Related Questions

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
A 400-500
B 900-1000
C 1400-1500
D 1700-1800
High pressure coal gasification is employed in __________ process.
A Lurgi
B Kopper-Totzek
C Winkler
D None of these
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon
A Is less liable to spontaneous combustion on storage
B Is more difficult to ignite and produces a shorter flame
C Requires smaller combustion space and less secondary air
D None of these
High temperature in gasification of coal favours
A High production of CO2
B Low production of CO2
C High production of CO
D Both B and C
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these
Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction?
A 2CO ⟷ C + CO2
B CO + H2O ⟷ CO2 + H2
C C + H2O ⟷ CO + H2
D C + 2H2O ⟷ CO2 + 2H2
Which of the following coal gasification processes will produce gas having maximum methane content?
A Winkler process
B Lurgi process
C Kopper-Totzek process
D All of the above
A circular flower bed has diameter 4m. The flower bed is increased so that the diameter is now 12m. How many times larger is the new flower bed?
A 9
B 3
C 32
D 8
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A Neutralised by alkali treatment
B Left as such without any treatment
C Diluted with fresh water to reduce its acidity
D None of these
Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
A Entrained
B Moving
C Fixed
D Fluidised

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