Power Plant Engineering - Interview Questions | Exam2Win

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76. Secondary air is the air used to

A. reduce the flame length

B. increase the flame length

C. transport and dry the coal

D. provide air round the burners for getting optimum combustion

Explanation:

77. Blowing down of boiler water is the process

A. to reduce the boiler pressure

B. to increase the steam temperature

C. to control the solid concentration in the boiler water by removing some of the

D. ntrated saline water

Explanation:

78. The percentage O2 by Veight in atmospheric air is

A. 18%

B. 23%

C. 77%

D. 79%

Explanation:

79. Compounding of steam turbine is done for

A. reducing the work done

B. increasing the rotor speed

C. reducing the rotor speed

D. balancing the turbine

Explanation:

80. Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is

A. underfeed stoker

B. overfeed stoker

C. any

D. overfeed stoker

Explanation:

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