Up To Date Fuels And Combustion MCQs – New Chemical Engineering MCQs
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Latest Fuels And Combustion Mcqs
The most occurred mcqs of Fuels And Combustion in past papers. Past papers of Fuels And Combustion Mcqs. Past papers of Fuels And Combustion Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Fuels And Combustion Mcqs. The Important series of Fuels And Combustion Mcqs are given below:
Caking index of a coal is a measure of its _______________________?
A. Reactivity
B. Abradability
C. Agglutinating (binding) properties
D. Porosity
Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is __________________?
A. CO2
B. CH4
C. H2
D. N2
The shift conversion reaction taking place during water gas manufacture is given by__________________?
A. C + 2H2O ↔ CO2 + 2H2
B. C + H2O ↔ CO + H2
C. CO + H2O ↔ CO2 + H2
D. None of these
_____________ of the coal is the basis for Seylor’s coal classification?
A. Caking index
B. Ultimate analysis
C. Proximate analysis
D. Calorific value
In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?
A. Drying of coal
B. Transportation of coal
C. Combustion of coal by supplying it around the burner
D. Preheating the primary air
In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by__________________?
A. Cuprous chloride
B. Alkaline pyrogallol solution
C. Potassium hydroxide
D. None of these
Washing of coal decreases its_________________?
A. Ash content
B. Mineral matter content
C. Caking index
D. Both B. and C.
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________?
A. Shallow and small piles
B. Closed space without any ventilation facility
C. Fine sizes without the presence of any lump
D. Large heaps with small surface to volume ratio
The gas which contributes maximum to the heating value of natural gas is __________________?
A. CO2
B. CO
C. H2
D. CH4
Nitrogen in coal_________________?
A. Comes from protein in parent vegetable matter
B. Is present upto 1-2%
C. Is recovered as ammonia during its carbonisation
D. All A., B. and C.
Calorific value of blast furnace gas is around _____________ KCal/Nm3?
A. 850
B. 4200
C. 1800
D. 6500
Which of the following would require least amount of secondary air for combustion ?
A. Coke breeze containing 25% ash and 2% volatile matter
B. Bituminous coal containing 20% ash and 25% volatile matter
C. Anthracite containing 10% volatile matter and 8% ash
D. Semi-bituminous coal containing 25% ash and 20% volatile matter
Bulk density of pulverised coal may be about ______________ kg/m3?
A. 1000
B. 500
C. 100
D. 1500
Bunsen burner is an example of a/an _____________ burner?
A. Inside mixing/premix type
B. Outside mixing/diffusion flame/nozzle mix type
C. Submerged combustion
D. Rotary cup
The main drawback of supplying more excess air in the combustion of fuel is the_________________?
A. High exit flue gas temperature from the furnace
B. Enhanced sensible heat loss in the flue gas
C. Intermittent and uncontrolled combustion of the fuel
D. Excessive power requirement of air blower
The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
A. Lower than
B. Higher than
C. Not related to
D. Same as
Largest constituent of coke oven gas is_________________?
A. CH4
B. H2
C. N2
D. CO2
Bomb calorimeter can be used to determine the _____________ of the coal?
A. Calorific value
B. Sulphur content
C. Both A. & B.
D. Neither A. nor B.
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?
A. Less
B. More
C. Same
D. Data insufficient; can’t be predicted
Combustion reaction of fuels is a/an ______________ reaction?
A. Endothermic
B. Exothermic
C. Auto catalytic
D. None of these