Steam Boilers - Interview Questions | Exam2Win

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11. 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

E. at the inlet of chimney.

Explanation:

12. Thermal efficiency of well maintained boiler will be of the order

A. 20%

B. 40%

C. 50%

D. 75%

E. 90%.

Explanation:

13. If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

A. throttling calorimeter

B. separating calorimeter

C. combined separating and throttling calorimeter

D. bucket calorimeter

E. none of the above.

Explanation:

14. Thermal efficiency of a thermal power plant is of the order of

A. 15%

B. 20%

C. 30%

D. 45%

E. opt 5

Explanation:

15. In a recuperative air preheater, the heat is transferred

A. from a metal wall from one medium to another

B. from heating an itermediate material and then heating the air from this material

C. by direct mixing ,

D. heat is transferred by bleeding some gases from furnace

E. none of the above.

Explanation: