Discussion
Assertion (A): Fuel sulphur reduction was necessary before diesel particulate filters could be adopted.
Reason (R): Sulphur poisons catalysts and is oxidised to sulphate that adds to measured particulate.
Select the correct answer from the options below.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the second gives both mechanisms. Sulphur adsorbs onto catalyst sites and suppresses their activity, and it is oxidised to sulphate that condenses and is weighed as particulate.
A filter fitted to high-sulphur fuel would therefore be defeated twice over: its regeneration catalyst poisoned, and sulphate added to the very quantity it was fitted to reduce. Cleaning the fuel was a precondition, which is why sulphur limits and the filter mandate were sequenced together.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development