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Steam Boilers - Interview Questions and Answers

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181. The high pressure boiler is oiie producing steam at a pressure more than
A. atmospheric pressure
B. 5 kg/cm2
C. 10 kg/cm2
D. 40 kg/cm2
E. 75-80 kg/cm2.
Explanation:
182. In natural circulation 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 durm and through down-comers located in atmospheric conditon 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 circulation in water wall type furnace
D. water is converted into steam in one . pass without any recirculation
E. water is fed at atmospheric pressure.
Explanation:
183. The best suited coal for chain or travelling grate stoker boiler is
A. coking coal
B. non coking or free burning coal
C. pulverised coal
D. high sulphur coal
E. least ash content coal.
Explanation:
184. Which of the following varieties of coals is mostly used in steam boilers
A. non-coking bituminous coal
B. brown coal
C. peat
D. coking bituminous coal
E. none of the above.
Explanation:
185. A boiler in India should conform to safety regulations of
A. DIN
B. BS
C. ASTM
D. IBR
E. GOST.
Explanation:
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