Discussion
Assertion (A): A propeller becomes unsuitable above roughly four hundred knots.
Reason (R): Blade tip speed combines rotational and forward velocity and reaches sonic conditions first.
Select the correct answer from the options below.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. The tip sees the vector sum of the rotational and forward velocities, so it reaches sonic conditions well before the aircraft does. Once it does, compressibility losses and noise rise sharply and the propeller’s efficiency collapses, which is what sets the practical ceiling of around four hundred knots for a conventional propeller.
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