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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

Presence of phosphorous in metallurgical coal__________________?
A Is not undesirable
B Reduces its calorific value
C Badly affects the quality of steel
D Increases its caking power
Correct Answer: Badly affects the quality of steel
Which is the heaviest fuel gas out of the following ?
A Blast furnace gas
B Coke oven gas
C Water gas
D Carburetted water gas
Correct Answer: Blast furnace gas
The calorific value of producer gas is around _____________ kcal/Nm3?
A 1300
B 500
C 4500
D 9000
Correct Answer: 1300
Short/intense flame is produced during combustion of gaseous fuel by using________________?
A High amount/current of combustion air
B Low amount/current of combustion air
C Preheated secondary air
D Very little excess air
Correct Answer: High amount/current of combustion air
During combustion of coal on grate, clinker formation is increased by the___________________?
A Use of thick fire bed
B Low fusion point of ash (< 1100° C)
C Use of preheated primary air
D All A., B. & C.
Correct Answer: All A., B. & C.
Calorific value of coke even gas produced by low temperature carbonisation of coal is about ____________ Kcal/Nm3?
A 4000
B 2500
C 6500
D 10000
Correct Answer: 6500
Softening temperature of coal ash is a measure of the _____________ of coal?
A Caking tendency
B Coking tendency
C Clinkering tendency
D Size stability
Correct Answer: Clinkering tendency
A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is_________________?
A CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60
B CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
C CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06
D CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74
Correct Answer: CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02
Higher fuel combustion efficiency cannot be achieved by_________________?
A Preheating of fuel gases & combustion air
B Reducing sulphur content in the fuel
C Adopting proper fuel firing technique & fuel preparation
D Supplying correct amount of combustion air
Correct Answer: Reducing sulphur content in the fuel
Tolerable concentration of toxic carbon monoxide in atmospheric air is about ______________ ppm?
A 50
B 1000
C 5000
D 10000
Correct Answer: 50
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