what is the advantages and dis advantages of critical
speed of turbine
Answer Posted / ashok ghadge
Turbine shaft is having its natural own frequency and due
to passing of steam shaft got forced frequency, when these
frequencies match (At critical speed) the sinusidal waves
of vibrations match and vibration amplitude is equal to
addition of respective amplitude of two waves. This gives
large amplitude for vibrations to the shaft. In such
situation shaft may fail.
Adv. Such critical speeds should be imediately overtaken to
safeguard the shaft.
Is This Answer Correct ? | 19 Yes | 3 No |
Post New Answer View All Answers
i need to prepare for iocl exam.pls provide me the book names for apptitude section which include reasoning,numerical ability,logical deductions......
What is NPSH of Pump
have a clutchless car or bike clutch for power transmission???
The lowest allowable insulation resistance?
What are thermal neutrons ?
Why you consider yourself suitable for the post
What is meant by gear ratio?
What is blower? Partlist of blower.
How will you create a piston head?
pls ,send me technical questions of jindal steels and power ltd
What are the advantages of white metal?
Fabrication Defects
What is the difference between air conditioning and refrigeration?
Hello Friends I had my ONGC test today,but it was very bad.But I would give certain suggestions so that u may not face he problem which i had. Be thorough with Electrical Technology.Generators.motors stators etc.There are 5 questions on that. There were also good no.of questions from Hydraulic machine and Production technology. Then 3 from Strength of materials.And remember the dimensional quantities.
What is a pneumatic system?