagram factor is the ratio of the
A. Area of the actual indicator diagram to the area of theoretical indicator diagram
B. Actual workdone per stroke to the theoretical workdone per stroke
C. Actual mean effective pressure to the theoretical mean effective pressure
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4
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as
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4
The overall efficiency of thermal power plant is
A. Boiler efficiency, turbine efficiency, generator efficiency
B. All the three above plus gas cycle efficiency
C. Carnot cycle efficiency
D. Regenerative cycle efficiency
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In case of non-condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the condenser pressure.
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Willians line for the steam engine is a straight line relationship between the steam consumption per hour and
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A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are
A. Supplied by same manufacturer loose and assembled at site
B. Supplied mounted on a single base
C. Purchased from several parties and packed together at site
D. Packaged boiler does not exist
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The numbers of fire tubes in a Cochran boiler are
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A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimney, is known as
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In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be
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If partial pressure of air and steam be pa and ps respectively in a condenser, then according to Dalton's law, the pressure in condenser is equal to
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The friction present between the steam and the nozzle surfaces reduces the heat drop by
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Cochran boiler is a
A. Horizontal fire tube boiler
B. Horizontal water tube boiler
C. Vertical water tube boiler
D. Vertical fire tube boiler
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The size of a boiler drum in pulverised fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase
D. Increases/decreases depending on steam temperature requirements
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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
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The ratio of the clearance volume to the swept volume is called
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Caking coals are those which
A. Form lumps or masses of coke
C. Show little or no fusing action
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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 metres, and T1 = Absolute temperature of air outside the chimney in K)