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Steam Boilers - Interview Questions and Answers

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56. Water and sediment in fuel oil can be removed by
A. heating the oil in the settling tanks
B. cooling the oil in the settling tanks
C. burning the oil
D. suspension
E. filtering.
Explanation:
57. Sublimation region is the region where
A. solid and vapour phases are in equilibrium
B. solid and liquid phases are in equilibrium
C. liquid and vapour phases are in equilibrium
D. solid, liquid and vapour phases are in equilibrium
E. none of the above.
Explanation:
58. Pulverized fuel is used for
A. better burning
B. more calorific value
C. less radiation loss
D. medium sized units
E. stoker fired boilers.
Explanation:
59. Sulphur in coal results in
A. causing clinkering and slagging
B. corroding air heaters
C. spontaneous combustion during coal storage
D. facilitating ash precipitation
E. all of the above.
Explanation:
60. Pour point of fuel oil is the
A. lowest temperature at which oil will flow under set condition
B. storage temperature
C. temperature at which fuel is pumped through burners
D. temperature at which oil is transported
E. none of the above.
Explanation:
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