Chemical Engineering MCQs

6108 MCQs (Page 336 of 611)

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Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

A. Silica gel
B. Diatomaceous earth
C. Basalt
D. Bog iron (i.e., mosit ferric hydroxide)

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Calorific value as determined by bomb calorimeter is the__________________?

A. Higher calorific value at constant volume
B. Gross calorific value at constant pressure
C. Lower calorific value at constant pressure
D. Net calorific value at constant volume

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Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about ______________ Kcal/Nm3?

A. 1,800
B. 3,200
C. 5,400
D. 10,200

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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

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Coke oven gas compared to blast furnace gas is________________?

A. More explosive and inflammable
B. Less posionous
C. Lighter
D. All a., b. and c.

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Which of the following gaseous fuels is likely to have the highest gross calorific value ?

A. Sewage gas
B. Lpg
C. Producer gas
D. Natural gas

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Mineral matter content (M) and ash content A. in coal are approximately related as _______________?

A. M = 1.1a
B. M = a
C. M = 1.5a
D. M = 2a

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Preheating of a gaseous fuel results in increased____________________?

A. Flame length
B. Flame temperature
C. Quantity of flue gas
D. Ignition temperature

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Efficiency of the combustion of a fuel is judged by the ______________ the flue gas?

A. % of co2 in
B. % of o2in
C. Temperature of
D. Colour of

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Which of the following is not applicable to fluidised bed combustion of coal ?

A. It cannot burn low grade coal
B. It achieves higher fuel combustion efficiency
C. Less heat transfer surface area is required in boilers
D. None of these

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