Chemical Engineering MCQs

Page No. 301

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


aCombustion

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bNuclear fission

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cNuclear fusion

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dAll A., B. & C.

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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

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bAlways loss of heat from the flame

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cBoth A. and B.

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dNeither A. nor B.

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View Answer Both A. and B.

Fuel for a fast breeder nuclear reactor is____________________?


aPlutonium

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bUranium

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cRadium

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dNeptunium

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View Answer Plutonium

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


aDecreases

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bIncreases

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cRemain constant

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dMay increase or decrease, depends on combustibles

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


a1-2

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b10-15

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c22-26

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d30-33

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View Answer 1-2

Coking coals are invariably____________________?


aLignites

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bBituminous coals

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cSemi-anthracites

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dAnthracites

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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

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bRatio of fixed carbon to volatile matter increases

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cOxygen content progressively decreases

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dCalorific value of the coal increases

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


a2

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b4

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c6

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d1

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View Answer 2

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


a1500

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b3300

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c5400

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d8500

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View Answer 3300

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


aMuch lower

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bMuch higher

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cSame

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dEither lower or higher, depends on the type of fuel

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View Answer Much lower

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