Discussion
Assertion (A): The critical Mach number of an aerofoil is lower than its drag-divergence Mach number.
Reason (R): Sonic flow first appears at the point of lowest pressure on the surface.
Select the correct answer from the options below.
Answer: A
Both statements are true, but the second is not the reason for the first. The critical value marks where sonic flow first appears anywhere on the surface; drag does not rise sharply until the supersonic pocket has grown large enough to end in a strong shock, which happens a little later. Where the sonic point first appears is a separate matter.
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