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Mechanical Engineering Objective Questions { Power Plant Engineering }

99. The number of drums in Benson steam generator is
C.One steam drum and one water drum
D.No drum

100. A fusible plug is fitted in small boilers in order to
A.Avoid excessive build up of pressure
B.Avoid explosion
C.Extinguish fire if water level in the boiler falls below alarming limit
D.Control steam dome

101. The fusible plug in small boilers is located
A.In the drum
B.In the fire tubes
C.Above steam dome
D.Over the combustion chamber

102. Fusible plug for boilers is made of fusible metal containing tin, lead, and

103. 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 100C into dry saturated steam
C.The evaporation of 15.65 kg of water per hour from and at 100C into dry saturated steam
D.Work done by 1 kg of steam at saturation condition

104. In forced recirculation type boiler,
A.Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B.Water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
C.Feed pump is employed to supplement natural circuladon in water wall type furnace
D.Water is converted into steam in one pass without any recirculation

105. The ratio of heat utilised to produce steam and the heat liberated in furnace is known as
A.Boiler effectiveness
B.Boiler efficiency.
C.Factor of evaporation
D.Equivalent evaporation

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