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Mechanical Engineering Objective Questions { Power Plant Engineering }

71. 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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72. The biggest size of thermal power unit operating in India is
A.30 MW
B.500 MW.
C.100 MW
D.210 MW
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73. Which of the following coals has the highest calorific value
A.Anthracite coal
B.Bituminous coal
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74. The high pressure boiler is ohe producing steam at a pressure more than
A.Atmospheric pressure
B.75-80 kg/cm2.
C.10 kg/cm2
D.40 kg/cm2
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75. The crown of the fire box is made hemispherical in order to
A.Give maximum space
B.Give maximum strength
C.Withstand pressure inside boiler
D.Resist intense heat in fire box
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76. Which of the following is steam &el
A.Non-coking bituminous coal
B.Brown coal
C.Pulverised coal
D.Coking bituminous coal
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77. The fire tubes in a Cothran and Scotish marine boiler are
D.Both horizontal and vertical
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