Steam Generators and Boiler
Explain
the term Boiler Draught.
Why
draught is essential in boilers?
What
is the classification of draught?
Define
natural and artificial draught.
Explain
the function of chimney.
Mention
the advantages and disadvantages of mechanical draught.
Write
the difference between forced draught and induced draught.
What
do you understand by the term balanced draught?
Mention
the advantages and disadvantages of steam jet draught.
What
are the advantages of artificial draught over natural draught?
Mention
the various draught losses in boiler.
Derive
the equation to determine the height of chimney for a given natural draught.
Write
the formula for determination of diameter of chimney.
Derive
the equation for efficiency of chimney.
What
is the power required to drive fan in case of mechanical draught?
What
is the disadvantage of natural draught?
It
has less life
It
has more maintenance cost
The
available draught decrease with increasing outside temp
All
of the above
The
natural draught in the steam generator depends upon
The
air condition outside the chimney
The
temperature of exhaust gases
Both
a & b
none
How
is the natural draught produced for exhaust gases?
By
using fan
By
using chimney
By
using gravity
none
The
draught produced by a steam jet issuing from a nozzle placed in the ashpit
under the fire grate of the furnace is called
Chimney
draught
Induced
steam jet draught
Forced
steam jet draught
none
The
natural draught is produced by
Chimney
Centrifugal
fan
Steam
jet
None
Efficiency
of very tall chimney will be ______.
Power
of induced draught fan is greater than power of forced draught fan. True or
False.
Natural
draught is directly proportional to the _______.
Natural
draught is created at the cost of ________.
In
the induced steam jet, Kinetic head of steam is high but static head is low.
True or False.
Total
static draught required for artificial draught is _______.
Maximum
draught is produced by the chimney is ________.
Steam
jet draught is produced by using a ___________ velocity of jet steam.
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