Steam Boilers - Interview Questions | Exam2Win

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76. The capacity of induced draft fan compared to forced draft fan in a boiler is

A. same

B. more

C. less

D. less or more depending on size of boiler

E. unpredictable.

Explanation:

77. The proximate analysis of fuel lists

A. various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume

B. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight

C. fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash

D. fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

E. moisture and ash free heating value.

Explanation:

78. The basic job of feed water treatment in boilers is to overcome the problem of

A. corrosion

B. scale

C. carryover

D. embitterment

E. all of the above.

Explanation:

79. On Mollier chart, flow through turbine is represented by '

A. horizontal straight line

B. vertical straight line

C. straight inclined line

D. curved line

E. none of the above.

Explanation:

80. For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has

A. more heating surface

B. less heating surface

C. equal heating surface

D. heating surface depends on other parameters

E. none of the above.

Explanation: