In general, the limit of inflammability/explosion limit of fuel gases is widened by the__________________?
Correct answer: D. All A., B. & C.
- A. Increase in gas pressure
- B. Increase in temperature (i.e. preheating)
- C. Use of pure oxygen for combustion instead of air
- D. All A., B. & C.
Explanation
Higher pressure, preheating, and replacing air with oxygen generally make ignition easier and extend the lower and upper flammability limits. Thus all three changes can widen the explosive range of a fuel gas.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Coke oven gas burns with a yellowish flame, because of the presence of __________________?
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ______________°C?
Supply of excess air for complete combustion of fuel is necessitated to facilitate___________________?
Traces of tar fog present in the coke oven gas is removed by_________________?
C/H ratio is the maximum in case of_________________?
The bright glow of a combustion process is the characteristic of ______________ temperature oxidation of coal?