Discussion
Why does a zirconia oxygen probe read low when unburnt fuel is present?
Answer: C
The probe is hot and catalytically active, so carbon monoxide and hydrocarbons reaching it burn on the electrode and locally deplete the oxygen, giving a reading below the true bulk value. In combustion control that is often useful, since it warns of incomplete burning, but for an accurate oxygen figure it is an error. Coating is a slow fouling failure rather than this effect, the sensor does not respond to hydrocarbons as such, and the reference side is sealed from the sample.
No comment is present. Be the first to comment.
Loading…
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