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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

The optimum percentage of excess air for combustion depends upon the _______________ of the fuel?
A Type (solid, liquid or gaseous)
B Calorific value
C Sulphur content
D Ignition temperature
Correct Answer: Type (solid, liquid or gaseous)
Pick out the wrong statement ?
A Theoretical flame temperature is the temperature attained by the products of combustion, when the fuel is burned without loss or gain of heat
B Burning the fuel with theoretically required amount of pure oxygen results in attainment of maximum adiabatic flame temperature
C Burning the fuel with excess pure oxygen results in maximum theoretical flame temperature
D Adiabatic flame temperatures of actual combustions are always less than the maximum values
Correct Answer: Burning the fuel with excess pure oxygen results in maximum theoretical flame temperature
Pick out the wrong statement ?
A Main constituents of LPG are propane and butane
B C.V. of natural gas is about 10000 KCal/Nm3
C C.V. of LPG is about 26000 kcal/Nm3 (11500 kcal/kg)
D L.P.G. is lighter than air
Correct Answer: L.P.G. is lighter than air
Pick out the wrong statement ?
A Cokes of high reactivity are obtained from weakly coking coals
B Cokes of high reactivity are obtained from strongly coking coals
C Reactivity of coke is inversely proportional to its absolute density
D Abrasion index of the coke is a measure of its hardness
Correct Answer: Cokes of high reactivity are obtained from strongly coking coals
Pick out the correct statement ?
A Oxygen content decreases from lignite to bituminous coal as the coalification increases
B The less the oxygen content, better is the coal, as it reduces the calorific value
C With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases
D All A., B. and C.
Correct Answer: All A., B. and C.
During coking of coal, the ash content (percentage)________________?
A Increases
B Decreases
C Remain constant
D None of these
Correct Answer: Increases
Stack (chimney) height in a big thermal power plant is dictated by the___________________?
A Pollution control aspect
B Draught to be created
C Limitation of constructional facilities
D None of these
Correct Answer: Draught to be created
The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?
A Fire point
B Smoke point
C Burning temperature
D Kindling temperature
Correct Answer: Burning temperature
Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?
A 6
B 12
C 18
D 24
Correct Answer: 24
The calorific value is the highest out of the following for__________________?
A Producer gas
B Water gas
C Coke oven gas
D Blast furnace gas
Correct Answer: Coke oven gas
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