Discussion
Arrange the causal chain of stack tip downwash:
1. Exit velocity falls below about one and a half times the wind speed
2. A low pressure region forms immediately downwind of the stack
3. The plume is drawn into that region rather than rising
4. Effective stack height falls and ground level concentration rises
Select the correct sequence.
Answer: A
Correct answer: 1, 2, 3, 4
The chain runs: exit velocity falls below about 1.5 times the wind speed → the wind separating round the stack leaves a low-pressure region immediately downwind → the slow plume is drawn into it rather than rising → effective stack height falls and ground-level concentration rises. The pressure region forms because of the flow round the stack, so it follows the velocity condition rather than preceding it.
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