Gusset stays in a boiler are provided to
A. Prevent the bulging of flat surfaces
B. Avoid explosion in furnace
C. Prevent leakage of hot flue gases
D. Support furnace freely from top
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Evaporative capacity of boiler is expressed as
A. kg of steam produced
B. Steam pressure produced
C. kg of fuel fired
D. kg of steam produced per kg of fuel fifed
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It is required to produce large amount of steam at low pressure. Which boiler should be used?
A. Pulverized fuel fired boiler
B. Cochran boiler
C. Lancashire boiler
D. Babcock and Wilcox boiler
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Equivalent evaporation of water is the evaporation for a feed water supply at 100°C
A. And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2
B. And its corresponding conversion into dry steam at desired boiler pressure
C. Conversion into steam at atmospheric condition
D. Conversion into steam at the same pressure at which feed water is supplied
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The effect of friction in the nozzle __________ dryness fraction of steam.
A. Has no effect on
B. Decreases
C. Increases
D. None of these
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The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
A. Remains same
B. Decreases
C. Increases
D. None of these
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Rateau turbine is
A. Simple reaction turbine
B. Velocity compounded turbine
C. Pressure compounded turbine
D. Pressure-velocity compounded turbine
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The size of a boiler drum in pulverized fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase
A. Increases
B. Decreases
C. Remains unchanged
D. Increases/decreases depending on steam temperature requirements
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Sulphur content of fuels is very important to the plant operators because it
A. Has high heating value
B. Retards electric precipitation
C. Promotes complete combustion
D. Has highly corrosive effect
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A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as
A. Steam condenser
B. Steam boiler
C. Steam preheater
D. Economiser
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The expansion of steam, as it flows over the blades in reaction turbine, represents
A. Isothermal process
B. Isentropic process
C. Throttling process
D. Free expansion process
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Multi-stage steam turbines are of the
A. Velocity compounded type
B. Reaction type
C. Pressure compounded type
D. All of these
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The difference between Cornish boiler and Lancashire boiler is that
A. Former is fire tube type and latter is water tube type boiler
B. Former is water tube type and latter is fire tube type
C. Former contains one fire tube and latter contains two fire tubes
D. None of the above
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Boilers, Engines, Nozzles and Turbines Objective Questions and Answers pdf:- 101. The difference between cornish boiler and lancashire boiler is that
A. former is fire tube type and latter is water tube type boiler
B. former is water tube type and latter is fire tube type
C. former contains one fire tube and latter contains two fire tubes
D. none of the above
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Water tube boilers are those in which
A. Flue gases pass through tubes and water around it
B. Water passes through the tubes and flue gases around it
C. Work is done during adiabatic expansion
D. Change in enthalpy
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Fire tube boilers are those in which
A. Flue gases pass through tubes and water around it
B. Water passes through the tubes and flue gases around it
C. Forced circulation takes place
D. Tubes are laid vertically
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Parson's reaction turbine is a __________ reaction turbine.
A. 40 percent
B. 50 percent
C. 60 percent
D. 70 percent
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The increase in pressure
A. Lowers the boiling point of a liquid
B. Raises the boiling point of a liquid
C. Does not affects the boiling point of a liquid
D. Reduces its volume
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The latent heat of steam with increase of pressure
A. Remain same
B. Increases
C. Decreases
D. Behaves unpredictably
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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.
A. Equal to
B. Less than
C. More than
D. None of these
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