The excess air required for the combustion of pulverized coal is of the order of about _______________ percent ?
Correct answer: B. 15
- A. 5
- B. 15
- C. 30
- D. 45
Explanation
Pulverized coal mixes rapidly with air and burns efficiently, so its excess-air requirement is commonly about 15%. Larger values such as 30% or 45% indicate poorer air-fuel mixing or less efficient combustion.
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
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by _____________ have residual stresses ?
_____________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C ?
Cold working of a material results in increase in hardness, which is termed as the ______________ hardening ?
Coating provided on the electrodes used in the arc welding is not expected to_________________?
Non-ferrous alloys used for making cutting tools need not have high__________________?
Transformer cores are normally made from ______________________?