Power Plant Engineering (2171910) MCQs

MCQs of Draught System

Showing 21 to 26 out of 26 Questions
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21.

In a furnace employing forced draught compared to induced draught __________.

(a)

the fan operates hot and hence blades are liable to corrosion and erosion
(b)

positive pressure exists in the furnace
(c)

air is sucked in, so air leaks are more and hence furnace efficiency is reduced
(d)

none of the mentioned
Answer:

Option (b)

22.

The air pressure at the fuel bed is reduced below that of the atmosphere by means of a fan placed near the bottom of the chimney to produce a draught. Such a draught is called

(a)

natural draught
(b)

induced draught
(c)

forced draught
(d)

balanced draught
Answer:

Option (b)

23.

Where is fan installed in the induced draught system?

(a)

Near the boiler
(b)

Base of the chimney
(c)

Above the boiler
(d)

Between economizer and air preheater
Answer:

Option (b)

24.

Induced draught fan consume_________power compare to forced draught fan.

(a)

more
(b)

less
(c)

same 
(d)

may less or more
Answer:

Option (a)

25.

Which is the most preferred type of draught system?

(a)

Chimney draught
(b)

Fan draught
(c)

Force draught
(d)

Balanced draught
Answer:

Option (d)

26.

The draught produced by a steam jet issuing from a nozzle placed in the chimney is called

(a)

induced steam jet draught
(b)

forced steam jet draught
(c)

chimney draught
(d)

none of the given
Answer:

Option (a)

Showing 21 to 26 out of 26 Questions
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