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WorksheetsPower Plant Engineering -Stokers and coal firing SMK GIET
Total questions: 10
Worksheet time: 10mins
High excess air in combustion of fuels results in __________
smoky flame
increased fuel consumption
incomplete combustion
none of the mentioned
_________ has the widest inflammability limit (explosion limit) of all the gases.
Carbon monoxide
Methane
c) Hydrogen
Acetylene
9. Oxygen percentage (by weight) in atmospheric air is?
22
20
19
21
The most common method(s) used for burning of coal is (are)
Stroker firing
Pulverized fuel firing
both (A) and (B)
None of the above
Direction of coal in overfeed stoker is
Upwards
Downwards
Stokers are classified into
over feed and underfeed
open and close
small , medium and large
none of the above
Travelling grate stoker is an example of ____
Overfeed
underfeed
both overfeed and under feed
none of the above
Underfeed stokers are divided into ______
single and multi retort
chain and belt type
all of the above
A ‘stroker’ is a power operated fuel ___ mechanism
Burning
Feeding
Handling
Storage
Underfeed mechanism is best suited for
Peat and Lignite
Bituminous and semi bituminous
peat and bituminous
all of the above
