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Mechanical Engineering Objective Questions { Power Plant Engineering }



113. Boiler stays are used to
A.Prevent flat surfaces under pressure from tearing apart
B.Take care of failure in shear
C.Take care of failure in compression
D.Provide support for boiler

114. The radius of a dished head is taken approximately as
A.One-fourth
B.Half
C.One
D.Two

115. Size of boiler tubes is specified by
A.Mean diameter and thickness
B.Inside diameter and thickness
C.Outside diameter and thickness
D.Outside diameter and inside diameter

116. The heat loss in a boiler takes place in the form of
A.Heat carried away by flue gases
B.All of the above.
C.Moisture present in fuel and steam formed by combustion of hydrogen in fuel
D.Radiation

117. The major axis of elliptical manholes on the shell should be provided
A.Longitudinally
B.Circumferentially
C.On dished end
D.Anywhere

118. In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine
A.Lancashire boiler
B.Locomotive boiler
C.Babcock and wilcox boiler
D.Cochran boiler

119. With increase in load, radiant superheater has
A.Drooping characteristic
B.141ear characterisstic
C.Rising characteristic 71
D.Flat characteristic

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