Interested to Buy Any Domain ? << Click Here >> for more details...
Why rotating machines are not allowed to run near critical
speed region?
- 2 Answers
- 6480 Views
- I also Faced
- E-Mail Answers
Answer Posted / s.krishnan
critical speed is above 20 percentage of rated
speed.rotating machine rotate near to critical speed the
motor bearings are damaged.so rotating machines are not
allowed to run near critical speed region.
| Is This Answer Correct ? | 2 Yes | 5 No |
Post New Answer View All Answers
What is touch potential and step potential?
54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
what is the use of Auto re-closer?
How could a garment factory benefit from renewable energy
How to calculate the sag on transmission Lines.
how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?
what is the IS foe lightning arrester?
Hello Guys !! i want to rrb section engineer electrical(signal) previous model papers? any body help me?
1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
Different types of relay fault which phase sequence??
how to control dc motor?
1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?
How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?
What is the technical difference between On delay timer and a Star delta timer?
