Chemical Engineering MCQs

Page No. 301

‘Fuel’ can be defined as a substance which produces heat by___________________?


aCombustion


bNuclear fission


cNuclear fusion


dAll A., B. & C.


View Answer All A., B. & C.

Actual flame temperature is always lower than the adiabatic flame temperature, because there is________________?


aNo possibility of obtaining complete combustion at high temperature


bAlways loss of heat from the flame


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

Fuel for a fast breeder nuclear reactor is____________________?


aPlutonium


bUranium


cRadium


dNeptunium


View Answer Plutonium

C.V. (kcal/Nm3) of gaseous fuels _____________ with increase in molecular weight?


aDecreases


bIncreases


cRemain constant


dMay increase or decrease, depends on combustibles



Volatile matter content of metallurgical coke may be around ______________ percent?


a1-2


b10-15


c22-26


d30-33


View Answer 1-2

Coking coals are invariably____________________?


aLignites


bBituminous coals


cSemi-anthracites


dAnthracites


View Answer Bituminous coals

Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?


aHigh rank coals have higher amount of volatile matter


bRatio of fixed carbon to volatile matter increases


cOxygen content progressively decreases


dCalorific value of the coal increases



Oxygen required for theoretically complete combustion of 1 Nm3 methane is ______________ Nm3?


a2


b4


c6


d1


View Answer 2

Calorific value of wood gas is about ______________ kcal/Nm3?


a1500


b3300


c5400


d8500


View Answer 3300

The maximum adiabatic flame temperature in air as compared to that in pure oxygen is_______________?


aMuch lower


bMuch higher


cSame


dEither lower or higher, depends on the type of fuel


View Answer Much lower

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