Related Questions

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
Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
A 1000
B 4000
C 6000
D 8000
Fixed capital investment of a chemical plant is the total amount of money needed to supply the necessary plant and manufacturing facilities plus the working capital for operation of the facilities. Which of the following components of fixed capital investment requires minimum percentage of it?
A Electrical installation cost
B Equipment installation cost
C Cost for piping
D Equipment insulation cost
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and difference of the digits of the number if the ratio between the digits the number is 1 : 2?
A 4
B 8
C 16
D 24
The difference between the radio of bigger difference between circle and smaller circle is 14 and the difference between their sareas is 1056 cm2 . Radius of the smaller circle is .
A 7 cm
B 5 cm
C 9 cm
D 3 cm
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
A H
B 12.6 H
C 13.6 H
D 14.6 H
Fixed carbon in coal is defined as
A that present in volatile matters
B the total quantity of carbon present in ash
C hundred minus the percentage of volatile matter ash & moisture
D the one which is present in the residue after ash formed
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always
A 1
B > 1
C Unpredictable
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.
A 15 to 25
B 35 to 45
C 55 to 75
D 75
Cannel coal and boghead coal are the examples of
A Humic coals
B Liptobiolites
C Sapropelic coals
D None of these

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