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Mechanical Engineering Objective Questions { Power Plant Engineering }

92. The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is
D.Could be more or less depending on other factors
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93. A boiler in India should conform to safety regulations of
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94. The function of injector used in small steam plants is to
A.Create vacuum in furnace
B.Create vacuum at turbine exhaust
C.Pump feed water
D.Dose chemicals in feed water
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95. Which of the following boilers is best suited to meet fluctuating demands
A.Babcock and wilcox
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96. The difference between comish 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.(e) none)of the above.
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97. In accelerated circulation type boiler
A.Heating takes place at bottom and the water supplied at bottom gets converted into the mixfur- e of steam bubbles and hot water which rise to durm ,
B.Water is supplied in drum and through dovvncomers located in atmospheric conditon it passes to the water wall and rises to durrn in the from of mixture of water and steam
C.Feed pump is employed to supplement natural circulation in water wall type furnace
D.(e) water is converted into stam in one pass without any recirculation
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98. Pick up the wrong statement about water tube boiler in comparison to fire tube boilers
A._former generates steam at high pressure
B.Chances of _explosion are less in former case.
C.Rate of steam flow is more in former case
D.Former is used for high installed capacity
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