Discussion
That machine's mechanical output power is
Answer: C
Correct answer: 19 kW
The mechanical power is what is left of the air gap power after the rotor copper loss:
\[ P_{mech} = (1-s)P_g = 0.95 \times 20 = 19 \text{ kW} \]The shaft output is a little less again, by the friction and windage. Note that the rotor efficiency here is 95 per cent, equal to \( 1-s \), which is the ceiling any scheme controlling speed by slip must live under.
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